Citation: LI Xiao-Kun, MA Dong-Dong, ZHENG Yan-Ping, ZHANG Hong, DING Ding, CHEN Ming-Shu, WAN Hui-Lin. Performance of CO Oxidation over Highly Dispersed ld Catalyst on TiOx/SiO2 Composite Supports[J]. Acta Physico-Chimica Sinica, ;2015, 31(9): 1753-1760. doi: 10.3866/PKU.WHXB201507091
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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.
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Keywords:
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ld
, - Nanoparticle,
- TiOx/SiO2 composite support,
- CO oxidation,
- Titania
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