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• W2067898413 abstract "The detaching behavior of catalyst layers in membrane electrode assembly (MEA) for PEM fuel cells could affect the lifetime of both catalyst layers and membranes. However, this issue is always neglected. Therefore, the study of detaching behavior of catalyst layer is very conducive to investigate the failure mechanism of fuel cells. The detaching of catalyst layers was simulated by dipping membrane electrode assemblies (MEAs) into H2O2 solution with or without Fe2+. We observed the presence of detaching of catalyst layers and found the varied detaching behaviors with different accelerated testing solutions: a layered-type detaching behavior is shown for the catalyst layer treated with 30% H2O2 solution, whereas a crack-like detaching behavior in the case of 30% H2O2 solution with Fe2+ species (or Fenton's test). At the same time, the layered-type detaching of catalyst layers has a higher detaching rate than the crack-like detaching. These detaching behaviors should have an inherent link to degradation of recast-ionomer (Nafion) films in catalyst layers. In addition, the effect of detaching behaviors of catalyst layers on the lifetime of fuel cells has been studied by hydrogen crossover measurement, and shows that, for the crack-like detaching, the membrane has a shorter lifetime than that for the layered detaching." @default.
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• W2067898413 date "2010-08-01" @default.
• W2067898413 modified "2023-10-18" @default.
• W2067898413 title "Detaching behaviors of catalyst layers applied in PEM fuel cells by off-line accelerated test" @default.
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• W2067898413 doi "https://doi.org/10.1016/j.ijhydene.2009.12.182" @default.
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