Pt<inf>1-x</inf>Co<inf>x</inf> nanoparticles as cathode catalyst for proton exchange membrane fuel cells with enhanced catalytic activity

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Journal Article
Materials Chemistry and Physics, 2010, 124 (1), pp. 841 - 844
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Nanosize carbon-supported Pt1-xCox (x = 0.2, 0.3, and 0.45) electrocatalysts were prepared by a chemical reduction method using sodium borohydride (NaBH4) as the reduction agent. Transmission electron microscopy examination showed uniform dispersion of Pt 1-xCox alloy catalysts on carbon matrix, with the particle size less than 10 nm. The electrochemical characteristics of Pt 1-xCox alloy catalysts were studied by cyclic voltammetry, linear sweep voltammetry, and chronoamperometric testing. The as-prepared Pt1-xCox alloy nanoparticles could be promising cathode catalysts for oxygen reduction in proton exchange membrane fuel cells with the feature of much reduced cost, but significantly increased catalytic activity. © 2010 Elsevier B.V. All rights reserved.
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