Effect of chemisorbed carbon monoxide on Pt/C electrode on the mechanism of the hydrogen oxidation reaction
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2009
Authors
Elezović, Nevenka R.
Gajić Krstajić, Ljiljana
Radmilović, Velimir R.

Vračar, Ljiljana

Krstajić, Nedeljko
Article (Published version)

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The influence of poisoning of Pt catalyst by CO on the kinetics and mechanism of H2 oxidation reaction (HOR) at Pt/C electrode in 0.5 mol dm-3 HClO4, saturated with H2 containing 100 ppm CO, was examined with rotating disc electrode (RDE) at 22 °C. Commercial carbon black, Vulcan XC-72 was used as support, while Pt/C catalyst was prepared by modified polyol synthesis method in an ethylene glycol (EG) solution. The kinetically controlled current (Ik) for the HOR at Pt/C decreases significantly at CO coverage (ΘCO) > 0.6. For ΘCO < 0.6 the HOR takes place through Tafel-Volmer mechanism with Tafel reaction as rate-determining step at the low CO coverage, while Volmer step controls the overall reaction rate at the medium CO coverage. When CO coverage is higher then 0.6, Heyrovsky-Volmer mechanism is operative for the HOR with Heyrovsky as the rate-determining step (rds). © 2008 Elsevier Ltd. All rights reserved.
Keywords:
CO adsorption / hydrogen oxidation / mechanism / RDE / Pt nanosized catalystSource:
Electrochimica Acta, 2009, 54, 4, 1375-1382Publisher:
- Elsevier
Funding / projects:
DOI: 10.1016/j.electacta.2008.08.067
ISSN: 0013-4686
WoS: 000262810900031
Scopus: 2-s2.0-57749182921
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Elezović, Nevenka R. AU - Gajić Krstajić, Ljiljana AU - Radmilović, Velimir R. AU - Vračar, Ljiljana AU - Krstajić, Nedeljko PY - 2009 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5525 AB - The influence of poisoning of Pt catalyst by CO on the kinetics and mechanism of H2 oxidation reaction (HOR) at Pt/C electrode in 0.5 mol dm-3 HClO4, saturated with H2 containing 100 ppm CO, was examined with rotating disc electrode (RDE) at 22 °C. Commercial carbon black, Vulcan XC-72 was used as support, while Pt/C catalyst was prepared by modified polyol synthesis method in an ethylene glycol (EG) solution. The kinetically controlled current (Ik) for the HOR at Pt/C decreases significantly at CO coverage (ΘCO) > 0.6. For ΘCO < 0.6 the HOR takes place through Tafel-Volmer mechanism with Tafel reaction as rate-determining step at the low CO coverage, while Volmer step controls the overall reaction rate at the medium CO coverage. When CO coverage is higher then 0.6, Heyrovsky-Volmer mechanism is operative for the HOR with Heyrovsky as the rate-determining step (rds). © 2008 Elsevier Ltd. All rights reserved. PB - Elsevier T2 - Electrochimica Acta T1 - Effect of chemisorbed carbon monoxide on Pt/C electrode on the mechanism of the hydrogen oxidation reaction EP - 1382 IS - 4 SP - 1375 VL - 54 DO - 10.1016/j.electacta.2008.08.067 UR - https://hdl.handle.net/21.15107/rcub_dais_3485 ER -
@article{ author = "Elezović, Nevenka R. and Gajić Krstajić, Ljiljana and Radmilović, Velimir R. and Vračar, Ljiljana and Krstajić, Nedeljko", year = "2009", abstract = "The influence of poisoning of Pt catalyst by CO on the kinetics and mechanism of H2 oxidation reaction (HOR) at Pt/C electrode in 0.5 mol dm-3 HClO4, saturated with H2 containing 100 ppm CO, was examined with rotating disc electrode (RDE) at 22 °C. Commercial carbon black, Vulcan XC-72 was used as support, while Pt/C catalyst was prepared by modified polyol synthesis method in an ethylene glycol (EG) solution. The kinetically controlled current (Ik) for the HOR at Pt/C decreases significantly at CO coverage (ΘCO) > 0.6. For ΘCO < 0.6 the HOR takes place through Tafel-Volmer mechanism with Tafel reaction as rate-determining step at the low CO coverage, while Volmer step controls the overall reaction rate at the medium CO coverage. When CO coverage is higher then 0.6, Heyrovsky-Volmer mechanism is operative for the HOR with Heyrovsky as the rate-determining step (rds). © 2008 Elsevier Ltd. All rights reserved.", publisher = "Elsevier", journal = "Electrochimica Acta", title = "Effect of chemisorbed carbon monoxide on Pt/C electrode on the mechanism of the hydrogen oxidation reaction", pages = "1382-1375", number = "4", volume = "54", doi = "10.1016/j.electacta.2008.08.067", url = "https://hdl.handle.net/21.15107/rcub_dais_3485" }
Elezović, N. R., Gajić Krstajić, L., Radmilović, V. R., Vračar, L.,& Krstajić, N.. (2009). Effect of chemisorbed carbon monoxide on Pt/C electrode on the mechanism of the hydrogen oxidation reaction. in Electrochimica Acta Elsevier., 54(4), 1375-1382. https://doi.org/10.1016/j.electacta.2008.08.067 https://hdl.handle.net/21.15107/rcub_dais_3485
Elezović NR, Gajić Krstajić L, Radmilović VR, Vračar L, Krstajić N. Effect of chemisorbed carbon monoxide on Pt/C electrode on the mechanism of the hydrogen oxidation reaction. in Electrochimica Acta. 2009;54(4):1375-1382. doi:10.1016/j.electacta.2008.08.067 https://hdl.handle.net/21.15107/rcub_dais_3485 .
Elezović, Nevenka R., Gajić Krstajić, Ljiljana, Radmilović, Velimir R., Vračar, Ljiljana, Krstajić, Nedeljko, "Effect of chemisorbed carbon monoxide on Pt/C electrode on the mechanism of the hydrogen oxidation reaction" in Electrochimica Acta, 54, no. 4 (2009):1375-1382, https://doi.org/10.1016/j.electacta.2008.08.067 ., https://hdl.handle.net/21.15107/rcub_dais_3485 .