Application of mononuclear nickel complex as catalyst in electro-catalysis hydrogen production and photocatalysis organic dye degradation

The invention relates to the fields of hydrogen energy source development and environmental protection, and specifically relates to a mononuclear nickel complex containing N-substituted diphosphonic hydrogen and 1,2-dithiol salt ligand with an electro-catalysis hydrogen production and photocatalysis organic dye degradation performance. The complex is a mononuclear nickel complex formed by connecting R-PNP and 1,2-diphenyl thiophenol (bdt) (or 4-methyl-1,2-diphenyl thiophenol (bdtMe)) ligand with metallic nickel atoms, and the chemical structure of the complex is shown in the specification. Thenickel complex has efficient electro-catalysis hydrogen production activity in an acidic medium, and has efficient photocatalysis degradation function for organic dyes. The mononuclear nickel complexdisclosed by the invention is simple in synthetic method, mild in reaction condition and high in yield, is applicable for the synthesis of the mononuclear nickel complex containing N-substituted diphosphonic hydrogen and 1,2-