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

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Medvedev,  V. K.
Institute of Physics, Ukrainian Academy of Sciences;
Fritz Haber Institute, Max Planck Society;

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Suchorski,  Yu
Technical University of Lviv;
Fritz Haber Institute, Max Planck Society;

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Block,  Jochen H.
Fritz Haber Institute, Max Planck Society;

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Citation

Medvedev, V. K., Suchorski, Y., & Block, J. H. (1994). Investigations of the CO-oxidation on Pt with lithium field desorption microscopy. Applied Surface Science, 76-77, 136-144. doi:10.1016/0169-4332(94)90334-4.


Cite as: https://hdl.handle.net/21.11116/0000-0009-943C-D
Abstract
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.