Low-temperature SCR manganese-cobalt two-dimensional nanosheet denitration catalyst and preparation and application thereof

The invention relates to a low-temperature SCR manganese-cobalt two-dimensional nanosheet denitration catalyst and preparation and application thereof. The preparation method comprises the following steps of: dissolving PVP in deionized water to obtain a PVP aqueous solution; dissolving weighed cobalt salt and manganese salt in the PVP aqueous solution to obtain a mixed solution, vacuumizing the atmosphere where the mixed solution is located, and introducing helium for protection; under the condition of helium protection, dropwise adding sodium borohydride into the mixed solution, then exposing the solution in air, and stirring for reaction; and washing a solid obtained after the reaction with deionized water and absolute ethyl alcohol, and drying the solid to obtain a finished catalyst. Compared with the prior art, the two-dimensional nanosheet denitration catalyst provided by the invention has the advantages of large reaction temperature window, high low-temperature catalytic activity, water resistance, str