Citation: YE Qing, ZHAO Jian-Sheng, LI Dong-Hui, ZHAO Jun, CHENG Shui-Yuan, KANG Tian-Fang. Au/SnO₂ and M-Au (M=Pt, Pd)/SnO₂ Bimetallic Catalysts for the Low-Temperature Catalytic Oxidation of CO[J]. Acta Physico-Chimica Sinica, ;2011, 27(01): 169-176. doi: 10.3866/PKU.WHXB20110108 shu

Au/SnO₂ and M-Au (M=Pt, Pd)/SnO₂ Bimetallic Catalysts for the Low-Temperature Catalytic Oxidation of CO

1.
Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology,Beijing 100124, P. R. China

Received Date: 10 August 2010
Available Online: 23 November 2010
Fund Project: 国家自然科学基金项目(20777005) (20777005) 北京市自然科学基金项目(8082008) (8082008) 北京市组织部优秀人才基金项目(20071D0501500210) (20071D0501500210)北京工业大学人才强教深化计划项目(PHR201007105)资助 (PHR201007105)

Au/SnO₂ catalysts were prepared by deposition-precipitation (DP), co-precipitation (CP) and typical wet impregnation methods (IM). M(M=Pt, Pd)-promoted Au/SnO₂ catalysts were prepared by the DP method. The samples were characterized by X-ray diffraction (XRD), Brunaner-Emmett-Teller (BET) adsorption, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) techniques. The results showed that compared with CP and IM, the DP method led to a fairly uniform dispersion of ld nanoparticles with diameters less than 5 nm and larger specific surfaces for the Au/ SnO₂ catalyst. The Au in Au/SnO₂-DP was metallic (Au⁰) while in Au/SnO₂-CP and Au/SnO₂-IM the Au consisted of a mixture of Au⁰ and Au³⁺. The oxidation of carbon monoxide over the Au/SnO₂-DP and Mpromoted Au/SnO₂-DP catalysts were investigated. We observed that the Pd- or Pt-doping of Au/SnO₂-DP resulted in a significant increase in performance. We conclude that the different activities of the Au/SnO₂ catalysts that were prepared using different preparation methods may be attributed to the size of the Au particles and the states of ld. A remarkable improvement in catalytic activity because of Pd or Pt doping was associated with strong interactions between Pd or Pt and Au.
- Au/SnO₂,
- Low-temperature catalytic oxidation of CO,
- Preparation method,
- Au binary catalyst
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沈阳化工大学材料科学与工程学院沈阳 110142

Au/SnO2 and M-Au (M=Pt, Pd)/SnO2 Bimetallic Catalysts for the Low-Temperature Catalytic Oxidation of CO

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通讯作者: 陈斌, bchen63@163.com

Au/SnO₂ and M-Au (M=Pt, Pd)/SnO₂ Bimetallic Catalysts for the Low-Temperature Catalytic Oxidation of CO