Method for preparing carbon monoxide through carbon dioxide electrochemical reduction

The invention relates to a method for preparing carbon monoxide by electrochemical reduction of carbon dioxide. The method comprises the following steps of: separating a cathode chamber and an anode chamber by a proton exchange membrane by adopting an H-shaped double-electrochemical-cell reactor; introducing carbon dioxide gas into the cathode chamber before reaction; and using a three-electrode system, wherein a gas diffusion electrode is used as a working electrode, a platinum electrode is used as an auxiliary electrode, a silver/silver chloride electrode is used as a reference electrode, the gas diffusion electrode comprises a gas diffusion electrode body and a carbon dioxide electrochemical reduction catalyst loaded on the gas diffusion electrode body, and the carbon dioxide electrochemical reduction catalyst is gold-based bimetal supported by multi-walled carbon nanotubes. The method can improve the Faraday efficiency of the product carbon monoxide. 本发明涉及一种二氧化碳电化学还原制备一氧化碳的方法，包括：采用H型双电化学池反应器，以质子交换膜隔离为阴极室和