New insight into the microstructure–thermal stability relationships in ceria-zirconia solid solution and the application in Pd-only three-way catalyst

Three ceria-zirconia solid solutions were prepared by different synthesis routes. The results showed that CZ3 exhibited incompact structure with heterogeneous particle size distribution, accompanied by a bimodal pore size distribution. After aging treatment, the specific surface area and cumulative pore volume of CZ3-a were 37 m2/g and 0.22 cm3/g, which decreased by only 51% and 4% respectively from the fresh state. And the particle volume increased by only 4 times. Among the three samples, the textural/structural properties of CZ3 showed the smallest degradation, indicating the highest thermal stability, which was attributed to the incompact structure and special texture.

Duke Scholars

Author Li Lan Molecular Genetics and Microbiology