Precious metal-based film/carbon composite catalytic electrode and preparation method thereof

The invention discloses a precious metal-based film/carbon composite catalytic electrode and a preparation method thereof.The macrostructure main body of the composite catalytic electrode is a carbon rod, a catalytic active substance Pt/3R-IrO2 is deposited on the surface of the carbon rod in the form of a composite film, and the carbon rod, a 3R-phase IrO2 film layer and Pt nano-particles are stably combined together; the preparation process of the electrode material mainly comprises the following three processes: 1, depositing an IrO2 precursor film; step 2, a forming process of a 3R-phase IrO2 body thin film; and step 3, in the deposition process of Pt nanoparticles, benefited from the high intrinsic oxygen evolution catalytic activity of 3R-phase IrO2, the high intrinsic hydrogen evolution catalytic activity of Pt and the structural integrated electrode form, the composite catalytic electrode shows excellent hydrogen evolution/oxygen evolution dual catalytic activity and good working stability, and can be