以Ni(NO3)2·6H2O、Al(NO3)3·9H2O、ZrOCl2·8H2O和Ce(NO3)3·6H2O为原料，采用共沉淀法分别制备了NiO/CeO2/γ-Al2O3和NiO/CeO2-ZrO2/Al2O3催化剂.通过X射线衍射（XRD）、透射电子显微镜（TEM）和近边X射线吸收精细结构（XANES）等方法对催化剂的组成结构进行表征.结果表明，煅烧温度高于600℃时，NiO/CeO2/γ-Al2O3催化剂中的NiO与γ-Al2O3载体发生作用，形成NiAl2O4尖晶石；而NiO/CeO2-ZrO2/Al2O3催化剂中，NiO能够稳定存在，没有NiAl2O4尖晶石生成，且Al2O3与CeO2和ZrO2作用形成一种新的Zr0.30Ce0.45Al0.25O1.87固溶体.
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/γ-Al2O3 catalysts disappears above 600℃ because it interact with γ-Al2O3 to form NiAl2O4 spinel. However, no NiAl2O4 spinel is found in NiO/CeO2-ZrO2/Al2O3 catalysts annealed at 700℃ due to the formation of Zr0.30Ce0.45Al0.25O1.87 solid solution.
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