TY  - CONF
AU  - Lačnjevac, Uroš
AU  - Vasilic, Rastko
AU  - Dobrota, Ana S.
AU  - Đurđić, Slađana
AU  - Tomanec, Ondřej
AU  - Zbořil, Radek
AU  - Mohajernia, Shiva
AU  - Nguyen, Nhat Truong
AU  - Skorodumova, Natalia
AU  - Manojlović, Dragan
AU  - Elezović, Nevenka R.
AU  - Pasti, Igor
AU  - Schmuki, Patrik
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2843
AB  - Designing cost-effective hydrogen evolution reaction (HER) electrocatalysts containing highly active, but expensive platinum group metals (PGMs) is key to the commercialization of polymer electrolyte membrane water electrolysis systems for green hydrogen production. Our recent investigations have shown that efficient and durable HER composite cathodes can be prepared by spontaneous deposition of PGM nanoparticles on self-aligned titania nanotube (TNT) arrays formed by anodization [1]. In this synthesis route, anatase TNTs are first cathodically protonated (H-TNT), and then used as the reducing agent for PGM ions at room temperature. Herein, we employ the galvanic displacement strategy to decorate H-TNT arrays with ultrafine Ir nanoparticles [2]. We demonstrate that transforming the top surface morphology of supporting TNT arrays from ordered open-top tubes to bundled nanowires (“nanograss”) is beneficial for exposing more Ir active centers during the HER operation. Consequently, applying very low concentrations of Ir(III) ions in the galvanic displacement step is sufficient to produce exceptionally active nanograss-modified Ir@TNT composites. An optimum Ir@TNT, possessing a low Ir loading of 5.7 μgIr cm–2, requires an overpotential of only –63 mV to reach a current density of –100 mA cm–2 and shows a stable long-term performance in a 1 M HClO4 solution. Computational simulations suggest that the hydrogen-rich TiO2 support not only strongly interacts with anchored Ir particles and weakens their H binding strength to a moderate level, but also actively provides hydrogen for rejuvenation of the Ir active sites at the Ir|H-TiO2 interface, thereby significantly enhancing HER catalysis.

[1] U.Č. Lačnjevac, R. Vasilić, T. Tokarski, G. Cios, P. Żabiński, N. Elezović and N. V. Krstajić, Nano Energy 47 (2018) 527.
[2] U. Lačnjevac, R. Vasilić, A. Dobrota, S. Đurđić, O. Tomanec, R. Zbořil, S. Mohajernia, N.T. Nguyen, N. Skorodumova, D. Manojlović, N. Elezović, I. Pašti, P. Schmuki, Journal of Materials Chemistry A 8 (2020) 22773.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - TiO2 nanotube arrays decorated with Ir nanoparticles for enhanced hydrogen evolution electrocatalysis
EP  - 74
SP  - 73
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2843
ER  - 

@conference{
author = "Lačnjevac, Uroš and Vasilic, Rastko and Dobrota, Ana S. and Đurđić, Slađana and Tomanec, Ondřej and Zbořil, Radek and Mohajernia, Shiva and Nguyen, Nhat Truong and Skorodumova, Natalia and Manojlović, Dragan and Elezović, Nevenka R. and Pasti, Igor and Schmuki, Patrik",
year = "2023",
abstract = "Designing cost-effective hydrogen evolution reaction (HER) electrocatalysts containing highly active, but expensive platinum group metals (PGMs) is key to the commercialization of polymer electrolyte membrane water electrolysis systems for green hydrogen production. Our recent investigations have shown that efficient and durable HER composite cathodes can be prepared by spontaneous deposition of PGM nanoparticles on self-aligned titania nanotube (TNT) arrays formed by anodization [1]. In this synthesis route, anatase TNTs are first cathodically protonated (H-TNT), and then used as the reducing agent for PGM ions at room temperature. Herein, we employ the galvanic displacement strategy to decorate H-TNT arrays with ultrafine Ir nanoparticles [2]. We demonstrate that transforming the top surface morphology of supporting TNT arrays from ordered open-top tubes to bundled nanowires (“nanograss”) is beneficial for exposing more Ir active centers during the HER operation. Consequently, applying very low concentrations of Ir(III) ions in the galvanic displacement step is sufficient to produce exceptionally active nanograss-modified Ir@TNT composites. An optimum Ir@TNT, possessing a low Ir loading of 5.7 μgIr cm–2, requires an overpotential of only –63 mV to reach a current density of –100 mA cm–2 and shows a stable long-term performance in a 1 M HClO4 solution. Computational simulations suggest that the hydrogen-rich TiO2 support not only strongly interacts with anchored Ir particles and weakens their H binding strength to a moderate level, but also actively provides hydrogen for rejuvenation of the Ir active sites at the Ir|H-TiO2 interface, thereby significantly enhancing HER catalysis.

[1] U.Č. Lačnjevac, R. Vasilić, T. Tokarski, G. Cios, P. Żabiński, N. Elezović and N. V. Krstajić, Nano Energy 47 (2018) 527.
[2] U. Lačnjevac, R. Vasilić, A. Dobrota, S. Đurđić, O. Tomanec, R. Zbořil, S. Mohajernia, N.T. Nguyen, N. Skorodumova, D. Manojlović, N. Elezović, I. Pašti, P. Schmuki, Journal of Materials Chemistry A 8 (2020) 22773.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "TiO2 nanotube arrays decorated with Ir nanoparticles for enhanced hydrogen evolution electrocatalysis",
pages = "74-73",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2843"
}

Lačnjevac, U., Vasilic, R., Dobrota, A. S., Đurđić, S., Tomanec, O., Zbořil, R., Mohajernia, S., Nguyen, N. T., Skorodumova, N., Manojlović, D., Elezović, N. R., Pasti, I.,& Schmuki, P.. (2023). TiO2 nanotube arrays decorated with Ir nanoparticles for enhanced hydrogen evolution electrocatalysis. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 73-74.
https://hdl.handle.net/21.15107/rcub_rimsi_2843

Lačnjevac U, Vasilic R, Dobrota AS, Đurđić S, Tomanec O, Zbořil R, Mohajernia S, Nguyen NT, Skorodumova N, Manojlović D, Elezović NR, Pasti I, Schmuki P. TiO2 nanotube arrays decorated with Ir nanoparticles for enhanced hydrogen evolution electrocatalysis. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;:73-74.
https://hdl.handle.net/21.15107/rcub_rimsi_2843 .

Lačnjevac, Uroš, Vasilic, Rastko, Dobrota, Ana S., Đurđić, Slađana, Tomanec, Ondřej, Zbořil, Radek, Mohajernia, Shiva, Nguyen, Nhat Truong, Skorodumova, Natalia, Manojlović, Dragan, Elezović, Nevenka R., Pasti, Igor, Schmuki, Patrik, "TiO2 nanotube arrays decorated with Ir nanoparticles for enhanced hydrogen evolution electrocatalysis" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023):73-74,
https://hdl.handle.net/21.15107/rcub_rimsi_2843 .

TY  - GEN
AU  - Elezović, Nevenka R.
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2329
AB  - Electrodeposited Co-Ru alloys at Ti2AlC suport as the catalysts for hydrogen production by water electrolysis towards sustainable economic development
Nevenka Elezovic1*, D. Kutyla2, M. Krstajić Pajić3, U. Lačnjevac1, P. Zabinski2
1*University of Belgrade, Institute for Multidisciplinary Research, Kneza Viseslava 1, 11000 Belgrade, Serbia, *invited-presenting author – nelezovic@tmf.bg.ac.rs                                                       
2 Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland;
3 University of Belgrade, Faculty of Technology and Metallurgy, 11000 Belgrade, Serbia;
Abstract
Cobalt-ruthenium alloys were electrochemically deposited at Ti2AlC suport from hloride based acid electrolyte. Thin layers of Co-Ru were obtained by potentiostatic electrodeposition in the potential range of -0.6 V to -1.0 V vs SCE. The chemical composition and physical-chemical characterization have been performed by X-ray Fluorescence spectroscopy (XRF), X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM-EDS).  It was found that increasing of Co content in the alloy led to gradual shift of the crystalline structure from HCP to FCC Co-Ru solid solution. The electrochemical characterization of the catalysts was done by linear sweep voltammetry, cyclic voltammetry and electrochemical impedance spectroscopy in alkaline electrolyte. The optimal conditions for deposition of nanocrystalline Co-Ru alloys with superior activity for hydrogen evolution were discussed in terms of activity and stability, as well as commercial acceptable costs for the catalysts production. 
Acknowledgements: This work was supported by the Ministry of Science and Technological Development Republic of Serbia (Contract No. 451-03-68/2023-14/200053 and Contract No. 451-03-68/2023-14/200135). The authors would like to thank Prof. M. Barsoum, Drexel University–Philadelphia USA for Ti2AlC preparation.
Keywords: Electrodeposition; Co– Ru alloys; MAX phases; Hydrogen Renewable Energy; Water splitting; 
Biography
Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests include: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis application - green energy production. Since 2013 she has been serving as national representative of Serbia and member of the European board in European Academy of Surface Technology: 
http://www.east-site.net. 
She has published more than 40 papers in high impact peer reviewed journals of eminent Publishers such as Elsevier, Royal Society of Chemistry, Springer, The Electrochemical Society and more than 70 conference papers. She has been serving as a reviewer for: Energy and Environmental Science, Applied Materials and Interfaces, Journal of Materials Chemistry A, Electrochimica Acta, Applied Catalysis B: Environmental, Journal of the Electrochemical Society, International Journal of Hydrogen Energy, as well as adjudicative (senior) reviewer for Energy and Environmental Science. She has given numerous invited lectures at the International conferences, recently at International Summit on Conventional and Sustainable Energies, 2018 Orlando, Florida, USA; Global Experts Meeting in Green Energy, 2019, Rome, Italy; Materials, the Building Block for the Future 3rd AAAFM-UCLA, 2021 Los Angeles USA; Euro-Global Climate Change conference, 2022, Paris, France.
Web page: http://www.imsi.bg.ac.rs/en/researchers/nevenka-r-elezovic
PB  - International Science and Technology Conference Institute (ISTCI)
T2  - International Congress on Advanced Materials Sciences and Engineering (AMSE-2023)
T1  - Electrodeposited Co-Ru alloys at Ti2AlC suport as the catalysts for hydrogen production by water electrolysis towards sustainable economic development
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2329
ER  - 

@misc{
author = "Elezović, Nevenka R.",
year = "2023",
abstract = "Electrodeposited Co-Ru alloys at Ti2AlC suport as the catalysts for hydrogen production by water electrolysis towards sustainable economic development
Nevenka Elezovic1*, D. Kutyla2, M. Krstajić Pajić3, U. Lačnjevac1, P. Zabinski2
1*University of Belgrade, Institute for Multidisciplinary Research, Kneza Viseslava 1, 11000 Belgrade, Serbia, *invited-presenting author – nelezovic@tmf.bg.ac.rs                                                       
2 Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland;
3 University of Belgrade, Faculty of Technology and Metallurgy, 11000 Belgrade, Serbia;
Abstract
Cobalt-ruthenium alloys were electrochemically deposited at Ti2AlC suport from hloride based acid electrolyte. Thin layers of Co-Ru were obtained by potentiostatic electrodeposition in the potential range of -0.6 V to -1.0 V vs SCE. The chemical composition and physical-chemical characterization have been performed by X-ray Fluorescence spectroscopy (XRF), X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM-EDS).  It was found that increasing of Co content in the alloy led to gradual shift of the crystalline structure from HCP to FCC Co-Ru solid solution. The electrochemical characterization of the catalysts was done by linear sweep voltammetry, cyclic voltammetry and electrochemical impedance spectroscopy in alkaline electrolyte. The optimal conditions for deposition of nanocrystalline Co-Ru alloys with superior activity for hydrogen evolution were discussed in terms of activity and stability, as well as commercial acceptable costs for the catalysts production. 
Acknowledgements: This work was supported by the Ministry of Science and Technological Development Republic of Serbia (Contract No. 451-03-68/2023-14/200053 and Contract No. 451-03-68/2023-14/200135). The authors would like to thank Prof. M. Barsoum, Drexel University–Philadelphia USA for Ti2AlC preparation.
Keywords: Electrodeposition; Co– Ru alloys; MAX phases; Hydrogen Renewable Energy; Water splitting; 
Biography
Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests include: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis application - green energy production. Since 2013 she has been serving as national representative of Serbia and member of the European board in European Academy of Surface Technology: 
http://www.east-site.net. 
She has published more than 40 papers in high impact peer reviewed journals of eminent Publishers such as Elsevier, Royal Society of Chemistry, Springer, The Electrochemical Society and more than 70 conference papers. She has been serving as a reviewer for: Energy and Environmental Science, Applied Materials and Interfaces, Journal of Materials Chemistry A, Electrochimica Acta, Applied Catalysis B: Environmental, Journal of the Electrochemical Society, International Journal of Hydrogen Energy, as well as adjudicative (senior) reviewer for Energy and Environmental Science. She has given numerous invited lectures at the International conferences, recently at International Summit on Conventional and Sustainable Energies, 2018 Orlando, Florida, USA; Global Experts Meeting in Green Energy, 2019, Rome, Italy; Materials, the Building Block for the Future 3rd AAAFM-UCLA, 2021 Los Angeles USA; Euro-Global Climate Change conference, 2022, Paris, France.
Web page: http://www.imsi.bg.ac.rs/en/researchers/nevenka-r-elezovic",
publisher = "International Science and Technology Conference Institute (ISTCI)",
journal = "International Congress on Advanced Materials Sciences and Engineering (AMSE-2023)",
title = "Electrodeposited Co-Ru alloys at Ti2AlC suport as the catalysts for hydrogen production by water electrolysis towards sustainable economic development",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2329"
}

Elezović, N. R.. (2023). Electrodeposited Co-Ru alloys at Ti2AlC suport as the catalysts for hydrogen production by water electrolysis towards sustainable economic development. in International Congress on Advanced Materials Sciences and Engineering (AMSE-2023)
International Science and Technology Conference Institute (ISTCI)..
https://hdl.handle.net/21.15107/rcub_rimsi_2329

Elezović NR. Electrodeposited Co-Ru alloys at Ti2AlC suport as the catalysts for hydrogen production by water electrolysis towards sustainable economic development. in International Congress on Advanced Materials Sciences and Engineering (AMSE-2023). 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2329 .

Elezović, Nevenka R., "Electrodeposited Co-Ru alloys at Ti2AlC suport as the catalysts for hydrogen production by water electrolysis towards sustainable economic development" in International Congress on Advanced Materials Sciences and Engineering (AMSE-2023) (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2329 .

