Formation of surface oxides on Pt(100) during CO oxidation in the millibar pressure range

被引：34

作者：

Dicke, J

Rotermund, HH

Lauterbach, J

机构：

[1] Max Planck Soc, Fritz Haber Inst, D-14195 Berlin, Germany

[2] Purdue Univ, Sch Elect Engn, W Lafayette, IN 47907 USA

来源：

SURFACE SCIENCE | 2000年 / 454卷 / 01期

基金：

美国国家科学基金会;

关键词：

Auger electron spectroscopy; carbon monoxide; catalysis; oxidation; platinum; solid-gas interfaces; surface chemical reaction; thermal desorption spectroscopy;

D O I：

10.1016/S0039-6028(00)00189-8

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：

CO oxidation on Pt(100) at oxygen pressures of 9.0 x 10(-2) mbar was studied. An unusual decrease in catalytic activity with time was observed, which has not been observed at lower pressures. Post-reaction Auger and thermal desorption spectroscopy measurements showed the formation of a surface oxide species, which deactivated the catalyst. The surface oxide is compared to subsurface oxygen and to surface oxide studied previously on low index Pt single crystal surfaces. An adsorbate induced surface reconstruction is proposed as a possible driving force for oxide formation. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：352 / 357

页数：6

共 31 条

[1] THE ADSORPTION OF CO, O2, AND H-2 ON PT(100)-(5X20) [J].