Electrocatalytic activity of PtRu alloy colloids for CO and CO/H-2 electrooxidation: Stripping voltammetry and rotating disk measurements

被引:203
作者
Schmidt, TJ
Noeske, M
Gasteiger, HA
Behm, RJ
Britz, P
Brijoux, W
Bonnemann, H
机构
[1] UNIV ULM,ABT OBERFLACHENCHEM & KATALYSE,D-89069 ULM,GERMANY
[2] MAX PLANCK INST KOHLENFORSCH,D-45470 MULHEIM,GERMANY
关键词
D O I
10.1021/la962068r
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The electrocatalytic activity of a bimetallic Pt0.5Ru0.5N(Oct(4))Cl colloid toward the oxidation of CO and a CO/H-2 gas mixture (simulated reformer gas) was measured. The particle size distribution with a mean diameter of 1.7 +/- 0.5 nm was determined by high-resolution transmission electron microscopy, and the formation of stoichiometrically alloyed particles was verified by point-resolved energy dispersive X-ray analysis. The GO-stripping voltammetry of glassy carbon supported Pt0.5Ru0.5 clusters was found to be in excellent agreement with GO-stripping voltammetry data measured on well-characterized bulk alloy electrodes. The activity of the colloid toward the continuous oxidation of 2% CO in H-2 was assessed in a rotating disk electrode configuration at 25 degrees C in 0.5 M H2SO4, leading to the conclusion that PtRu colloids are a promising route toward the preparation of bimetallic high-surface-area fuel cell catalysts.
引用
收藏
页码:2591 / 2595
页数:5
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