TY  - GEN
AU  - Elezović, Nevenka R.
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2328
AB  - Green Hydrogen Energy Based Economy to Decrease Climate Changes for Environmental Friendly-Sustainable Development 
Nevenka R. Elrzovic
University of Belgrade, Institute for Multidisciplinary Research, Center of Excellence for Green Technologies, Kneza Viseslava 1, 11000 Belgrade, Serbia, nelezovic@tmf.bg.ac.rs                                                       
Abstract: Intensive fossil fuel application leads to the growing environment pollution, causing the "greenhouse effect". During the 20th century the CO2 concentration increased about 20%, being the main reason for average temperature increase on Earth. This fact has already caused undesirable climate changes. United Nations has recognized environment pollution effects and global actions have already been taken. From Stockholm conference held in 1972 to COP 2022, United Nations announced several declarations to stabilize gas emission and decrease greenhouse effect. European Union has established main targets until 2030, in the frame of Climate and Energy Package, to increase alternative power sources usage and save environment. Thus, the further development of green hydrogen production and fuel cells catalysts as environmental friendly-green technologies are extremely desirable, to achieve sustainable economic development. Hydrogen – high efficiency and environmental friendly fuel, produced by water electrolysis is used in low temperature fuel cells, while oxidative agent is oxygen from air. In this work novel nanostructured materials with noble metal nanoparticles deposited onto ceramics based supports have been investigated as the catalysts for fuel cells, promising alternative power sources. Several ceramic supports were developed - Ti, Sn and W based oxides, doped by Ru or Nb to improve conductivity. Physical-chemical and electrochemical characterization of these novel materials confirmed  higher efficiency and long term stability to decrease the costs and increase life time of fuel cells acceptable for commercial application.
Biography: Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis applications – environmental friendly green energy production. Since 2013 she has been serving as national representative of Serbia and member of the European board in European Academy of Surface Technology: http://www.east-site.net. She has published more than 50 papers in high impact peer reviewed international journals and more than 70 conference papers. Web page: 
http://www.imsi.bg.ac.rs/en/researchers/nevenka-r-elezovic         
Details of the Presenting Author: 	                          
Nevenka R. Elezovic: 
nelezovic@tmf.bg.ac.rs 
elezovic@imsi.bg.ac.rs
Serbia: 
Presentation Category: Oral-Keynote lecture 
Recent Photograph: (High Resolution)
PB  - 2nd world conference on environmental and earth sciences and world conference on recycling and waste managemen
T2  - 2nd world conference on environmental and earth sciences and world conference on recycling and waste management
T1  - Green Hydrogen Energy Based Economy to Decrease Climate Changes for Environmental Friendly-Sustainable Development
EP  - 9
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2328
ER  - 

@misc{
author = "Elezović, Nevenka R.",
year = "2023",
abstract = "Green Hydrogen Energy Based Economy to Decrease Climate Changes for Environmental Friendly-Sustainable Development 
Nevenka R. Elrzovic
University of Belgrade, Institute for Multidisciplinary Research, Center of Excellence for Green Technologies, Kneza Viseslava 1, 11000 Belgrade, Serbia, nelezovic@tmf.bg.ac.rs                                                       
Abstract: Intensive fossil fuel application leads to the growing environment pollution, causing the "greenhouse effect". During the 20th century the CO2 concentration increased about 20%, being the main reason for average temperature increase on Earth. This fact has already caused undesirable climate changes. United Nations has recognized environment pollution effects and global actions have already been taken. From Stockholm conference held in 1972 to COP 2022, United Nations announced several declarations to stabilize gas emission and decrease greenhouse effect. European Union has established main targets until 2030, in the frame of Climate and Energy Package, to increase alternative power sources usage and save environment. Thus, the further development of green hydrogen production and fuel cells catalysts as environmental friendly-green technologies are extremely desirable, to achieve sustainable economic development. Hydrogen – high efficiency and environmental friendly fuel, produced by water electrolysis is used in low temperature fuel cells, while oxidative agent is oxygen from air. In this work novel nanostructured materials with noble metal nanoparticles deposited onto ceramics based supports have been investigated as the catalysts for fuel cells, promising alternative power sources. Several ceramic supports were developed - Ti, Sn and W based oxides, doped by Ru or Nb to improve conductivity. Physical-chemical and electrochemical characterization of these novel materials confirmed  higher efficiency and long term stability to decrease the costs and increase life time of fuel cells acceptable for commercial application.
Biography: Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis applications – environmental friendly green energy production. Since 2013 she has been serving as national representative of Serbia and member of the European board in European Academy of Surface Technology: http://www.east-site.net. She has published more than 50 papers in high impact peer reviewed international journals and more than 70 conference papers. Web page: 
http://www.imsi.bg.ac.rs/en/researchers/nevenka-r-elezovic         
Details of the Presenting Author: 	                          
Nevenka R. Elezovic: 
nelezovic@tmf.bg.ac.rs 
elezovic@imsi.bg.ac.rs
Serbia: 
Presentation Category: Oral-Keynote lecture 
Recent Photograph: (High Resolution)",
publisher = "2nd world conference on environmental and earth sciences and world conference on recycling and waste managemen",
journal = "2nd world conference on environmental and earth sciences and world conference on recycling and waste management",
title = "Green Hydrogen Energy Based Economy to Decrease Climate Changes for Environmental Friendly-Sustainable Development",
pages = "9",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2328"
}

Elezović, N. R.. (2023). Green Hydrogen Energy Based Economy to Decrease Climate Changes for Environmental Friendly-Sustainable Development. in 2nd world conference on environmental and earth sciences and world conference on recycling and waste management
2nd world conference on environmental and earth sciences and world conference on recycling and waste managemen..
https://hdl.handle.net/21.15107/rcub_rimsi_2328

Elezović NR. Green Hydrogen Energy Based Economy to Decrease Climate Changes for Environmental Friendly-Sustainable Development. in 2nd world conference on environmental and earth sciences and world conference on recycling and waste management. 2023;:null-9.
https://hdl.handle.net/21.15107/rcub_rimsi_2328 .

Elezović, Nevenka R., "Green Hydrogen Energy Based Economy to Decrease Climate Changes for Environmental Friendly-Sustainable Development" in 2nd world conference on environmental and earth sciences and world conference on recycling and waste management (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2328 .

TY  - GEN
AU  - Elezović, Nevenka R.
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2333
AB  - MAX phases as the catalysts support materials for green energy related applications   

Nevenka R. Elezovic 
University of Belgrade-Institute for Multidisciplinary Research, Center of Excellence for Green Technologies, Kneza Viseslava 1, 11000 Belgrade, Serbia
*Corresponding Author E-mail: nelezovic@tmf.bg.ac.rs
ABSTRACT 

 MAX phases – specific materials of general formula Mn+1AXn, (MAX) where n = 1 to 4, where M is early transition metal, A is element from the group of Al, Si or P and X is carbon or nitrogen, have attracted great attention in materials science, especially as high performance supports for noble metals group catalysts intended to be used for hydrogen production by water electrolysis, as well as for fuel cells reactions. These materials demonstrated good mechanical properties, high conductivity, high chemical and corrosion stability, especially in the potential range from hydrogen to oxygen evolution that is of great interest for low temperature fuel cells reactions. In this research ultra- low loading platinum layers were deposited onto Ti2AlC and (Nb-Ti)2AlC MAX phases supports and characterized as the catalysts for anode (hydrogen oxidation) and cathode (oxygen reduction) reactions for low temperature fuel cells. Physical-chemical characterization was performed by: Scanning Electron Microscopy (SEM), X-Ray Photoelectron Spectroscopy (XPS), Focus-Ion Beam High Resolution Transmission Electron Microscopy (FIB-HRTEM).  The electrochemical characterization for both anode and cathode reactions was done by cyclic voltammetry and linear sweep voltammetry and very good activities were confirmed in comparison to carbon supported commercial catalysts. It should be emphasized that progress beyond state of the art was made in terms of lower Pt loading - being only 18.3 µg cm-2 (for HOR the state of the art is ≈ 50 µg cm-2,  while for ORR 200 -400 µg cm-2).  These novel catalysts exhibited high durability according to US DOE standardized tests, as well. It is worthy to mention that the support materials are low cost and electrodeposition, as well.
Acknowledgements: This work was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Contract No. Contract No. 451-03-68/2022-14/200053). The author would like to thank Prof. M. Barsoum, Drexel University – Philadelphia PA 1 USA for preparation of MAX phases based substrates.
Keywords: Fuel cells; MAX phases; ORR and HOR catalysts; low Pt loading layers;

Biography: Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests include: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis application - green energy production. Since 2013 she has been serving as representative of Serbia and member of the European board in European Academy of Surface Technology,http://www.east-site.net. She has published more than 40 papers in reputed peer reviewed journals of eminent Publishers such as Elsevier, Royal Society of Chemistry, The Electrochemical Society and more than 70 conference papers. She has been serving as a reviewer for: Energy and Environmental Science, Applied Materials and Interfaces, Journal of Materials Chemistry A, Electrochimica Acta, Applied Catalysis B: Environmental, RSC Advances, Journal of the Electrochemical Society, International Journal of Hydrogen Energy, as well as adjudicative (senior) reviewer for Energy and Environmental Science and Journal of Materials Chemistry A. She has given numerous invited lectures at the International conferences, recently at International Summit on Conventional and Sustainable Energies, March 30-31, 2018 Orlando, Florida, USA; Global Experts Meeting on Frontiers in Green Energy and Expo, October 14-16, 2019 Rome, Italy; Materials, the Building Block for the Future 3rd AAAFM-UCLA conference, August 18-20 2021 Los Angeles USA; Euro-Global Climate Change Conference, September 19-20, 2022 Paris, France.
PB  - SPECTRUM CONFERENCES   Sri Krishna Arcade, D.No. 45-57-6/1, 4th Floor, Near Raithu Bazar, Narasimha Nagar, Visakhapatnam, AP, 530024
T2  - International Summit on Non-Renewable and Renewable Energy
T1  - MAX phases as the catalysts support materials for green energy related applications
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2333
ER  - 

@misc{
author = "Elezović, Nevenka R.",
year = "2023",
abstract = "MAX phases as the catalysts support materials for green energy related applications   

Nevenka R. Elezovic 
University of Belgrade-Institute for Multidisciplinary Research, Center of Excellence for Green Technologies, Kneza Viseslava 1, 11000 Belgrade, Serbia
*Corresponding Author E-mail: nelezovic@tmf.bg.ac.rs
ABSTRACT 

 MAX phases – specific materials of general formula Mn+1AXn, (MAX) where n = 1 to 4, where M is early transition metal, A is element from the group of Al, Si or P and X is carbon or nitrogen, have attracted great attention in materials science, especially as high performance supports for noble metals group catalysts intended to be used for hydrogen production by water electrolysis, as well as for fuel cells reactions. These materials demonstrated good mechanical properties, high conductivity, high chemical and corrosion stability, especially in the potential range from hydrogen to oxygen evolution that is of great interest for low temperature fuel cells reactions. In this research ultra- low loading platinum layers were deposited onto Ti2AlC and (Nb-Ti)2AlC MAX phases supports and characterized as the catalysts for anode (hydrogen oxidation) and cathode (oxygen reduction) reactions for low temperature fuel cells. Physical-chemical characterization was performed by: Scanning Electron Microscopy (SEM), X-Ray Photoelectron Spectroscopy (XPS), Focus-Ion Beam High Resolution Transmission Electron Microscopy (FIB-HRTEM).  The electrochemical characterization for both anode and cathode reactions was done by cyclic voltammetry and linear sweep voltammetry and very good activities were confirmed in comparison to carbon supported commercial catalysts. It should be emphasized that progress beyond state of the art was made in terms of lower Pt loading - being only 18.3 µg cm-2 (for HOR the state of the art is ≈ 50 µg cm-2,  while for ORR 200 -400 µg cm-2).  These novel catalysts exhibited high durability according to US DOE standardized tests, as well. It is worthy to mention that the support materials are low cost and electrodeposition, as well.
Acknowledgements: This work was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Contract No. Contract No. 451-03-68/2022-14/200053). The author would like to thank Prof. M. Barsoum, Drexel University – Philadelphia PA 1 USA for preparation of MAX phases based substrates.
Keywords: Fuel cells; MAX phases; ORR and HOR catalysts; low Pt loading layers;

Biography: Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests include: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis application - green energy production. Since 2013 she has been serving as representative of Serbia and member of the European board in European Academy of Surface Technology,http://www.east-site.net. She has published more than 40 papers in reputed peer reviewed journals of eminent Publishers such as Elsevier, Royal Society of Chemistry, The Electrochemical Society and more than 70 conference papers. She has been serving as a reviewer for: Energy and Environmental Science, Applied Materials and Interfaces, Journal of Materials Chemistry A, Electrochimica Acta, Applied Catalysis B: Environmental, RSC Advances, Journal of the Electrochemical Society, International Journal of Hydrogen Energy, as well as adjudicative (senior) reviewer for Energy and Environmental Science and Journal of Materials Chemistry A. She has given numerous invited lectures at the International conferences, recently at International Summit on Conventional and Sustainable Energies, March 30-31, 2018 Orlando, Florida, USA; Global Experts Meeting on Frontiers in Green Energy and Expo, October 14-16, 2019 Rome, Italy; Materials, the Building Block for the Future 3rd AAAFM-UCLA conference, August 18-20 2021 Los Angeles USA; Euro-Global Climate Change Conference, September 19-20, 2022 Paris, France.",
publisher = "SPECTRUM CONFERENCES   Sri Krishna Arcade, D.No. 45-57-6/1, 4th Floor, Near Raithu Bazar, Narasimha Nagar, Visakhapatnam, AP, 530024",
journal = "International Summit on Non-Renewable and Renewable Energy",
title = "MAX phases as the catalysts support materials for green energy related applications",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2333"
}

Elezović, N. R.. (2023). MAX phases as the catalysts support materials for green energy related applications. in International Summit on Non-Renewable and Renewable Energy
SPECTRUM CONFERENCES   Sri Krishna Arcade, D.No. 45-57-6/1, 4th Floor, Near Raithu Bazar, Narasimha Nagar, Visakhapatnam, AP, 530024..
https://hdl.handle.net/21.15107/rcub_rimsi_2333

Elezović NR. MAX phases as the catalysts support materials for green energy related applications. in International Summit on Non-Renewable and Renewable Energy. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2333 .

Elezović, Nevenka R., "MAX phases as the catalysts support materials for green energy related applications" in International Summit on Non-Renewable and Renewable Energy (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2333 .

TY  - GEN
AU  - Elezović, Nevenka R.
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2335
AB  - Razvoj novih katalizatora za niskotemperaturne gorivne ćelije-izazovi i perspektive
Nevenka R. Elezovic1
1 Univerzitet u Beogradu, Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11030 Beograd, Srbija
*adresa za korespondenciju: nelezovici@tmf.bg.ac.rs

Niskotemperaturne gorivne ćelije pripadaju grupi obnovljivih, ekološki prihvatljivih izvora energije. Primena zelenog vodonika kao čistog goriva, dobijenog elektrolizom vode, doprinosi zaštiti životne sredine, dostizanju održivog ekonomskog razvoja i cirkularne ekonomije, kao imperativa u procesu energetske tranzicije sa fosilnih goriva ka obnovljivim izvorima energije. 
U ovom radu će biti dat pregled razvoja novih materijala za katalizatore u reakcijama  redukcije kiseonika i oksidacije vodonika, koje se odbvijaju u niskotemeraturnim vodoničnim gorivnim ćelijama. Naime, današnji komercijalni katalizatori su na bazi platine dispergovane na ugljeničnim nosačima razvijene površine-komercijalno nazvanim Vulkan XC-72 i Ketjen Black. Nedostatak ovih katalizatora je nedovoljna stabilnost, posebno na anodnim potencijalima 1.4 V prema reverzibilnoj vodoničnoj elektrodi,  velika cena platine i još uvek velika masa Pt potrebne za isplativu masovnu komercijalizaciju, posebno za redukciju kiseonika, usled velike prenapetiosti i spore kinetike [1,2]. Razvoj novih katalizatora i nosača na bazi metalnih oksida [3] - titanijuma,  kalaja, wolframa,  kao i drugih neorganskih keramičkih materijala – karbida, nitrida [4] obeležio je poslednjih par decenija u radovima svetskih i naših naučnika iz ove oblasti. Diskutovane su prednosti i nedostaci ovih novih katalizatora u odnosu na  komercijalno zastupljene. Takođe je prikazana uporedna analiza aktivnosti i stabilnosti novih platinskih katalizatora na neugljeničnim nosačima u odnosu na komercijalne.

