Synthesis of highly dispersed Pt/C electrocatalysts in ethylene glycol using acetate stabilizer for methanol electrooxidation
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Pt/C electrocatalysts were prepared from a solution of H2PtCl6 in ethylene glycol in the presence of XC-72 carbon by adding a small amount of sodium acetate as stabilizer. Repeated TEM images showed that the platinum nanoparticles were small and uniform in size and highly dispersed on XC-72 carbon supports when a small amount of sodium acetate solution was added to the synthesis solution. The Pt/C electrocatalysts exhibited very high electrocatalytic activity for liquid methanol oxidation. The effects of adding acetate on Pt particle size and size distribution are discussed. It is demonstrated that acetate can be used as a good stabilizer for preparing Pt/C catalyst with fine and uniform Pt particles.
Keywordscarbon supports electrocatalysts ethylene glycol fuel cell platinum nanoparticles
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This work was supported by the Research Fund for the Doctoral Program of Higher Education (No. 2005335086), Zhejiang Provincial Natural Science Foundation (No. Y404265 and 200053) and Scientific Research Foundation for Returned Overseas Chinese Scholars of the State Education Ministry (No. 2004-527).
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