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

被引：148

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.

引用

页码：181 / 190

页数：10

共 55 条

[1] On the origin of the selectivity of oxygen reduction of ruthenium-containing electrocatalysts in methanol-containing electrolyte [J].