Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution
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2012
Authors
Elezović, Nevenka R.Babić, Biljana M.
Gajić-Krstajić, Ljiljana M
Ercius, P
Radmilović, Velimir R
Krstajić, Nedeljko V
Vračar, Ljiljana M
Article (Published version)
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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.
Keywords:
WC support / Pt/WC catalyst / Pt nanoparticles / Oxygen reduction reaction / Alkaline solutionSource:
Electrochimica Acta, 2012, 69, 239-246Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
Funding / projects:
- Development, characterization and application nanostructured and composite electrocatalysts and interactive supports for fuel cells and water electrolysis (RS-172054)
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
DOI: 10.1016/j.electacta.2012.02.105
ISSN: 0013-4686
WoS: 000304024400033
Scopus: 2-s2.0-84859612733
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Institution/Community
Institut za multidisciplinarna istraživanjaTY - 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 . .