Operando reconstruction towards stable CuI nanodots with favorable facets for selective CO_(2) electroreduction to C2H4

作     者：Wenjie Xue Hongxia Liu Xinqing Chen Xiaoju Yang Ruoou Yang Youwen Liu Minghao Li Xuan Yang Bao Yu Xia Bo You Wenjie Xue;Hongxia Liu;Xnqing Chen;Xiaju Yang;Ruoou Yang;Youwen Liu;Minghao Li;Xuan Yang;Bao Yu Xia;Bo You

作者机构：Key Laboratory of Material Chemistry for Energy Conversion and StorageMinistry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Chemistry and Chemical EngineeringWuhan Textile UniversityWuhan 430200China Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China State Key Laboratory of Materials Processing and Die&Mold Technologyand School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2023年第66卷第6期

页      面：1834-1843页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by The National Key Research and Development Program of China(2021YFA1600800) the Start-up Funding of the Huazhong University of Science and Technology(HUST) the Program for HUST Academic Frontier Youth Team the National Natural Science Foundation of China(22075092) the National 1000 Young Talents Program of China and The Innovation and Talent Recruitment Base of New Energy Chemistry and Device(B21003) 

主　　题：CO_(2)reduction reaction cuprous iodide favorable facets halogen electrolyte reconstruction 

摘      要：Cu-based electrocatalysts with favorable facets and Cu^(+)can boost CO_(2) reduction to valuable multicarbon ***,the inevitable Cu^(+)reduction and the phase evolution usually result in poor ***,we fabricate CuI nanodots with favorable(220)facets and a stable Cu^(+)state,accomplished by operando reconstruction of Cu(OH)_(2) under CO_(2)-and I--containing electrolytes for enhanced CO_(2)-to-C_(2)H_(4) *** X-ray absorption spectroscopy(XAS),in-situ Raman spectroscopy and thermodynamic potential analysis reveal the preferred formation of *** gas electroresponse and density functional theory(DFT)calculations reveal that CO_(2)-related species induce the exposure of the(220)plane of Cu ***,the small size of nanodots enables the adequate contact with I^(-),which guarantees the rapid formation of Cu I instead of the electroreduction to Cu^(0).As a result,the resulting catalysts exhibit a high C2H4 Faradaic efficiency of 72.4%at a large current density of 800 m A cm^(-2) and robust stability for 12 h in a flow *** in-situ ATR-SEIRS spectroscopic characterizations and DFT calculations indicate that the(220)facets and stable Cu^(+) in CuI nanodots synergistically facilitate CO_(2)/*CO adsorption and*CO dimerization.