Transmute CO₂ to value-added chemical products by electrochemical reduction is a potential candidate and a highly providential route to mitigate CO₂ levels in atmosphere and meet the energy and global warming crisis. Recent reported studies have focused on advancement of novel electro-catalysts with outstanding performance, but unfortunately, little attention has been paid to the influence of reactor design. In this contribution, we for the first time comprehensively review all types of electrolytic cells reported in literatures and compare their features, advantages and disadvantages for CO₂ electro-reduction. To date, H-type cell is still the well-known typical reactor for CO₂RR, typically for screening electro-catalysts. Based on H-type cell, a similar modified sandwich-type cell is designed to reduce system resistance. However, for industrialization, the flow cell in which the reactants and products are continuously transferred to and away from the electrodes, need further advancement because of its efficient mass transfer efficiency. Besides, the DEMS cell is an effective way to detect products efficiently in real time and analyze reaction process, which is useful for seeking reaction mechanism. The perspectives and challenges for the development of electrochemical cells are also addressed. We hopeful, this review should provide researchers with a clearer understanding of reactor selection, and impart important, timely and valuable insights into the design of advance electrolytic cells and its practical applications for CO₂ reduction.

通过电化学还原将CO ₂转化为高附加值的化学产品是减少大气中CO ₂含量并应对能源和全球变暖危机的潜在候选者，并且是一条非常有益的途径。最近报道的研究集中在具有优异性能的新型电催化剂的发展上，但是不幸的是，很少有人关注反应器设计的影响。在此贡献中，我们首次全面回顾了文献中报道的所有类型的电解池，并比较了它们在CO ₂电解还原中的特点，优点和缺点。迄今为止，H型电池仍是众所周知的典型CO ₂反应器RR，通常用于筛选电催化剂。基于H型电池，设计了一种类似的改进型夹心型电池，以降低系统电阻。然而，对于工业化而言，由于反应物和产物的有效传质效率，其中反应物和产物连续转移至电极和从电极移出的流通池需要进一步发展。此外，DEMS单元是一种有效地实时检测产物并分析反应过程的有效方法，对于寻找反应机理非常有用。还讨论了电化学电池开发的观点和挑战。我们希望，这篇评论可以使研究人员对反应堆的选择有更清晰的了解，并传授重要的，₂减少。