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

Herein, we report the self-sacrificial template strategy to design mesoporous layered CeVWOx/TiO2 catalysts for the selective catalytic reduction of NO by NH3 (NH3-SCR). As-fabricated CeVWOx/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 CeVWOx/TiO2 catalysts exhibit excellent SCR activity with the NOx conversion of over 90% between 210 and 470 °C. Meanwhile, CeVWOx/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 CeVWOx/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 CeVWOx/TiO2 at low temperature. This work offers a facile strategy to design and fabricate efficient 2D deNOx catalyst.