TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Babić, Biljana M.
AU  - Ercius, P
AU  - Radmilović, Velimir R
AU  - Vračar, Ljiljana M
AU  - Krstajić, Nedeljko V
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/596
AB  - Platinum nanocatalysts on two tungsten based supports have been synthesized and characterized as catalysts for oxygen reduction reaction in 0.5 mol dm(-3) HClO4 solution, at 25 degrees C. Tungsten based support assigned WCctabr has been synthesized by polycondensation of resorcinol and formaldehyde in the presence of CTABr surfactant. Support assigned WCwo(3) was synthesized from resorcinol/formaldehyde gel, using WO3 nanoparticles as starting material. Supporting materials have been characterized by BET (Brunauer, Emmett and Teller) technique and determined values of surface area were 80 m(2) g(-1) for WCctabr and 175 m(2) g(-1) for WCWO3. Platinum nanocatalysts (10% Pt) at tungsten based supports have been prepared by borohydride reduction method. Both synthesized supports and catalysts have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) techniques. Cyclic voltammetry was applied for determination of electrochemically active surface area (40 m2 g(-1) for Pt/WCWO3 and 55 m(2) g(-1) for Pt/WCctabr). Oxygen reduction reaction has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode (RDE). These catalysts exhibited better catalytic activity, expressed in terms of kinetic current density per real surface area at the constant potential and better stability, in comparison with Pt/C catalyst, as well as with already reported catalytic activity values for Pt catalysts on tungsten based supports.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Catalysis B-Environmental
T1  - Synthesis and characterization Pt nanocatalysts on tungsten based supports for oxygen reduction reaction
EP  - 397
SP  - 390
VL  - 125
DO  - 10.1016/j.apcatb.2012.06.008
ER  - 

@article{
author = "Elezović, Nevenka R. and Babić, Biljana M. and Ercius, P and Radmilović, Velimir R and Vračar, Ljiljana M and Krstajić, Nedeljko V",
year = "2012",
abstract = "Platinum nanocatalysts on two tungsten based supports have been synthesized and characterized as catalysts for oxygen reduction reaction in 0.5 mol dm(-3) HClO4 solution, at 25 degrees C. Tungsten based support assigned WCctabr has been synthesized by polycondensation of resorcinol and formaldehyde in the presence of CTABr surfactant. Support assigned WCwo(3) was synthesized from resorcinol/formaldehyde gel, using WO3 nanoparticles as starting material. Supporting materials have been characterized by BET (Brunauer, Emmett and Teller) technique and determined values of surface area were 80 m(2) g(-1) for WCctabr and 175 m(2) g(-1) for WCWO3. Platinum nanocatalysts (10% Pt) at tungsten based supports have been prepared by borohydride reduction method. Both synthesized supports and catalysts have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) techniques. Cyclic voltammetry was applied for determination of electrochemically active surface area (40 m2 g(-1) for Pt/WCWO3 and 55 m(2) g(-1) for Pt/WCctabr). Oxygen reduction reaction has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode (RDE). These catalysts exhibited better catalytic activity, expressed in terms of kinetic current density per real surface area at the constant potential and better stability, in comparison with Pt/C catalyst, as well as with already reported catalytic activity values for Pt catalysts on tungsten based supports.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Catalysis B-Environmental",
title = "Synthesis and characterization Pt nanocatalysts on tungsten based supports for oxygen reduction reaction",
pages = "397-390",
volume = "125",
doi = "10.1016/j.apcatb.2012.06.008"
}

Elezović, N. R., Babić, B. M., Ercius, P., Radmilović, V. R., Vračar, L. M.,& Krstajić, N. V.. (2012). Synthesis and characterization Pt nanocatalysts on tungsten based supports for oxygen reduction reaction. in Applied Catalysis B-Environmental
Elsevier Science Bv, Amsterdam., 125, 390-397.
https://doi.org/10.1016/j.apcatb.2012.06.008

Elezović NR, Babić BM, Ercius P, Radmilović VR, Vračar LM, Krstajić NV. Synthesis and characterization Pt nanocatalysts on tungsten based supports for oxygen reduction reaction. in Applied Catalysis B-Environmental. 2012;125:390-397.
doi:10.1016/j.apcatb.2012.06.008 .

