NOx removal by selective catalytic reduction with NH3 over MOFs-derived MnTi catalyst

In this work, MnTi-MOFs precursors were successfully synthesized via solvothermal method, from which MnTi-I catalyst was subsequently derived and evaluated in NH3-SCR. A series of characterization confirmed the successful preparation of MnTi-MOFs precursors in one step by controlling the ratio of metal element to organic ligand as well as the molar ratio of Mn to Ti. Benefiting by its moderate surface chemisorption oxygen, higher Mn4+/Mn3+ ratio and more acid sites on the catalyst surface, MnTi-I catalyst behaved better in NH3-SCR with 97% NOx conversion at 150 degrees C, 80.1% N2 selectivity at 360 degrees C and strong H2O/SO2 resistance. This work provides a new protocol for the one-step synthesis of bimetallic MOFs and a theoretical basis for fabricating an efficient MnTi-based catalyst in the NH3-SCR field.