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Co-Adsorption on Metal-Oxide Crystal Surfaces

Cases of CO/Cu/ZnO(0001) and CO2/Na/TiO2(110)

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Chemisorption and Reactivity on Supported Clusters and Thin Films

Part of the book series: NATO ASI Series ((NSSE,volume 331))

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Abstract

Coadsorption on metal-oxide crystal surfaces is discussed for two model catalyst examples in which a (CO −2 ) complex is involved: 1) Adsorption of CO onto Cu clusters and thin films supported by a thermally etched (0001) surface of a ZnO single crystal and 2) Adsorption of CO2 onto Na clusters and thin films supported by 1×1- and 1×2- terminated (110) surfaces of a TiO2 single crystal.

In the former case we will apply electron spectroscopy results from adsorption of CO on clean and Cu-deposited Zn0(0001) surfaces to discuss evidence for formation of a (CO −2 ) chemisorption complex and for Cu oxidation during CO exposure.

In the latter case we will apply synchrotron-radiation-induced core-level-, valenceband and resonant photoemission results from adsorption of CO2 on a 1×1 truncated and on a 1×2 reconstructed TiO2(110) surface to discuss the difference in Na adsorption behavior of the two surfaces (adsorption onto two different sites) and the strong reactivity towards CO2 when submonolayer quantities of Na are preadsorbed.Valence-band data shows formation of carbonate. At low coverage the presence of a (CO −2 ) complex suggests a 2CO −2 →CO −3 + CO reaction.

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Authors and Affiliations

  1. Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, Denmark

    P. J. Møller

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Editors and Affiliations

  1. Department of Chemistry, University of Cambridge, Cambridge, UK

    Richard M. Lambert

  2. Department of Inorganic, Organometallic and Analytical Chemistry, University of Milan, Milan, Italy

    Gianfranco Pacchioni

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Møller, P.J. (1997). Co-Adsorption on Metal-Oxide Crystal Surfaces. In: Lambert, R.M., Pacchioni, G. (eds) Chemisorption and Reactivity on Supported Clusters and Thin Films. NATO ASI Series, vol 331. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8911-6_10

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  • DOI: https://doi.org/10.1007/978-94-015-8911-6_10

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-4807-3

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