Elezović, Nevenka R., Babić, Biljana M., Ercius, P, Radmilović, Velimir R, Vračar, Ljiljana M, Krstajić, Nedeljko V, "Synthesis and characterization Pt nanocatalysts on tungsten based supports for oxygen reduction reaction" in Applied Catalysis B-Environmental, 125 (2012):390-397,
https://doi.org/10.1016/j.apcatb.2012.06.008 . .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Babić, Biljana M.
AU  - Gajić-Krstajić, Ljiljana M
AU  - Ercius, P
AU  - Radmilović, Velimir R
AU  - Krstajić, Nedeljko V
AU  - Vračar, Ljiljana M
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/570
AB  - Platinum nanocatalyst at nano-tungsten carbide was synthesized, characterized and tested for oxygen reduction reaction (ORR) in 0.1 mol dm(-3) NaOH, at 25 degrees C. Tungsten-carbide islands on nano-tungsten particles (WC) was synthesized from gel prepared by using nanoparticles of WO3, previously produced from W-powder oxidized in H2O2. The support was porous material with high specific surface area (177 m(2)g(-1)). The WC supported Pt (10 wt.%) catalyst was prepared by borohydride reduction method. X-ray diffraction of the catalyst demonstrates successful reduction of Pt precursor to metallic form. STEM analysis of Pt/WC catalyst showed the existence of Pt particles lower than 2 nm in size, even the clusters of Pt atoms. Electrochemically active surface area of Pt was determined from adsorption/desorption charge of hydrogen atoms. Catalytic activity of the synthesized catalyst for ORR was studied by cyclic voltammetry and linear sweep voltammetry at rotating disk electrode. The onset potential on Pt/WC for ORR, comparing with Pt/Vulcan, was shifted to the positive potentials for about 150 mV. Pt/WC catalyst shows one Tafel slope of -0.105 V dec(-1), remarkable catalytic activity expressed either through the value of the current density per real surface area, or through the mass activity and excellent stability.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution
EP  - 246
SP  - 239
VL  - 69
DO  - 10.1016/j.electacta.2012.02.105
ER  - 

@article{
author = "Elezović, Nevenka R. and Babić, Biljana M. and Gajić-Krstajić, Ljiljana M and Ercius, P and Radmilović, Velimir R and Krstajić, Nedeljko V and Vračar, Ljiljana M",
year = "2012",
abstract = "Platinum nanocatalyst at nano-tungsten carbide was synthesized, characterized and tested for oxygen reduction reaction (ORR) in 0.1 mol dm(-3) NaOH, at 25 degrees C. Tungsten-carbide islands on nano-tungsten particles (WC) was synthesized from gel prepared by using nanoparticles of WO3, previously produced from W-powder oxidized in H2O2. The support was porous material with high specific surface area (177 m(2)g(-1)). The WC supported Pt (10 wt.%) catalyst was prepared by borohydride reduction method. X-ray diffraction of the catalyst demonstrates successful reduction of Pt precursor to metallic form. STEM analysis of Pt/WC catalyst showed the existence of Pt particles lower than 2 nm in size, even the clusters of Pt atoms. Electrochemically active surface area of Pt was determined from adsorption/desorption charge of hydrogen atoms. Catalytic activity of the synthesized catalyst for ORR was studied by cyclic voltammetry and linear sweep voltammetry at rotating disk electrode. The onset potential on Pt/WC for ORR, comparing with Pt/Vulcan, was shifted to the positive potentials for about 150 mV. Pt/WC catalyst shows one Tafel slope of -0.105 V dec(-1), remarkable catalytic activity expressed either through the value of the current density per real surface area, or through the mass activity and excellent stability.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution",
pages = "246-239",
volume = "69",
doi = "10.1016/j.electacta.2012.02.105"
}

Elezović, N. R., Babić, B. M., Gajić-Krstajić, L. M., Ercius, P., Radmilović, V. R., Krstajić, N. V.,& Vračar, L. M.. (2012). Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 69, 239-246.
https://doi.org/10.1016/j.electacta.2012.02.105

Elezović NR, Babić BM, Gajić-Krstajić LM, Ercius P, Radmilović VR, Krstajić NV, Vračar LM. Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution. in Electrochimica Acta. 2012;69:239-246.
doi:10.1016/j.electacta.2012.02.105 .

Elezović, Nevenka R., Babić, Biljana M., Gajić-Krstajić, Ljiljana M, Ercius, P, Radmilović, Velimir R, Krstajić, Nedeljko V, Vračar, Ljiljana M, "Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution" in Electrochimica Acta, 69 (2012):239-246,
https://doi.org/10.1016/j.electacta.2012.02.105 . .

