文献类型：期刊文献

英文题名：Redox-mediated electrosynthesis of ethylene oxide from CO2 and water

作者：Li, Yuhang[1,2];Ozden, Adnan[3];Leow, Wan Ru[1,4];Ou, Pengfei[1];Huang, Jianan Erick[1];Wang, Yuhang[1];Bertens, Koen[1];Xu, Yi[3];Liu, Yuan[1];Roy, Claudie[5];Jiang, Hao[2,6];Sinton, David[3];Li, Chunzhong[2,6];Sargent, Edward H.[1]

机构：[1]Univ Toronto, Dept Elect & Comp Engn, Toronto, ON, Canada;[2]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai Engn Res Ctr Hierarch Nanomat, Key Lab Ultrafine Mat,Minist Educ,Sch Mat Sci & E, Shanghai, Peoples R China;[3]Univ Toronto, Dept Mech & Ind Engn, Toronto, ON, Canada;[4]ASTAR, Inst Mat Res & Engn, Innovis, Singapore, Singapore;[5]Natl Res Council Canada NRC CNRC, Energy Min & Environm, Mississauga, ON, Canada;[6]East China Univ Sci & Technol, Sch Chem Engn, Shanghai, Peoples R China

年份：2022

卷号：5

期号：3

起止页码：185

外文期刊名：NATURE CATALYSIS

收录：;EI(收录号：20220911708690);WOS:【SCI-EXPANDED(收录号:WOS:000761902100001)】；

基金：This work was supported by the National Research Council Materials for Clean Fuels program (MCF-109), the Ontario Ministry of Colleges and Universities (grant ORF-RE08-034) and the Natural Sciences and Engineering Research Council (NSERC) of Canada (grant RGPIN-2017-06477). We thank P. Karimi, X. Wang, Y. C. Li, J. P. Edwards and C. P. O'Brien for discussions. Y. Li acknowledges financial support from the China Scholarship Council (201906745001). W.R.L. acknowledges financial support from an A*STAR Young Individual Research Grant (grant number A2084c0180).

语种：英文

外文关键词：Iridium compounds - Ethylene - Metals - Catalysts - Industrial emissions - Barium compounds - Electrolytic reduction

摘要：The electrochemical production of ethylene oxide (EO) from CO2, water and renewable electricity could result in a net consumption of CO2. Unfortunately existing electrochemical CO2-to-EO conversions show impractical Faradaic efficiency (FE) and require a high energy input. Here we report a class of period-6-metal-oxide-modified iridium oxide catalysts that enable us to achieve improved CO2-to-EO conversion. Among barium, lanthanum, cerium and bismuth, we find that barium-oxide-loaded catalysts achieve an ethylene-to-EO FE of 90%. When we pair this with the oxygen reduction reaction at the cathode, we achieve an energy input of 5.3 MJ per kg of EO, comparable to that of existing (emissions-intensive) industrial processes. We have also devised a redox-mediated paired system that shows a 1.5-fold higher CO2-to-EO FE (35%) and uses a 1.2 V lower operating voltage than literature benchmark electrochemical systems.