| Summary: | A stable life support system in the spacecraft can greatly promote long-duration, far-distance, and multicrew manned space flight. Therefore, controlling the concentration of CO<sub>2</sub> in the spacecraft is the main task in the regeneration system. The electrocatalytic CO<sub>2</sub> reduction can effectively treat the CO<sub>2</sub> generated by human metabolism. This technology has potential application value and good development prospect in the utilization of CO<sub>2</sub> in the space station. In this paper, recent research progress for the electrocatalytic reduction of CO<sub>2</sub> was reviewed. Although numerous promising accomplishments have been achieved in this field, substantial advances in electrocatalyst, electrolyte, and reactor design are yet needed for CO<sub>2</sub> utilization via an electrochemical conversion route. Here, we summarize the related works in the fields to address the challenge technology that can help to promote the electrocatalytic CO<sub>2</sub> reduction. Finally, we present the prospective opinions in the areas of the electrocatalytic CO<sub>2</sub> reduction, especially for the space station and spacecraft life support system.
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