Journal of Materials Science

, Volume 42, Issue 15, pp 6188–6196 | Cite as

Physico-chemical study of impregnated Cu and V species on CeO2 support by thermal analysis, XRD, EPR, 51V-MAS-NMR and XPS

  • Renaud CousinEmail author
  • Edmond Abi-Aad
  • Sylvie Capelle
  • Dominique Courcot
  • Jean-François Lamonier
  • Antoine Aboukaïs


CuVCe oxides were prepared by impregnation of copper and/or vanadium precursors on ceria support. The solids freshly prepared were calcined under air between 400 and 700 °C. Physico-chemical properties of these oxides were then studied using different techniques: Thermal Analysis (DSC/TG), X Ray Diffraction (XRD), Electron Paramagnetic Resonance (EPR), 51V Magic Angle Spinning Nuclear Magnetic Resonance (51V-MAS-NMR) and X-Ray Photoelectron Spectroscopy (XPS). X-ray diffraction and thermal analysis revealed cerium orthovanadate phase formation during the calcination of the 1Cu1V10Ce solid. This CeVO4 phase is not observed for the 10Cu1V10Ce sample. The EPR study revealed two well-resolved copper signals: the first corresponds to isolated Cu2+ species and the second to Cu2+ dimers. The 51V-MAS-NMR confirmed the presence of CeVO4 phase for 1Cu1V10Ce sample and revealed polymeric V–O–V chains in interaction with a copper ceria matrix for 10Cu1V10Ce sample. Finally, the XPS study indicated high vanadium content on the solid surface. This phenomenon is enhanced by the copper content in the solid and could explain the absence of the CeVO4 phase in 10Cu1V10Ce sample. Thus the ceria orthovanadate phase formation is inhibited by the presence of a high copper content in the solid.


Vanadium Electron Paramagnetic Resonance Ceria CeO2 Electron Paramagnetic Resonance Spectrum 



The authors would like to thank L. Gengembre for assistance with the XPS analysis and B. Revel for the NMR measurements. The “Conseil Général du Nord”, the “Région Nord-Pas de Calais”, and the European Community (European Regional Development Fund) are gratefully acknowledged for financial supports in the purchase of the EPR and thermal analysis apparatus.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Renaud Cousin
    • 1
    Email author
  • Edmond Abi-Aad
    • 1
  • Sylvie Capelle
    • 1
  • Dominique Courcot
    • 1
  • Jean-François Lamonier
    • 1
  • Antoine Aboukaïs
    • 1
  1. 1.Laboratoire de Catalyse et Environnement, E.A. 2598Université du Littoral Côte d’OpaleDunkerqueFrance

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