电解液调控CO_(2)电催化还原性能微观机制的研究进展  

Research Progress for the Role of Electrolytes in the CO_(2) Electrochemical Reduction

作　　者：彭奎霖 李桂林 江重阳 曾少娟[1,3] 张香平 PENG Kuilin;LI Guilin;JIANG Chongyang;ZENG Shaojuan;ZHANG Xiangping(Beijing Key Laboratory of Ionic Liquids Clean Process,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Advanced Energy Science and Technology Guangdong Laboratory,Huizhou 516007,China)

机构地区：[1]中国科学院过程工程研究所,离子液体清洁过程北京市重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]先进能源科学与技术广东省实验室,惠州516007

出　　处：《高等学校化学学报》2022年第7期113-122,共10页Chemical Journal of Chinese Universities

基　　金：国家重点研发计划项目(批准号:2020YFA0710200);国家自然科学基金(批准号:21838010);中国科学院国际合作项目(批准号:122111KYSB20190029)资助.

摘　　要：二氧化碳(CO_(2))排放导致了严重的温室效应,但作为重要的碳资源,CO_(2)电催化还原合成化学品因反应条件温和、反应产物可调及可有效利用分布式电能等优势而备受关注.在该反应体系中,电解液作为反应介质,可提供质子和反应微环境,影响分子/离子传输.因此,构建新型电解液体系对于提高CO_(2)电催化还原产物的选择性和电流密度起到重要作用.本文综合评述了CO_(2)电催化还原过程中电解液的作用和研究现状,重点总结了水系电解液中阴阳离子(碱金属阳离子、卤素离子等)和离子液体电解液对CO_(2)溶解度、界面双电层结构(pH值、电场效应)和中间体稳定性等的影响机制,揭示了其调控对反应产物的选择性、电流密度等的影响规律.最后,对电解液调控CO_(2)电催化还原性能的研究进行了展望.CO_(2) emissions lead to serious greenhouse effect.However,as an important carbon resource,conversion of CO_(2) into useful chemicals by electrochemical CO_(2) reduction reaction(CO_(2)RR)have attracted much attention due to mild reaction conditions,adjustable reaction products,and effective utilization of distributed electric energy.In the electrochemical reaction systems,electrolyte as the reaction medium can provide protons and reaction microenvironment and affect the molecule/ion transportation.Therefore,the construction of new electrolyte systems plays an important role in improving product selectivity and current density for CO_(2)RR.This paper mainly reviews recent research progress of the role of electrolytes for the CO_(2)RR,and summarizes emphatically the effects of ions(alkali metal ions,halide ions,etc.)in aqueous solutions and ionic liquid electrolytes on CO_(2) solubility,interfacial electric double layer structures(pH value,electric field effect),and intermediate stability.This paper reveals the influence mechanism of the electrolytes on the selectivity of reaction products and current density,which provide guidance for the design of new electrolyte systems for the CO_(2)RR.

关 键 词：二氧化碳电催化还原 微观作用机制 水系电解液 离子液体 

分 类 号：O646[理学—物理化学] TQ21[理学—化学]