Self-supporting transition metal hydroxide or oxide composite material, preparation method and application of composite material in electro-catalytic oxygen evolution

The invention discloses a self-supporting transition metal hydroxide or oxide composite material, a preparation method and application of the self-supporting transition metal hydroxide or oxide composite material in electro-catalytic oxygen evolution. The preparation method comprises the following steps: preparing CuCo2O4/NF from copper nitrate trihydrate, cobalt nitrate hexahydrate and urea by using a hydrothermal calcination method; electrolyte with ferric nitrate nonahydrate and nickel nitrate hexahydrate as electrolytes is adopted for conducting three-electrode system electro-deposition operation, and the self-supporting transition metal hydroxide or oxide composite material is prepared. The self-supporting transition metal hydroxide/oxide composite material is synthesized by adopting relatively cheap transition metal as a raw material, the composite material has excellent electro-catalytic oxygen evolution performance and relatively good innovativeness, the used raw materials are relatively cheap and eas