Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5426895 | Surface Science | 2006 | 7 Pages |
Abstract
Global and local oscillations in the CO oxidation reaction have been visualized in situ on the apex of a [1Â 0Â 0]-oriented Pt field emitter tip used as a well-defined model for catalytically active, nm-sized particles by Field Emission (FEM) and Lithium Field Desorption (Li-FDM) Microscopes. For the first time experimental evidence is provided that the reconstruction feedback mechanism of the self-maintained oscillations for the [1Â 0Â 0] and [1Â 1Â 0] orientations, which is well established on macroscopic single crystals, is also valid in the heterogeneous, nm-sized system with its different crystallographic orientations which are coupled by surface diffusion.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Y. Suchorski, W. Drachsel, V.V. Gorodetskii, V.K. Medvedev, H. Weiss,