Cooperative Effect of the Ce–Co‐Ox for the Catalytic Oxidation of Toluene

Abstract Pure CeO 2 , Co 3 O 4 and CeO 2 ‐CoO x catalysts were successfully prepared by co‐precipitation method and investigated for toluene oxidation. The introduction of cobalt improved the porous texture and increased the specific surface area of catalysts. The cooperative effect of Co and Ce was characterized by several techniques. The characterization results indicated that CeO 2 ‐CoO x showed the largest concentration of Ce 3+ , oxygen vacancy and surface adsorbed oxygen due to the generation of more structural defects, resulting in better redox properties. Hence, CeO 2 ‐CoO x exhibited excellent catalytic activity and ideal CO 2 selectivity than pure CeO 2 and Co 3 O 4 .