Tubular diffusion electrode for carbon dioxide electroreduction and preparation and application thereof

The invention relates to a tubular diffusion electrode for carbon dioxide electroreduction and preparation and application thereof.The tubular diffusion electrode is obtained by taking metal powder or metal oxide powder as a precursor through extrusion molding and thermocuring, a gas channel is formed in the tubular diffusion electrode, and a porous layered structure is formed on the wall face of the channel; the pore diameter and the number of pores in the porous layered structure can be controllably adjusted by changing the particle size and the thermocuring temperature of the precursor, so that diffusion of CO2 in the porous layered structure is changed. The tubular diffusion electrode is only made of metal, has electrical conductivity, catalytic property and gas diffusivity, is not easy to loosen and degrade when electrolyzing CO2 for a long time in a high-alkalinity environment, can stably operate, shows huge commercial application potential, and is simple in process, controllable in process, low in cost