ADSORPTION OF CO ON MG-PROMOTED CO(POLY)

被引：11

作者：

VAARI, J

VAARA, T

LAHTINEN, J

HAUTOJARVI, P

机构：

[1] Laboratory of Physics, Helsinki University of Technology, 02150 Espoo

来源：

APPLIED SURFACE SCIENCE | 1994年 / 81卷 / 03期

关键词：

D O I：

10.1016/0169-4332(94)90286-0

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：

The effect of Mg on CO adsorption on polycrystalline Co foil has been studied using XPS and TDS. Mg was found to increase the adsorption capacity of the surface, promote the dissociation, and affect the sticking coefficient. The Mg overlayer is partially oxidized due to CO dissociation. Heating of the system above room temperature results in further Mg-promoted dissociation of CO. With increasing Mg coverage, the TDS peak at 387 K corresponding to CO desorption from the clean surface is gradually replaced by a C + O recombination feature around 900 K. The recombination is triggered by the decomposition of the Mg suboxide, observed as Mg desorption simultaneously with CO desorption.

引用

页码：289 / 297

页数：9

共 22 条

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