二氧化碳电催化还原酸性体系研究进展

Recent Developments in the Electrocatalytic Reduction of CO_(2) in Acidic Environments

利用可再生能源提供的电能电催化还原CO_(2)制高值化学品和燃料,为全球气候变暖和能源危机提供了一种可行的解决方案,具有巨大的实际应用潜力。目前研究较多的碱性和中性反应体系中CO_(2)易与氢氧根(OH^(-))反应生成碳酸盐或碳酸氢盐,造成CO_(2)损失的同时会降低反应体系的能量转化效率和稳定性。研究开发酸性体系的电催化还原CO_(2)反应(CO_(2)RR),有望解决上述问题。本文针对CO_(2)电催化还原的酸性体系展开讨论,系统整理了反应装置、催化剂、反应微环境对CO_(2)RR性能的影响以及酸性体系中的微观反应机理,最后针对酸性体系中催化剂设计、反应机理研究、反应微环境调控、反应器设计优化等提出前瞻性建议。

Electrocatalytic conversion of CO_(2) into high-value chemicals and fuels by renewable energy provides a viable approach to the global climate change and energy crisis,and its development has great potential for practical production.At present,most of the basic and neutral reaction systems studied,CO_(2) is liable to interact with hydroxide(OH-)to form carbonate or bicarbonate,resulting in CO_(2) loss,lowering the energy conversion efficiency and stability of the reaction system.The above problems will be solved by the research and development of electrocatalytic CO_(2) reduction reaction(CO_(2)RR)in acid.This review has shed light on the effects of reaction device,catalyst,reaction microenvironment on the performance of CO_(2)RR and the microscopic reaction mechanism systematically in acidic CO_(2)RR.Finally,foresight tactics are put forward for catalyst design,reaction mechanism research,reaction microenvironment regulation,and reactor design and optimization in acidic CO_(2)RR.