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Title: Investigating the performance of catalyst layer micro-structures with different platinum loadings

In this study a four-phase micro-structure of a PEFC catalyst layer was reconstructed by randomly placing overlapping spheres for each solid catalyst phase. The micro-structure was mirrored to make a micro-structure. A body-fit computational mesh was produced for the reconstructed micro-structure in OpenFOAM. Associated conservation equations were solved within all the phases with electrochemical reaction as the boundary condition at the interface between ionomer and platinum phases. The study is focused on the platinum loading of CL. The polarization curves of the micro-structure performance have been compared for different platinum loadings. This paper gives increased insight into the relatively greater losses at decreased platinum loadings.
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Journal Name: ECS Transactions; Journal Volume: 50; Journal Issue: 2; Conference: 222nd ECS Meeting, Honolulu, Hawai’I, October 7 -12, 2012
Research Org:
Ballard Power Systems, Burnaby, BC
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
08 HYDROGEN; micro-structure; OpenFOAM; Pt loading; catalyst layer; polarization; performance; PEMFC