▎ 摘　　要

NOVELTY - A preparation method of self-supporting non-noble metal nano-film electrocatalyst, involves (1) weighing non-noble metal salt, phosphorus source, complexing agent, and brightening agent according to the proportion, dissolving in deionized water, and ultrasonically stirring to obtain electrolyte, and adding 0.01-0.50 mol non-noble metal salt, 0.01-5 mol phosphorus source, 0.01-2.5 mol complexing agent and 0.001-1 mol brightening agent to each 1 L deionized water in electroplating liquid, (2) taking a conductive substrate as a working electrode, electrodepositing the electrolyte in the step (1) to obtain an initial product of self-supporting non-noble metal nano-film electrocatalyst, and (3) cleaning and drying the initial product obtained in the step (2), calcining and annealing in an atmosphere environment to obtain a self-supporting non-noble metal nano-film electrocatalyst. USE - Preparation method of self-supporting non-noble metal nano-film electrocatalyst for use in electrolytic cell and electrolysis of water (claimed). ADVANTAGE - The method enables preparation of self-supporting non-noble metal nano-film electrocatalyst with high efficiency, prolonged service life, and excellent electrocatalytic hydrogen evolution performance, by simple, economical and environmentally-friendly process. DETAILED DESCRIPTION - A preparation method of self-supporting non-noble metal nano-film electrocatalyst, involves (1) weighing non-noble metal salt, phosphorus source, complexing agent, and brightening agent according to the proportion, dissolving in deionized water, and ultrasonically stirring to obtain electrolyte, and adding 0.01-0.50 mol non-noble metal salt, 0.01-5 mol phosphorus source, 0.01-2.5 mol complexing agent and 0.001-1 mol brightening agent to each 1 L deionized water in electroplating liquid, where the non-noble metal salt is one or more of manganese, iron, cobalt, nickel, copper, molybdenum, tungsten sulfate, nitrate, acetate, and chloride, the phosphorus source is one or more of sodium hypophosphite, potassium hypophosphite, and ammonium hypophosphite, and the complexing agent is one or more of sodium dodecylbenzenesulfonate, sodium pyrophosphate, sodium aminosulfonate, sodium acetate, sodium citrate, ethylenediamine, sodium ethylene diamine tetracetate, and sodium tartrate, (2) taking a conductive substrate as a working electrode, electrodepositing the electrolyte in the step (1) to obtain an initial product of self-supporting non-noble metal nano-film electrocatalyst, and (3) cleaning and drying the initial product obtained in the step (2), calcining and annealing in an atmosphere environment to obtain a self-supporting non-noble metal nano-film electrocatalyst. An INDEPENDENT CLAIM is included for use of self-supporting non-noble metal nano-film electrocatalyst.