Research Progress of CeO₂‐Containing Catalysts in Catalytic Oxidation of CO

At present, the problem of air pollution facing the earth is becoming more and more severe, and it has become an urgent task for researchers to find effective solutions. As an important catalyst carrier and active component, CeO 2 has received extensive attention in the field of CO‐catalyzed oxidation. This article reviews the strategies of doping metal active components, regulating the loaded active sites and controlling the preferential exposure of crystal planes as approaches to enhance the low‐temperature oxidation activity of CO. When the active metal is incorporated into the CeO 2 lattice, the active metal significantly reduces the oxygen vacancy formation energy (Evf) on the catalyst surface, resulting in the high catalytic activity of the catalyst at low temperatures. When the active metal is loaded on the CeO 2 surface, many active sites can be obtained by increasing the dispersion, and the catalytic activity can be significantly improved by introducing new interface sites between the metal and the CeO 2 support. By precisely controlling the arrangement of surface atoms, the reactivity of Ce 4+ /Ce 3+ ions can be effectively regulated, thereby altering the oxygen release and absorption properties of CeO 2 . This review is helpful for the application of CeO 2 ‐containing catalysts in the field of low‐temperature catalytic oxidation of CO.