Identification of the optimal doping position of hetero-atoms in chalcogen-doped Fe-N-C catalysts for oxygen reduction reaction
作者机构：School of Materials Science and EngineeringBeihang UniversityBeijing100191China School of Space and EnvironmentBeihang UniversityBeijing102206China Tianmushan LaboratoryHangzhou310023China
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2024年第89卷第6期
页 面：99-108页
核心收录：
学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 1002[医学-临床医学] 081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by the National Key Research and Development Program of China(grant No.2021YFB4000601) Natural Science Foundation of Beijing Municipality(grant No.Z200012) National Natural Science Foundation of China(grant No.21975010,U21A20328) the China Postdoctoral Science Foundation(grant No.2022M720013)
主 题：Oxygen reduction reaction Fe-N-C catalysts Hetero-atom doping Doping position Enhancement mechanism
摘 要：The excellent oxygen reduction reaction(ORR)activity of Fe–N–C catalysts in acidic media makes them potential for low-cost proton exchange membrane fuel *** recent years,it has been shown that heteroatoms(B,O,S,P,Cl,F,etc.)can be used as electron-withdrawing groups to modulate the planar structure and electron distribution of the Fe–Nx active sites to achieve simultaneous improvement of catalytic activity and ***,the optimal location of the heteroatoms remains ***,taking chalcogen heteroatoms(S and Se)as an example,we control the doping positions and investigate their effect on the ORR performance of the Fe–N–C *** first coordination shell of the iron single atom is identified as the optimal doping *** optimized catalysts Fe–N_(3)Se_(1)/NC and Fe–N_(3)Se_(1)/NC demonstrate improved activity and stability in both half cells and fuel *** work provides insights into the enhancement mechanism of heteroatom doping in single-atom catalysts.
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