Adsorbed water and CO on Pt electrode modified with Ru

被引：13

作者：

Futamata, Masayuki ^{[1
]}

Luo, Liqiang ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST, NARC, Tsukuba, Ibaraki 3058562, Japan

来源：

JOURNAL OF POWER SOURCES | 2007年 / 164卷 / 02期

基金：

日本学术振兴会;

关键词：

catalysis; fuel cell; bifunctional mechanism; ATTR-SEIRAS;

D O I：

10.1016/j.jpowsour.2006.10.079

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：

Highly sensitive ATR-SEIRA spectroscopy was exploited to elucidate water, CO and electrolyte anions adsorbed on the Ru modified Pt film electrode. CO on Ru domains was oxidized below ca. +0.3 V, followed by pronounced water adsorption. Since the oxidation potential of CO on Pt domain was significantly reduced compared to bare Pt, these water molecules on Ru. obviously prompt CO oxidation on adjacent Pt surface as consistent with the bifunctional mechanism. Diffusion of adsorbate from Ru to Pt surfaces was indicated in dilute CH3OH solution by spectral changes with potential. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：532 / 537

页数：6

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