首页|Unveiling the intrinsic properties of single NiZnFeOx entity for promoting electrocatalytic oxygen evolution
Unveiling the intrinsic properties of single NiZnFeOx entity for promoting electrocatalytic oxygen evolution
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Although considerable research efforts have been devoted to the design and development of non-noble electrocatalysts for oxygen evolution reaction(OER),substantial enhancement of OER performance with commercial-scale water electrolysis remains a big challenge.This could result from the difficulties in detecting the intrinsic properties and overlooking the assembly process for electrochemical OER pro-cess.Here,we employ a microjet collision method to investigate the intrinsic OER activities of individ-ual NiZnFeOx entities with and without a moderate magnetic field.Our results demonstrate that single NiZnFeOx nanoparticles(NPs)show the excellent OER performance with a lowest onset potential(～1.35V vs.RHE)and a greatest magnetic enhancement(～118％)among bulk materials,single agglomerations and NPs.Furthermore,we explore the utility of theoretical investigation by density functional theory(DFT)calculations for studying OER process on NiZnFeOx surfaces without and with spin alignment,indicating monodispersed NiZnFeOx NPs with totally spin alignment facilitates the OER process under the external magnetic field.It is found that the well-dispersion of NiZnFeOx NPs would increase the electrical conduc-tivity and the surface spin state,resulting in promoting their OER activities.This work provides a test for uncovering the essential roles of NPs assembly to a significant promotion of their magnet-assisted OER.
Single entityOERMagnetic enhancementElectrocatalysisWell-dispersion
Zhihao Gu、Jiabo Le、Hehe Wei、Zehui Sun、Mahmoud Elsayed Hafez、Wei Ma
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Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China
Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China
Department of Chemistry,Faculty of Science,Beni-Suef University,Beni-Suef 62511,Egypt
Major Research Project国家自然科学基金Shanghai Municipal Science and Technology Major ProjectXiamen University Opening Project of PCOSSYONGJIANG Talent Introduction Programme
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