文献类型：期刊文献

英文题名：Toward High-Performance CO2-to-C2 Electroreduction via Linker Tuning on MOF-Derived Catalysts

作者：Chen, Rongzhen[1];Cheng, Ling[2];Liu, Jinze[2];Wang, Yating[1];Ge, Wangxin[1];Xiao, Chuqian[1];Jiang, Hao[1];Li, Yuhang[1];Li, Chunzhong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：18

期号：18

外文期刊名：SMALL

收录：;EI(收录号：20221411885610);WOS:【SCI-EXPANDED(收录号:WOS:000777534300001)】；

基金：This work was supported by the National Natural Science Foundation of China (22178104, 21838003, 91834301, and 22008069), the Shanghai Scientific and Technological Innovation Project (18JC1410500 and 19JC1410400), the Innovation Program of Shanghai Municipal Education Commission, "the Fundamental Research Funds for the Central Universities" (222201718002), and the Shanghai Sailing Program (20YF1410200).

语种：英文

外文关键词：C; (2) products; CO; (2) electroreduction; Cu metal-organic frameworks; organic linkers

摘要：Copper (Cu)-based metal-organic frameworks (MOFs) and MOF-derived catalysts are well studied for electroreduction of carbon dioxide (CO2); however, the effects of organic linkers for the selectivity of CO2 reduction are still unrevealed. Here, a series of Cu-based MOF-derived catalysts is investigated with different organic linkers appended, named X-Cu-BDC (BDC = 1,4-benzenedicarboxylic acid, X = NH2, OH, H, F, and 2F). It is found that the linkers affect the faradaic efficiency (FE) for C-2 products with an order of NH2- < OH- < bare Cu-BDC < F- < 2F-, thus tuning the FEC2:FEC1 ratios from 0.6 to 3.8. As a result, the highest C-2 FE of approximate to 63% at a current density of 150 mA cm(-2) on 2F-Cu-BDC derived catalyst is achieved. Using operando Raman measurements, it is revealed that the MOF derives to Cu2O during eCO(2)RR but organic linkers are stable. The fluorine group in organic linker can promote the H2O dissociation to *H species, further facilitating the hydrogenation of *CO to *CHO that helps C-C coupling.