Doped diamond-lead oxide coupling electrode and preparation method and application thereof

The invention discloses a doped diamond-lead oxide coupling electrode and a preparation method and application thereof.The doped diamond-lead oxide coupling electrode comprises a substrate and an electrode working layer arranged on the surface of the substrate, and the electrode working layer is of a three-layer film structure and comprises a doped diamond film layer, a middle tin-antimony coating and a lead oxide film layer from bottom to top; the middle tin-antimony coating is composed of a tin-antimony matrix and doped diamond particles A dispersed in the tin-antimony matrix, and the lead oxide film layer is composed of a lead oxide matrix and doped diamond particles B uniformly dispersed in the lead oxide matrix. The doped diamond-lead oxide coupling electrode combines the advantages of an oxide coating electrode and a doped diamond electrode, has a heterojunction effect, and has good conductivity, corrosion resistance and mechanical strength; the material can be used in the fields of electro-catalysis se