Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (10): 2032.

• Articles • Previous Articles     Next Articles

Interaction at Pt-CeO2 Contact Interface over Pt/CeO2/SBA-15 Catalyst

BI Ya-Dong, ZHANG Wei, XU Heng-Yong*, LI Wen-Zhao   

  1. Applied Catalysis Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
  • Received:2008-12-05 Online:2009-10-10 Published:2009-10-10
  • Contact: XU Heng-Yong. E-mail: xuhy@dicp.ac.cn
  • Supported by:

    国家“九七三”计划(批准号: 2005CB221401)资助.

Abstract:

A high dispersion of CeO2 within the pores of an SBA-15 mesoporous silica was achieved via deposition precipitation(DP) method, and Pt/CeO2/SBA-15 catalyst was prepared by further depositing Pt on CeO2-modified SBA-15. UV-Vis diffuse reflectance spectra show that intimate contact is formed at Pt-CeO2 interface, which is in favor of the transfer of electrons from CeO2 to Pt and formation of oxygen vacancies. The CO temperature-programmed reduction(CO-TPR) verified the enhanced reducibility of the surface oxygen on CeO2 over Pt/CeO2/SBA-15-DP catalyst.

Key words: CeO2; SBA-15 molecular sieve; Pt; UV-Vis diffuse reflectance spectrum; CO temperature-programmed reduction

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