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

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题名:	Preparation and characterization of carbon-supported Pt-Au cathode catalysts for oxygen reduction reaction
作者:	Liu,CW;Wei,YC;Wang,KW
贡献者:	化學工程與材料工程學系
关键词:	METHANOL FUEL-CELLS;TEMPERATURE-PROGRAMMED REDUCTION;NANOPARTICLE ELECTROCATALYSTS;PLATINUM;CO;GOLD;ALLOYS;TOLERANCE;PALLADIUM;PROMOTION
日期:	2009
上传时间:	2010-06-29 17:27:35 (UTC+8)
出版者:	中央大學
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. (C) 2009 Elsevier Inc. All rights reserved.
關聯:	JOURNAL OF COLLOID AND INTERFACE SCIENCE
显示于类别:	[化學工程與材料工程研究所] 期刊論文

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