Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution
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Elezovic, N. R.Babić, Biljana M.
Gajic-Krstajic, Lj.
Ercius, P.
Radmilovíć, Velimir R.
Krstajic, N. V.
Vracar, Lj. M.
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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. (C) 2012 Elsevier Ltd. All rights reserved.
Keywords:
WC support / Pt/WC catalyst / Pt nanoparticles / Oxygen reduction reaction / Alkaline solutionSource:
Electrochimica Acta, 2012, 69, 239-246Funding / projects:
- Development, characterization and application nanostructured and composite electrocatalysts and interactive supports for fuel cells and water electrolysis (RS-MESTD-Basic Research (BR or ON)-172054)
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [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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VinčaTY - JOUR AU - Elezovic, N. R. AU - Babić, Biljana M. AU - Gajic-Krstajic, Lj. AU - Ercius, P. AU - Radmilovíć, Velimir R. AU - Krstajic, N. V. AU - Vracar, Lj. M. PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4846 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. (C) 2012 Elsevier Ltd. All rights reserved. T2 - Electrochimica Acta T1 - Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution VL - 69 SP - 239 EP - 246 DO - 10.1016/j.electacta.2012.02.105 ER -
@article{ author = "Elezovic, N. R. and Babić, Biljana M. and Gajic-Krstajic, Lj. and Ercius, P. and Radmilovíć, Velimir R. and Krstajic, N. V. and Vracar, Lj. 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. (C) 2012 Elsevier Ltd. All rights reserved.", journal = "Electrochimica Acta", title = "Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution", volume = "69", pages = "239-246", doi = "10.1016/j.electacta.2012.02.105" }
Elezovic, N. R., Babić, B. M., Gajic-Krstajic, Lj., Ercius, P., Radmilovíć, V. R., Krstajic, N. V.,& Vracar, Lj. M.. (2012). Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution. in Electrochimica Acta, 69, 239-246. https://doi.org/10.1016/j.electacta.2012.02.105
Elezovic NR, Babić BM, Gajic-Krstajic L, Ercius P, Radmilovíć VR, Krstajic NV, Vracar 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 .
Elezovic, N. R., Babić, Biljana M., Gajic-Krstajic, Lj., Ercius, P., Radmilovíć, Velimir R., Krstajic, N. V., Vracar, Lj. 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 . .