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The degradation study of the MEA for PEMFC under low humidity conditions was conducted. The MEA degradation was observed during low humidity open circuit voltage tests. In order to investigate the degradation mechanism, we conducted ESR studies of the degenerated MEA, and confirmed the formation of radicals in the catalyst layers. The MEA degradation mechanism that includes the radical formation reaction was verified.
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Eiji Endoh (2004) studied this question.
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