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Abstract

Differently prepared coadsorbate layers of H and CO on Ni(110) were investigated by thermal desorption, low-energy electron diffraction, ultraviolet photoemission and inverse photoemission. Cluster calculations were also carried out in order to model the electronic structure of the mixed CO-H layer on this surface, and to investigate the effects of H coadsorption on bond lengths and the corresponding stretching vibrations. Evidence of a strong local CO-H interaction was found. No global H-induced effects, such as d-band filling, were necessary for the interpretation of the photoemission spectra. Moreover, neither changes in the long-range order of the coadsorbate layer nor a surface reconstruction seemed to affect profoundly the character of the CO-H interaction. This supports the assumption of a local interaction mechanism.

Additional information

Authors: RANGELOV G, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);BISCHLER U, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);MEMMEL N, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);BERTEL E, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);DOSE V, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);PABST M, Technische Universität München, Lehrstuhl für Theoretische Chemie (DE);RÖSCH N, Technische Universität München, Lehrstuhl für Theoretische Chemie (DE);ROSCH N, Technische Universitat Munchen, Lehrstuhl fur Theoretische Chemie (DE)
Bibliographic Reference: Article: Surface Science (1992) No. 273, pp. 61-72
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