Zahvalnica
Ovaj rad je finansijski podržalo Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, u okviru ugovora br. 451-03-47/2023-01/ 200053
Literatura
[1] 1 A. Morozan, B. Jousselme and S. Palacin, Low-platinum and platinum-free catalysts for the oxygen reduction reaction at fuel cell cathodes, Energy Environ.Sci., 4(2011) 1238.
[2] H. A.Gasteiger, J.E.Panels, S.G.Yanet,  Dependence of PEM fuel cell performance on catalyst loading,  J. Power Sources 127 (2004) [3] N. R. Elezovic, V. R. Radmilovic and N. V. Krstajic,  Platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications, RSC Adv.,6 (2016) 6788.
[4] Q. Sun, X.H. Li, K.X Wang, T.N. Yea and J.S. Chen, Inorganic Non-carbon Supported Pt Catalysts and Synergetic Effects for Oxygen Reduction Reaction, Energy Environ.Sci., in press (2023).
PB  - Srpska akademija nauka i umetnosti
T2  - Srpska akademija nauka i umetnosti
T1  - Razvoj novih materijala za niskotemperaturne gorivne ćelije-izazovi i perspektive
EP  - 13
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2335
ER  - 

@misc{
author = "Elezović, Nevenka R.",
year = "2023",
abstract = "Razvoj novih katalizatora za niskotemperaturne gorivne ćelije-izazovi i perspektive
Nevenka R. Elezovic1
1 Univerzitet u Beogradu, Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11030 Beograd, Srbija
*adresa za korespondenciju: nelezovici@tmf.bg.ac.rs

Niskotemperaturne gorivne ćelije pripadaju grupi obnovljivih, ekološki prihvatljivih izvora energije. Primena zelenog vodonika kao čistog goriva, dobijenog elektrolizom vode, doprinosi zaštiti životne sredine, dostizanju održivog ekonomskog razvoja i cirkularne ekonomije, kao imperativa u procesu energetske tranzicije sa fosilnih goriva ka obnovljivim izvorima energije. 
U ovom radu će biti dat pregled razvoja novih materijala za katalizatore u reakcijama  redukcije kiseonika i oksidacije vodonika, koje se odbvijaju u niskotemeraturnim vodoničnim gorivnim ćelijama. Naime, današnji komercijalni katalizatori su na bazi platine dispergovane na ugljeničnim nosačima razvijene površine-komercijalno nazvanim Vulkan XC-72 i Ketjen Black. Nedostatak ovih katalizatora je nedovoljna stabilnost, posebno na anodnim potencijalima 1.4 V prema reverzibilnoj vodoničnoj elektrodi,  velika cena platine i još uvek velika masa Pt potrebne za isplativu masovnu komercijalizaciju, posebno za redukciju kiseonika, usled velike prenapetiosti i spore kinetike [1,2]. Razvoj novih katalizatora i nosača na bazi metalnih oksida [3] - titanijuma,  kalaja, wolframa,  kao i drugih neorganskih keramičkih materijala – karbida, nitrida [4] obeležio je poslednjih par decenija u radovima svetskih i naših naučnika iz ove oblasti. Diskutovane su prednosti i nedostaci ovih novih katalizatora u odnosu na  komercijalno zastupljene. Takođe je prikazana uporedna analiza aktivnosti i stabilnosti novih platinskih katalizatora na neugljeničnim nosačima u odnosu na komercijalne.

Zahvalnica
Ovaj rad je finansijski podržalo Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, u okviru ugovora br. 451-03-47/2023-01/ 200053
Literatura
[1] 1 A. Morozan, B. Jousselme and S. Palacin, Low-platinum and platinum-free catalysts for the oxygen reduction reaction at fuel cell cathodes, Energy Environ.Sci., 4(2011) 1238.
[2] H. A.Gasteiger, J.E.Panels, S.G.Yanet,  Dependence of PEM fuel cell performance on catalyst loading,  J. Power Sources 127 (2004) [3] N. R. Elezovic, V. R. Radmilovic and N. V. Krstajic,  Platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications, RSC Adv.,6 (2016) 6788.
[4] Q. Sun, X.H. Li, K.X Wang, T.N. Yea and J.S. Chen, Inorganic Non-carbon Supported Pt Catalysts and Synergetic Effects for Oxygen Reduction Reaction, Energy Environ.Sci., in press (2023).",
publisher = "Srpska akademija nauka i umetnosti",
journal = "Srpska akademija nauka i umetnosti",
title = "Razvoj novih materijala za niskotemperaturne gorivne ćelije-izazovi i perspektive",
pages = "13",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2335"
}

Elezović, N. R.. (2023). Razvoj novih materijala za niskotemperaturne gorivne ćelije-izazovi i perspektive. in Srpska akademija nauka i umetnosti
Srpska akademija nauka i umetnosti..
https://hdl.handle.net/21.15107/rcub_rimsi_2335

Elezović NR. Razvoj novih materijala za niskotemperaturne gorivne ćelije-izazovi i perspektive. in Srpska akademija nauka i umetnosti. 2023;:null-13.
https://hdl.handle.net/21.15107/rcub_rimsi_2335 .

Elezović, Nevenka R., "Razvoj novih materijala za niskotemperaturne gorivne ćelije-izazovi i perspektive" in Srpska akademija nauka i umetnosti (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2335 .

TY  - GEN
AU  - Elezović, Nevenka R.
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2327
AB  - Green Hydrogen Renewable Energy Based Society for Sustainable Economic Development-Challenges and Perspectives
Nevenka R. Elezovic
University of Belgrade – Institute for Multidisciplinary Research, Center of Excellence for Green Technologies, Kneza Viseslava 1, 11000 Belgrade, Serbia
Email: nelezovic@tmf.bg.ac.rs, corresponding author  
The contemporary industry is mainly based on fossil fuels to be exhausted in near future. It causes environment pollution and greenhouse effect. During the last century the CO2 concentration increased 20%, raising average temperature on Earth. It means undesirable climate changes, biodiversity disorder and natural disasters. The development of alternative power sources is needed.
United Nations had recognized problem and global actions have already taken. European Union established main targets until 2030- Climate and Energy Package. The Paris Agreement (2015) adopted by 196 Parties from all over the world facilitated low-carbon solutions. Zero-carbon solutions are increasing in economy, especially the power and transport sectors. 
˝The global climate fight will be won or lost in this crucial decade – on our watch. So let’s fight together– and let's win˝ (A. Guterres, UN General Secretary-November 2022).
Thus, development of hydrogen production and fuel cells as zero-emission technologies is needed, to achieve sustainability and circular economy. Hydrogen is high efficiency and environmental friendly fuel. It is produced by water electrolysis, industrial procedure processed in alkaline solution, at 80oC. The main disadvantage is still high energy consumption (~ 5kWh m-3 H2). The hydrogen fuel is used in fuel cells, while oxidative agent is oxygen from air. Many researchers' efforts were done to make progress in this area during past decades. State-of-the-art catalysts are noble metals (carbon supported Platinum) – still expensive for large-scale commercial use. In this research novel solutions for fuel cells catalysts based on low loading precious metals were investigated. Higher efficiency and durability were achieved if compared to commercial Pt/C. Comparative study on Platinum and Palladium based catalysts was presented.  Challenges and perspectives were discussed in terms of technological, social and financial issues. Trading and prices of noble metals were discussed, as well.
Keywords: Renewable energy; Sustainable economic development; Hydrogen production; Fuel cells;, Zero-emission.
PB  - European Institute for Research and Development
T2  - Istanbul Annual International Multidisciplinary Conference on Economics, Business, Technology and Social Sciences
T1  - Green Hydrogen Renewable Energy Based Society for Sustainable Economic Development-Challenges and Perspectives
EP  - 10
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2327
ER  - 

@misc{
author = "Elezović, Nevenka R.",
year = "2023",
abstract = "Green Hydrogen Renewable Energy Based Society for Sustainable Economic Development-Challenges and Perspectives
Nevenka R. Elezovic
University of Belgrade – Institute for Multidisciplinary Research, Center of Excellence for Green Technologies, Kneza Viseslava 1, 11000 Belgrade, Serbia
Email: nelezovic@tmf.bg.ac.rs, corresponding author  
The contemporary industry is mainly based on fossil fuels to be exhausted in near future. It causes environment pollution and greenhouse effect. During the last century the CO2 concentration increased 20%, raising average temperature on Earth. It means undesirable climate changes, biodiversity disorder and natural disasters. The development of alternative power sources is needed.
United Nations had recognized problem and global actions have already taken. European Union established main targets until 2030- Climate and Energy Package. The Paris Agreement (2015) adopted by 196 Parties from all over the world facilitated low-carbon solutions. Zero-carbon solutions are increasing in economy, especially the power and transport sectors. 
˝The global climate fight will be won or lost in this crucial decade – on our watch. So let’s fight together– and let's win˝ (A. Guterres, UN General Secretary-November 2022).
Thus, development of hydrogen production and fuel cells as zero-emission technologies is needed, to achieve sustainability and circular economy. Hydrogen is high efficiency and environmental friendly fuel. It is produced by water electrolysis, industrial procedure processed in alkaline solution, at 80oC. The main disadvantage is still high energy consumption (~ 5kWh m-3 H2). The hydrogen fuel is used in fuel cells, while oxidative agent is oxygen from air. Many researchers' efforts were done to make progress in this area during past decades. State-of-the-art catalysts are noble metals (carbon supported Platinum) – still expensive for large-scale commercial use. In this research novel solutions for fuel cells catalysts based on low loading precious metals were investigated. Higher efficiency and durability were achieved if compared to commercial Pt/C. Comparative study on Platinum and Palladium based catalysts was presented.  Challenges and perspectives were discussed in terms of technological, social and financial issues. Trading and prices of noble metals were discussed, as well.
Keywords: Renewable energy; Sustainable economic development; Hydrogen production; Fuel cells;, Zero-emission.",
publisher = "European Institute for Research and Development",
journal = "Istanbul Annual International Multidisciplinary Conference on Economics, Business, Technology and Social Sciences",
title = "Green Hydrogen Renewable Energy Based Society for Sustainable Economic Development-Challenges and Perspectives",
pages = "10",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2327"
}

Elezović, N. R.. (2023). Green Hydrogen Renewable Energy Based Society for Sustainable Economic Development-Challenges and Perspectives. in Istanbul Annual International Multidisciplinary Conference on Economics, Business, Technology and Social Sciences
European Institute for Research and Development..
https://hdl.handle.net/21.15107/rcub_rimsi_2327

Elezović NR. Green Hydrogen Renewable Energy Based Society for Sustainable Economic Development-Challenges and Perspectives. in Istanbul Annual International Multidisciplinary Conference on Economics, Business, Technology and Social Sciences. 2023;:null-10.
https://hdl.handle.net/21.15107/rcub_rimsi_2327 .

Elezović, Nevenka R., "Green Hydrogen Renewable Energy Based Society for Sustainable Economic Development-Challenges and Perspectives" in Istanbul Annual International Multidisciplinary Conference on Economics, Business, Technology and Social Sciences (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2327 .

TY  - JOUR
AU  - Petričević, Aleksandar
AU  - Jović, Vladimir D
AU  - Krstajic Pajic, Mila
AU  - Marzec, M.
AU  - Gajevska, M.
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka R.
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2341
AB  - The oxygen reduction reaction was investigated at 10 monolayers (MLs) of Pt electrodeposited on (Nb–Ti)2AlC substrate. Following the discussion of detailed kinetics and electrodeposition optimisation in the authors’ previous paper, the focus of this research was on stability testing. Previously performed optimisation results showed the best activity shown by 10 monolayers of Pt. Catalyst characterisation was performed by scanning electron microscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. SEM, EDS and XPS analysis showed that the surface was covered with a homogeneous layer of Pt. TEM analysis of a cross-section confirmed the presence of Pt layer of thickness ∼3.5 nm, corresponding to the 10 MLs of Pt. Although the mass activity for the ORR at 0.8 V vs. RHE of 37.4 A g−1 was comparable with the best one for the Pt/C benchmark, US Department of Energy Protocols revealed excellent catalyst stability – the loss of electrochemically active surface area (EASA) was found to be only 9.3%.
PB  - Taylor and Francis
T2  - Transactions of the IMF
T1  - Ultra-low Pt loading catalyst on (Nb–Ti)2AlC support as advanced material for low-temperature fuel cell application
DO  - 10.1080/00202967.2023.2281806
ER  - 

@article{
author = "Petričević, Aleksandar and Jović, Vladimir D and Krstajic Pajic, Mila and Marzec, M. and Gajevska, M. and Zabinski, Piotr and Elezović, Nevenka R.",
year = "2023",
abstract = "The oxygen reduction reaction was investigated at 10 monolayers (MLs) of Pt electrodeposited on (Nb–Ti)2AlC substrate. Following the discussion of detailed kinetics and electrodeposition optimisation in the authors’ previous paper, the focus of this research was on stability testing. Previously performed optimisation results showed the best activity shown by 10 monolayers of Pt. Catalyst characterisation was performed by scanning electron microscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. SEM, EDS and XPS analysis showed that the surface was covered with a homogeneous layer of Pt. TEM analysis of a cross-section confirmed the presence of Pt layer of thickness ∼3.5 nm, corresponding to the 10 MLs of Pt. Although the mass activity for the ORR at 0.8 V vs. RHE of 37.4 A g−1 was comparable with the best one for the Pt/C benchmark, US Department of Energy Protocols revealed excellent catalyst stability – the loss of electrochemically active surface area (EASA) was found to be only 9.3%.",
publisher = "Taylor and Francis",
journal = "Transactions of the IMF",
title = "Ultra-low Pt loading catalyst on (Nb–Ti)2AlC support as advanced material for low-temperature fuel cell application",
doi = "10.1080/00202967.2023.2281806"
}

Petričević, A., Jović, V. D., Krstajic Pajic, M., Marzec, M., Gajevska, M., Zabinski, P.,& Elezović, N. R.. (2023). Ultra-low Pt loading catalyst on (Nb–Ti)2AlC support as advanced material for low-temperature fuel cell application. in Transactions of the IMF
Taylor and Francis..
https://doi.org/10.1080/00202967.2023.2281806

Petričević A, Jović VD, Krstajic Pajic M, Marzec M, Gajevska M, Zabinski P, Elezović NR. Ultra-low Pt loading catalyst on (Nb–Ti)2AlC support as advanced material for low-temperature fuel cell application. in Transactions of the IMF. 2023;.
doi:10.1080/00202967.2023.2281806 .

Petričević, Aleksandar, Jović, Vladimir D, Krstajic Pajic, Mila, Marzec, M., Gajevska, M., Zabinski, Piotr, Elezović, Nevenka R., "Ultra-low Pt loading catalyst on (Nb–Ti)2AlC support as advanced material for low-temperature fuel cell application" in Transactions of the IMF (2023),
https://doi.org/10.1080/00202967.2023.2281806 . .

TY  - GEN
AU  - Elezović, Nevenka R.
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2324
AB  - Carbon free supported noble metal nanostructures for green energy production-challenges and perspectives

Nevenka R. Elezovic
University of Belgrade Institute for Multidisciplinary Research- Centre of Excellence for Green Technologies
Serbia, e-mail: nelezovic@tmf.bg.ac.rs

Abstract: Statement of the problem: The contemporary industrial processes, as well as transportation vehicles power are based on fossil fuels usage. Intensive fossil fuel application leads to the growing environment pollution, causing the "greenhouse effect". During the 20th century the CO2 concentration increased about 20%, being the main reason for average temperature increase on Earth. This fact has already caused undesirable climate changes, connected to animal and plants biodiversity disorder, Sea level rise, melting Arctic Sea ice layers, extreme nature disasters. United Nations has recognized environment pollution effects and global actions to prevent it have already been taken. From Stockholm conference held in 1972 and Kyoto in 1997 um to Paris Climate Agreement 2015 United Nations announced several declarations to stabilize gas emission and decrease greenhouse effect. European Union has established main targets until 2050, in the frame of Climate and Energy Package, to increase alternative power sources usage and save environment for future generations.
Thus, the further development of water electrolysis and fuel cells catalysts (the subject of this work), as environmental friendly, green technologies are extremely desirable, to contribute to the environment protection and sustainable development. Hydrogen – high efficiency and environmental friendly fuel, produced by water electrolysis is used in low temperature fuel cells, while oxidative agent is oxygen from air. In this work novel nanostructured materials with noble metal nanoparticles (Pt and Pd) deposited onto carbon free- titanium-oxide based supports have been investigated as the catalysts for fuel cells, promising alternative power sources. Several ceramic supports were prepared – non-stoichiometric oxides -Ebonex, Nb or Ru doped titanium oxide nanoparticles, as well as titanium oxide nanotubes supports. Physical-chemical and electrochemical characterization of these novel materials confirmed  higher efficiency and long term stability to decrease the costs and increase life time of fuel cells acceptable for commercial application.

What will audience learn from your presentation? 
•	The audience will learn about state of the art in renewable, environmental friendly  hydrogen energy production and application, as well as progress is being made beyond state of the art;
•	The consciousness and alert will be arisen: what to do and how, to make our planet sustainable and leave better environment for the future generations;
•	The audience will learn about scientific efforts and directions to change the existing fossil fuel based energy world causing undesirable climate changes, to future environmental friendly power sources.
•	Finally, some environmental friendly energy solutions, that we have been working in for years, will be given and future research directions to clean energy world. 
 
