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Designing heterostructured FeP–CoP for oxygen evolution reaction:Interface engineering to enhance electrocatalytic performance

查看全文 作　　者：Shuang [1,2]Hou;Ansai [1]Zhang;Qi [1]Zhou;Yingjie [2]Wen;Sixie [2,3]Zhang;Linfeng [2]Su;Xinjie [2]Huang;Tian [2]Wang;Kun [4]Rui;Cheng [1]Wang;Huiling [1]Liu;Zhiyi [2,3]Lu;Peilei [2,3]He 高影响力作者 机构地区：[1]Institute for New Energy Materials and Low-Carbon Technologies,School of Materials Science and Engineering,Tianjin Key Laboratory of Advanced Functional Porous Materials,Tianjin University of Technology,Tianjin 300384,China;[2]Institute of New Energy Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;[3]University of Chinese Academy of Sciences,Beijing 100049,China;[4]Key Laboratory of Flexible Electronics(KLOFE),Institute of Advanced Materials(IAM),Nanjing Tech University(NanjingTech),Nanjing 211816,China高影响力机构 出　　处：《Nano Research》索引2023年第16卷第5期,共7页高影响力期刊 基　　金：the National Natural Science Foundation of China(Nos.22101289 and 22275138);the Hundred Talents Programs in Chinese Academy of Science,the National Key Research and Development Project(No.2021YFA1502200);the Bellwethers Project of Zhejiang Research and Development Plan(No.2022C01158);the Ningbo Yongjiang Talent Introduction Programme(No.2021A-111-G). 摘　　要：It is significant to develop highly efficient electrocatalysts for energy conversion systems.Interface engineering is one of the most feasible approaches to effectively enhance the electrocatalytic activity.Herein,the density functional theory(DFT)calculations predict that the potential barriers of Fe sites at the interface of FeP–CoP heterostructures are lower than that of Fe sites in FeP nanoparticles(NPs),Co sites in CoP NPs,or Co sites in heterostructures.Motivated by the DFT calculation results,FeP–CoP heterostructures have been designed and synthesized by a metal–organic frameworks(MOFs)confined-phosphorization method.The FeP–CoP exhibits the lowest overpotential of 230 mV at the current density of 10 mA·cm^(−2)for oxygen evolution reaction(OER),compared with FeP(470 mV)and CoP(340 mV),which outperforms most of transition metal-based catalysts.The Tafel analysis of FeP–CoP heterostructures shows an improved reaction kinetic pathway with the smallest slope of 90.3 mV·dec^(−1),as compared to the Tafel slopes of FeP NPs(137 mV·dec^(−1))and CoP NPs(114 mV·dec^(−1)).And the FeP–CoP shows extraordinary long-term stability over 24 h.The excellent activity and long-term stability of FeP–CoP derive from the synergistic effect between FeP and CoP. 关 键 词：ELECTROCATALYSTS interface engineering FeP–CoP heterostructures oxygen evolution reaction synergistic effect
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