文献类型：期刊文献

英文题名：Tuning the Microenvironment in Monolayer MgAl Layered Double Hydroxide for CO2-to-Ethylene Electrocatalysis in Neutral Media

作者：Xu, Yi Ning[1];Li, Wenjing[1];Fu, Huai Qin[2];Zhang, Xin Yu[1];Zhao, Jia Yue[1];Wu, Xuefeng[1];Yuan, Hai Yang[1];Zhu, Minghui[3];Dai, Sheng[4,5];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Griffith Univ, Ctr Catalysis & Clean Energy, Gold Coast Campus, Gold Coast, Qld 4222, Australia;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, China Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：62

期号：19

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20231413853679);WOS:【SCI-EXPANDED(收录号:WOS:000962704200001)】；

基金：This work was financially supported by the Science and Technology Commission of Shanghai Municipality (21DZ1207101, 22ZR1416400), the Key Program of National Natural Science Foundation of China (22239001), the International (Regional) Cooperation and Exchange Projects of the National Natural Science Foundation of China (51920105003), the National Natural Science Funds for Distinguished Young Scholars (51725201), the Innovation Program of Shanghai Municipal Education Commission (E00014), China Postdoctoral Science Foundation Funded Project (2022M721137), the Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400). Additional support was provided by the Feringa Nobel Prize Scientist Joint Research Center. The authors also thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry. The authors also thank the crew of the BL14W1 beamline at the Shanghai Synchrotron Radiation Facility (SSRF) and the 1W1B beamline of Beijing Synchrotron Radiation Facility (BSRF) for their constructive assistance with the XAFS measurements and data analyses.

语种：英文

外文关键词：CO2 Electrocatalysis; Ethylene Selectivity; MgAl-LDH; Microenvironment; Water Dissociation

摘要：The electrocatalytic reduction of carbon dioxide provides a feasibility to achieve a carbon-neutral energy cycle. However, there are a number of bottleneck issues to be resolved before industrial application, such as the low conversion efficiency, selectivity and reaction rate, etc. Engineering local environment is a critical way to address these challenges. Here, a monolayer MgAl-LDH was proposed to optimize the local environment of Cu for stimulating industrial-current-density CO2-to-C2H4 electroreduction in neutral media. In situ spectroscopic results and theoretical study demonstrated that the Cu electrode modified by MgAl-LDH (MgAl-LDH/Cu) displayed a much higher surface pH value compared to the bare Cu, which could be attributed to the decreased energy barrier for hydrolysis on MgAl-LDH sites with more OH- ions on the surface of the electrode. As a result, MgAl-LDH/Cu achieved a C2H4 Faradaic efficiency of 55.1 % at a current density up to 300 mA cm(-2) in 1.0 M KHCO3 electrolyte.