Ultrastable bimetallic Fe_(2)Mo for efficient oxygen reduction reaction in pH-universal applications
作者机构：The Engineering Laboratory of Advanced Battery and Materials of Yunnan ProvinceKunming University of Science and TechnologyKunming 650093China Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina School of Energy and Environment ScienceYunnan Normal UniversityKunming 650500China Ability R&D Energy Research CentreSchool of Energy and EnvironmentCity University of Hong KongHong KongChina
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第6期
页 面：4950-4957页
核心收录：
学科分类：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] 0703[理学-化学]
基 金：supported by the National Key R&D Program of China(No.2021YFA1501101) the National Nature Science Foundation of China(Nos.21862011,21771156,and 51864024) Yunnan province(No.2019FI003) the Shenzhen Knowledge Innovation Program(Basic Research,No.JCYJ20190808181205752) the Research Grants Council(RGC)of the Hong Kong Special Administrative Region,China(Project No.CityU 11206520) the National Natural Science Foundation of China/RGC Joint Research Scheme(No.N_PolyU502/21) the funding for Projects of Strategic Importance of The Hong Kong Polytechnic University(Project Code:1-ZE2V)
主 题：oxygen reduction reaction Fe2Mo bimetallic nanoparticles zeolitic imidazolate frameworks(ZIFs) ultralong stability superior oxygen reduction reaction(ORR)performance
摘 要：Iron-based nanostructures represent an emerging class of catalysts with high electroactivity for oxygen reduction reaction(ORR)in energy storage and conversion ***,current practical applications have been limited by insufficient durability in both alkaline and acidic *** particular,limited attention has been paid to stabilizing iron-based catalysts by introducing additional metal by the alloying ***,we report bimetallic Fe_(2)Mo nanoparticles on N-doped carbon(Fe_(2)Mo/NC)as an efficient and ultra-stable ORR electrocatalyst for the first *** Fe_(2)Mo/NC catalyst shows high selectivity for a four-electron pathway of ORR and remarkable electrocatalytic activity with high kinetics current density and half-wave potential as well as low Tafel slope in both acidic and alkaline *** demonstrates excellent long-term durability with no activity loss even after 10,000 potential *** functional theory(DFT)calculations have confirmed the modulated electronic structure of formed Fe_(2)Mo,which supports the electron-rich structure for the ORR ***,the mutual protection between Fe and Mo sites guarantees efficient electron transfer and long-term stability,especially under the alkaline *** work has supplied an effective strategy to solve the dilemma between high electroactivity and long-term durability for the Fe-based electrocatalysts,which opens a new direction of developing novel electrocatalyst systems for future research.
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