%0 Journal Article
%T Effect of ZrO2 on the Structure of NiO/CeO2/||/EM>-Al2O3 Composite Catalysts
%A YANG Xiu-Chun
%A LU Zhen-Guang
%A KANG Xiao-Chun
%A WEI Ya-Nan
%J 无机材料学报
%D 2009
%I Science Press
%R 10.3724/sp.j.1077.2009.00187
%X Using Ni(NO3)2 ¤6H2O, Al(NO3)3 ¤9H2O￡ ZrOCl2 ¤8H2O and Ce(NO3)3 ¤6H2O as raw materials, NiO/CeO2/Al2O3 and NiO/CeO2-ZrO2/A2O3 composite catalysts were prepared by co-precipitation method. Structures of the composite catalysts were investigated by X-ray diffraction (XRD), high resolution transmission electron microscope (TEM) and X-ray absorption near edge structure (XANES) spectroscope. Results indicate that NiO phase in NiO/CeO2/||/EM>-Al2O3 catalysts disappears above 600  ecause it interact with a ||/EM>-Al2O3 to form NiAl2O4 spinel. However, no NiAl2O4 spinel is found in NiO/CeO2-ZrO2/Al2O3 catalysts annealed at 700  ue to the formation of Zr0.30Ce0.45Al0.25O1.87aa solid solution.
%K co-precipitation
%K NiO
%K NiAl2O4 spinel
%K Zr0.30Ce0.45Al0.25O1.87aasolid solution
%U http://www.jim.org.cn/fileup/PDF/20090140.pdf