Promoting effect of ceria on the physicochemical and catalytic properties of CeO 2 –ZnO composite oxide catalysts

Promoting effect of ceria on the physicochemical and catalytic properties of CeO 2 –ZnO... The activities of CeO 2 –ZnO composite catalysts prepared by amorphous citrate method are reported for cyclohexanol dehydrogenation and hydrogen transfer reactions in vapour phase. CeO 2 in ZnO promotes cyclohexanol conversion with >90% selectivity to cyclohexanone. The Ce 4+ Lewis acidic sites in CeO 2 –ZnO catalysts enhance the cyclohexanone selectivity. Hydrogen transfer reaction of cyclohexanone using 2-propanol as hydrogen donor produces cyclohexanol with selectivity >98%. The acid–base properties of CeO 2 –ZnO are the key factors for higher activities and selectivities which are influenced by the dispersion of CeO 2 phase. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Molecular Catalysis A: Chemical Elsevier

Promoting effect of ceria on the physicochemical and catalytic properties of CeO 2 –ZnO composite oxide catalysts

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Publisher
Elsevier
Copyright
Copyright © 2005 Elsevier B.V.
ISSN
1381-1169
eISSN
1873-314X
D.O.I.
10.1016/j.molcata.2005.07.048
Publisher site
See Article on Publisher Site

Abstract

The activities of CeO 2 –ZnO composite catalysts prepared by amorphous citrate method are reported for cyclohexanol dehydrogenation and hydrogen transfer reactions in vapour phase. CeO 2 in ZnO promotes cyclohexanol conversion with >90% selectivity to cyclohexanone. The Ce 4+ Lewis acidic sites in CeO 2 –ZnO catalysts enhance the cyclohexanone selectivity. Hydrogen transfer reaction of cyclohexanone using 2-propanol as hydrogen donor produces cyclohexanol with selectivity >98%. The acid–base properties of CeO 2 –ZnO are the key factors for higher activities and selectivities which are influenced by the dispersion of CeO 2 phase.

Journal

Journal of Molecular Catalysis A: ChemicalElsevier

Published: Jan 16, 2006

References

  • J. Catal.
    Martinez-Arias, A.; Fernandez-Gracia, M.; Galvez, O.; Coronado, J.M.; Anderson, J.A.; Conesa, J.C.; Soria, J.; Munuera, G.
  • J. Mol. Catal. A: Chem.
    Martin, D.; Duprez, D.
  • J. Catal.
    Choudhary, V.R.; Rane, V.H.

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