TY  - JOUR
AU  - Krstajić Pajić, Mila N.
AU  - Dobrota, Ana S.
AU  - Mazare, Anca
AU  - Đurđić, Slađana
AU  - Hwang, Imgon
AU  - Skorodumova, Natalia V.
AU  - Manojlović, Dragan
AU  - Vasilic, Rastko
AU  - Pašti, Igor A.
AU  - Schmuki, Patrik
AU  - Lačnjevac, Uroš
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2706
AB  - Efficient cathodes for the hydrogen evolution reaction (HER) in acidic
water electrolysis rely on the use of expensive platinum group metals (PGMs). However, to
achieve economically viable operation, both the content of PGMs must be reduced and
their intrinsically strong H adsorption mitigated. Herein, we show that the surface effects of
hydrogenated TiO2 nanotube (TNT) arrays can make osmium, a so far less-explored PGM,
a highly active HER electrocatalyst. These defect-rich TiO2 nanostructures provide an
interactive scaffold for the galvanic deposition of Os particles with modulated adsorption
properties. Through systematic investigations, we identify the synthesis conditions (OsCl3
concentration/temperature/reaction time) that yield a progressive improvement in Os
deposition rate and mass loading, thereby decreasing the HER overpotential. At the same
time, the Os particles deposited by this procedure remain mainly sub-nanometric and
entirely cover the inner tube walls. An optimally balanced Os@TNT composite prepared at
3 mM/55 °C/30 min exhibits a record low overpotential (η) of 61 mV at a current density
of 100 mA cm−2, a high mass activity of 20.8 A mgOs
−1 at 80 mV, and a stable performance in an acidic medium. Density functional
theory calculations indicate the existence of strong interactions between the hydrogenated TiO2 surface and small Os clusters, which
may weaken the Os−H* binding strength and thus boost the intrinsic HER activity of Os centers. The results presented in this study
offer new directions for the fabrication of cost-effective PGM-based catalysts and a better understanding of the synergistic electronic
interactions at the PGM|TiO2 interface.
PB  - American Chemical Society
T2  - ACS Applied Materials and Interfaces
T1  - Activation of Osmium by the Surface Effects of Hydrogenated TiO2 Nanotube Arrays for Enhanced Hydrogen Evolution Reaction Performance
EP  - 31469
IS  - 26
SP  - 31459
VL  - 15
DO  - 10.1021/acsami.3c04498
ER  - 

@article{
author = "Krstajić Pajić, Mila N. and Dobrota, Ana S. and Mazare, Anca and Đurđić, Slađana and Hwang, Imgon and Skorodumova, Natalia V. and Manojlović, Dragan and Vasilic, Rastko and Pašti, Igor A. and Schmuki, Patrik and Lačnjevac, Uroš",
year = "2023",
abstract = "Efficient cathodes for the hydrogen evolution reaction (HER) in acidic
water electrolysis rely on the use of expensive platinum group metals (PGMs). However, to
achieve economically viable operation, both the content of PGMs must be reduced and
their intrinsically strong H adsorption mitigated. Herein, we show that the surface effects of
hydrogenated TiO2 nanotube (TNT) arrays can make osmium, a so far less-explored PGM,
a highly active HER electrocatalyst. These defect-rich TiO2 nanostructures provide an
interactive scaffold for the galvanic deposition of Os particles with modulated adsorption
properties. Through systematic investigations, we identify the synthesis conditions (OsCl3
concentration/temperature/reaction time) that yield a progressive improvement in Os
deposition rate and mass loading, thereby decreasing the HER overpotential. At the same
time, the Os particles deposited by this procedure remain mainly sub-nanometric and
entirely cover the inner tube walls. An optimally balanced Os@TNT composite prepared at
3 mM/55 °C/30 min exhibits a record low overpotential (η) of 61 mV at a current density
of 100 mA cm−2, a high mass activity of 20.8 A mgOs
−1 at 80 mV, and a stable performance in an acidic medium. Density functional
theory calculations indicate the existence of strong interactions between the hydrogenated TiO2 surface and small Os clusters, which
may weaken the Os−H* binding strength and thus boost the intrinsic HER activity of Os centers. The results presented in this study
offer new directions for the fabrication of cost-effective PGM-based catalysts and a better understanding of the synergistic electronic
interactions at the PGM|TiO2 interface.",
publisher = "American Chemical Society",
journal = "ACS Applied Materials and Interfaces",
title = "Activation of Osmium by the Surface Effects of Hydrogenated TiO2 Nanotube Arrays for Enhanced Hydrogen Evolution Reaction Performance",
pages = "31469-31459",
number = "26",
volume = "15",
doi = "10.1021/acsami.3c04498"
}

