N-doped porous carbon material derived by MOFs calcined in proper oxygen atmosphere as high-performance catalyst for the low-temperature NH3-SCR

Nowadays, with the development of industrial applicability and low energy consumption, a catalyst for implementing the NH3-SCR reaction at low temperature is urgently needed. MOFs derivatives (MD) prepared by calcined of MOFs could reserve many characteristics of MOFs show great potential. And in order to prepare high NO conversion catalysts, the pyrolysis conditions of MOFs draw more attentions in the preparation process. Therefore, in this work, after calcined MOFs precursor at the atmosphere of different oxygen concentration (pure oxygen, air, nitrogen), a series of nanocomposite are obtained. The experimental results reveal that catalyst calcined in the atmosphere of proper oxygen concentration (air) has the best deNOx performance and better resistance of water and sulfur dioxide. Further explorations exhibit that it could be primarily ascribed to the distinctive porous structure which is made up of well-dispersed MnOx-CeOx together with N-doped carbon skeleton. The conductivity can be efficiently increased to hasten the transfer of electrons. In addition, in situ DRIFTS results indicate that the interaction on the surface of catalyst calcined in air is stronger and the mechanism of prepared catalysts is Eley-Rideal (E-R) at low temperature and Langmuir-Hinshelwood (L-H) at high temperature.