CORE-SHELL OXIDE MATERIAL, METHOD FOR PRODUCING THE SAME, AND CATALYST AND METHOD FOR PURIFICATION OF EXHAUST GAS USING THE CORE-SHELL OXIDE MATERIAL

摘要

A core-shell oxide material comprises: a core which comprises a ceria-zirconia based solid solution powder having at least one ordered phase of a pyrochlore phase and a κ phase; and a shell which comprises an alumina based oxide disposed on at least a portion of a surface of the core.