Method for preparing composite oxide having oxygen absorbing and desorbing capability

摘要

A method for preparing a composite oxide having oxygen absorbing and desorbing capability comprising the steps of: providing a starting composite oxide comprising cerium oxide, zirconium oxide, and hafnium oxide; subjecting said starting composite oxide to heating-deoxidation to give a deoxidized composite oxide; and subjecting said deoxidized composite oxide to heating-oxidation.