Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (01): 102-105.doi: 10.3866/PKU.WHXB20050121

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In-situ XRD and Raman Spectroscopic Study on the Solid State Reaction of CuO/Al2O3 Catalysts at High Temperature

FANG Ping;XIE Yun-Long;LUO Meng-Fei;HUANG Wei   

  1. Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004
  • Received:2004-06-24 Revised:2004-08-30 Published:2005-01-15
  • Contact: LUO Meng-Fei E-mail:mengfeiluo@mail.zjnu.net.cn

Abstract: A series of CuO/Al2O3 catalysts were prepared by impregnation method with different loadings, and calcined temperatures. The phase evolution of the surface region and the bulk on the CuO/Al2O3 catalysts was characterized by high-temperature in-situ XRD and Raman techniques. The experimental results show that CuAl2O4 phase formed as a result of a solid-solid interaction between CuO and Al2O3 when the calcination temperature reaches to 800 ℃,and the amount of CuAl2O4 increases at high temperature, which brings on the CuO in the surface region becomes more difficult to extend into the bulk, then the CuO can be stabilized on the surface region even after calcination at 900 ℃.

Key words: CuO/Al2O3, In-situ XRD, Raman spectra, Solid state reaction