Double redox process to synthesize CuO-CeO catalysts with strong Cu-Ce interaction for efficient toluene oxidation.

In this study, a novel double redox (DR) method was developed to synthesize highly active CuO-CeO (CuCe-DR) catalyst for catalytic oxidative decomposition of toluene. Compare with CuCe-C catalyst prepared by co-precipitation method, CuCe-DR catalyst exhibits a higher Ce ion and incorporated Cu ion concentration, and has a stronger Cu-Ce interaction. Ce and incorporated Cu ions can induce the formation of oxygen vacancies, and thus increasing the amount of surface chemisorbed oxygen on CuCe-DR catalyst.