Designing heterostructured FeP–CoP for oxygen evolution reaction:Interface engineering to enhance electrocatalytic performance
作者机构：Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin Key Laboratory of Advanced Functional Porous MaterialsTianjin University of TechnologyTianjin 300384China Institute of New Energy TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Flexible Electronics(KLOFE)Institute of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)Nanjing 211816China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第5期
页 面：6601-6607页
核心收录：
学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学] 0702[理学-物理学]
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).
主 题：electrocatalysts interface engineering FeP–CoP heterostructures oxygen evolution reaction synergistic effect
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.
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