Biography: Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests include: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis application - green energy production. Since 2013 she is served as representative of Serbia and member of the European board in European Academy of Surface Technology,
http://www.east-site.net. 	
She has published more than 40 papers in reputed peer reviewed journals of eminent Publishers such as Elsevier, Royal Society of Chemistry, The Electrochemical Society and more than 70 conference papers. She has been serving as a reviewer for: Energy and Environmental Science, Applied Materials and Interfaces, Journal of Materials Chemistry A, Electrochimica Acta, Applied Catalysis B: Environmental, RSC Advances, PCCP, Chemical Communications, Journal of the Electrochemical Society, International Journal of Hydrogen Energy, as well as adjudicative (senior) reviewer for Energy and Environmental Science, Journal of Materials Chemistry A and Physical Chemistry Chemical Physics. She has given numerous invited lectures at the International conferences, recently at International Summit on Conventional and Sustainable Energies, March 30-31, 2018 Orlando, Florida, USA,  Global Experts Meeting on Frontiers in Green Energy and Expo, October 14-16, 2019 Rome, Italy and Materials, the Building Block for the Future 3rd AAAFM-UCLA conference, August 18-20 2021.
Web page:
             http://www.imsi.bg.ac.rs/en/researchers/nevenka-r-elezovic
           
             Email: nelezovic@tmf.bg.ac.rs. elezovic@imsi.rs
Details of presenting author to be mentioned in certificate:
Name: Nevenka R. Elezovic
Affiliation:                   University of Belgrade Institute for Multidisciplinary Research - Centre of Excellence for Green Technologies, Serbia,
Country: Serbia

Other Details:
Presentation Category: Keynote lecture 
Session Name: Renewable Energy to Mitigate Climate Change
Email: nelezovic@tmf.bg.ac.rs
Alternative email: elezovic@imsi.rs
Contact Number: +381641151967
Twitter/Facebook/LinkedIn: Nevenka Elezovic 
Suggestion of speakers to be invited: Names and email address of your colleagues or friends interested to attend Climate Change 2022.
PB  - Magnus Group LLC 150 South Wacker Drive #2400 Chicago, IL 60606, USA
T2  - Euro‐Global Climate Change Conference
T1  - Carbon free supported noble metal nanostructures for green energy production – challenges and perspectives
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2324
ER  - 

@misc{
author = "Elezović, Nevenka R.",
year = "2022",
abstract = "Carbon free supported noble metal nanostructures for green energy production-challenges and perspectives

Nevenka R. Elezovic
University of Belgrade Institute for Multidisciplinary Research- Centre of Excellence for Green Technologies
Serbia, e-mail: nelezovic@tmf.bg.ac.rs

Abstract: Statement of the problem: The contemporary industrial processes, as well as transportation vehicles power are based on fossil fuels usage. Intensive fossil fuel application leads to the growing environment pollution, causing the "greenhouse effect". During the 20th century the CO2 concentration increased about 20%, being the main reason for average temperature increase on Earth. This fact has already caused undesirable climate changes, connected to animal and plants biodiversity disorder, Sea level rise, melting Arctic Sea ice layers, extreme nature disasters. United Nations has recognized environment pollution effects and global actions to prevent it have already been taken. From Stockholm conference held in 1972 and Kyoto in 1997 um to Paris Climate Agreement 2015 United Nations announced several declarations to stabilize gas emission and decrease greenhouse effect. European Union has established main targets until 2050, in the frame of Climate and Energy Package, to increase alternative power sources usage and save environment for future generations.
Thus, the further development of water electrolysis and fuel cells catalysts (the subject of this work), as environmental friendly, green technologies are extremely desirable, to contribute to the environment protection and sustainable development. Hydrogen – high efficiency and environmental friendly fuel, produced by water electrolysis is used in low temperature fuel cells, while oxidative agent is oxygen from air. In this work novel nanostructured materials with noble metal nanoparticles (Pt and Pd) deposited onto carbon free- titanium-oxide based supports have been investigated as the catalysts for fuel cells, promising alternative power sources. Several ceramic supports were prepared – non-stoichiometric oxides -Ebonex, Nb or Ru doped titanium oxide nanoparticles, as well as titanium oxide nanotubes supports. Physical-chemical and electrochemical characterization of these novel materials confirmed  higher efficiency and long term stability to decrease the costs and increase life time of fuel cells acceptable for commercial application.

What will audience learn from your presentation? 
•	The audience will learn about state of the art in renewable, environmental friendly  hydrogen energy production and application, as well as progress is being made beyond state of the art;
•	The consciousness and alert will be arisen: what to do and how, to make our planet sustainable and leave better environment for the future generations;
•	The audience will learn about scientific efforts and directions to change the existing fossil fuel based energy world causing undesirable climate changes, to future environmental friendly power sources.
•	Finally, some environmental friendly energy solutions, that we have been working in for years, will be given and future research directions to clean energy world. 
 
Biography: Dr Nevenka R. Elezovic completed her PhD in 2005, from University of Belgrade. She is currently Research Professor at the Institute for Multidisciplinary Research, University of Belgrade. Her research interests include: Nanostructured materials and alloys for low temperature fuel cells and water electrolysis application - green energy production. Since 2013 she is served as representative of Serbia and member of the European board in European Academy of Surface Technology,
http://www.east-site.net. 	
She has published more than 40 papers in reputed peer reviewed journals of eminent Publishers such as Elsevier, Royal Society of Chemistry, The Electrochemical Society and more than 70 conference papers. She has been serving as a reviewer for: Energy and Environmental Science, Applied Materials and Interfaces, Journal of Materials Chemistry A, Electrochimica Acta, Applied Catalysis B: Environmental, RSC Advances, PCCP, Chemical Communications, Journal of the Electrochemical Society, International Journal of Hydrogen Energy, as well as adjudicative (senior) reviewer for Energy and Environmental Science, Journal of Materials Chemistry A and Physical Chemistry Chemical Physics. She has given numerous invited lectures at the International conferences, recently at International Summit on Conventional and Sustainable Energies, March 30-31, 2018 Orlando, Florida, USA,  Global Experts Meeting on Frontiers in Green Energy and Expo, October 14-16, 2019 Rome, Italy and Materials, the Building Block for the Future 3rd AAAFM-UCLA conference, August 18-20 2021.
Web page:
             http://www.imsi.bg.ac.rs/en/researchers/nevenka-r-elezovic
           
             Email: nelezovic@tmf.bg.ac.rs. elezovic@imsi.rs
Details of presenting author to be mentioned in certificate:
Name: Nevenka R. Elezovic
Affiliation:                   University of Belgrade Institute for Multidisciplinary Research - Centre of Excellence for Green Technologies, Serbia,
Country: Serbia

Other Details:
Presentation Category: Keynote lecture 
Session Name: Renewable Energy to Mitigate Climate Change
Email: nelezovic@tmf.bg.ac.rs
Alternative email: elezovic@imsi.rs
Contact Number: +381641151967
Twitter/Facebook/LinkedIn: Nevenka Elezovic 
Suggestion of speakers to be invited: Names and email address of your colleagues or friends interested to attend Climate Change 2022.",
publisher = "Magnus Group LLC 150 South Wacker Drive #2400 Chicago, IL 60606, USA",
journal = "Euro‐Global Climate Change Conference",
title = "Carbon free supported noble metal nanostructures for green energy production – challenges and perspectives",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2324"
}

Elezović, N. R.. (2022). Carbon free supported noble metal nanostructures for green energy production – challenges and perspectives. in Euro‐Global Climate Change Conference
Magnus Group LLC 150 South Wacker Drive #2400 Chicago, IL 60606, USA..
https://hdl.handle.net/21.15107/rcub_rimsi_2324

Elezović NR. Carbon free supported noble metal nanostructures for green energy production – challenges and perspectives. in Euro‐Global Climate Change Conference. 2022;.
https://hdl.handle.net/21.15107/rcub_rimsi_2324 .

Elezović, Nevenka R., "Carbon free supported noble metal nanostructures for green energy production – challenges and perspectives" in Euro‐Global Climate Change Conference (2022),
https://hdl.handle.net/21.15107/rcub_rimsi_2324 .

TY  - GEN
AU  - Elezović, Nevenka R.
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2332
AB  - Platinum layers on MAX phases based supports as advanced materials for low temperature fuel cells application
NEVENKA R. ELEZOVIC*
*University of Belgrade - Institute for Multidisciplinary Research, Kneza Viseslava 1, 11030 Belgrade, Serbia


Proton exchange membrane fuel cells (PEMFCs) are considered as promising future environmental friendly power sources. However, before the commercialization some important issues have to be resolved. MAX phase materials, such as Ti2AlC or (Nb-Ti)2AlC have been considered as perspective materials for variety of applications. These materials demonstrated high chemical and corrosion stability, high conductivity – close to metals′ one, as well as excellent stability in a wide potential range when used for electrochemical systems in water solutions. Moreover, commercialization was achieved at a very reasonable price. Thus, above mentioned materials could be promising alternative for catalyst supports in PEMFCs if compared to state-of-the-art carbon based materials. On the other hand, platinum is considered as the best catalyst for both anode and cathode reactions taking place in PEMFCs: hydrogen oxidation and oxygen reduction, especially in acid solutions. Having in mind the high cost and scarcity of Pt, deposition of ultrathin Pt layers on Max phases could be of great practical importance. In this research a facile and cost effective electrochemical method for successful deposition of thin Pt films (up to 10 monolayers) onto Ti2AlC and (Nb-Ti)2AlC substrate was referred.  The obtained catalysts were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscpopy (EDS), and X-ray photoelectron spectroscopy (XPS). The oxygen reduction and hydrogen oxidation reactions were investigated by linear sweep voltammetry at rotating disc electrode (RDE). The results confirmed high activity and excellent stability in comparison to commercial carbon based Pt catalyst. Challenges and perspectives of these novel materials for green energy application have been discussed.
Acknowledgements: This work was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Contract No. 451-03-68/2022-14/200053. The authors would like to thank Prof. M. Barsoum, Drexel University Philadelphia, PA 19104 USA, for Max phase substrates preparation.
PB  - Pangea Global Events 16192 Coastal Highway, Lewes, Delaware 19958-9776
T2  - , Global Conference on Materials Science and Engineering
T1  - Platinum layers on MAX phases based supports as advanced materials for low temperature fuel cells application
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2332
ER  - 

@misc{
author = "Elezović, Nevenka R.",
year = "2022",
abstract = "Platinum layers on MAX phases based supports as advanced materials for low temperature fuel cells application
NEVENKA R. ELEZOVIC*
*University of Belgrade - Institute for Multidisciplinary Research, Kneza Viseslava 1, 11030 Belgrade, Serbia


Proton exchange membrane fuel cells (PEMFCs) are considered as promising future environmental friendly power sources. However, before the commercialization some important issues have to be resolved. MAX phase materials, such as Ti2AlC or (Nb-Ti)2AlC have been considered as perspective materials for variety of applications. These materials demonstrated high chemical and corrosion stability, high conductivity – close to metals′ one, as well as excellent stability in a wide potential range when used for electrochemical systems in water solutions. Moreover, commercialization was achieved at a very reasonable price. Thus, above mentioned materials could be promising alternative for catalyst supports in PEMFCs if compared to state-of-the-art carbon based materials. On the other hand, platinum is considered as the best catalyst for both anode and cathode reactions taking place in PEMFCs: hydrogen oxidation and oxygen reduction, especially in acid solutions. Having in mind the high cost and scarcity of Pt, deposition of ultrathin Pt layers on Max phases could be of great practical importance. In this research a facile and cost effective electrochemical method for successful deposition of thin Pt films (up to 10 monolayers) onto Ti2AlC and (Nb-Ti)2AlC substrate was referred.  The obtained catalysts were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscpopy (EDS), and X-ray photoelectron spectroscopy (XPS). The oxygen reduction and hydrogen oxidation reactions were investigated by linear sweep voltammetry at rotating disc electrode (RDE). The results confirmed high activity and excellent stability in comparison to commercial carbon based Pt catalyst. Challenges and perspectives of these novel materials for green energy application have been discussed.
Acknowledgements: This work was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Contract No. 451-03-68/2022-14/200053. The authors would like to thank Prof. M. Barsoum, Drexel University Philadelphia, PA 19104 USA, for Max phase substrates preparation.",
publisher = "Pangea Global Events 16192 Coastal Highway, Lewes, Delaware 19958-9776",
journal = ", Global Conference on Materials Science and Engineering",
title = "Platinum layers on MAX phases based supports as advanced materials for low temperature fuel cells application",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2332"
}

Elezović, N. R.. (2022). Platinum layers on MAX phases based supports as advanced materials for low temperature fuel cells application. in , Global Conference on Materials Science and Engineering
Pangea Global Events 16192 Coastal Highway, Lewes, Delaware 19958-9776..
https://hdl.handle.net/21.15107/rcub_rimsi_2332

Elezović NR. Platinum layers on MAX phases based supports as advanced materials for low temperature fuel cells application. in , Global Conference on Materials Science and Engineering. 2022;.
https://hdl.handle.net/21.15107/rcub_rimsi_2332 .

Elezović, Nevenka R., "Platinum layers on MAX phases based supports as advanced materials for low temperature fuel cells application" in , Global Conference on Materials Science and Engineering (2022),
https://hdl.handle.net/21.15107/rcub_rimsi_2332 .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Zabinski, P.
AU  - Lačnjevac, Uroš
AU  - Krstajic-Pajic, M. N.
AU  - Jović, Vladimir D
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1429
AB  - Two types of iridium oxide films formed at the Ti-2 AlC substrate were investigated: (1) anodically electrodeposited iridium oxide film from the solution based on IrCl(3)xH(2)O; (2) iridium oxide film prepared by cycling thin layer of electrodeposited Ir in the 0.5 M H2SO4 from - 0.25 to 1.20 V. It was shown that during anodic electrodeposition of iridium oxide film (1) coulombic efficiency decreases with increasing anodic potential, being only 3% atE = 0.7 V vs. SCE and 26% atE = 0.62 V vs. SCE. A pair of peaks corresponding to the transition Ir(III)-oxide/Ir(IV)-oxide was present on the CVs recorded in 0.5 M H2SO4. While cycling pure Ir thin layer in the solution of 0.5 M H2SO4 from - 0.25 to 1.20 V (2) up to 100 cycles, typical CV response was characterized with the prepeak and a pair of peaks corresponding to the Ir(III)/Ir(IV)-oxide transition. With the increase of cycles number to 150, additional peak at potential of 1.0 V appeared. This peak was formed on the account of pair of peaks corresponding to the Ir(III)/Ir(IV)-oxide transition. The oxygen evolution reaction (OER) was investigated at both iridium oxide films. It was shown that the Tafel slope for the OER was similar to 40 mV dec(-1)for the first polarization curve, confirming that the rds was a reaction S-OH -> S-O-ads + H++ e(-). As the number of recorded polarization curves increased, the activity of both types of iridium oxide films decreased, due to dissolution of iridium oxide films at the potentials of the OER. It is shown that anodically electrodeposited iridium oxide film is more active for the OER than that obtained by cycling electrodeposited iridium layer. However, both iridium oxide films exhibited insufficient stability.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Electrochemical deposition and characterization of iridium oxide films on Ti2AlC support for oxygen evolution reaction
EP  - 363
IS  - 1
SP  - 351
VL  - 25
DO  - 10.1007/s10008-020-04816-7
ER  - 

@article{
author = "Elezović, Nevenka R. and Zabinski, P. and Lačnjevac, Uroš and Krstajic-Pajic, M. N. and Jović, Vladimir D",
year = "2021",
abstract = "Two types of iridium oxide films formed at the Ti-2 AlC substrate were investigated: (1) anodically electrodeposited iridium oxide film from the solution based on IrCl(3)xH(2)O; (2) iridium oxide film prepared by cycling thin layer of electrodeposited Ir in the 0.5 M H2SO4 from - 0.25 to 1.20 V. It was shown that during anodic electrodeposition of iridium oxide film (1) coulombic efficiency decreases with increasing anodic potential, being only 3% atE = 0.7 V vs. SCE and 26% atE = 0.62 V vs. SCE. A pair of peaks corresponding to the transition Ir(III)-oxide/Ir(IV)-oxide was present on the CVs recorded in 0.5 M H2SO4. While cycling pure Ir thin layer in the solution of 0.5 M H2SO4 from - 0.25 to 1.20 V (2) up to 100 cycles, typical CV response was characterized with the prepeak and a pair of peaks corresponding to the Ir(III)/Ir(IV)-oxide transition. With the increase of cycles number to 150, additional peak at potential of 1.0 V appeared. This peak was formed on the account of pair of peaks corresponding to the Ir(III)/Ir(IV)-oxide transition. The oxygen evolution reaction (OER) was investigated at both iridium oxide films. It was shown that the Tafel slope for the OER was similar to 40 mV dec(-1)for the first polarization curve, confirming that the rds was a reaction S-OH -> S-O-ads + H++ e(-). As the number of recorded polarization curves increased, the activity of both types of iridium oxide films decreased, due to dissolution of iridium oxide films at the potentials of the OER. It is shown that anodically electrodeposited iridium oxide film is more active for the OER than that obtained by cycling electrodeposited iridium layer. However, both iridium oxide films exhibited insufficient stability.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Electrochemical deposition and characterization of iridium oxide films on Ti2AlC support for oxygen evolution reaction",
pages = "363-351",
number = "1",
volume = "25",
doi = "10.1007/s10008-020-04816-7"
}

Elezović, N. R., Zabinski, P., Lačnjevac, U., Krstajic-Pajic, M. N.,& Jović, V. D.. (2021). Electrochemical deposition and characterization of iridium oxide films on Ti2AlC support for oxygen evolution reaction. in Journal of Solid State Electrochemistry
Springer, New York., 25(1), 351-363.
https://doi.org/10.1007/s10008-020-04816-7

Elezović NR, Zabinski P, Lačnjevac U, Krstajic-Pajic MN, Jović VD. Electrochemical deposition and characterization of iridium oxide films on Ti2AlC support for oxygen evolution reaction. in Journal of Solid State Electrochemistry. 2021;25(1):351-363.
doi:10.1007/s10008-020-04816-7 .

