Enhanced oxygen storage capacity of cation-ordered cerium–zirconium oxide induced by titanium substitution

Abstract

Herein, we report on the synthesis of Ce_0.5Zr_0.5−xTi_xO₂ oxygen storage materials prepared via a solution combustion method. Ce_0.5Zr_0.4Ti_0.1O₂ showed an outstanding oxygen storage capacity (1310 μmol-O per g) at 200 °C compared to conventional κ-Ce₂Zr₂O₈ (650 μmol-O per g) due to its cation ordering and the formation of weakly bound oxygen atoms induced by Ti substitution.