Novel mesoporous CeVWO_x/TiO₂ nanosheets for selective catalytic reduction of NO by NH₃

Herein, we report the self-sacrificial template strategy to design mesoporous layered CeVWO_x/TiO₂ catalysts for the selective catalytic reduction of NO by NH₃ (NH₃-SCR). As-fabricated CeVWO_x/TiO₂ catalysts with unique mesoporous and layered structure were successfully prepared through the synthesis of Ce,Ti-MOFs by solvothermal method, the impregnation of vanadium and tungsten in Ce,Ti-MOFs and high temperature calcination process. As NH₃-SCR catalysts, well-designed CeVWO_x/TiO₂ catalysts exhibit excellent SCR activity with the NO_x conversion of over 90% between 210 and 470 °C. Meanwhile, CeVWO_x/TiO₂ shows superior tolerance to water vapor and SO₂. The features of unique mesoporous layered nanostructure, surface acidity, tunable reducibility, active and the strong interaction of active metal oxide and support in CeVWO_x/TiO₂ nanosheets should contribute to the improved SCR performance. In situ diffuse reflection infrared Fourier transform spectroscopy (DRIFTS) analysis indicates that both Langmuir–Hinshelwood (L-H) and Eley-Rideal (E-R) mechanisms are present on the surface of CeVWO_x/TiO₂ at low temperature. This work offers a facile strategy to design and fabricate efficient 2D deNO_x catalyst.