Porous transmission layer and preparation method and application thereof

The invention discloses a porous transmission layer and a preparation method and application thereof, and relates to the technical field of proton exchange membrane electrolytic cells. The preparation method of the porous transmission layer disclosed by the invention comprises the following steps: preparing an etching reagent; placing the porous sintered titanium plate into an etching reagent for etching to obtain a porous transmission layer; the etching reagent is an aqueous solution of HF and HNO3, the mass fraction of HF in the aqueous solution is 14.5%-17.9%, and the mass fraction of HNO3 in the aqueous solution is 2.4%-4.1%. The method is relatively simple, required equipment and reagents are few, the prepared porous transmission layer is relatively wide in aperture range, the mass transfer efficiency is favorably improved, meanwhile, the effective contact area of the porous transmission layer and the catalyst layer is not greatly influenced, and the electrochemical performance is good. 本发明公开了一种多孔传输层及其制备