Atomic Fe-N_4 sites on electrospun hierarchical porous carbon nanofibers as an efficient electrocatalyst for oxygen reduction reaction |
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| Institution: | 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2. Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China;3. Neutron Scattering Laboratory, China Institute of Atomic Energy, Beijing 102413, China;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2. Beijing Key Lab of Theory and Technology for Advanced Battery Materials, School of Materials Science and Engineering, Peking University, Beijing 100871, China;3. School of Molecular Sciences, The University of Western Australia, Perth, WA 6009, Australia;1. State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, PR China;3. College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK |
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| Abstract: | Porous carbon materials doped with atomically dispersed metal sites(ADMSs) are promising electrocatalysts for oxygen reduction reaction(ORR) electrocatalysis.In this work,we fabricated hierarchical porous nitrogen-doped carbon nanofibers with atomically dispersed Fe-N_4 sites by carbonization of electrospinning iron-based metal-organic frameworks(MOFs)/polyacrylonitrile nanofibers for ORR electrocatalysis.Remarkably,the re sultant carbon nanofibers with atomically dispersed FeN_4 sites exhibit extraordinary electrochemical performance with an onset potential of 0.994 V and a halfwave potential of 0.876 V in alkaline electrolyte,comparable to the benchmark commercial Pt/C catalyst.The high catalytic performance is originated from the unique hierarchically porous 1 D carbon structure and abundant highly active atomically dispersed Fe-N_4 sites. |
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| Keywords: | Atomically dispersed metal sites Metal-organic frameworks Electrospinning Oxygen reduction reaction Electrocatalysis |
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