The catalytic activities of this series of mixed oxides for complete oxidation of CO and CH4 were examined and the relationships among activity, composition and structure were discussed.

But the CeO2-TiO2 mixed oxides prepared by conventional drying method show lower pore volume and surface area with serious aggregation, and amorphous phase compared to the corresponding aerogels.

The paper describes the preparation methods of hydrotalcite like compounds (HTLcs), the properties and catalytic application of pillared hydrotalcite and the mixed oxides formed by HTLcs calcination.