CO dissociation on NiZr alloys studied by photoemission and electronic structure calculations |
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Authors: | D. Tománek R. Hauert P. Oelhafen R. Schlögl H.-J. Güntherodt |
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Affiliation: | Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, D - 1000 Berlin 33, Germany;Institut für Physik, Universität Basel, Klingelbergstrasse 82, CH - 4056 Basel, Switzerland |
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Abstract: | We present a photoemission study of the CO adsorption on amorphous NiZr alloys at various compositions. Our results indicate a distinct enhancement of dissociative adsorption even at very low Zr concentrations. These observations are supported by LCAO-type calculations of potential energy surfaces, which suggest a strong increase of backdonation into antibonding type orbitals near Zr sites. |
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