Electron modulation by atomic Ir site decoration in porous Co/N co-doped carbon for electrocatalytic hydrogen evolution

作     者：Youkui Zhang Zitong Yan Yeli Gao Yaqin Fu Wenhao Li Yunxiang Lin Chuanqiang Wu Yujuan Pu Tao Duan Li Song Youkui Zhang;Zitong Yan;Yeli Gao;Yaqin Fu;Wenhao Li;Yunxiang Lin;Chuanqiang Wu;Yujuan Pu;Tao Duan;Li Song

作者机构：State Key Laboratory of Environment-Friendly Energy MaterialsNational Co-Innovation Center for Nuclear Waste Disposal and Environmental SafetySouthwest University of Science and TechnologyMianyang 621010China National Synchrotron Radiation LaboratoryChinese Academy of Sciences(CAS)Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230029China Institute of Physical Science and Information TechnologySchool of Materials Science and EngineeringAnhui Key Laboratory of Information Materials and DevicesKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationAnhui UniversityHefei 230601China College of Chemistry and Chemical EngineeringChongqing UniversityChongqing 401331China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第2期

页      面：2011-2019页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(No.21902129) Sichuan Science and Technology Program(Nos.2022NSFSC0260 and 2021JDTD0019) 

主　　题：electron modulation iridium decoration porous carbon electrocatalysis hydrogen evolution reaction 

摘      要：The rational design of materials at atomic scale as efficient and stable electrocatalysts for hydrogen evolution reaction(HER)is critical for energy ***,we report a novel hybrid nanostructure with iridium(Ir)and cobalt(Co)atomic pair configuration anchored in porous nitrogen-doped carbon(pNC)nanosheets(denoted as IrCo-pNC)for electrocatalytic *** investigations and theoretical calculations reveal that the interaction between Ir and Co species in pNC promotes electron accumulation and depletion around isolated Ir and Co atoms,respectively,resulting in a local asymmetry electron density *** functional theory calculations also suggest that the electrons transfer from Co to adjacent Ir atom causing the down shift of the d-band center of Ir 5d in IrCo-pNC catalyst,thus optimizing the adsorption of hydrogen on Ir *** as-prepared IrCo-pNC exhibits significant HER performance with an overpotential of 21 mV to achieve a current density of 10 mA·cm^(−2)in 0.5 M *** work provides insight into the role of asymmetry electron density distribution in nanomaterials in regulating HER electrocatalysis.