Pt dissolution and further precipitation within the membrane of proton exchange membrane fuel cells (PEMFCs) was investigated at open-circuit voltage conditions. It was found that the location of Pt precipitation is affected by both and permeability through the membrane. A simple model is developed that can predict the location of the Pt precipitation band as a function of and partial pressure, which agrees well with measurements. The implications of Pt deposition on membrane chemical degradation are briefly discussed.
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Zhang et al. (2007) studied this question.
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