CHARACTERIZATION OF GRAPHITE-SUPPORTED PLATINUM CATALYSTS BY ELECTROCHEMICAL METHODS AND XPS

被引：17
|
作者：
DEBRUIJN, FA [1 ]
MARIN, GB [1 ]
NIEMANTSVERDRIET, JW [1 ]
VISSCHER, WHM [1 ]
VANVEEN, JAR [1 ]
机构：
[1] EINDHOVEN UNIV TECHNOL,SCHUIT INST CATALYSIS,POB 513,5600 MB EINDHOVEN,NETHERLANDS
来源：
SURFACE AND INTERFACE ANALYSIS | 1992年 / 19卷 / 1-12期
关键词：
D O I：
10.1002/sia.7401901100
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：
X-ray photoelectron spectroscopy and cyclic voltammetry have been used to characterize 4.9 wt.% platinum-on-graphite catalysts used for the oxidation with molecular oxygen of methyl alpha-D-glucoside in aqueous solution. Cyclic voltammetry indicates that a surface oxidic layer is formed on the platinum particles upon exposure to ambient air. This oxidation could not be confirmed by XPS, however. The oxidation of methyl alpha-D-glucoside in the liquid phase is accompanied by growth of the platinum particles. Open-circuit potential measurements indicated an increasing oxygen coverage of the platinum surface during reaction.
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收藏
页码：537 / 542
页数：6
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