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.![](/themes/MirageRIMSI/images/orcid.png)
Gajić-Krstajić, Ljiljana M
![](/themes/MirageRIMSI/images/orcid.png)
Radmilović, Velimir R
Vračar, Ljiljana M
![](/themes/MirageRIMSI/images/orcid.png)
Krstajić, Nedeljko V
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Article (Published version)
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The influence of poisoning of Pt catalyst by CO on the kinetics and mechanism of H-2 oxidation reaction (HOR) at Pt/C electrode in 0.5 mol dm(-3) HClO4, saturated with H-2 containing 100 ppm CO, was examined with rotating disc electrode (RDE) at 22 degrees 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 (l(k)) for the HOR at Pt/C decreases significantly at CO coverage (Theta(co)) > 0.6. For Theta(co) lt 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).
Keywords:
RDE / Pt nanosized catalyst / Mechanism / Hydrogen oxidation / CO adsorptionSource:
Electrochimica Acta, 2009, 54, 4, 1375-1382Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
Funding / projects:
- Sinteza, karakterizacija i primena nanostruktuiranih katalizatora na različitim nosačima u gorivnim spregovima, elektrolizi vode i elektroorganskoj sintezi (RS-MESTD-MPN2006-2010-142038)
DOI: 10.1016/j.electacta.2008.08.067
ISSN: 0013-4686
WoS: 000262810900031
Scopus: 2-s2.0-57749182921
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Institut za multidisciplinarna istraživanjaTY - JOUR AU - Elezović, Nevenka R. AU - Gajić-Krstajić, Ljiljana M AU - Radmilović, Velimir R AU - Vračar, Ljiljana M AU - Krstajić, Nedeljko V PY - 2009 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/322 AB - The influence of poisoning of Pt catalyst by CO on the kinetics and mechanism of H-2 oxidation reaction (HOR) at Pt/C electrode in 0.5 mol dm(-3) HClO4, saturated with H-2 containing 100 ppm CO, was examined with rotating disc electrode (RDE) at 22 degrees 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 (l(k)) for the HOR at Pt/C decreases significantly at CO coverage (Theta(co)) > 0.6. For Theta(co) lt 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). PB - Pergamon-Elsevier Science Ltd, Oxford 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 ER -
@article{ author = "Elezović, Nevenka R. and Gajić-Krstajić, Ljiljana M and Radmilović, Velimir R and Vračar, Ljiljana M and Krstajić, Nedeljko V", year = "2009", abstract = "The influence of poisoning of Pt catalyst by CO on the kinetics and mechanism of H-2 oxidation reaction (HOR) at Pt/C electrode in 0.5 mol dm(-3) HClO4, saturated with H-2 containing 100 ppm CO, was examined with rotating disc electrode (RDE) at 22 degrees 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 (l(k)) for the HOR at Pt/C decreases significantly at CO coverage (Theta(co)) > 0.6. For Theta(co) lt 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).", publisher = "Pergamon-Elsevier Science Ltd, Oxford", 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" }
Elezović, N. R., Gajić-Krstajić, L. M., Radmilović, V. R., Vračar, L. M.,& Krstajić, N. V.. (2009). Effect of chemisorbed carbon monoxide on Pt/C electrode on the mechanism of the hydrogen oxidation reaction. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 54(4), 1375-1382. https://doi.org/10.1016/j.electacta.2008.08.067
Elezović NR, Gajić-Krstajić LM, Radmilović VR, Vračar LM, Krstajić NV. 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 .
Elezović, Nevenka R., Gajić-Krstajić, Ljiljana M, Radmilović, Velimir R, Vračar, Ljiljana M, Krstajić, Nedeljko V, "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 . .