Composition-controlled synthesis of carbon-supported Pt–Co alloy nanoparticles and the origin of their ORR activity enhancement

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Abstract
The mass-specific activities of the Pt–Co alloy catalysts manifest a typical double-volcano plot as a function of alloy compositions. The Pt76Co24exhibits the best ORR performance, which is remarkably higher than that of the commercial Pt/C (E-TEK). The origin of the enhancement in the ORR activity may be substantially related to the unique chemical surface structures of catalysts.

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