Heather Abbott-Lyon - The role of ceria in oxidative dehydrogenation on supported vanadia catalysts

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  Publication Details (including relevant citation   information):

  V. Ganduglia-Pirovano, C. Popa, J. Sauer, H.L.   Abbott, A. Uhl, M. Baron, D. Stacchiola, O. Bondarchuk,   S. Shaikhutdinov, and H.-J. Freund, Journal of the American   Chemical Society 132, 2345 (2010).


  The effect of the suppport on oxidative dehydrogenation activity   for vanadia/ceria systems is
  examined for the oxidation of methanol to formaldehyde by use of   well-defined VOx/CeO2(111) model catalysts.   Temperature-programmed desorption at low vanadia loadings   revealed reactivity at much lower temperature (370 K) as compared   to pure ceria and vanadia on inert supports such as silica.   Density functional theory is applied and the energies of   hydrogenation and oxygen vacancy formation also predict an   enhanced reactivity of the vanadia/ceria system. At the origin of   this support effect is the ability of ceria to stabilize reduced   states by accommodating electrons in localized f-states.

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