Catalysis Letters

, Volume 116, Issue 3–4, pp 128–135

Rational design of gold catalysts with enhanced thermal stability: post modification of Au/TiO2 by amorphous SiO2 decoration

  • Haoguo Zhu
  • Zhen Ma
  • Steven H. Overbury
  • Sheng Dai
Article

Abstract

Au/TiO2 is highly active for CO oxidation, but it often suffers from sintering in high-temperature environments. In this work, we report on a novel design of gold catalysts, in which pre-formed Au/TiO2 catalysts were post decorated by amorphous SiO2 to suppress the agglomeration of gold particles. Even after being aged in O2–He at 700 °C, the SiO2-decorated Au/TiO2 was still active for CO oxidation at ambient temperature.

Keywords

gold nanoparticles CO oxidation promotion sintering alkoxysilanes post decoration 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Haoguo Zhu
    • 1
  • Zhen Ma
    • 1
  • Steven H. Overbury
    • 1
  • Sheng Dai
    • 1
  1. 1.Chemical Sciences Division and Center for Nanophase Materials SciencesOak Ridge National LaboratoryOak RidgeUSA

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