Investigations of the CO-oxidation on Pt with lithium field desorption microscopy

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 betwee...

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Bibliographic Details
Published in:Applied surface science 1994-03, Vol.76 (1-4), p.136-144
Main Authors: Medvedev, V.K., Suchorski, Yu, Block, J.H.
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Catalytic reactions
Chemistry
Exact sciences and technology
General and physical chemistry
Metals. Metallurgy
Solid-gas interface
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary: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.
ISSN:0169-4332
1873-5584
DOI:10.1016/0169-4332(94)90334-4