INVESTIGATIONS OF THE COOXIDATION ON PT WITH LITHIUM FIELD DESORPTION MICROSCOPY

被引：20

作者：

MEDVEDEV, VK ^{[1
]}

SUCHORSKI, Y ^{[1
]}

BLOCK, JH ^{[1
]}

机构：

[1] MAX PLANCK GESELL,FRITZ HABER INST,FARADAYWEG 4-6,D-14195 BERLIN,GERMANY

来源：

APPLIED SURFACE SCIENCE | 1994年 / 76卷 / 1-4期

关键词：

D O I：

10.1016/0169-4332(94)90334-4

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 clean, carbon monoxide- and oxygen-covered surfaces of a [110]-oriented Pt tip were studied in the lithium field desorption microscope (Li FDM). Surface diffusion of Li on clean, carbon monoxide- and oxygen-covered Pt surfaces was investigated with field electron microscopy. A correlation between the peculiarities of the field-stimulated surface diffusion of Li on surfaces of bcc and fcc crystals, and the different mechanism of Li FDM image formation of W and Pt are observed and discussed in terms of sub- and multilayer Li surface diffusion. The catalytical CO-oxidation reaction on Pt was visualized in Li FDM. The influence of the Li on the CO-oxidation process was observed and discussed on the basis of present experimental data and known alkali-gas coadsorption properties.

引用

页码：136 / 144

页数：9

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