Self-supporting Ni-Fe-Mn oxygen evolution electrocatalyst and preparation method thereof

The invention provides a self-supporting Ni-Fe-Mn oxygen evolution electrocatalyst and a preparation method thereof, and belongs to the technical field of catalytic material preparation. The preparation method comprises the following steps: repeatedly smelting Ni, Fe and Mn metal raw materials, carrying out suction casting after smelting to obtain an as-cast plate, carrying out homogenization treatment on the as-cast plate, cutting, polishing, and finally etching in a nitric acid solution to obtain the self-supporting Ni-Fe-Mn oxygen evolution electrocatalyst. The self-supporting electrocatalyst prepared by adopting the methods of electric arc melting, heat treatment and chemical etching is simple in preparation process and easy to industrialize, and the self-supporting electrocatalyst is adjustable in size and excellent in stability and has excellent OER performance. 本发明提供了一种自支撑Ni-Fe-Mn析氧电催化剂及其制备方法，属于催化材料制备技术领域。本发明将Ni、Fe、Mn金属原料进行重复熔炼，熔炼结束后进行吸铸得到铸态板材，将铸态板材进行均质化处理后切割、抛光，最后在硝酸溶液中进行刻蚀即得自支撑Ni-Fe-Mn析氧电催化剂。本发明采用电弧熔