Electrochemical and Solid-State Letters · 2008 · 12 citations · 25 references
Materials ScienceOxygen Reduction ReactionChemical EngineeringCatalytic MembraneEngineeringMembrane LifeLeachingCatalyst RecyclingProton-exchange MembranePt–alloy CatalystsCatalysisCatalyst ImpactChemistryNafion 111Electrochemistry
Catalyst impact on membrane life was examined using inductively coupled plasma spectroscopy, hydrogen peroxide soak, and open-circuit decay. The catalysts PtFe/C and PtNi/C were found to leach less platinum than Pt/C. Nafion in hydrogen peroxide with emitted less fluoride than with . At open circuit, Nafion 111 was found to fail at , 315, and 520 h with PtFe/C, Pt/C, and PtNi/C cathodes, respectively, at . It is hypothesized that if the leached cation does not directly impact the membrane decay, e.g., a "poor Fenton reagent," then other cations such as dissolved platinum ions may become critical.
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