Resolving the Atomic Structure of Vanadia Monolayer Catalysts: Monomers, Trimers, and Oligomers on Ceria

Authors

  • Martin Baron,

    1. Fritz Haber Institute of the Max Planck Society, Chemical Physics Department, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) 30-8413-4105
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  • Heather Abbott Dr.,

    1. Fritz Haber Institute of the Max Planck Society, Chemical Physics Department, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) 30-8413-4105
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  • Oleksandr Bondarchuk Dr.,

    1. Fritz Haber Institute of the Max Planck Society, Chemical Physics Department, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) 30-8413-4105
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  • Dario Stacchiola Dr.,

    1. Fritz Haber Institute of the Max Planck Society, Chemical Physics Department, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) 30-8413-4105
    2. Present address: Michigan Technological University, Department of Chemistry, 1400 Townsend Dr., Houghton, MI 49931 (USA)
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  • Alexander Uhl Dr.,

    1. Fritz Haber Institute of the Max Planck Society, Chemical Physics Department, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) 30-8413-4105
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  • Shamil Shaikhutdinov Dr.,

    1. Fritz Haber Institute of the Max Planck Society, Chemical Physics Department, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) 30-8413-4105
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  • Hans-Joachim Freund Prof. Dr.,

    1. Fritz Haber Institute of the Max Planck Society, Chemical Physics Department, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) 30-8413-4105
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  • Cristina Popa Dr.,

    1. Humboldt-Universität zu Berlin, Department of Chemistry, Unter den Linden 6, 10009 Berlin (Germany)
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  • Maria Veronica Ganduglia-Pirovano Dr.,

    1. Humboldt-Universität zu Berlin, Department of Chemistry, Unter den Linden 6, 10009 Berlin (Germany)
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  • Joachim Sauer Prof. Dr.

    1. Humboldt-Universität zu Berlin, Department of Chemistry, Unter den Linden 6, 10009 Berlin (Germany)
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  • This work has been supported by the Deutsche Forschungsgemeinschaft (SFB 546, “Transition Metal Oxide Aggregates”). We recognize Dr. Helmut Kuhlenbeck for technical assistance at BESSY II. H.A. and D.S. gratefully acknowledge fellowship support by the Alexander von Humboldt Foundation.

Abstract

original image

On top of old ceria: Vanadyl-terminated monomers, trimers (see picture), and oligomers form on a CeO2(111) surface, and their atomic structure is resolved using a combination of high-level experimental and theoretical results. Ceria surfaces stabilize vanadia species in a +5 oxidation state, which wet and chemically reduce the ceria surface and probably play a crucial role in the reactivity of ceria-supported vanadia in oxidation reactions.

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