TY  - JOUR
AU  - Obradović, Maja D
AU  - Gojković, Snežana Lj
AU  - Elezović, Nevenka R.
AU  - Ercius, P
AU  - Radmilović, Velimir R
AU  - Vračar, Ljiljana M
AU  - Krstajić, Nedeljko V
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/513
AB  - The catalytic activity of WC/Pt electrocatalysts towards hydrogen oxidation reaction (HOR) in acid solution was studied. Tungsten carbide (WC) prepared by polycondensation of resorcinol and formaldehyde in the presence of ammonium metatungstate salt and CTABr surfactant was used as the support of a Pt electrocatalyst (WC/Pt). The obtained WC/Pt electrodes were characterized by XRD, HRTEM, EDS, EELS and electrochemical measurements. HRTEM analysis showed that the WC particles possess a core-shell structure with a metallic tungsten core and a shell composed of a mixture of tungsten carbides shell (WC and W2C). The WC/Pt catalyst is composed of well-dispersed sub-nanometer Pt clusters which consist of a few to several tens of Pt atoms. EELS measurements indicate that the WC particles function as nucleation sites for Pt nanoparticles. Based on the Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the HOR current-potential behavior over the entire potential region on RDE. The fitting showed that in the lower potential region HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway. The kinetic results also showed that the WC/Pt(1%) when compared to the standard C/Pt(1%) electrode led to a remarkable enhancement of the hydrogen oxidation in an acidic medium, which was explained by H-spill-over between platinum and tungsten carbide.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - The kinetics of the hydrogen oxidation reaction on WC/Pt catalyst with low content of Pt nano-particles
EP  - 32
SP  - 24
VL  - 671
DO  - 10.1016/j.jelechem.2012.01.026
ER  - 

@article{
author = "Obradović, Maja D and Gojković, Snežana Lj and Elezović, Nevenka R. and Ercius, P and Radmilović, Velimir R and Vračar, Ljiljana M and Krstajić, Nedeljko V",
year = "2012",
abstract = "The catalytic activity of WC/Pt electrocatalysts towards hydrogen oxidation reaction (HOR) in acid solution was studied. Tungsten carbide (WC) prepared by polycondensation of resorcinol and formaldehyde in the presence of ammonium metatungstate salt and CTABr surfactant was used as the support of a Pt electrocatalyst (WC/Pt). The obtained WC/Pt electrodes were characterized by XRD, HRTEM, EDS, EELS and electrochemical measurements. HRTEM analysis showed that the WC particles possess a core-shell structure with a metallic tungsten core and a shell composed of a mixture of tungsten carbides shell (WC and W2C). The WC/Pt catalyst is composed of well-dispersed sub-nanometer Pt clusters which consist of a few to several tens of Pt atoms. EELS measurements indicate that the WC particles function as nucleation sites for Pt nanoparticles. Based on the Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the HOR current-potential behavior over the entire potential region on RDE. The fitting showed that in the lower potential region HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway. The kinetic results also showed that the WC/Pt(1%) when compared to the standard C/Pt(1%) electrode led to a remarkable enhancement of the hydrogen oxidation in an acidic medium, which was explained by H-spill-over between platinum and tungsten carbide.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "The kinetics of the hydrogen oxidation reaction on WC/Pt catalyst with low content of Pt nano-particles",
pages = "32-24",
volume = "671",
doi = "10.1016/j.jelechem.2012.01.026"
}

Obradović, M. D., Gojković, S. L., Elezović, N. R., Ercius, P., Radmilović, V. R., Vračar, L. M.,& Krstajić, N. V.. (2012). The kinetics of the hydrogen oxidation reaction on WC/Pt catalyst with low content of Pt nano-particles. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 671, 24-32.
https://doi.org/10.1016/j.jelechem.2012.01.026

Obradović MD, Gojković SL, Elezović NR, Ercius P, Radmilović VR, Vračar LM, Krstajić NV. The kinetics of the hydrogen oxidation reaction on WC/Pt catalyst with low content of Pt nano-particles. in Journal of Electroanalytical Chemistry. 2012;671:24-32.
doi:10.1016/j.jelechem.2012.01.026 .

Obradović, Maja D, Gojković, Snežana Lj, Elezović, Nevenka R., Ercius, P, Radmilović, Velimir R, Vračar, Ljiljana M, Krstajić, Nedeljko V, "The kinetics of the hydrogen oxidation reaction on WC/Pt catalyst with low content of Pt nano-particles" in Journal of Electroanalytical Chemistry, 671 (2012):24-32,
https://doi.org/10.1016/j.jelechem.2012.01.026 . .