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The CO Poisoning Mechanism of the Hydrogen Oxidation Reaction in Proton Exchange Membrane Fuel Cells
Open accessAbstract
The CO tolerance mechanism of the hydrogen oxidation reaction was investigated on several highly dispersed carbon-supported nanocrystalline Pt and binary Pt alloys. For this purpose, current/potential behavior was derived from half-cells under actual proton exchange membrane fuel cell operating conditions and correlated with expressions derived from kinetic models. Kinetic analyses have shown that the CO poisoning effect on Pt/C, PtRu/C, and PtSn/C catalysts occurs through a free Pt site attack mechanism, involving bridge- and linear-bonded adsorbed CO. For all catalysts, the onset of CO oxidation occurs via the bridge-bonded species, but for PtRu/C and PtSn/C, the reaction starts at smaller potentials. Under this condition, the hydrogen oxidation currents are generated on the vacancies of a carbon monoxide adsorbed layer created when some of the bridge-bonded CO molecules are oxidized. The linearly adsorbed CO is oxidized at higher overpotentials, leading to an increase of the holes on the CO layer and thus of the rate of the hydrogen oxidation process. © 2002 The Electrochemical Society. All rights reserved.
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Cites
Particle Size Effects for Oxygen Reduction on Highly Dispersed Platinum in Acid Electrolytes
Kinoshita, K. (1990) · Journal of The Electrochemical Society · doi:10.1149/1.2086566 · Cited by 854
Cited by
Platinum-Based Nanostructured Materials: Synthesis, Properties, and Applications
Chen, A., & Holt-Hindle, P. (2010) · Chemical Reviews · doi:10.1021/cr9003902 · Cited by 1,390
Strongly Coupled Inorganic/Nanocarbon Hybrid Materials for Advanced Electrocatalysis
Liang, Y., Li, Y., Wang, H., & Dai, H. (2013) · Journal of the American Chemical Society · doi:10.1021/ja3089923 · Cited by 937
Competition between CO 2 Reduction and H 2 Evolution on Transition-Metal Electrocatalysts
Zhang, Y.-J., Sethuraman, V., Michalsky, R., & Peterson, A. A. (2014) · ACS Catalysis · doi:10.1021/cs5012298 · Cited by 509
Ultralow platinum loading proton exchange membrane fuel cells: Performance losses and solutions
Banham, D., Zou, J., Mukerjee, S., Liu, Z., Yang, D., Zhang, Y., Peng, Y., & Dong, A. (2021) · Journal of Power Sources · doi:10.1016/j.jpowsour.2021.229515 · Cited by 103
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Metadata
- Authors
- Camara, G. A., Ticianelli, E. A., Mukerjee, S., Lee, S. J., & McBreen, J.
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 2002
- Volume
- 149
- Issue
- 6
- Pages
- A748
- ISSN
- 0013-4651 (ISSN-L)
- OpenAlex
- W2049639995
- Cited by
- 201
- References
- 1
- FWCI
- 6.79
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Camara, G. A., Ticianelli, E. A., Mukerjee, S., Lee, S. J., & McBreen, J. (2002). The CO Poisoning Mechanism of the Hydrogen Oxidation Reaction in Proton Exchange Membrane Fuel Cells. Journal of The Electrochemical Society. https://doi.org/10.1149/1.1473775
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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