Preparation method and application of carbon-based asymmetric wettability composite cathode for producing hydrogen peroxide through electro-catalysis

The invention discloses a preparation method and application of a green and recyclable asymmetric wettability composite cathode of a high-activity and low-cost catalyst loaded three-dimensional porous high-oxygen transmission carbon-based substrate. A carbon-based substrate is coated with one of cheap commercial catalysts (such as carbon black, activated carbon, acetylene black and graphite powder) through a binder to prepare the asymmetric wettability composite electrode, the asymmetric wettability composite electrode can be applied to an electrochemical reactor, alkaline hydrogen peroxide is produced through electrocatalytic oxygen reduction, and the asymmetric wettability composite electrode belongs to the field of application of electrocatalytic materials. The invention aims to solve the problems of tedious and complicated preparation process, high cost and low mass transfer efficiency of most cathodes for producing hydrogen peroxide through electrocatalysis at present, and has the beneficial effects that