Carbon-supported Pt-Fe alloy as a methanol-resistant oxygen-reduction catalyst for direct methanol fuel cells

被引：147
作者：
Shukla, AK [1 ]
Raman, RK
Choudhury, NA
Priolkar, KR
Sarode, PR
Emura, S
Kumashiro, R
机构：
[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India
[2] Goa Univ, Dept Phys, Taleigao Plataeu 403206, Goa, India
[3] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan
[4] Osaka City Univ, Fac Sci, Dept Mat Sci, Sumiyoshi Ku, Osaka 5588585, Japan
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2004年 / 563卷 / 02期
关键词：
Pt-Fe alloy; oxygen-reduction catalyst; direct methanol fuel cells; X-ray photoelectron spectroscopy; X-ray absorption spectroscopy;
D O I：
10.1016/j.jelechem.2003.09.010
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Crossover of methanol from the anode to the cathode through the polymer-electrolyte membrane in solid-polymer-electrolyte direct methanol fuel cells constitutes a significant loss in their performance. Pt/C and Pt-Fe/C electrocatalysts have been characterized by X-ray diffraction, and X-ray photoelectron and X-ray absorption spectroscopies in conjunction with electrochemistry. It is found that Pt-Fe/C alloy crystallizing in an ordered face centered tetragonal crystal structure with higher proportions of active-platinum sites and a completely different nearest neighbour environment than Pt/C exhibits significantly high oxygen-reduction activity in the presence of methanol while Pt/C shows a methanol poisoning effect under similar conditions. (C) 2003 Elsevier B.V. All rights reserved.
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收藏
页码：181 / 190
页数：10
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