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30 reviewsThere is an increasing demand to develop efficient SCR deNOx catalysts with high resistance to alkali andheavy metals. In this study, a V2O5–WO3/TiO2 (denoted VWTi) catalyst modified with FeOx and CeOx in0.05Fe/V and 1.5Ce/V molar ratio (denoted FeCeVWTi) showed enhanced SCR activity and resistance to K–Pb co-poisoning in the temperature range of 300–400 °C. The FeCeVWTi catalyst also presentedoutstanding tolerance to H2O and SO2. After K–Pb poisoning, the FeCeVWTi catalyst showed 92.7% NOxconversion at 350 °C, much higher than that of the VWTi catalyst (70.6%). The Fe and Ce co-dopingsignificantly improved the redox ability, V5+ ratio and surface chemisorbed oxygen ratio of the VWTicatalyst by the interaction between Fe, Ce and V. The cooperation between Fe and Ce slightly decreasedReceived 3rd May 2022,the surface acidity but significantly enhanced the NOx adsorption on the FeCeVWTi catalyst. Additionally, inAccepted 20th May 2022situ DRIFTS revealed that the SCR reaction on VWTi followed an E–R mechanism, while Fe and Ce coDOI: 10.1039/d2cy00818adoping changed the reaction route and made the SCR reaction on FeCeVWTi follow both an E–Rmechanism and an L–H mechanism. The enhanced redox ability and adsorption of NOx played decisiversc.li/catalysisroles in improving the alkali–heavy metal resistance of the FeCeVWTi catalyst.