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Carbon supported platinum metal alloy catalysts (Pt–M/C) are widely used in low temperature fuel cells. Pt alloyed with first-row transition elements is used as improved cathode material for low temperature fuel cells. A major challenge for the application of Pt–transition metal alloys in phosphoric acid (PAFC) and polymer electrolyte membrane (PEMFC) fuel cells is to improve the stability of these...
Changes in the electronic states of platinum–cobalt (Pt–Co) alloy catalysts through potential cycling between 0.6 and 1.0V were investigated by X-ray photoemission spectroscopy (XPS) using synchrotron radiation. The electrochemical surface area loss and the particle size growth of the Pt catalyst were larger than those of the Pt–Co alloy catalyst. Pt 4f XPS spectra of the Pt–Co alloy catalyst do not...
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