Research Progress on Synergistic Removal of VOCs and NO_{<italic>x</italic>} Using CeO₂ Based Catalysts

Ammonia selective catalytic reduction (NH3-SCR) and catalytic oxidation are considered preferred technologies for removing nitrogen oxides (NOx) and volatile organic compounds (VOCs), respectively. Constructing efficient and stable catalysts is key to achieving synergistic catalytic technology. CeO2 has high oxygen storage capacity (OSC), tunable surface properties, large specific surface area, and abundant active sites, attracting significant attention in studies of synergistic catalytic removal of VOCs and NOx. This paper first briefly describes the mechanism of synergistic removal of NOx and VOCs, and systematically reviews the latest progress of CeO2-based catalysts in the synergistic removal of VOCs and NOx. The focus is on summarizing strategies such as morphology control, doping with transition metals/rare earth elements, and designing composite oxides, to synergistically optimize the catalyst's redox ability and surface acidity, thereby enhancing its catalytic performance. Finally, future research directions are prospected, pointing out that through precise structural regulation and advanced surface/interface engineering, it is expected to significantly improve the water and sulfur resistance of CeO2-based catalysts, providing theoretical basis and new ideas for material design for the development of industrial multi-pollutant synergistic control technology for complex flue gas.