Preparation method and application of honeycomb porous crystal heterogeneous electrocatalyst

The invention relates to the technical field of electrocatalysis, in particular to a preparation method and application of a honeycomb porous crystal heterogeneous electrocatalyst, HMUiO-66-NH2 and COF-366-OH-Cu are prepared by adopting the preparation method, a catalyst MCH is obtained through the HMUiO-66-NH2 and the COF-366-OH-Cu, and CO2 is electrically reduced by applying the MCH. A simple solvothermal method is adopted, specially designed honeycomb MOFs with huge mesopores can serve as a porous template, interface internal interaction with COFs is promoted, and catalytic sites are greatly exposed; the COF based on Cu-TAPP forms a thin layer shape, so that the contact surface of a catalytic site Cu-N4 can be enlarged, active sites can be exposed to a great extent, and conversion of carbon dioxide is effectively promoted; according to the present invention, the structure-activity relationship can be easily understood, the honeycomb-shaped MOF (at) COF heterostructure is the candidate material for improvin