Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells

被引：59

作者：

Lin, SD

Hsiao, TC

Chang, JR

Lin, AS ^{[1
]}

机构：

[1] Ind Technol Res Inst, Energy & Resource Labs, Hsinchu, Taiwan

[2] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi, Taiwan

[3] Yuan Ze Univ, Dept Chem Engn, Chungli, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 01期

关键词：

D O I：

10.1021/jp982296p

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：

Two Pt-Ru/C catalysts, a commercial 20% Pt-10% Ru/C and a 10% Pt-5% Ru/C synthesized in house (YZU catalyst), were examined for the CO tolerance in polymer-electrolyte-membrane fuel cells (PEFCs). Both half-cell tests under 250 ppm of CO/H-2 and single-cell tests under 100 ppm of CO/H2 showed that the YZU catalyst had smaller increase in the overvoltage at a given current. The platinum-ruthenium microstructures of these two electrocatalysts in the fabricated electrodes were characterized by X-ray absorption spectroscopy (EXAFS). EXAFS indicated that there was no Pt-Ru metal-metal interaction in the commercial catalyst; instead, only ruthenium oxide signals were observed. On the other hand, the YZU catalyst contains a Pt-Ru bimetallic interaction as indicated by the X-ray absorption spectra. It was considered that the Pt-Ru alloy structure has better CO tolerance than nonalloy Pt-Ru structure.

引用

页码：97 / 103

页数：7

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