The electrocatalytic carbon dioxide reduction reaction (CO₂RR) provides a way to use CO₂ to produce valuable fuels and feedstocks powered by renewable electricity. Considerable efforts have been put into the development of catalysts with the aim to achieve high CO₂RR performance, i.e., high activity, high product selectivity, and low overpotentials. However, few reports have been focused on the studies of electrolyzers, which are the key component toward the implementation of CO₂RR on commercial scales. In this review, we overview the configurations and operating principles of widely used electrolyzers and summarize advantages and disadvantages of each. We discuss in detail recent progress of the membrane electrode assembly (MEA) electrolyzer, which is believed to be promising for commercialization of the CO₂RR. Finally, we look at challenges and suggest strategies for future development of MEA electrolyzers.

电催化二氧化碳还原反应（CO ₂ RR）提供了一种使用CO ₂生产可再生电力驱动的有价值的燃料和原料的方法。为了实现高CO ₂ RR性能，即高活性，高产物选择性和低过电势，已经在催化剂的开发上付出了巨大的努力。但是，很少有报道关注电解槽的研究，而电解槽是实施CO ₂的关键因素商业规模的RR。在这篇综述中，我们概述了广泛使用的电解槽的配置和工作原理，并总结了每种电解槽的优缺点。我们将详细讨论膜电极组件（MEA）电解器的最新进展，据认为这对于CO ₂ RR的商业化是有前途的。最后，我们着眼于挑战并为MEA电解槽的未来发展提出了策略。