Role of ceria in oxidative dehydrogenation on supported vanadia catalysts

Journal of the American Chemical Society
M V Ganduglia-PirovanoHans-Joachim Freund

Abstract

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 VO(x)/CeO(2)(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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Citations

Oct 29, 2013·Journal of the American Chemical Society·Luca ArtigliaGaetano Granozzi
Jun 24, 2010·Physical Chemistry Chemical Physics : PCCP·José A Rodriguez, Dario Stacchiola
Jan 6, 2011·Physical Chemistry Chemical Physics : PCCP·Yan-Xia ZhaoXun-Lei Ding
May 15, 2013·Physical Chemistry Chemical Physics : PCCP·Zhenyan TangHuilin Wan
Oct 17, 2014·ACS Applied Materials & Interfaces·Luca ArtigliaGaetano Granozzi
Mar 29, 2014·Physical Chemistry Chemical Physics : PCCP·Benjamin HelmichJoachim Sauer
Dec 11, 2013·The Journal of Chemical Physics·Michael Nolan
Oct 7, 2015·Journal of the American Chemical Society·Xin-Ping Wu, Xue-Qing Gong
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Jul 10, 2014·The Journal of Chemical Physics·Delia Fernández-TorreRubén Pérez
Jul 6, 2016·Journal of the American Chemical Society·Hans-Joachim Freund
Mar 23, 2017·Physical Chemistry Chemical Physics : PCCP·Stig KoustStefan Wendt
Dec 10, 2016·Chemical Communications : Chem Comm·Yi-Fan JiangAn-Wu Xu
May 5, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Kang-Long WongWa-Hung Leung
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