<p>A series of Ce-modified V₂O₅-WO₃/TiO₂ catalysts were prepared by a multi-step impregnation method and applied to synergistically remove NO and dichloromethane at 125–325 °C. The physicochemical properties of the catalysts were analyzed. The performance of Ce-modified V-W/Ti catalysts for the synergistic removal of NO and dichloromethane under different reaction conditions (metal loading ratio, space velocity, initial concentration, SO₂, and HCl atmospheres) was determined by a series of characterization techniques. The results showed that the catalyst with 0.3 wt% vanadium and 8.0 wt% tungsten had excellent synergistic NO and dichloromethane removal performance. The synergistic removal performance of the catalysts was enhanced with increasing Ce loading, and the V-W/Ti type catalysts loaded with 10% Ce showed the best overall performance, with 89.6 and 92.1% removal of NO and dichloromethane, respectively, at 200 °C. The Ce-doped V-W/Ti catalysts had a larger specific surface area and better redox capacity, significantly improving the catalysts' resistance to sulfur and chlorine. The increase in the initial concentration of NO also significantly promoted the removal performance of dichloromethane. Gas chromatography–mass spectrometry analyzed the reaction products under the synergistic removal of NO and dichloromethane, revealing that the reaction intermediates of NO could promote the oxidative decomposition of dichloromethane synergistically with oxygen. This phenomenon reflects the catalyst's synergistic effect in treating these two pollutants.</p> Graphical abstract <p></p>