Elezović, Nevenka R., Zabinski, P., Lačnjevac, Uroš, Krstajic-Pajic, M. N., Jović, Vladimir D, "Electrochemical deposition and characterization of iridium oxide films on Ti2AlC support for oxygen evolution reaction" in Journal of Solid State Electrochemistry, 25, no. 1 (2021):351-363,
https://doi.org/10.1007/s10008-020-04816-7 . .

TY  - JOUR
AU  - Elezović, Nevenka R.
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1487
PB  - Taylor & Francis Ltd, Abingdon
T2  - Transactions of the Institute of Metal Finishing
T1  - 71st Annual Meeting of the International Society of Electrochemistry, Belgrade Online 2020-a great contribution from EAST European board members
EP  - 54
IS  - 2
SP  - 53
VL  - 99
DO  - 10.1080/00202967.2021.1877485
ER  - 

@article{
author = "Elezović, Nevenka R.",
year = "2021",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Transactions of the Institute of Metal Finishing",
title = "71st Annual Meeting of the International Society of Electrochemistry, Belgrade Online 2020-a great contribution from EAST European board members",
pages = "54-53",
number = "2",
volume = "99",
doi = "10.1080/00202967.2021.1877485"
}

Elezović, N. R.. (2021). 71st Annual Meeting of the International Society of Electrochemistry, Belgrade Online 2020-a great contribution from EAST European board members. in Transactions of the Institute of Metal Finishing
Taylor & Francis Ltd, Abingdon., 99(2), 53-54.
https://doi.org/10.1080/00202967.2021.1877485

Elezović NR. 71st Annual Meeting of the International Society of Electrochemistry, Belgrade Online 2020-a great contribution from EAST European board members. in Transactions of the Institute of Metal Finishing. 2021;99(2):53-54.
doi:10.1080/00202967.2021.1877485 .

Elezović, Nevenka R., "71st Annual Meeting of the International Society of Electrochemistry, Belgrade Online 2020-a great contribution from EAST European board members" in Transactions of the Institute of Metal Finishing, 99, no. 2 (2021):53-54,
https://doi.org/10.1080/00202967.2021.1877485 . .

TY  - JOUR
AU  - Lačnjevac, Uroš
AU  - Vasilic, Rastko
AU  - Dobrota, Ana
AU  - Durdic, Sladana
AU  - Tomanec, Ondrej
AU  - Zboril, Radek
AU  - Mohajernia, Shiva
AU  - Nhat, Truong Nguyen
AU  - Skorodumova, Natalia
AU  - Manojlović, Dragan
AU  - Elezović, Nevenka R.
AU  - Pasti, Igor
AU  - Schmuki, Patrik
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1373
AB  - Developing ultraefficient electrocatalytic materials for the hydrogen evolution reaction (HER) with low content of expensive platinum group metals (PGMs) via low-energy-input procedures is the key to the successful commercialization of green water electrolysis technologies for sustainable production of high-purity hydrogen. In this study, we report a facile room-temperature synthesis of ultrafine metallic Ir nanoparticles on conductive, proton-intercalated TiO2 nanotube (H-TNT) arrays via galvanic displacement. A series of experiments demonstrate that a controlled transformation of the H-TNT surface microstructure from neat open-top tubes to disordered nanostripe bundles ("nanograss") is highly beneficial for providing an abundance of exposed Ir active sites. Consequently, for nanograss-engineered composites, outstanding HER activity metrics are achieved even at very low Ir(iii) precursor concentrations. An optimum Ir"TNT cathode loaded with 5.7 mu g(Ir) cm(-2) exhibits an overpotential of -63 mV at -100 mA cm(-2) and a mass activity of 34 A mg(Ir)(-1) at -80 mV under acidic conditions, along with excellent catalytic durability and structural integrity. Density functional theory (DFT) simulations reveal that the hydrogen-rich TiO2 surface not only stabilizes the deposited Ir and weakens its H binding strength to a moderate intensity, but also actively takes part in the HER mechanism by refreshing the Ir catalytic sites near the Ir|H-TiO2 interface, thus substantially promoting H-2 generation. The comprehensive characterization combined with theory provides an in-depth understanding of the electrocatalytic behavior of H-TNT supported PGM nanoparticles and demonstrates their high potential as competitive electrocatalyst systems for the HER.
PB  - Royal Soc Chemistry, Cambridge
T2  - Journal of Materials Chemistry A
T1  - High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles
EP  - 22790
IS  - 43
SP  - 22773
VL  - 8
DO  - 10.1039/d0ta07492f
ER  - 

@article{
author = "Lačnjevac, Uroš and Vasilic, Rastko and Dobrota, Ana and Durdic, Sladana and Tomanec, Ondrej and Zboril, Radek and Mohajernia, Shiva and Nhat, Truong Nguyen and Skorodumova, Natalia and Manojlović, Dragan and Elezović, Nevenka R. and Pasti, Igor and Schmuki, Patrik",
year = "2020",
abstract = "Developing ultraefficient electrocatalytic materials for the hydrogen evolution reaction (HER) with low content of expensive platinum group metals (PGMs) via low-energy-input procedures is the key to the successful commercialization of green water electrolysis technologies for sustainable production of high-purity hydrogen. In this study, we report a facile room-temperature synthesis of ultrafine metallic Ir nanoparticles on conductive, proton-intercalated TiO2 nanotube (H-TNT) arrays via galvanic displacement. A series of experiments demonstrate that a controlled transformation of the H-TNT surface microstructure from neat open-top tubes to disordered nanostripe bundles ("nanograss") is highly beneficial for providing an abundance of exposed Ir active sites. Consequently, for nanograss-engineered composites, outstanding HER activity metrics are achieved even at very low Ir(iii) precursor concentrations. An optimum Ir"TNT cathode loaded with 5.7 mu g(Ir) cm(-2) exhibits an overpotential of -63 mV at -100 mA cm(-2) and a mass activity of 34 A mg(Ir)(-1) at -80 mV under acidic conditions, along with excellent catalytic durability and structural integrity. Density functional theory (DFT) simulations reveal that the hydrogen-rich TiO2 surface not only stabilizes the deposited Ir and weakens its H binding strength to a moderate intensity, but also actively takes part in the HER mechanism by refreshing the Ir catalytic sites near the Ir|H-TiO2 interface, thus substantially promoting H-2 generation. The comprehensive characterization combined with theory provides an in-depth understanding of the electrocatalytic behavior of H-TNT supported PGM nanoparticles and demonstrates their high potential as competitive electrocatalyst systems for the HER.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Journal of Materials Chemistry A",
title = "High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles",
pages = "22790-22773",
number = "43",
volume = "8",
doi = "10.1039/d0ta07492f"
}

Lačnjevac, U., Vasilic, R., Dobrota, A., Durdic, S., Tomanec, O., Zboril, R., Mohajernia, S., Nhat, T. N., Skorodumova, N., Manojlović, D., Elezović, N. R., Pasti, I.,& Schmuki, P.. (2020). High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles. in Journal of Materials Chemistry A
Royal Soc Chemistry, Cambridge., 8(43), 22773-22790.
https://doi.org/10.1039/d0ta07492f

Lačnjevac U, Vasilic R, Dobrota A, Durdic S, Tomanec O, Zboril R, Mohajernia S, Nhat TN, Skorodumova N, Manojlović D, Elezović NR, Pasti I, Schmuki P. High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles. in Journal of Materials Chemistry A. 2020;8(43):22773-22790.
doi:10.1039/d0ta07492f .

Lačnjevac, Uroš, Vasilic, Rastko, Dobrota, Ana, Durdic, Sladana, Tomanec, Ondrej, Zboril, Radek, Mohajernia, Shiva, Nhat, Truong Nguyen, Skorodumova, Natalia, Manojlović, Dragan, Elezović, Nevenka R., Pasti, Igor, Schmuki, Patrik, "High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles" in Journal of Materials Chemistry A, 8, no. 43 (2020):22773-22790,
https://doi.org/10.1039/d0ta07492f . .

TY  - JOUR
AU  - Nikolic, Nebojša D.
AU  - Živković, Predrag M.
AU  - Elezović, Nevenka R.
AU  - Lačnjevac, Uroš
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1356
AB  - Formation of the honeycomb-like electrodes of copper by the regime of reversing current (RC) in the second range has been investigated. Morphological and structural characteristics of this electrode type obtained by various parameters of RC regimes were examined by the techniques of scanning electron and optical microscopies, while the amount of hydrogen produced during electrodeposition process was quantified by determination of the average current efficiency for hydrogen evolution reaction. To optimize the process of formation of the honeycomb-like electrodes, the following parameters of square wave RC regimes were analyzed: the cathodic current density, the same anodic to cathodic time ratios but various durations of the cathodic and the anodic pulses, and the various values of the anodic to cathodic time ratios. The minimal amount of hydrogen spent for formation of the honeycomb-like electrodes with maximal number of holes formed from detached hydrogen bubbles is obtained with the anodic to cathodic time ratio of 0.50 and duration of the cathodic and anodic pulses of 2 and 1 s, respectively. To explain formation of the honeycomb-like electrodes of optimal morphological and structural characteristics, the upgraded mathematical model defining the RC regime in the second range was proposed and discussed.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Optimization of process of the honeycomb-like structure formation by the regime of reversing current (RC) in the second range
EP  - 1624
IS  - 7
SP  - 1615
VL  - 24
DO  - 10.1007/s10008-020-04658-3
ER  - 

@article{
author = "Nikolic, Nebojša D. and Živković, Predrag M. and Elezović, Nevenka R. and Lačnjevac, Uroš",
year = "2020",
abstract = "Formation of the honeycomb-like electrodes of copper by the regime of reversing current (RC) in the second range has been investigated. Morphological and structural characteristics of this electrode type obtained by various parameters of RC regimes were examined by the techniques of scanning electron and optical microscopies, while the amount of hydrogen produced during electrodeposition process was quantified by determination of the average current efficiency for hydrogen evolution reaction. To optimize the process of formation of the honeycomb-like electrodes, the following parameters of square wave RC regimes were analyzed: the cathodic current density, the same anodic to cathodic time ratios but various durations of the cathodic and the anodic pulses, and the various values of the anodic to cathodic time ratios. The minimal amount of hydrogen spent for formation of the honeycomb-like electrodes with maximal number of holes formed from detached hydrogen bubbles is obtained with the anodic to cathodic time ratio of 0.50 and duration of the cathodic and anodic pulses of 2 and 1 s, respectively. To explain formation of the honeycomb-like electrodes of optimal morphological and structural characteristics, the upgraded mathematical model defining the RC regime in the second range was proposed and discussed.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Optimization of process of the honeycomb-like structure formation by the regime of reversing current (RC) in the second range",
pages = "1624-1615",
number = "7",
volume = "24",
doi = "10.1007/s10008-020-04658-3"
}

Nikolic, N. D., Živković, P. M., Elezović, N. R.,& Lačnjevac, U.. (2020). Optimization of process of the honeycomb-like structure formation by the regime of reversing current (RC) in the second range. in Journal of Solid State Electrochemistry
Springer, New York., 24(7), 1615-1624.
https://doi.org/10.1007/s10008-020-04658-3

Nikolic ND, Živković PM, Elezović NR, Lačnjevac U. Optimization of process of the honeycomb-like structure formation by the regime of reversing current (RC) in the second range. in Journal of Solid State Electrochemistry. 2020;24(7):1615-1624.
doi:10.1007/s10008-020-04658-3 .

Nikolic, Nebojša D., Živković, Predrag M., Elezović, Nevenka R., Lačnjevac, Uroš, "Optimization of process of the honeycomb-like structure formation by the regime of reversing current (RC) in the second range" in Journal of Solid State Electrochemistry, 24, no. 7 (2020):1615-1624,
https://doi.org/10.1007/s10008-020-04658-3 . .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Branković, Goran
AU  - Zabinski, P.
AU  - Marzec, M.
AU  - Jović, Vladimir D
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1325
AB  - The hydrogen evolution reaction (HER) was investigated in 0.5 M H2SO4 at thin iridium layers electrodeposited on Ti2AlC substrate. Five samples, varying in thickness from 4.5 nm to 255 nm, were electrodeposited from the solution containing K3IrCl6 + Na2SO4. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were applied for morphology and chemical composition analysis. Metallic iridium was detected by X-ray photoelectron spectroscopy (XPS). The HER was investigated by polarization and electrochemical impedance spectroscopy (EIS) measurements. Polarization curves were characterized with the low Tafel slopes -18 mV dec(-1), while at higher current densities increased up to -56 mV dec(-1). The overpotential at j = -0.1 A cm(-2) was-45 mV, while at j = -0.01 A cm(-2) varied from 25.1 mV to 36.1 mV. These novel catalysts exhibited excellent activity, especially under industrial conditions of hydrogen production (j = -0.3 A cm(-2)) the determined overpotentials were between 66 and 69 mV only.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis
VL  - 878
DO  - 10.1016/j.jelechem.2020.114575
ER  - 

@article{
author = "Elezović, Nevenka R. and Branković, Goran and Zabinski, P. and Marzec, M. and Jović, Vladimir D",
year = "2020",
abstract = "The hydrogen evolution reaction (HER) was investigated in 0.5 M H2SO4 at thin iridium layers electrodeposited on Ti2AlC substrate. Five samples, varying in thickness from 4.5 nm to 255 nm, were electrodeposited from the solution containing K3IrCl6 + Na2SO4. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were applied for morphology and chemical composition analysis. Metallic iridium was detected by X-ray photoelectron spectroscopy (XPS). The HER was investigated by polarization and electrochemical impedance spectroscopy (EIS) measurements. Polarization curves were characterized with the low Tafel slopes -18 mV dec(-1), while at higher current densities increased up to -56 mV dec(-1). The overpotential at j = -0.1 A cm(-2) was-45 mV, while at j = -0.01 A cm(-2) varied from 25.1 mV to 36.1 mV. These novel catalysts exhibited excellent activity, especially under industrial conditions of hydrogen production (j = -0.3 A cm(-2)) the determined overpotentials were between 66 and 69 mV only.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis",
volume = "878",
doi = "10.1016/j.jelechem.2020.114575"
}

Elezović, N. R., Branković, G., Zabinski, P., Marzec, M.,& Jović, V. D.. (2020). Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 878.
https://doi.org/10.1016/j.jelechem.2020.114575

Elezović NR, Branković G, Zabinski P, Marzec M, Jović VD. Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis. in Journal of Electroanalytical Chemistry. 2020;878.
doi:10.1016/j.jelechem.2020.114575 .

