Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (9): 1753-1760.doi: 10.3866/PKU.WHXB201507091

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Performance of CO Oxidation over Highly Dispersed Gold Catalyst on TiOx/SiO2 Composite Supports

Xiao-Kun. LI,Dong-Dong. MA,Yan-Ping. ZHENG,Hong. ZHANG,Ding. DING,Ming-Shu. CHEN*(),Hui-Lin. WAN   

  • Received:2015-04-16 Published:2015-09-06
  • Contact: Ming-Shu. CHEN
  • Supported by:
    the National Key Basic Research Program of China (973)(2010CB732303, 2013CB933102);Major Project of ChineseMinistry of Education(309019);National Natural Science Foundation of China(20923004, 21033006, 21073149, 21273178);Program forInnovative Research Team in University, China(IRT1036)


Supports have a significant effect on the dispersion and stability of Au nanoparticles because of the support-metal interaction. In the present work, TiOx/SiO2 composite supports were prepared by the surface sol-gel (SSG) method to enhance the binding strength between the metal and the support. The samples were characterized by low-energy ion scattering (LEIS) spectroscopy, X-ray photoelectron spectroscopy (XPS), Xray diffraction (XRD), transmission electron microscopy (TEM), and N2 physisorption (BET). The results showed that the TiOx species in TiOx/SiO2 were highly dispersed on SiO2 with the formation of Ti―O―Si linkages. The catalytic activity and stability for CO oxidation on Au/TiOx/SiO2 were significantly enhanced, because of the better dispersion of Au nanoparticles compared with Au/TiO2.

Key words: Gold, Nanoparticle, TiOx/SiO2 composite support, CO oxidation, Titania