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Effect of the ZrO2 phase on the structure and behavior of supported Cu catalysts for ethanol conversion
  • Universidade Federal de São Carlos (UFSCar)
  • Universidade Estadual Paulista (UNESP)
  • Bulgarian Academy of Sciences
  • 0021-9517
  • 1090-2694
The effect of amorphous (am-), monoclinic (m-), and tetragonal (t-) ZrO2 phase on the physicochemical and catalytic properties of supported Cu catalysts for ethanol conversion was studied. The electronic parameters of Cu/ZrO2 were determined by in situ XAS, and the surface properties of Cu/ZrO2 were defined by XPS and DRIFTS of CO-adsorbed. The results demonstrated that the kind of ZrO2 phase plays a key role in the determination of structure and catalytic properties of Cu/ZrO 2 catalysts predetermined by the interface at Cu/ZrO2. The electron transfer between support and Cu surface, caused by the oxygen vacancies at m-ZrO2 and am-ZrO2, is responsible for the active sites for acetaldehyde and ethyl acetate formation. The highest selectivity to ethyl acetate for Cu/m-ZrO2 catalyst up to 513 K was caused by the optimal ratio of Cu0/Cu+ species and the high density of basic sites (O2-) associated with the oxygen mobility from the bulk m-ZrO2. © 2013 Elsevier Inc. All rights reserved.
Issue Date: 
Journal of Catalysis, v. 307, p. 1-17.
Time Duration: 
  • Characterization
  • Cu/ZrO2 catalysts
  • Ethanol dehydrogenation
  • Ethyl acetate
  • Catalytic properties
  • Electron transfer
  • Electronic parameters
  • Ethanol conversion
  • Ethyl acetates
  • Oxygen mobility
  • Supported Cu
  • Catalyst selectivity
  • Ethanol
  • Zirconium alloys
  • Catalyst supports
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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