Elezović, Nevenka R., Branković, Goran, Zabinski, P., Marzec, M., Jović, Vladimir D, "Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis" in Journal of Electroanalytical Chemistry, 878 (2020),
https://doi.org/10.1016/j.jelechem.2020.114575 . .

TY  - JOUR
AU  - Berkesi, Kata
AU  - Živković, Predrag M.
AU  - Elezović, Nevenka R.
AU  - Lačnjevac, Uroš
AU  - Hristoforou, Evangelos
AU  - Nikolic, Nebojša D.
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1257
AB  - Electrodeposition of copper in the hydrogen co-deposition range by the regime of reversing current (RC) in the second range has been investigated by determination of the average current efficiency for hydrogen evolution reaction and by scanning electron (SEM) and optical (OM) microscopic analysis of the obtained deposits. Keeping the cathodic current density, the cathodic and the anodic pulses constant in all experiments, the anodic current density (j(a)) values were varied: 40, 80, 160, 240 and 320 mA cm(-2). The Cu deposits produced by the RC regimes with different anodic current density values were compared with that obtained in a constant galvanostatic regime (DC) at the current density equal to the cathodic current density in the RC regimes. The honeycomb-like structures were formed in the DC regime and by the RC regimes with j(a), of 40 and 80 mA cm(-2). The hole size in them was in the 60-70 mu m range. Due to the decrease of quantity of evolved hydrogen with increasing anodic current density, the larger dish-like holes with dendrites at their bottom and shoulder were formed with j(a) values of 160, 240 and 320 mA cm(-2). The maximum number of holes, and hence, the largest specific surface area of the honeycomb-like electrodes was obtained with j(a) = 80 mA cm(-2), that can be ascribed to a suppression of coalescence of neighboring hydrogen bubbles. Application of the RC regime also led to the increase of uniformity of structures, what is concluded by cross section analysis of the formed honeycomb-like electrodes. For the first time, mechanism of Cu electrodeposition in the hydrogen co-deposition range by the RC regime in the second range was proposed and discussed.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - Mechanism of formation of the honeycomb-like structures by the regime of the reversing current (RC) in the second range
EP  - 410
SP  - 401
VL  - 833
DO  - 10.1016/j.jelechem.2018.12.021
ER  - 

@article{
author = "Berkesi, Kata and Živković, Predrag M. and Elezović, Nevenka R. and Lačnjevac, Uroš and Hristoforou, Evangelos and Nikolic, Nebojša D.",
year = "2019",
abstract = "Electrodeposition of copper in the hydrogen co-deposition range by the regime of reversing current (RC) in the second range has been investigated by determination of the average current efficiency for hydrogen evolution reaction and by scanning electron (SEM) and optical (OM) microscopic analysis of the obtained deposits. Keeping the cathodic current density, the cathodic and the anodic pulses constant in all experiments, the anodic current density (j(a)) values were varied: 40, 80, 160, 240 and 320 mA cm(-2). The Cu deposits produced by the RC regimes with different anodic current density values were compared with that obtained in a constant galvanostatic regime (DC) at the current density equal to the cathodic current density in the RC regimes. The honeycomb-like structures were formed in the DC regime and by the RC regimes with j(a), of 40 and 80 mA cm(-2). The hole size in them was in the 60-70 mu m range. Due to the decrease of quantity of evolved hydrogen with increasing anodic current density, the larger dish-like holes with dendrites at their bottom and shoulder were formed with j(a) values of 160, 240 and 320 mA cm(-2). The maximum number of holes, and hence, the largest specific surface area of the honeycomb-like electrodes was obtained with j(a) = 80 mA cm(-2), that can be ascribed to a suppression of coalescence of neighboring hydrogen bubbles. Application of the RC regime also led to the increase of uniformity of structures, what is concluded by cross section analysis of the formed honeycomb-like electrodes. For the first time, mechanism of Cu electrodeposition in the hydrogen co-deposition range by the RC regime in the second range was proposed and discussed.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Mechanism of formation of the honeycomb-like structures by the regime of the reversing current (RC) in the second range",
pages = "410-401",
volume = "833",
doi = "10.1016/j.jelechem.2018.12.021"
}

Berkesi, K., Živković, P. M., Elezović, N. R., Lačnjevac, U., Hristoforou, E.,& Nikolic, N. D.. (2019). Mechanism of formation of the honeycomb-like structures by the regime of the reversing current (RC) in the second range. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 833, 401-410.
https://doi.org/10.1016/j.jelechem.2018.12.021

Berkesi K, Živković PM, Elezović NR, Lačnjevac U, Hristoforou E, Nikolic ND. Mechanism of formation of the honeycomb-like structures by the regime of the reversing current (RC) in the second range. in Journal of Electroanalytical Chemistry. 2019;833:401-410.
doi:10.1016/j.jelechem.2018.12.021 .

Berkesi, Kata, Živković, Predrag M., Elezović, Nevenka R., Lačnjevac, Uroš, Hristoforou, Evangelos, Nikolic, Nebojša D., "Mechanism of formation of the honeycomb-like structures by the regime of the reversing current (RC) in the second range" in Journal of Electroanalytical Chemistry, 833 (2019):401-410,
https://doi.org/10.1016/j.jelechem.2018.12.021 . .

TY  - JOUR
AU  - Jović, Vladimir D
AU  - Jović, Borka M
AU  - Elezović, Nevenka R.
AU  - Gajić-Krstajić, Ljiljana M
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1249
AB  - The "corrected accelerated service life test for hydrogen evolution reaction" (CASLT-HER), designed for application of certain electrode materials as cathodes in the cell for alkaline water electrolysis in 30 % KOH at 80 degrees C, was performed at electrodeposited NiSn alloy and Ni 40 mesh electrodes. The Ni 40 mesh was slightly etched, while the NiSn alloy coating was electro-deposited from the bath containing pyrophosphate, glycine, SnCl2 and NiCl2 onto Ni 40 mesh to the thickness of approximately 40 mu m. It is shown that the NiSn cathode possess from maximum 0.77 V to minimum 0.30 V better over-potential than the Ni 40 mesh electrode during the 5 years of their exploitation at the conditions of industrial alkaline water electrolysis. It is also shown that both electrodes should be held at j = -0.3 A cm(-2) for at least 5 h in order to establish stable overpotential response. The limiting overpotential values for applying cyclic voltammetry (CVs, to mimic "polarity inversion") should be determined in a separate experiment before the CASLT-HER and should be adjusted during the application of CVs.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Corrected accelerated service life test of electrodeposited NiSn alloys and Ni as cathodes for industrial alkaline water electrolysis
EP  - 1286
IS  - 11
SP  - 1271
VL  - 84
DO  - 10.2298/JSC190515074J
ER  - 

@article{
author = "Jović, Vladimir D and Jović, Borka M and Elezović, Nevenka R. and Gajić-Krstajić, Ljiljana M",
year = "2019",
abstract = "The "corrected accelerated service life test for hydrogen evolution reaction" (CASLT-HER), designed for application of certain electrode materials as cathodes in the cell for alkaline water electrolysis in 30 % KOH at 80 degrees C, was performed at electrodeposited NiSn alloy and Ni 40 mesh electrodes. The Ni 40 mesh was slightly etched, while the NiSn alloy coating was electro-deposited from the bath containing pyrophosphate, glycine, SnCl2 and NiCl2 onto Ni 40 mesh to the thickness of approximately 40 mu m. It is shown that the NiSn cathode possess from maximum 0.77 V to minimum 0.30 V better over-potential than the Ni 40 mesh electrode during the 5 years of their exploitation at the conditions of industrial alkaline water electrolysis. It is also shown that both electrodes should be held at j = -0.3 A cm(-2) for at least 5 h in order to establish stable overpotential response. The limiting overpotential values for applying cyclic voltammetry (CVs, to mimic "polarity inversion") should be determined in a separate experiment before the CASLT-HER and should be adjusted during the application of CVs.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Corrected accelerated service life test of electrodeposited NiSn alloys and Ni as cathodes for industrial alkaline water electrolysis",
pages = "1286-1271",
number = "11",
volume = "84",
doi = "10.2298/JSC190515074J"
}

Jović, V. D., Jović, B. M., Elezović, N. R.,& Gajić-Krstajić, L. M.. (2019). Corrected accelerated service life test of electrodeposited NiSn alloys and Ni as cathodes for industrial alkaline water electrolysis. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 84(11), 1271-1286.
https://doi.org/10.2298/JSC190515074J

Jović VD, Jović BM, Elezović NR, Gajić-Krstajić LM. Corrected accelerated service life test of electrodeposited NiSn alloys and Ni as cathodes for industrial alkaline water electrolysis. in Journal of the Serbian Chemical Society. 2019;84(11):1271-1286.
doi:10.2298/JSC190515074J .

Jović, Vladimir D, Jović, Borka M, Elezović, Nevenka R., Gajić-Krstajić, Ljiljana M, "Corrected accelerated service life test of electrodeposited NiSn alloys and Ni as cathodes for industrial alkaline water electrolysis" in Journal of the Serbian Chemical Society, 84, no. 11 (2019):1271-1286,
https://doi.org/10.2298/JSC190515074J . .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Lović, J. D.
AU  - Jović, Borka M
AU  - Zabinski, P.
AU  - Wloch, Grzegorz
AU  - Jović, Vladimir D
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1207
AB  - The Ag, Pd and AgPd alloys of different morphologies and compositions were electrodeposited onto Au and glassy carbon (GC) disc electrodes from the solution containing 0.001 M PdCl2 + 0.04 M AgCl + 0.1 M HCl + 12 M LiCl under the conditions of non-stationary (RPM = 0, samples AgPd1 and AgPd2) and convective diffusion (RPM = 1000, sample AgPd3). Electrodeposited alloy layers were characterized by the scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Oxygen reduction reaction (ORR) was investigated on all coatings in 0.1 M NaOH solution saturated with oxygen. The j-E curves for the ORR were recorded by two procedures: (1) samples were cycled with 5 mV s(-1) from open circuit potential (OCP) to -0.8 V for Ag and AgPd alloys (or -0.6 V for pure Pd) and back; (2) samples were cycled with 5 mV s(-1) from open circuit potential to 0.45 V (formation of Ag2O, in the case of Pd formation of PdO and PdO2), from 0.45 V to -0.60 V and back to the OCP. Significant catalytic activity for the Ag and AgPd alloys was detected after cycling electrodes in the potential region of Ag2O formation and reduction. Increase of the catalytic activity for AgPd alloys was, for the first time in the literature, ascribed to the presence of a certain amount of Ag2O which could not be completely reduced during the reverse sweep from 0.45 V to -0.6 V. Catalytic activity of AgPd alloys was found to be closely related to the amount of non-reduced Ag2O (most probably in the form of Ag-hydroxide). In the absence of such treatment, the catalytic activity for the ORR on electrodeposited Ag and AgPd alloy coatings was not detected.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application
EP  - 368
SP  - 360
VL  - 307
DO  - 10.1016/j.electacta.2019.03.177
ER  - 

@article{
author = "Elezović, Nevenka R. and Lović, J. D. and Jović, Borka M and Zabinski, P. and Wloch, Grzegorz and Jović, Vladimir D",
year = "2019",
abstract = "The Ag, Pd and AgPd alloys of different morphologies and compositions were electrodeposited onto Au and glassy carbon (GC) disc electrodes from the solution containing 0.001 M PdCl2 + 0.04 M AgCl + 0.1 M HCl + 12 M LiCl under the conditions of non-stationary (RPM = 0, samples AgPd1 and AgPd2) and convective diffusion (RPM = 1000, sample AgPd3). Electrodeposited alloy layers were characterized by the scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Oxygen reduction reaction (ORR) was investigated on all coatings in 0.1 M NaOH solution saturated with oxygen. The j-E curves for the ORR were recorded by two procedures: (1) samples were cycled with 5 mV s(-1) from open circuit potential (OCP) to -0.8 V for Ag and AgPd alloys (or -0.6 V for pure Pd) and back; (2) samples were cycled with 5 mV s(-1) from open circuit potential to 0.45 V (formation of Ag2O, in the case of Pd formation of PdO and PdO2), from 0.45 V to -0.60 V and back to the OCP. Significant catalytic activity for the Ag and AgPd alloys was detected after cycling electrodes in the potential region of Ag2O formation and reduction. Increase of the catalytic activity for AgPd alloys was, for the first time in the literature, ascribed to the presence of a certain amount of Ag2O which could not be completely reduced during the reverse sweep from 0.45 V to -0.6 V. Catalytic activity of AgPd alloys was found to be closely related to the amount of non-reduced Ag2O (most probably in the form of Ag-hydroxide). In the absence of such treatment, the catalytic activity for the ORR on electrodeposited Ag and AgPd alloy coatings was not detected.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application",
pages = "368-360",
volume = "307",
doi = "10.1016/j.electacta.2019.03.177"
}

Elezović, N. R., Lović, J. D., Jović, B. M., Zabinski, P., Wloch, G.,& Jović, V. D.. (2019). Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 307, 360-368.
https://doi.org/10.1016/j.electacta.2019.03.177

Elezović NR, Lović JD, Jović BM, Zabinski P, Wloch G, Jović VD. Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application. in Electrochimica Acta. 2019;307:360-368.
doi:10.1016/j.electacta.2019.03.177 .

Elezović, Nevenka R., Lović, J. D., Jović, Borka M, Zabinski, P., Wloch, Grzegorz, Jović, Vladimir D, "Synthesis and characterization of AgPd alloy coatings as beneficial catalysts for low temperature fuel cells application" in Electrochimica Acta, 307 (2019):360-368,
https://doi.org/10.1016/j.electacta.2019.03.177 . .

TY  - JOUR
AU  - Krstajic-Pajic, M. N.
AU  - Stevanović, Sanja I.
AU  - Radmilović, Velimir R
AU  - Gavrilovic-Wohlmuther, Aleksandra
AU  - Zabinski, P.
AU  - Elezović, Nevenka R.
AU  - Radmilović, Vuk V.
AU  - Gojković, Snežana Lj
AU  - Jovanović, V. M.
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1218
AB  - Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Catalysis B-Environmental
T1  - Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method
EP  - 593
SP  - 585
VL  - 243
DO  - 10.1016/j.apcatb.2018.10.064
ER  - 

@article{
author = "Krstajic-Pajic, M. N. and Stevanović, Sanja I. and Radmilović, Velimir R and Gavrilovic-Wohlmuther, Aleksandra and Zabinski, P. and Elezović, Nevenka R. and Radmilović, Vuk V. and Gojković, Snežana Lj and Jovanović, V. M.",
year = "2019",
abstract = "Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Catalysis B-Environmental",
title = "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method",
pages = "593-585",
volume = "243",
doi = "10.1016/j.apcatb.2018.10.064"
}

Krstajic-Pajic, M. N., Stevanović, S. I., Radmilović, V. R., Gavrilovic-Wohlmuther, A., Zabinski, P., Elezović, N. R., Radmilović, V. V., Gojković, S. L.,& Jovanović, V. M.. (2019). Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental
Elsevier Science Bv, Amsterdam., 243, 585-593.
https://doi.org/10.1016/j.apcatb.2018.10.064

Krstajic-Pajic MN, Stevanović SI, Radmilović VR, Gavrilovic-Wohlmuther A, Zabinski P, Elezović NR, Radmilović VV, Gojković SL, Jovanović VM. Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental. 2019;243:585-593.
doi:10.1016/j.apcatb.2018.10.064 .

Krstajic-Pajic, M. N., Stevanović, Sanja I., Radmilović, Velimir R, Gavrilovic-Wohlmuther, Aleksandra, Zabinski, P., Elezović, Nevenka R., Radmilović, Vuk V., Gojković, Snežana Lj, Jovanović, V. M., "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method" in Applied Catalysis B-Environmental, 243 (2019):585-593,
https://doi.org/10.1016/j.apcatb.2018.10.064 . .

