文献类型：期刊文献

英文题名：The Effect of the Coordination Environment of Atomically Dispersed Fe and N Co-doped Carbon Nanosheets on CO2 Electroreduction

作者：Tuo, Jinqin[1];Zhu, Yihua[1];Jiang, Hongliang[2];Shen, Jianhua[1];Li, Chunzhong[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Ultra Fine Mat Minist Educ, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai Engn Res Ctr Hierarch Nanomat,Sch Mat Sc, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：7

期号：23

起止页码：4767

外文期刊名：CHEMELECTROCHEM

收录：;EI(收录号：20205009619101);WOS:【SCI-EXPANDED(收录号:WOS:000597323800009)】；

语种：英文

外文关键词：CO2 electroreduction; confinement anchoring effect; single atom; coordination environment

摘要：Single-atom metal and nitrogen co-doped carbon catalysts have caused an extensive research boom for electrochemical CO2 reduction reaction (CO2RR). The diversity of metal-N coordination environment at high temperature limits the accurate study of electrocatalytic active sites. In this work, Fe porphyrin is anchored on a nitrogen-doped graphene substrate through the coordination between Fe and N atoms to form atomically dispersed Fe and N co-doped graphene nanosheets. The confinement anchoring effect of the nitrogen-doped graphene substrate prevents Fe atoms from agglomerating into Fe nanoparticles. Apart from that, the different Fe-N coordination environments and their catalytic effects on CO2RR are investigated by temperature changes. Electrochemical tests and density functional theory (DFT) calculations indicate that the atomically dispersed saturated Fe-N coordination catalyst have excellent performance for CO2RR and the Faradaic efficiency towards CO can up to 97 % at a potential of -0.5 V (vs. reversible hydrogen electrode, RHE).