Krstajić Pajić, M. N., Dobrota, A. S., Mazare, A., Đurđić, S., Hwang, I., Skorodumova, N. V., Manojlović, D., Vasilic, R., Pašti, I. A., Schmuki, P.,& Lačnjevac, U.. (2023). Activation of Osmium by the Surface Effects of Hydrogenated TiO2 Nanotube Arrays for Enhanced Hydrogen Evolution Reaction Performance. in ACS Applied Materials and Interfaces
American Chemical Society., 15(26), 31459-31469.
https://doi.org/10.1021/acsami.3c04498

Krstajić Pajić MN, Dobrota AS, Mazare A, Đurđić S, Hwang I, Skorodumova NV, Manojlović D, Vasilic R, Pašti IA, Schmuki P, Lačnjevac U. Activation of Osmium by the Surface Effects of Hydrogenated TiO2 Nanotube Arrays for Enhanced Hydrogen Evolution Reaction Performance. in ACS Applied Materials and Interfaces. 2023;15(26):31459-31469.
doi:10.1021/acsami.3c04498 .

Krstajić Pajić, Mila N., Dobrota, Ana S., Mazare, Anca, Đurđić, Slađana, Hwang, Imgon, Skorodumova, Natalia V., Manojlović, Dragan, Vasilic, Rastko, Pašti, Igor A., Schmuki, Patrik, Lačnjevac, Uroš, "Activation of Osmium by the Surface Effects of Hydrogenated TiO2 Nanotube Arrays for Enhanced Hydrogen Evolution Reaction Performance" in ACS Applied Materials and Interfaces, 15, no. 26 (2023):31459-31469,
https://doi.org/10.1021/acsami.3c04498 . .

TY  - JOUR
AU  - Šuljagić, Marija
AU  - Kremenović, Aleksandar S
AU  - Petronijević, Ivan
AU  - Džunuzović, Adis
AU  - Mirković, Miljana
AU  - Pavlović, Vladimir
AU  - Anđelković, Ljubica
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2195
AB  - To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the samples sintered at 1300°C had better performances than those sintered at 1150°C. The composite synthesized by thermal decomposition and sintered at 1300 °C stands out among other prepared BaTiO3/CoFe2O4 ceramics, owing to high stability in the wide frequency range and low leakage currents. The obtained results indicate that such composite might be successfully applied as a functional multiferroic.
PB  - Association for ETRAN Society
T2  - Science of Sintering
T1  - Understanding the Effect of Synthesis and Sintering Temperature on the Functional Properties of Barium Titanate/ Cobalt Ferrite Composites
EP  - 381
SP  - 367
VL  - 55
DO  - 10.2298/SOS220512013S
ER  - 

@article{
author = "Šuljagić, Marija and Kremenović, Aleksandar S and Petronijević, Ivan and Džunuzović, Adis and Mirković, Miljana and Pavlović, Vladimir and Anđelković, Ljubica",
year = "2023",
abstract = "To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the samples sintered at 1300°C had better performances than those sintered at 1150°C. The composite synthesized by thermal decomposition and sintered at 1300 °C stands out among other prepared BaTiO3/CoFe2O4 ceramics, owing to high stability in the wide frequency range and low leakage currents. The obtained results indicate that such composite might be successfully applied as a functional multiferroic.",
publisher = "Association for ETRAN Society",
journal = "Science of Sintering",
title = "Understanding the Effect of Synthesis and Sintering Temperature on the Functional Properties of Barium Titanate/ Cobalt Ferrite Composites",
pages = "381-367",
volume = "55",
doi = "10.2298/SOS220512013S"
}