TY  - JOUR
AU  - Lačnjevac, Uroš
AU  - Vasilic, Rastko
AU  - Tokarski, Tomasz
AU  - Cios, Grzegorz
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka R.
AU  - Krstajić, Nedeljko V
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1171
AB  - Noble metal-based materials are inevitable components of cathodes for the hydrogen evolution reaction (HER) in future water electrolysis systems for clean hydrogen fuel production. However, designing active and durable nanostructured catalysts with low amount of costly noble metals is still a great challenge. Herein, we show that Pd nanoparticles (NPs) can be synthesized on the highly developed surface of anodically grown TiO2 nanotube (TNT) arrays by applying a simple galvanic displacement strategy. In a two-step procedure, air-annealed TNT arrays are first cathodically protonated and then partially reoxidized by Pd(II) ions from a PdCl2 solution while providing a scaffold for the metallic Pd deposit. Structural and electrochemical characterizations reveal that the Pd content and the width of the Pd-populated zone of the tube walls are in correlation with the tube length. The Pd"TNT composites display remarkable HER activity in 1 M HClO4 delivering a current density of -10 mA cm(-2) at an overpotential of -38 mV and a Tafel slope of only -13 mV/dec. More impressively, the mass and apparent activity of the Pd"TNTs is superior to even commercial Pt/C at higher current densities. The composites also show stable chronopotentiometric response over 25 h and a negligible HER overpotential increase after potential cycling tests. The exceptional performance of the Pd"TNT cathodes is assigned to the unique semiconducting properties of the three-dimensional, interactive TNT supporting structures that, on the one hand, provide abundance of Pd active sites with optimized atomic hydrogen binding energy for the cathodic HER, but on the other hand, prevent anodic degradation of the Pd catalyst.
PB  - Elsevier Science Bv, Amsterdam
T2  - Nano Energy
T1  - Deposition of Pd nanoparticles on the walls of cathodically hydrogenated TiO2 nanotube arrays via galvanic displacement: A novel route to produce exceptionally active and durable composite electrocatalysts for cost-effective hydrogen evolution
EP  - 538
SP  - 527
VL  - 47
DO  - 10.1016/j.nanoen.2018.03.040
ER  - 

@article{
author = "Lačnjevac, Uroš and Vasilic, Rastko and Tokarski, Tomasz and Cios, Grzegorz and Zabinski, Piotr and Elezović, Nevenka R. and Krstajić, Nedeljko V",
year = "2018",
abstract = "Noble metal-based materials are inevitable components of cathodes for the hydrogen evolution reaction (HER) in future water electrolysis systems for clean hydrogen fuel production. However, designing active and durable nanostructured catalysts with low amount of costly noble metals is still a great challenge. Herein, we show that Pd nanoparticles (NPs) can be synthesized on the highly developed surface of anodically grown TiO2 nanotube (TNT) arrays by applying a simple galvanic displacement strategy. In a two-step procedure, air-annealed TNT arrays are first cathodically protonated and then partially reoxidized by Pd(II) ions from a PdCl2 solution while providing a scaffold for the metallic Pd deposit. Structural and electrochemical characterizations reveal that the Pd content and the width of the Pd-populated zone of the tube walls are in correlation with the tube length. The Pd"TNT composites display remarkable HER activity in 1 M HClO4 delivering a current density of -10 mA cm(-2) at an overpotential of -38 mV and a Tafel slope of only -13 mV/dec. More impressively, the mass and apparent activity of the Pd"TNTs is superior to even commercial Pt/C at higher current densities. The composites also show stable chronopotentiometric response over 25 h and a negligible HER overpotential increase after potential cycling tests. The exceptional performance of the Pd"TNT cathodes is assigned to the unique semiconducting properties of the three-dimensional, interactive TNT supporting structures that, on the one hand, provide abundance of Pd active sites with optimized atomic hydrogen binding energy for the cathodic HER, but on the other hand, prevent anodic degradation of the Pd catalyst.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Nano Energy",
title = "Deposition of Pd nanoparticles on the walls of cathodically hydrogenated TiO2 nanotube arrays via galvanic displacement: A novel route to produce exceptionally active and durable composite electrocatalysts for cost-effective hydrogen evolution",
pages = "538-527",
volume = "47",
doi = "10.1016/j.nanoen.2018.03.040"
}

Lačnjevac, U., Vasilic, R., Tokarski, T., Cios, G., Zabinski, P., Elezović, N. R.,& Krstajić, N. V.. (2018). Deposition of Pd nanoparticles on the walls of cathodically hydrogenated TiO2 nanotube arrays via galvanic displacement: A novel route to produce exceptionally active and durable composite electrocatalysts for cost-effective hydrogen evolution. in Nano Energy
Elsevier Science Bv, Amsterdam., 47, 527-538.
https://doi.org/10.1016/j.nanoen.2018.03.040

Lačnjevac U, Vasilic R, Tokarski T, Cios G, Zabinski P, Elezović NR, Krstajić NV. Deposition of Pd nanoparticles on the walls of cathodically hydrogenated TiO2 nanotube arrays via galvanic displacement: A novel route to produce exceptionally active and durable composite electrocatalysts for cost-effective hydrogen evolution. in Nano Energy. 2018;47:527-538.
doi:10.1016/j.nanoen.2018.03.040 .

Lačnjevac, Uroš, Vasilic, Rastko, Tokarski, Tomasz, Cios, Grzegorz, Zabinski, Piotr, Elezović, Nevenka R., Krstajić, Nedeljko V, "Deposition of Pd nanoparticles on the walls of cathodically hydrogenated TiO2 nanotube arrays via galvanic displacement: A novel route to produce exceptionally active and durable composite electrocatalysts for cost-effective hydrogen evolution" in Nano Energy, 47 (2018):527-538,
https://doi.org/10.1016/j.nanoen.2018.03.040 . .

TY  - JOUR
AU  - Jović, Vladimir D
AU  - Jović, Borka M
AU  - Lačnjevac, Uroš
AU  - Krstajić, Nedeljko V
AU  - Zabinski, P.
AU  - Elezović, Nevenka R.
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1167
AB  - Electrodeposited NiSn alloy coatings onto Ni 40 mesh substrate were tested for application as cathodes and anodes in the cell for alkaline water electrolysis in 30 wt% KOH at 80 degrees C. The "accelerated service life test" (ASLT) was performed for the hydrogen evolution reaction (HER), as well as for the oxygen evolution reaction (OER), and compared to that recorded for the Ni coating (Ni-dep) and Ni-mesh for both reactions. The morphology and chemical compositions of the NiSn and Ni coatings were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS) before and after the ASLT for both reactions, respectively. By measuring the potential at j = 0.3 A cm (-2) it was shown that during the ASLT the NiSn alloy coating catalytic activity for the HER decreases (about 24 mV after 25 cycles), while the catalytic activity for the OER increases (about 50 mV after 25 cycles), so that the cell voltage decreases for about 26 mV. The Ni-dep and Ni-mesh electrodes catalytic activity was found to increase for the HER (for about 103 mV), as well as for the OER (for about 52 mV) during the ASLT. Hence, the cell voltage for the Ni-dep and Ni-mesh electrodes decreased from 2.402 V to 2.245 V during the ASLT, while that for the NiSn electrode decreased from 1.967 V to 1.941 V. The cell voltage saving with the NiSn electrodes amounts to about 435 mV before the ASLT and about 304 mV after the ASLT. SEM results showed that no changes in the morphology of as prepared samples could be detected after the ASLTs for both reactions. EDS analysis confirmed that some changes occurred during the ASLT, particularly for the oxygen content in the surface layer. Similar conclusions were made from the XPS analysis.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - Accelerated service life test of electrodeposited NiSn alloys as bifunctional catalysts for alkaline water electrolysis under industrial operating conditions
EP  - 25
SP  - 16
VL  - 819
DO  - 10.1016/j.jelechem.2017.06.011
ER  - 

@article{
author = "Jović, Vladimir D and Jović, Borka M and Lačnjevac, Uroš and Krstajić, Nedeljko V and Zabinski, P. and Elezović, Nevenka R.",
year = "2018",
abstract = "Electrodeposited NiSn alloy coatings onto Ni 40 mesh substrate were tested for application as cathodes and anodes in the cell for alkaline water electrolysis in 30 wt% KOH at 80 degrees C. The "accelerated service life test" (ASLT) was performed for the hydrogen evolution reaction (HER), as well as for the oxygen evolution reaction (OER), and compared to that recorded for the Ni coating (Ni-dep) and Ni-mesh for both reactions. The morphology and chemical compositions of the NiSn and Ni coatings were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS) before and after the ASLT for both reactions, respectively. By measuring the potential at j = 0.3 A cm (-2) it was shown that during the ASLT the NiSn alloy coating catalytic activity for the HER decreases (about 24 mV after 25 cycles), while the catalytic activity for the OER increases (about 50 mV after 25 cycles), so that the cell voltage decreases for about 26 mV. The Ni-dep and Ni-mesh electrodes catalytic activity was found to increase for the HER (for about 103 mV), as well as for the OER (for about 52 mV) during the ASLT. Hence, the cell voltage for the Ni-dep and Ni-mesh electrodes decreased from 2.402 V to 2.245 V during the ASLT, while that for the NiSn electrode decreased from 1.967 V to 1.941 V. The cell voltage saving with the NiSn electrodes amounts to about 435 mV before the ASLT and about 304 mV after the ASLT. SEM results showed that no changes in the morphology of as prepared samples could be detected after the ASLTs for both reactions. EDS analysis confirmed that some changes occurred during the ASLT, particularly for the oxygen content in the surface layer. Similar conclusions were made from the XPS analysis.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Accelerated service life test of electrodeposited NiSn alloys as bifunctional catalysts for alkaline water electrolysis under industrial operating conditions",
pages = "25-16",
volume = "819",
doi = "10.1016/j.jelechem.2017.06.011"
}

Jović, V. D., Jović, B. M., Lačnjevac, U., Krstajić, N. V., Zabinski, P.,& Elezović, N. R.. (2018). Accelerated service life test of electrodeposited NiSn alloys as bifunctional catalysts for alkaline water electrolysis under industrial operating conditions. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 819, 16-25.
https://doi.org/10.1016/j.jelechem.2017.06.011

Jović VD, Jović BM, Lačnjevac U, Krstajić NV, Zabinski P, Elezović NR. Accelerated service life test of electrodeposited NiSn alloys as bifunctional catalysts for alkaline water electrolysis under industrial operating conditions. in Journal of Electroanalytical Chemistry. 2018;819:16-25.
doi:10.1016/j.jelechem.2017.06.011 .

Jović, Vladimir D, Jović, Borka M, Lačnjevac, Uroš, Krstajić, Nedeljko V, Zabinski, P., Elezović, Nevenka R., "Accelerated service life test of electrodeposited NiSn alloys as bifunctional catalysts for alkaline water electrolysis under industrial operating conditions" in Journal of Electroanalytical Chemistry, 819 (2018):16-25,
https://doi.org/10.1016/j.jelechem.2017.06.011 . .

TY  - JOUR
AU  - Lović, J. D.
AU  - Elezović, Nevenka R.
AU  - Jović, Borka M
AU  - Zabinski, P.
AU  - Gajić-Krstajić, Ljiljana M
AU  - Jović, Vladimir D
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1153
AB  - The Pd and three AgPd alloy layers (AgPd1, AgPd2 and AgPd3) were electrodeposited onto Au disc electrodes from the solution containing high concentration of chloride ions (>12 M). All coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), anodic linear sweep voltammetry (ALSV), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS). The AgPd1 and AgPd2 samples were electrodeposited at different constant current densities (-0.178 mA cm(-2) and -0.415 mA cm(-2) respectively) to the charge of -0.2 C cm(-2) (thickness similar to 0.18 mu m) at a stationary disc electrode, while the sample AgPd3 was electrodeposited to the charge of -3.0 C cm(-2) (thickness similar to 2.8 mu m) at a constant current density of -7.0 mA cm(-2) under the conditions of convective diffusion. Samples AgPd1 and AgPd2 had similar morphologies of low roughness, while the morphology of AgPd3 was characterized by large crystals and higher roughness. The most active and the most poisoning tolerant coatings for ethanol oxidation reaction (EOR) are the AgPd3 and AgPd1 alloy samples, containing 72.6 at.% Ag - 27.4 at.% Pd and 84.7 at.% Ag - 15.2 at.% Pd respectively (XPS analysis). In this study, we demonstrated for the first time that the activity for the EOR at AgPd alloys was closely related to the amount of non-reduced Ag2O (most probably as Ag - hydroxide). Accordingly, all AgPd alloy samples had to be cycled in the potential region of Ag2O formation and reduction before the investigation of the EOR, in order to provide their catalytic activity towards the EOR.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Hydrogen Energy
T1  - Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction
EP  - 18508
IS  - 39
SP  - 18498
VL  - 43
DO  - 10.1016/j.ijhydene.2018.08.056
ER  - 

@article{
author = "Lović, J. D. and Elezović, Nevenka R. and Jović, Borka M and Zabinski, P. and Gajić-Krstajić, Ljiljana M and Jović, Vladimir D",
year = "2018",
abstract = "The Pd and three AgPd alloy layers (AgPd1, AgPd2 and AgPd3) were electrodeposited onto Au disc electrodes from the solution containing high concentration of chloride ions (>12 M). All coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), anodic linear sweep voltammetry (ALSV), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS). The AgPd1 and AgPd2 samples were electrodeposited at different constant current densities (-0.178 mA cm(-2) and -0.415 mA cm(-2) respectively) to the charge of -0.2 C cm(-2) (thickness similar to 0.18 mu m) at a stationary disc electrode, while the sample AgPd3 was electrodeposited to the charge of -3.0 C cm(-2) (thickness similar to 2.8 mu m) at a constant current density of -7.0 mA cm(-2) under the conditions of convective diffusion. Samples AgPd1 and AgPd2 had similar morphologies of low roughness, while the morphology of AgPd3 was characterized by large crystals and higher roughness. The most active and the most poisoning tolerant coatings for ethanol oxidation reaction (EOR) are the AgPd3 and AgPd1 alloy samples, containing 72.6 at.% Ag - 27.4 at.% Pd and 84.7 at.% Ag - 15.2 at.% Pd respectively (XPS analysis). In this study, we demonstrated for the first time that the activity for the EOR at AgPd alloys was closely related to the amount of non-reduced Ag2O (most probably as Ag - hydroxide). Accordingly, all AgPd alloy samples had to be cycled in the potential region of Ag2O formation and reduction before the investigation of the EOR, in order to provide their catalytic activity towards the EOR.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Hydrogen Energy",
title = "Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction",
pages = "18508-18498",
number = "39",
volume = "43",
doi = "10.1016/j.ijhydene.2018.08.056"
}

Lović, J. D., Elezović, N. R., Jović, B. M., Zabinski, P., Gajić-Krstajić, L. M.,& Jović, V. D.. (2018). Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction. in International Journal of Hydrogen Energy
Pergamon-Elsevier Science Ltd, Oxford., 43(39), 18498-18508.
https://doi.org/10.1016/j.ijhydene.2018.08.056

Lović JD, Elezović NR, Jović BM, Zabinski P, Gajić-Krstajić LM, Jović VD. Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction. in International Journal of Hydrogen Energy. 2018;43(39):18498-18508.
doi:10.1016/j.ijhydene.2018.08.056 .

