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中文摘要：
自上世纪80年代初期以来，稀土铈氧化物（CeO2）作为一种储氧材料已在汽车三效催化剂（TWC）中得到了广泛应用。众所周知，CeO2在富氧和富燃条件下有储氧和释放氧的功能，CeO2在缺氧条件下可通过Ce^4＋’转化成Ce^3＋而释放出氧气，在富氧条件下Ce^3＋又可氧化成Ce^4＋而吸收氧，即2CeO2（Ce2O3＋1／2O2。
英文摘要：
In the present paper, Ce-Zr-Y-La-Mn oxygen storage material was synthesized by co-precipitation method and characterized by X ray diffraction （XRD）, BET, TG and temperature programmed reduction （TPR）. The effects of textural and structural properties, low temperature redox behavior, and change in phase were investigated at various calcination temperatures. The XRD results show that the samples belong to the same crystalline shift at various calcinations temperature and the fluorite structure of the precipitation keeps unchanged. The new phase is not separated from the solid solution after calcined at 1000℃. The BET results show that the surface area of the sample reaches 45m^2/g after aging 5h at 1000℃. The TPR results show that the sample indicates best reducibility calcined at 600℃.
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