Hierarchically porous N-doped carbon confined single-atom Fe catalyst for efficient electrochemical CO_(2) reduction  

作　　者：Guanghuan Ma Yang Chen Hui Li Ying Sun Hua Fan Shuoshuo Jiang Xin Cui Tianyi Ma 

机构地区：[1]Institute of Clean Energy Chemistry,Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning Province,College of Chemistry,Liaoning University,Shenyang 110036,China [2]Centre for Atomaterials and Nanomanufacturing(CAN),School of Science,RMIT University,Melbourne,VIC 3000,Australia [3]ARC Industrial Transformation Research Hub for Intelligent Energy Efficiency in Future Protected Cropping(E2Crop),Melbourne,VIC 3000,Australia [4]Aqualux AU Pty Ltd,12 Kanangra Cres,Clontarf,NSW 2093,Australia

出　　处：《Nano Research》2025年第4期106-115,共10页纳米研究(英文版)

基　　金：supported by the Australian Research Council(ARC)through Future Fellowship(FT210100298);Discovery Project(DP220100603);Linkage Project(LP210200504,LP220100088,LP230200897);Industrial Transformation Research Hub(IH240100009)schemes;the China Postdoctoral Science Foundation(2023M743430);the Australian Government through the Cooperative Research Centres Projects(CRCPXIII000077);the Australian Renewable Energy Agency(ARENA)as part of ARENA’s Transformative Research Accelerating Commercialisation Program(TM021);European Commission's Australia-Spain Network for Innovation and Research Excellence(AuSpire).

摘　　要：Electrochemical CO_(2) reduction reaction(CO_(2)RR)is a promising process for reducing CO_(2) emissions and producing high-value chemicals.However,this process remains hindered by diffusion-limited mass transfer,low activity,and high overpotentials.Here,we controllably prepared hierarchically porous nitrogen-doped carbon,carbon nanosheets,and carbon nanotubes confined single-atom Fe catalysts for electrochemical CO_(2) reduction.The hierarchically porous Fe-N-C(Fe-HP)exhibited prominent performance with a Faradaic efficiency of CO(FECO)up to 80% and a CO partial current density(jCO)of -5.2 mA·cm^(-2) at -0.5 V vs.reversible hydrogen electrode(RHE),far outperforming the single-atom Fe on N-C nanosheets(Fe-NS)and N-C nanotubes(Fe-NT).The detailed characterizations and kinetic analysis revealed that the hierarchically porous structure accelerated the mass transfer and electron transfer processes toward single-atom Fe sites,promoting the desorption of CO and thereby enhancing CO_(2) reduction efficiency.This study provides a promising approach to designing efficient single-atom catalysts with porous structures for energy conversion applications.

关 键 词：single-atom catalysts Fe-N-C CO_(2)reduction porous structure ELECTROCATALYSIS 

分 类 号：O643.36[理学—物理化学]