耐高温高比表面积铈锆铝储氧材料的制备

eO2-ZrO2-Al2O3 (CZA) was prepared by co-precipitation method and was characterization by XRD, TPR, BET, OSC, NH3-TPD and SEM. The results of BET and OSC indicated that CZA was typical oxygen storage material with high temperature resistance and large specific surface area. The results of SEM showed that particles in CZA powder were spherical with diameter around 5-10μm with no significant change before and after aging. The results of NH3-TPD measurement showed that acid sites of a certain strength existed on the surface and stably existed at high temperature. The results of XRD and TPR showed that CZA kept the solid solution after aging and the stability of synergy existed between the three components in the materials. It could be found that CeO2 ensured the properties of the storage and release of oxygen for CZA via Ce4+/Ce3+ the cycle of redox reaction; the existence of ZrO2 promoted the generation of Ce3+ ion, ensured the irreversible redox reaction went on smoothly and improved the oxygen mobility; Al2O3 contribute much to textural properties, CZA showed the large specific surface area of after calcinations at high temperature and excellent the oxygen storage capacity at low temperature.