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Towards Physical Descriptors of Active and Selective Catalysts for the Oxidation of n-Butane to Maleic Anhydride

Authors

  • Dr. Maik Eichelbaum,

    Corresponding author
    1. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) (0)30 84134401
    • Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) (0)30 84134401
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  • Prof. Robert Glaum,

    1. Institute for Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn (Germany)
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  • Dr. Michael Hävecker,

    1. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) (0)30 84134401
    2. Solar Energy Research, Helmholtz-Zentrum Berlin/BESSY II, Albert-Einstein-Straße 15, 12489 Berlin (Germany)
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  • Knut Wittich,

    1. Institute for Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn (Germany)
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  • Christian Heine,

    1. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) (0)30 84134401
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  • Heiner Schwarz,

    1. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) (0)30 84134401
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  • Cornelia-Katharina Dobner,

    1. Process Research and Engineering, BASF SE, Carl-Bosch-Straße 38, 67056 Ludwigshafen (Germany)
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  • Dr. Cathrin Welker-Nieuwoudt,

    1. Process Research and Engineering, BASF SE, Carl-Bosch-Straße 38, 67056 Ludwigshafen (Germany)
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  • Dr. Annette Trunschke,

    1. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) (0)30 84134401
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  • Prof. Robert Schlögl

    1. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany), Fax: (+49) (0)30 84134401
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Abstract

Based on our newly developed microwave cavity perturbation technique, the microwave conductivity of diverse vanadium(III), (IV), and (V) phosphate catalysts was measured under reaction conditions for the selective oxidation of n-butane. The conductivity response on the gas phase was identified as a very sensitive measure for the redox kinetics, reversibility, and stability of the samples, which are important prerequisites for highly selective and active catalysts. The sensitivity achieved by our method was comparable to surface-sensitive methods such as X-ray photoelectron spectroscopy, whereas more conventional analytic techniques such as X-ray diffractometry or Raman spectroscopy only indicated the stability of the bulk crystal phase under the same reaction conditions.

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