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The effect of supports (Al2O3, Al2O3-CeO2 and Al2O3-CeZrO2) on the nature of gold-species in supported gold catalysts

  • A. V. Simakov
  • V. V. Kriventsov
  • I. L. Simakova
  • E. V. Smolentseva
  • F. Castillon
  • M. Estrada
  • E. Vargas
  • E. P. Yakimchuk
  • D. P. Ivanov
  • D. G. Aksenov
  • D. V. Andreev
  • B. N. Novgorodov
  • D. I. Kochubey
  • S. Fuentes
Article

Abstract

This work is concerned with the study of Au specimens produced by gold deposition on nanosized mixed oxides (alumina, ceria, zirconia) prepared by the sol-gel method using organometallic precursors. According to X-ray absorption near edge structure, extended X-ray absorption fine structure, transmission electron microscopy data, and ultraviolet-visible and X-ray photoelectron spectroscopy measurements, mixed Al-Ce-Zr oxides are quite effective for stabilization of different gold specimens. The samples pre- treated in hydrogen at 150°C are characterized by the presence of gold Au3+ cations located on the surface in slightly disordered octahedral oxygen coordination. Metallic gold nanoparticles with a size of about 2 nm and gold clusters were found in the samples treated in hydrogen at 300°C.

Keywords

Neutron Technique Cerium Oxide Gold Catalyst XANES Spectrum Metallic Gold 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • A. V. Simakov
    • 1
  • V. V. Kriventsov
    • 2
  • I. L. Simakova
    • 2
  • E. V. Smolentseva
    • 1
  • F. Castillon
    • 1
  • M. Estrada
    • 3
  • E. Vargas
    • 4
  • E. P. Yakimchuk
    • 2
  • D. P. Ivanov
    • 2
  • D. G. Aksenov
    • 2
  • D. V. Andreev
    • 2
  • B. N. Novgorodov
    • 2
  • D. I. Kochubey
    • 2
  • S. Fuentes
    • 1
  1. 1.Universidad Nacional Autonoma de MexicoCentro de Nanociencias y NanotecnologiaEnsenada, B.C.Mexico
  2. 2.Boreskov Institute of CatalysisRussian Academy of SciencesNovosibirskRussia
  3. 3.Posgrado en Fisica de MaterialesCICESEEnsenada, BCMexico
  4. 4.Posgrado en Ciencias e Ingeneria, Área NanotecnologiaUniversidad Autonoma de Baja CaliforniaEnsenada, B.C.Mexico

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