Šuljagić, M., Kremenović, A. S., Petronijević, I., Džunuzović, A., Mirković, M., Pavlović, V.,& Anđelković, L.. (2023). Understanding the Effect of Synthesis and Sintering Temperature on the Functional Properties of Barium Titanate/ Cobalt Ferrite Composites. in Science of Sintering
Association for ETRAN Society., 55, 367-381.
https://doi.org/10.2298/SOS220512013S

Šuljagić M, Kremenović AS, Petronijević I, Džunuzović A, Mirković M, Pavlović V, Anđelković L. Understanding the Effect of Synthesis and Sintering Temperature on the Functional Properties of Barium Titanate/ Cobalt Ferrite Composites. in Science of Sintering. 2023;55:367-381.
doi:10.2298/SOS220512013S .

Šuljagić, Marija, Kremenović, Aleksandar S, Petronijević, Ivan, Džunuzović, Adis, Mirković, Miljana, Pavlović, Vladimir, Anđelković, Ljubica, "Understanding the Effect of Synthesis and Sintering Temperature on the Functional Properties of Barium Titanate/ Cobalt Ferrite Composites" in Science of Sintering, 55 (2023):367-381,
https://doi.org/10.2298/SOS220512013S . .

TY  - JOUR
AU  - Šuljagić, Marija
AU  - Petronijević, Ivan
AU  - Mirković, Miljana
AU  - Kremenović, Aleksandar S
AU  - Džunuzović, Adis
AU  - Pavlović, Vladimir B.
AU  - Kalezić-Glišović, Aleksandra
AU  - Anđelković, Ljubica
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2103
AB  - To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ferroelectric properties were investigated. The optimal phase composition in the BaTiO3/NiFe2O4 composite, sintered at 1150 °C, resulted in a wide frequency range stability. Additionally, particular phase composition indicates favorable properties such as low conductivity and ideal-like hysteresis loop behavior. The favorable properties of BaTiO3/NiFe2O4 make this particular composite an ideal material choice for further studies on applications of multi-ferroic devices.
PB  - MDPI
T2  - Inorganics
T1  - BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties
IS  - 2
SP  - 51
VL  - 11
DO  - 10.3390/inorganics11020051
ER  - 

@article{
author = "Šuljagić, Marija and Petronijević, Ivan and Mirković, Miljana and Kremenović, Aleksandar S and Džunuzović, Adis and Pavlović, Vladimir B. and Kalezić-Glišović, Aleksandra and Anđelković, Ljubica",
year = "2023",
abstract = "To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ferroelectric properties were investigated. The optimal phase composition in the BaTiO3/NiFe2O4 composite, sintered at 1150 °C, resulted in a wide frequency range stability. Additionally, particular phase composition indicates favorable properties such as low conductivity and ideal-like hysteresis loop behavior. The favorable properties of BaTiO3/NiFe2O4 make this particular composite an ideal material choice for further studies on applications of multi-ferroic devices.",
publisher = "MDPI",
journal = "Inorganics",
title = "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties",
number = "2",
pages = "51",
volume = "11",
doi = "10.3390/inorganics11020051"
}

Šuljagić, M., Petronijević, I., Mirković, M., Kremenović, A. S., Džunuzović, A., Pavlović, V. B., Kalezić-Glišović, A.,& Anđelković, L.. (2023). BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties. in Inorganics
MDPI., 11(2), 51.
https://doi.org/10.3390/inorganics11020051

Šuljagić M, Petronijević I, Mirković M, Kremenović AS, Džunuzović A, Pavlović VB, Kalezić-Glišović A, Anđelković L. BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties. in Inorganics. 2023;11(2):51.
doi:10.3390/inorganics11020051 .

Šuljagić, Marija, Petronijević, Ivan, Mirković, Miljana, Kremenović, Aleksandar S, Džunuzović, Adis, Pavlović, Vladimir B., Kalezić-Glišović, Aleksandra, Anđelković, Ljubica, "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties" in Inorganics, 11, no. 2 (2023):51,
https://doi.org/10.3390/inorganics11020051 . .