Carbon-doped composite metal oxide oxygen evolution anode for electrolyzing carbon dioxide and preparation method of carbon-doped composite metal oxide oxygen evolution anode

The invention belongs to the technical field of carbon dioxide electrolysis oxygen evolution anode preparation, and particularly relates to a porous-structure carbon-doped composite metal oxide oxygen evolution anode for carbon dioxide electrolysis and a preparation method thereof.The preparation method comprises the following steps that S1, a titanium substrate is pretreated, specifically, the titanium substrate is taken and subjected to alkali washing, sand blasting, acid pickling, water washing and drying in sequence for use; s2, preparation of a precursor solution: dissolving an iridium platinum ruthenium source, a transition metal source and a carbon source in a solvent to obtain the precursor solution; s3, coating and heat treatment of a precursor solution: i) taking a part of the precursor solution, uniformly coating the surface of the pretreated titanium substrate with the precursor solution, and then sequentially performing drying, aerobic low-temperature sintering and cooling; ii) repeating the step