Electrocatalytic enhancement of methanol oxidation by graphite nanofibers with a high loading of PtRu alloy nanoparticles

被引：98

作者：

Park, In-Su

Park, Kyung-Won

Choi, Jong-Ho

Park, Chong Rae

Sung, Yung-Eun ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, Res Ctr Energy Convers & Storage, Seoul 151744, South Korea

[3] Soongsil Univ, Dept Chem & Environm Engn, Seoul 156743, South Korea

[4] Gwangju Inst Sci & Technol, Dept Mat Sci & Engn, Kwangju 500712, South Korea

[5] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151744, South Korea

[6] Seoul Natl Univ, HOMRC, Seoul 151744, South Korea

来源：

CARBON | 2007年 / 45卷 / 01期

关键词：

D O I：

10.1016/j.carbon.2006.08.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The geometric effect of graphite nanofibers (GNFs) as a support for PtRu electrocatalysts on the oxidation of methanol for direct methanol fuel cells (DMFCs) was studied using X-ray diffraction, field emission transmission electron microscopy (FETEM) and electrochemical measurements. A high loading of 60 wt% PtRu catalyst, which is readily applicable to DMFCs, was well dispersed on GNFs. Further, the shape of the supported metal particles was affected by interactions with the GNFs. Electrochemical analysis indicated that GNF-supported PtRu catalysts resulted in an increased catalytic activity of about 100% over that of Vulcan XC-72 supported catalysts. FETEM data indicate that the enhanced activities result from a geometric modification of the catalyst particles by specific interactions between the GNFs and the supported PtRu nanoparticles. (c) 2006 Published by Elsevier Ltd.

引用

页码：28 / 33

页数：6

共 29 条

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