Significant progress on electrocatalytic CO₂ reduction reaction (CO₂RR) has been achieved in recent years. However, the research and development of electrolyzer device for CO₂RR is scarce. Here we use anion exchange membrane to develop zero-gap electrolyzers for CO₂RR. The electrochemical properties of the electrolyzers with Pd/C and Cu cathodes are investigated. The Pd/C cathode shows a current density of 200 mA cm⁻² with CO Faradaic efficiency of 98% and energy efficiency of 48.8%, while the Cu cathode shows a current density of 350 mA cm⁻² with total CO₂RR Faradaic efficiency of 81.9% and energy efficiency of 30.5%. This work provides a promising demonstration of CO₂ electrolyzer using anion exchange membrane for CO₂ electrolysis at industrial current densities.

近年来，在电催化CO ₂还原反应（CO ₂ RR）上取得了重要进展。然而，用于CO ₂ RR的电解装置的研究和开发很少。在这里，我们使用阴离子交换膜开发用于CO ₂ RR的零间隙电解槽。研究了具有Pd / C和Cu阴极的电解槽的电化学性能。Pd / C阴极的电流密度为200 mA cm ^-2，CO法拉第效率为98％，能量效率为48.8％，而Cu阴极的电流密度为350 mA cm ^-2，总CO _2为法拉第RR效率为81.9％，能源效率为30.5％。这项工作为工业电流密度下使用阴离子交换膜进行CO ₂电解的CO ₂电解槽提供了有希望的演示。