▎ 摘　　要

NOVELTY - Method for preparing iridium-based high-entropy alloy nano catalyst involves (a) dissolving iron acetylacetonate, cobalt acetylacetylacetate, nickel acetylacidate, copper acetonate and iridium acid in oil amine, ultrasonically mixing, (b) quickly heating to 200-250℃ under the atmosphere of nitrogen, and keeping for 2-5 hours to obtain black solution, centrifuging, washing and drying, and (c) mixing iron acetylacetate, the cobalt acetic acid, nickel accellulate, and the copper accellular acid with a molar ratio of 1:1:1:1: 1:1. USE - The method is useful for preparing iridium-based high-entropy alloy nano catalyst for oxygen evolution reaction, where the catalyst is used in electrolytic water technology as sustainable energy technology. ADVANTAGE - The iridium-based high-entropy alloy nano catalyst has excellent oxygen evolution catalytic activity and stability, and reduced overpotential of anode high reaction in the process of electrolyzing aquatic hydrogen, thus reducing the cost of the catalyst, improving the stability of catalyst, and reducing the electrolytic water energy loss. The method is simple and easy to realize in industry. The current density of 10 mA cm-2can be achieved by only 360 mV over potential in a 1 M potassium hydroxide solution, with a very small tafel slope (54 mV-1), and excellent long-term stability.