Carbon supported Pt-Co alloys electrocatalysts for as methanol-resistant oxygen-reduction direct methanol fuel cells

被引：144
|
作者：
Salgado, JRC
Antolini, E
Gonzalez, ER
机构：
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
[2] Scuola Sci Mat, I-16016 Genoa, Italy
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2005年 / 57卷 / 04期
基金：
巴西圣保罗研究基金会;
关键词：
Pt-Co/C alloy; oxygen reduction electrocatalyst; direct methanol fuel cells;
D O I：
10.1016/j.apcatb.2004.11.009
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 electrocatalysis of the oxygen reduction reaction on carbon supported Pt and Pt-Co (Pt/C and Pt-Co/C) alloy electrocatalysts was investigated in sulphuric acid (both in the absence and in the presence of methanol) and in direct methanol fuel cells (DMFCs). In pure sulphuric acid Pt-Co/C alloys showed improved specific activity towards the oxygen reduction compared to pure platinum. In the methanol containing electrolyte a higher methanol tolerance of the binary electrocatalysts than Pt/C was observed. The onset potential for methanol oxidation at Pt-Co/C was shifted to more positive potentials. Accordingly, Pt-Co/C electrocatalyts showed an improved performance as cathode materials in DMFCs. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：283 / 290
页数：8
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