An XPS study on binary and ternary alloys of transition metals with platinized carbon and its bearing upon oxygen electroreduction in direct methanol fuel cells

被引：254

作者：

Shukla, AK ^{[1
]}

Neergat, M ^{[1
]}

Bera, P ^{[1
]}

Jayaram, V ^{[1
]}

Hegde, MS ^{[1
]}

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2001年 / 504卷 / 01期

关键词：

electrocatalysis; alloy electrocatalysts; X-ray photoelectron spectroscopy; oxygen-reduction reaction; direct methanol fuel cells;

D O I：

10.1016/S0022-0728(01)00421-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The present X-ray photoelectron spectroscopic study on carbon-supported Pt, Pt-Cr, Pt-Co, Pt-Ni, Pt-Co-Cr and Pt-Co-Ni electrocatalysts suggests that while Pt-Cr/C, Pt-Co/C and Pt-Ni/C binary alloy electrocatalysts are surface rich in platinum, both Pt-Co-Cr/C and Pt-Co-Ni/C ternary electrocatalysts happen to be surface rich in base metals. Among these electrocatalysts, Pt-Co/C electrocatalyst is found to possess a minimum amount of platinum oxides. Accordingly, Pt-Co/C exhibits a higher electrocatalytic activity towards oxygen-reduction reaction in the solid-polymer-electrolyte direct methanol fuel cells. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：111 / 119

页数：9

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