Lović, J. D., Elezović, Nevenka R., Jović, Borka M, Zabinski, P., Gajić-Krstajić, Ljiljana M, Jović, Vladimir D, "Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction" in International Journal of Hydrogen Energy, 43, no. 39 (2018):18498-18508,
https://doi.org/10.1016/j.ijhydene.2018.08.056 . .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Zabinski, Piotr
AU  - Krstajic-Pajic, M. N.
AU  - Tokarski, Tomasz
AU  - Jović, Borka M
AU  - Jović, Vladimir D
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1131
AB  - The AgPd alloys were electrodeposited onto Au and glassy carbon disc electrodes from the solution containing 0 001 mol dm(-3) PdCl2 + 0.04 mol dm(-3) AgCl + 0.1 mol dm(-3) HCl + 12 mol dm(-3) LiCl under the non-stationary diffusion (quiescent electrolyte) and convective diffusion (omega = 1000 rpm) to the different amounts of charge and at different current densities. Electro-deposited alloy layers were characterized by the anodic linear sweep voltam-metry (ALSV), scanning electron microscopy, energy dispersive X-ray spectro-scopy (EDS) and X-ray photoelectron spectroscopy (XPS). The compositions of the AgPd alloys determined by the EDS were almost identical to the theoretically predicted ones, while the compositions obtained by XPS and ALSV analysis were similar to each other, but different from those obtained by EDS. Deviation from the theoretically predicted values (determined by the ratio j(L)(Pd)/j(Ag)) was more pronounced at lower current densities and lower charges of AgPd alloys electrodeposition, due to the lower current efficiencies for alloys electrodeposition. The ALSV analysis indicated the presence of Ag and Pd, expressed by two ALSV peaks, and in some cases the presence of the additional peak, which was found to correspond to the dissolution of large AgPd crystals, formed at thicker electrodeposits (higher electrodeposition charge), indicating, for the first time, that besides the phase structure, the morphology of alloy electrodeposit could also influence the shape of the ALSV response. In addition to Ag and Pd, the XPS analysis confirmed the presence of AgCl at the surface of samples electrodeposited to low thicknesses (amounts of charge).
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical deposition and characterization of AgPd alloy layers
EP  - 609
IS  - 5
SP  - 593
VL  - 83
DO  - 10.2298/JSC171103011E
ER  - 

@article{
author = "Elezović, Nevenka R. and Zabinski, Piotr and Krstajic-Pajic, M. N. and Tokarski, Tomasz and Jović, Borka M and Jović, Vladimir D",
year = "2018",
abstract = "The AgPd alloys were electrodeposited onto Au and glassy carbon disc electrodes from the solution containing 0 001 mol dm(-3) PdCl2 + 0.04 mol dm(-3) AgCl + 0.1 mol dm(-3) HCl + 12 mol dm(-3) LiCl under the non-stationary diffusion (quiescent electrolyte) and convective diffusion (omega = 1000 rpm) to the different amounts of charge and at different current densities. Electro-deposited alloy layers were characterized by the anodic linear sweep voltam-metry (ALSV), scanning electron microscopy, energy dispersive X-ray spectro-scopy (EDS) and X-ray photoelectron spectroscopy (XPS). The compositions of the AgPd alloys determined by the EDS were almost identical to the theoretically predicted ones, while the compositions obtained by XPS and ALSV analysis were similar to each other, but different from those obtained by EDS. Deviation from the theoretically predicted values (determined by the ratio j(L)(Pd)/j(Ag)) was more pronounced at lower current densities and lower charges of AgPd alloys electrodeposition, due to the lower current efficiencies for alloys electrodeposition. The ALSV analysis indicated the presence of Ag and Pd, expressed by two ALSV peaks, and in some cases the presence of the additional peak, which was found to correspond to the dissolution of large AgPd crystals, formed at thicker electrodeposits (higher electrodeposition charge), indicating, for the first time, that besides the phase structure, the morphology of alloy electrodeposit could also influence the shape of the ALSV response. In addition to Ag and Pd, the XPS analysis confirmed the presence of AgCl at the surface of samples electrodeposited to low thicknesses (amounts of charge).",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical deposition and characterization of AgPd alloy layers",
pages = "609-593",
number = "5",
volume = "83",
doi = "10.2298/JSC171103011E"
}

Elezović, N. R., Zabinski, P., Krstajic-Pajic, M. N., Tokarski, T., Jović, B. M.,& Jović, V. D.. (2018). Electrochemical deposition and characterization of AgPd alloy layers. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 83(5), 593-609.
https://doi.org/10.2298/JSC171103011E

Elezović NR, Zabinski P, Krstajic-Pajic MN, Tokarski T, Jović BM, Jović VD. Electrochemical deposition and characterization of AgPd alloy layers. in Journal of the Serbian Chemical Society. 2018;83(5):593-609.
doi:10.2298/JSC171103011E .

Elezović, Nevenka R., Zabinski, Piotr, Krstajic-Pajic, M. N., Tokarski, Tomasz, Jović, Borka M, Jović, Vladimir D, "Electrochemical deposition and characterization of AgPd alloy layers" in Journal of the Serbian Chemical Society, 83, no. 5 (2018):593-609,
https://doi.org/10.2298/JSC171103011E . .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Zabinski, P.
AU  - Ercius, P.
AU  - Wytrwal, M.
AU  - Radmilović, Velimir R
AU  - Lačnjevac, Uroš
AU  - Krstajić, Nedeljko V
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1104
AB  - Tungsten based support was prepared by polycondensation of resorcinol and formaldehyde from ammonium metatungstate, in the presence cetyltrimethylammonium bromide (CTABr) surfactant. Pd nanocatalyst on this support was synthesized by borohydride reduction method. The obtained materials were characterized by High Resolution Transmission Electron Microscopy (HRTEM), Electron Energy Loss Spectroscopy (EELS), X-ray Photoelectron Spectroscopy (XPS) and electrochemical measurements. TEM analysis revealed Pd nanoparticles size in the range of a few nanometers, even the clusters of single Pd atoms. X-Ray Photoelectron Spectroscopy was applied to determine surface composition of the substrates. It was found that tungsten based support consisted of W, WC and WO3 species. The presence of metallic palladium - Pd(0) in the Pd/W"WCWO3 catalyst was revealed, as well. The catalytic activity and stability for the oxygen reduction were investigated in acid and alkaline solutions, by cyclic voltammetry and linear sweep voltammetry at the rotating disc electrode. The catalysts' activities were compared to the carbon supported Pd nanoparticles (Vulcan XC 72). WC supported Pd nanoparticles have shown high activity and superior stability, comparable even to Pt based catalysts, especially in alkaline electrolytes.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - High surface area Pd nanocatalyst on core-shell tungsten based support as a beneficial catalyst for low temperature fuel cells application
EP  - 684
SP  - 674
VL  - 247
DO  - 10.1016/j.electacta.2017.07.066
ER  - 

@article{
author = "Elezović, Nevenka R. and Zabinski, P. and Ercius, P. and Wytrwal, M. and Radmilović, Velimir R and Lačnjevac, Uroš and Krstajić, Nedeljko V",
year = "2017",
abstract = "Tungsten based support was prepared by polycondensation of resorcinol and formaldehyde from ammonium metatungstate, in the presence cetyltrimethylammonium bromide (CTABr) surfactant. Pd nanocatalyst on this support was synthesized by borohydride reduction method. The obtained materials were characterized by High Resolution Transmission Electron Microscopy (HRTEM), Electron Energy Loss Spectroscopy (EELS), X-ray Photoelectron Spectroscopy (XPS) and electrochemical measurements. TEM analysis revealed Pd nanoparticles size in the range of a few nanometers, even the clusters of single Pd atoms. X-Ray Photoelectron Spectroscopy was applied to determine surface composition of the substrates. It was found that tungsten based support consisted of W, WC and WO3 species. The presence of metallic palladium - Pd(0) in the Pd/W"WCWO3 catalyst was revealed, as well. The catalytic activity and stability for the oxygen reduction were investigated in acid and alkaline solutions, by cyclic voltammetry and linear sweep voltammetry at the rotating disc electrode. The catalysts' activities were compared to the carbon supported Pd nanoparticles (Vulcan XC 72). WC supported Pd nanoparticles have shown high activity and superior stability, comparable even to Pt based catalysts, especially in alkaline electrolytes.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "High surface area Pd nanocatalyst on core-shell tungsten based support as a beneficial catalyst for low temperature fuel cells application",
pages = "684-674",
volume = "247",
doi = "10.1016/j.electacta.2017.07.066"
}

Elezović, N. R., Zabinski, P., Ercius, P., Wytrwal, M., Radmilović, V. R., Lačnjevac, U.,& Krstajić, N. V.. (2017). High surface area Pd nanocatalyst on core-shell tungsten based support as a beneficial catalyst for low temperature fuel cells application. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 247, 674-684.
https://doi.org/10.1016/j.electacta.2017.07.066

Elezović NR, Zabinski P, Ercius P, Wytrwal M, Radmilović VR, Lačnjevac U, Krstajić NV. High surface area Pd nanocatalyst on core-shell tungsten based support as a beneficial catalyst for low temperature fuel cells application. in Electrochimica Acta. 2017;247:674-684.
doi:10.1016/j.electacta.2017.07.066 .

Elezović, Nevenka R., Zabinski, P., Ercius, P., Wytrwal, M., Radmilović, Velimir R, Lačnjevac, Uroš, Krstajić, Nedeljko V, "High surface area Pd nanocatalyst on core-shell tungsten based support as a beneficial catalyst for low temperature fuel cells application" in Electrochimica Acta, 247 (2017):674-684,
https://doi.org/10.1016/j.electacta.2017.07.066 . .

TY  - JOUR
AU  - Gajić-Krstajić, Ljiljana M
AU  - Elezović, Nevenka R.
AU  - Jović, Borka M
AU  - Martelli, Gian N.
AU  - Jović, Vladimir D
AU  - Krstajić, Nedeljko V
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/992
AB  - The aim of this study was to gain a better understanding of the feasibility of partial replacement of dichromate, Cr(VI), with phosphate buffer, focusing on the cathode reaction selectivity for hydrogen evolution on mild steel and Fe-Mo cathodes in undivided cell for chlorate production. To evaluate the ability of phosphate and Cr(VI) additions to hinder hypochlorite and chlorate reduction, overall current efficiency (CE) measurements in laboratory cell for chlorate production on stationary electrodes were performed. The concentration of hypochlorite was determined by a conventional potentiometric titration method using 0.01 mol dm(-3) As2O3 solution as a titrant. The chlorate concentration was determined by excess of 1.0 mol dm(-3) As2O3 solution and excess of arsenic oxide was titrated with 0.1 mol dm(-3) KBrO3 solution in a strong acidic solution. Cathodic hypochlorite and chlorate reduction were suppressed efficiently by addition of 3 g dm(-3) dichromate at both cathodes, except that Fe-Mo cathode exhibited higher catalytic activity for hydrogen evolution reaction (HER). The overvoltage for the HER was around 0.17 V lower on Fe-Mo cathode than on mild steel at the current density of 3 kA m(-2). It was found that a dichromate content as low as 0.1 g dm(-3) is sufficient for complete suppression of cathodic hypochlorite and chlorate reduction onto Fe-Mo catalyst in phosphate buffering system (3 g dm(-3) Na2HPO4 + NaH2PO4). The overall current efficiency was practically the same as in the case of the presence of 3 g dm(-3) dichromate buffer (98%). However, for the mild steel cathode, the overall current efficiency for the chlorate production was somewhat lower in the above mentioned mixed phosphate + dichromate buffering system (95%) than in the pure dichromate buffering solution (97.5%).
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Fe-Mo alloy coatings as cathodes in chlorate production process
EP  - 89
IS  - 1
SP  - 81
VL  - 70
DO  - 10.2298/HEMIND150119014G
ER  - 

@article{
author = "Gajić-Krstajić, Ljiljana M and Elezović, Nevenka R. and Jović, Borka M and Martelli, Gian N. and Jović, Vladimir D and Krstajić, Nedeljko V",
year = "2016",
abstract = "The aim of this study was to gain a better understanding of the feasibility of partial replacement of dichromate, Cr(VI), with phosphate buffer, focusing on the cathode reaction selectivity for hydrogen evolution on mild steel and Fe-Mo cathodes in undivided cell for chlorate production. To evaluate the ability of phosphate and Cr(VI) additions to hinder hypochlorite and chlorate reduction, overall current efficiency (CE) measurements in laboratory cell for chlorate production on stationary electrodes were performed. The concentration of hypochlorite was determined by a conventional potentiometric titration method using 0.01 mol dm(-3) As2O3 solution as a titrant. The chlorate concentration was determined by excess of 1.0 mol dm(-3) As2O3 solution and excess of arsenic oxide was titrated with 0.1 mol dm(-3) KBrO3 solution in a strong acidic solution. Cathodic hypochlorite and chlorate reduction were suppressed efficiently by addition of 3 g dm(-3) dichromate at both cathodes, except that Fe-Mo cathode exhibited higher catalytic activity for hydrogen evolution reaction (HER). The overvoltage for the HER was around 0.17 V lower on Fe-Mo cathode than on mild steel at the current density of 3 kA m(-2). It was found that a dichromate content as low as 0.1 g dm(-3) is sufficient for complete suppression of cathodic hypochlorite and chlorate reduction onto Fe-Mo catalyst in phosphate buffering system (3 g dm(-3) Na2HPO4 + NaH2PO4). The overall current efficiency was practically the same as in the case of the presence of 3 g dm(-3) dichromate buffer (98%). However, for the mild steel cathode, the overall current efficiency for the chlorate production was somewhat lower in the above mentioned mixed phosphate + dichromate buffering system (95%) than in the pure dichromate buffering solution (97.5%).",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Fe-Mo alloy coatings as cathodes in chlorate production process",
pages = "89-81",
number = "1",
volume = "70",
doi = "10.2298/HEMIND150119014G"
}

Gajić-Krstajić, L. M., Elezović, N. R., Jović, B. M., Martelli, G. N., Jović, V. D.,& Krstajić, N. V.. (2016). Fe-Mo alloy coatings as cathodes in chlorate production process. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 70(1), 81-89.
https://doi.org/10.2298/HEMIND150119014G

Gajić-Krstajić LM, Elezović NR, Jović BM, Martelli GN, Jović VD, Krstajić NV. Fe-Mo alloy coatings as cathodes in chlorate production process. in Hemijska Industrija. 2016;70(1):81-89.
doi:10.2298/HEMIND150119014G .

Gajić-Krstajić, Ljiljana M, Elezović, Nevenka R., Jović, Borka M, Martelli, Gian N., Jović, Vladimir D, Krstajić, Nedeljko V, "Fe-Mo alloy coatings as cathodes in chlorate production process" in Hemijska Industrija, 70, no. 1 (2016):81-89,
https://doi.org/10.2298/HEMIND150119014G . .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Radmilović, Velimir R
AU  - Krstajić, Nedeljko V
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/991
AB  - In this manuscript a survey of the contemporary research related to platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications is presented. Different carbon based supports, used as state of the art materials, are listed and discussed, as well. Although carbon based materials possess many desirable properties, such as high surface area, high conductivity and relatively low cost and easy synthesis, the large scale commercialization is limited by instability under accelerated stability testing, simulating real fuel cell operating conditions. To overcome these disadvantages of carbon supports, different metal oxide based ones have been studied and promising results are referenced. The most often used oxide based supports for low temperature fuel cell applications are presented in this review. Suitable discussion and future research related remarks are given, as well.
PB  - Royal Soc Chemistry, Cambridge
T2  - RSC Advances
T1  - Platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications
EP  - 6801
IS  - 8
SP  - 6788
VL  - 6
DO  - 10.1039/C5RA22403A
ER  - 

@article{
author = "Elezović, Nevenka R. and Radmilović, Velimir R and Krstajić, Nedeljko V",
year = "2016",
abstract = "In this manuscript a survey of the contemporary research related to platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications is presented. Different carbon based supports, used as state of the art materials, are listed and discussed, as well. Although carbon based materials possess many desirable properties, such as high surface area, high conductivity and relatively low cost and easy synthesis, the large scale commercialization is limited by instability under accelerated stability testing, simulating real fuel cell operating conditions. To overcome these disadvantages of carbon supports, different metal oxide based ones have been studied and promising results are referenced. The most often used oxide based supports for low temperature fuel cell applications are presented in this review. Suitable discussion and future research related remarks are given, as well.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "RSC Advances",
title = "Platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications",
pages = "6801-6788",
number = "8",
volume = "6",
doi = "10.1039/C5RA22403A"
}

Elezović, N. R., Radmilović, V. R.,& Krstajić, N. V.. (2016). Platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications. in RSC Advances
Royal Soc Chemistry, Cambridge., 6(8), 6788-6801.
https://doi.org/10.1039/C5RA22403A

Elezović NR, Radmilović VR, Krstajić NV. Platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications. in RSC Advances. 2016;6(8):6788-6801.
doi:10.1039/C5RA22403A .

Elezović, Nevenka R., Radmilović, Velimir R, Krstajić, Nedeljko V, "Platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications" in RSC Advances, 6, no. 8 (2016):6788-6801,
https://doi.org/10.1039/C5RA22403A . .