Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (12): 1097-1100.doi: 10.3866/PKU.WHXB19951208

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Study on Phase Structure, Pore Structure and catalytic Property of Out-layer ZrO2 on Alumina Base

 ZHOU Ren-Xian, WEI Jian-Gen, ZHENG Xiao-Ming, WU Hong-Li, LV Guang-Lie   

  1. Institute of Catalysis, Hangzhou University; Centrul Laboratory of Hangzhou Universtiy Hangzhou 310028
  • Received:1995-01-25 Revised:1995-04-24 Published:1995-12-15
  • Contact: Zhou Ren-Xian

Abstract:

XRD was used to Characterize the system of alumina supported ZrO2 in a temperature range of 500-1000℃. It was found that ZrO2 in ZrO2-Al2O3 sample was non-crystalline below 600℃, cubic-ZrO2 over a temperature range of 600-900℃,and t-ZrO2at temperature higher than 900℃. The pore structure, CO oxidation activity and suface oxygen properties of out-layer ZrO2 were also studied. The results indicated that small out-layer ZrO2 made a contribution to pore structure of alumina base in a pore size range of 10-50Å, and not only was CO oxidation activity of ZrO2-Al2O3 samples related to its phase structure, but also to properties of its surface oxygen desorption and lattice oxygen defect.

Key words: ZrO2-Al2O3 catalysts, CO oxidation, Surface oxygen