Investigation of the properties of CeO2-ZrO2-Al2O3 prepared by co-precipitation

CeO2-based oxygen materials were prepared with co-precipitation method and characterized via Brunauer-Emmet Teller(BET) method, X-ray diffraction(XRD) and temperature-programmed reduction(H-2-TPR). This paper revealed that three CeO2-based oxygen storage materials are all forming homogeneous solid solution. Among the samples, CeO2-ZrO2-Al2O3 (CZA) has the best textural properties and excellent thermal stability. The specific surface area and pore volume of aged CZA are 90 m(2)/g and 0.29 mL/g. We proposed a viewpoint: Al3+ might insert among the interspace of fluorite structure or highly dispersal in solid solutions.