Preparation method of catalytic electrode for electrolytic synthesis of hydroboron

The invention provides a preparation method of a catalytic electrode for electrolytic synthesis of hydroboron. The preparation method comprises the following steps of: carrying out titanium oxide micro-nanometer wire hydrothermal growth on a titanium substrate; carrying out ammonia nitrogen reduction of a titanium oxide micro-nanometer wire on the titanium substrate; chemically depositing a composite metal Ni-Pb sub-layer; and chemically replacing and depositing an Au surface layer. The prepared catalytic electrode is high in rigidness, resistant to corrosion, stable in performances, porous insurface and quite high in conductivity; by mutual collaborative action of a plurality of metals, the catalytic electrode has good catalytic activity. According to measurement, after a finished electrode product is used as a cathode catalytic electrode, the average current efficiency is as high as 35%, and a NaBH4 product can be obtained by reduction. The preparation method provided by the invention is simple in steps and