Effects of the surface area of carbon support on the characteristics of highly-dispersed Pt-Ru particles as catalysts for methanol oxidation

被引:150
作者
Takasu, Y [1 ]
Kawaguchi, T [1 ]
Sugimoto, W [1 ]
Murakami, Y [1 ]
机构
[1] Shinshu Univ, Fac Text Sci & Technol, Dept Fine Mat Engn, Ueda, Nagano 3868567, Japan
关键词
methanol; PtRu catalyst; oxidation; carbon black; carbon monoxide; fuel cell; DMFC;
D O I
10.1016/S0013-4686(03)00521-8
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Considerable effects have been observed for the specific surface area of carbon black support on the fundamental properties of PtRu/C catalysts, such as metal particle size, extent of alloying and catalytic activity for the oxidation of methanol. Equimolar ethanolic solutions of Pt(NH3)(2)(NO2)(2) and RuNO(NO3)(x) and seven different carbon black supports with specific surface areas ranging from 29 to 802 m(2) g(-1) were used for the preparation of the catalysts by the co-impregnation method. COad stripping voltammetry was adopted for the investigation of the effects of the specific surface area of the carbon black on the catalytic activity of the PtRu/C catalysts as well as for the determination of the actual exposed surface area of the bimetallic particles. A size effect of the PtRu particles on the catalytic activity for the oxidation of methanol was also observed. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3861 / 3868
页数:8
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