In situ synthesis of low-valence MnO/Mn3O4 catalyst via carbon-acid hydrothermal strategy for NO removal

A rational design of high dispersion MnO/MnO catalysts based on carbon-acid hydrothermal strategy was proposed for selective catalytic reduction of NO at low temperature. The reaction mechanisms of low valence manganese coordination and catalytic path were revealed through active site analysis and in-situ DRIFTS characterization. The results showed that reasonable low valence manganese nanofibers cooperated to derive hierarchical mesoporous structure and abundant surface active oxygen. The chemisorbed oxygen specie cooperated with Lewis acid sites accelerated the production of NO in the catalytic process and realized high-efficiency NO removal at ultra-low temperature. Such a facile preparation method of low valence manganese nanofibers structure widens the way for NH-SCR of NO in industrial practice.