STM studies of methanol oxidation to formate on Cu(110) surfaces: II. codosing experiments

被引：20

作者：

Silva, SL ^{[1
]}

Lemor, RM ^{[1
]}

Leibsle, FM ^{[1
]}

机构：

[1] Univ Missouri, Dept Phys, Kansas City, MO 64110 USA

来源：

SURFACE SCIENCE | 1999年 / 421卷 / 1-2期

关键词：

copper; formate; methanol; methoxy; scanning tunneling microscopy;

D O I：

10.1016/S0039-6028(98)00845-0

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：

We have used STM to study Cu(110) surfaces exposed to mixtures of oxygen and methanol (CH3OH, CD3OD, and CD,OH), attempting to follow the methodologies employed by recent XPS and TPD studies of this system. We find that whereas some methoxy and formate can be produced by exposing these surfaces to methanol/oxygen mixtures, prolonged exposure results in primarily oxygen-covered surfaces. We explain this by demonstrating the ability of oxygen to apparently displace methoxy from these surfaces. Subtle differences have been observed, depending on whether CH3OH or CD3OH is used. We demonstrate that attempts to codose oxygen and methanol while simultaneously using the STM to image the surface can affect the local surface topography, resulting in the creation of areas that are unrepresentative of the surface as a whole. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：146 / 156

页数：11

共 17 条

[1] Controlling reaction selectivity in the oxidation of methanol at Cu(110) surfaces - Comment [J].