Li-modified oscillations in CO oxidation on a Pt field emitter

Medvedev, V.K.; Suchorski, Yu

doi:10.1016/0039-6028(96)00729-7

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Li-modified oscillations in CO oxidation on a Pt field emitter

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Medvedev, V.K.
Fritz Haber Institute, Max Planck Society;

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Suchorski, Yu
Fritz Haber Institute, Max Planck Society;

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引用

Medvedev, V., & Suchorski, Y. (1996). Li-modified oscillations in CO oxidation on a Pt field emitter. Surface Science, 364(1), L540-L546. doi:10.1016/0039-6028(96)00729-7.

引用: https://hdl.handle.net/21.11116/0000-0009-BFB8-1

要旨

The first observations of Li-modified isothermal kinetic oscillations during CO oxidation on a Pt field emitter tip are reported. The oscillations are realized on the surface of a [111]-oriented Pt tip in the presence of a Li submonolayer coverage of about 2.5 × 10¹⁴cm⁻² and are compared to the corresponding Li-free oscillations occurring on the same tip. In both cases the oscillatory process is visualized using the field electron emission (FEM) mode of the lithium field desorption microscope (Li-FDM). The origin of the FEM imaging contrast of coadsorbed Li-CO and Li-O layers on Pt is clarified. The influence of the coadsorbed Li submonolayer on the oscillating behavior of CO oxidation on Pt is discussed.