Bipolar multilayer electrode design for stable electrochemical reduction of co2 to hydrocarbons

Abstract

The present invention pertains to a multilayer electrode for CO2 electrolysis, in particular a bipolar multilayer electrode for stable electrochemical reduction of CO2 to hydrocarbons as well as a corresponding electrochemical cell. Accordingly, a multilayer electrode (10) for CO2 electrolysis is suggested, comprising a gas diffusion layer (12) with a predefined pore size adapted for CO2 diffusion, a catalyst layer (14) adjacent to the gas diffusion layer (12) and comprising a copper-based cathode catalyst, and a conductive layer (16) adjacent to the catalyst layer (14), wherein the gas diffusion layer (12), the catalyst layer (14), and the conductive layer (16) together form a gas diffusion electrode, and wherein the catalyst layer (14) comprises a predefined amount of anion exchange ionomer (18) and the conductive layer (16) comprises at least one layer comprising a predefined amount of cation exchange ionomer (24). According to the invention, the conductive layer (16) comprises a graphite layer (20) comprising a predefined portion of the cation exchange ionomer (24).

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