Macroscopic Modeling of the Proton-Exchange-Membrane Fuel-Cell Catalyst Layer
Date Published |
04/2012
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Publication Type | Journal Article
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Author | |
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DOI |
10.1149/1.3701969
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Abstract |
In the catalyst layers, all of the various phases of a fuel cell exist. Thus, there is membrane, gas, liquid, and solid (mainly carbon). In addition, there are electrocatalysts where the charge-transfer reactions take place. An accurate model of a catalyst layer requires that all of these phases and their various interactions be modeled from a physical perspective. In this transaction, the macroscopic modeling approaches towards a catalyst layer will be discussed. Specifically, the modeling and multi-scaling of catalyst-layer phenomena will be introduced including accounting of Pt-oxide formation and non-unity reaction orders in a simultaneous reaction/diffusion framework. Of particular interest is the modeling and accounting of recently observed unexpected mass-transport limitations at very low Pt loadings. |
Journal |
ECS Transactions
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Volume |
45
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Year of Publication |
2012
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Issue |
2
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Pagination |
71 - 83
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ISSN Number |
1938-6737
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Short Title |
ECS Transactions
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Organizations | |
Research Areas | |
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