Strategy of anchoring alloy nanoparticles made up of the efficient catalytic element(e.g.,Ni,Fe)on dodecyl sulfate(DS-)-intercalated NiFe layered double hydroxides(DS--NiFe LDH)obtained by a convenient one-step hydrothermal coprecipitation method for essentially enhancing oxygen evolution reaction(OER)performance was proposed.The results of structural characterization indicate Pt2FeNi alloy nanoparticles evenly distribute on the surface of DS--NiFe LDH.The sizes of the Pt2FeNi nanoparticles,closely related to their OER performance,could be well-controlled by adjusting the amount of H2PtCl6 addition.The composite structure of as-prepared product was stable during processes of synthesis,exfoliation,self-assembly,and subsequent electrocatalytic OER.Rigorous electrochemical test proving the contributing catalytic active sites was located at the interface between Pt2FeNi and DS--NiFe LDH,and the Ni and Fe were the major active elements while O atoms are adsorption sites.The formation of Pt2FeNi nanoparticles could greatly prompt the reduction of Tafel slope.The best-performing Pt2FeNi/DS--NiFe LDH with a Pt content of 0.98 wt％achieved low overpotential of 204 mV at 10 mA cm-2 and 262 mV at 50 mA cm-2.This work provides a convenient and effective strategy to create additional active sites for enhancing OER performance of NiFe LDH and make contribution to its wide application.

Zhicheng Zheng;Yanru Guo;Hao Wan;Gen Chen;Ning Zhang;Wei Ma;Xiaohe Liu;Shuquan Liang;Renzhi Ma

School of Materials Science and Engineering,Central South University,Changsha Hunan 410083,China;College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China;School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China;International Center for Materials Nanoarchitectonics(WPI-MANA),National Institute for Materials Science(NIMS),Namiki 1-1,Tsukuba,Ibaraki 305-0044,Japan

能源与环境材料（英文）

[1]Zhicheng Zheng;Yanru Guo;Hao Wan;Gen Chen;Ning Zhang;Wei Ma;Xiaohe Liu;Shuquan Liang;Renzhi Ma-.Anchoring Active Sites by Pt2FeNi Alloy Nanoparticles on NiFe Layered Double Hydroxides for Efficient Electrocatalytic Oxygen Evolution Reaction)[J].能源与环境材料（英文）,2022(01):270-277

Pt2FeNi,H2PtCl6

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