Novel electrocatalysts for direct methanol fuel cells

被引：158

作者：

Chu, D ^{[1
]}

Jiang, RZ ^{[1
]}

机构：

[1] USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA

来源：

SOLID STATE IONICS | 2002年 / 148卷 / 3-4期

关键词：

polymer electrolyte membrane fuel cell; methanol fuel cell; catalyst; metalloporphyrins; electrode probe scan;

D O I：

10.1016/S0167-2738(02)00124-8

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：

Methanol-tolerant catalysts were successfully prepared by heat treatment (HT) of a series of single transition metalloporphyrins (V, Mn, Fe, Co, Ni, Cu and Zn) and combination of two transition metalloporphyrins (V/Fe, Co/Fe, Ni/Fe and Cu/Fe). Performance of oxygen reduction in heat-treated metalloporphyrins was evaluated by means of a rotating disk electrode in acid electrolyte with and without methanol. HT-FeTPP/CoTPP is the best catalyst for oxygen reduction, An oxygen reduction mechanism for the heat-treated binary metalloporphyrins is also proposed. The Pt-Ru alloy with an atomic ratio of 50:50 gives the best performance at higher over-potential and high current regions while an atomic ratio of 65:35 shows the best performance at the low over-potential and low current regions. A high surface area of Pt-Ru-Os anode catalyst is synthesized. A single MEA (membrane electrode assembly) methanol fuel cell performance for ARL's Pt-Ru-Os anode shows a very superior performance when compared to a commercial Pt-Ru anode. (C) Published by Elsevier Science B.V.

引用

页码：591 / 599

页数：9

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