Foamed nickel self-supported cobalt-manganese-molybdenum trimetal sulfide heterostructure electrocatalyst as well as preparation method and application thereof

The invention belongs to the technical field of electro-catalysis, and relates to a foamed nickel self-supported cobalt-manganese-molybdenum trimetal sulfide heterostructure electro-catalyst as well as a preparation method and application of the foamed nickel self-supported cobalt-manganese-molybdenum trimetal sulfide heterostructure electro-catalyst. A cobalt salt, a manganese salt, urea and ammonium fluoride are subjected to in-situ growth of a cobalt-manganese hydroxide precursor on the surface of foamed nickel through a hydrothermal synthesis method, and then the cobalt-manganese hydroxide precursor is pyrolyzed into cobalt-manganese oxide through annealing under the inert atmosphere condition; and synthesizing by a hydrothermal method. According to the prepared electrocatalyst, the foamed nickel with rich holes serves as a catalyst carrier, electron transfer is promoted, the nanosheets of the heterostructure have a synergistic effect, and the electrocatalytic performance of the electrocatalyst is further