Preparation and characterization of carbon-supported Pt-Au cathode catalysts for oxygen reduction reaction

Chen Wei Liu, Yu Chen Wei, Kuan Wen Wang

研究成果: 雜誌貢獻期刊論文同行評審

28 引文 斯高帕斯(Scopus)

摘要

Alloy catalysts of Pt-Au/C with various Pt/Au ratios were prepared for an oxygen reduction reaction (ORR). The structure, surface species, surface compositions, and electrocatalytic activities of prepared alloy catalysts were characterized by XRD, TPR, XPS, and rotating disk electrode (RDE) techniques, respectively. It was observed that the ORR activity of the Pt75Au25/C alloy catalyst was enhanced significantly in comparison to the commercial Pt/C catalyst within the mixed kinetic-diffusion control region. The alloying with Au modified the oxophilicity of Pt-Au alloy catalysts. TPR characterization suggests that the enhancement of Pt75Au25/C was attributed to the formation of an alloy surface, having a moderate oxophilicity and a Pt-related alloy surface species.

原文???core.languages.en_GB???
頁(從 - 到)654-657
頁數4
期刊Journal of Colloid and Interface Science
336
發行號2
DOIs
出版狀態已出版 - 15 8月 2009

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