| abstract |
The invention relates to a cerium-zirconium composite oxide, in particular to a high-temperature-resistant cerium-zirconium composite oxide and a preparation method and application thereof. A cerium-zirconium composite oxide containing a cerium oxide, a zirconium oxide, and an oxide of at least one rare earth metal element selected from the group consisting of cerium and other elements; after the cerium-zirconium composite oxide is aged and heat-treated at 1100 ℃ for 5 hours, the content of the doped rare earth elements on the surface of the cerium-zirconium composite oxide is reduced, unchanged or increased compared with the content of the doped rare earth elements in a fresh state, and the increase amplitude is not more than 5%. The cerium-zirconium composite oxide provided by the invention has excellent high-temperature stability and good catalytic performance. |