In situ decorated MOF-derived Mn–Fe oxides on Fe mesh as novel monolithic catalysts for NOx reduction†
It is still a challenge to develop metal-based monolithic deNOx catalysts with high activity, mass transfer ability and stability. Herein, we proposed a convenient and versatile pathway for the synthesis of novel monolithic deNOx catalysts originating from the in situ immobilization of metal organic framework (MOF) precursors on Fe mesh. Interestingly, the morphology and composition of the catalysts could be modulated by adjusting the synthesis parameters, such as the synthesis time, ligands and precursors, while the characterization results revealed an improvement in oxygen vacancies and Brønsted acid sites led by the strong interaction between the uniformly distributed active Mn–Fe components. As a result, the novel monolithic catalysts demonstrated improved catalytic performance compared with traditional catalysts obtained by hydroxide precursors. This work sheds lights on the advantages of using MOF-derived materials in situ decorated on metal mesh as monolithic catalysts and paves a way to design new monolithic deNOx catalysts with excellent low-temperature catalytic activity for future efforts.