Preparation method of FeS2-Cu39S28 oxygen evolution electrocatalyst

The invention discloses a preparation method of a FeS2-Cu39S28 oxygen evolution electrocatalyst, and belongs to the technical field of electrocatalytic oxygen evolution. The preparation method of the FeS2-Cu39S28 oxygen evolution electrocatalyst comprises the following steps: adding a copper substrate into a ferric salt solution, then adding an oxalic acid solution, and carrying out a low-temperature hydrothermal reaction to obtain a Fe-Cu-based precursor; and putting the Fe-Cu-based precursor into a sodium sulfide solution, and carrying out normal-temperature vulcanization treatment, so as to obtain the FeS2-Cu39S28 oxygen evolution electrocatalyst. The FeS2-Cu39S28 oxygen evolution electrocatalyst prepared by the preparation method disclosed by the invention has excellent electrocatalytic oxygen evolution performance under an alkaline condition and is long in service life. In a total water decomposition performance test of the two electrodes, excellent total water decomposition performance and good stabilit