Outer delocalized electron aggregation of bromide bridged core–shell CuBr@C for hydrogen evolution reaction  

作　　者：Tianyi Xu Ruoyu Li Lei Zhang Dongxu Jiao Yilong Dong Ming Gong Dantong Zhang Jinchang Fan Dewen Wang Yanhua Liu Xiao Zhao Wei Zhang Weitao Zheng Xiaoqiang Cui 

机构地区：[1]State Key Laboratory of Automotive Simulation and Control,School of Materials Science and Engineering,Key Laboratory of Automobile Materials of MOE,Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials,Electron Microscopy Center,Jilin University,Changchun 130012,China [2]College of Chemistry,Jilin University,Changchun 130012,China [3]Center of Multiscale Crystal Materials Research,Institute of Advanced Materials Science and Engineering,Shenzhen Intitute of Advanced Technology,Chinese Academy of Science,Shenzhen 518055,China

出　　处：《Nano Research》2023年第5期6608-6614,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51872116 and 12034002);Jilin Province Science and Technology Development Program(No.20210301009GX);Project for Self-innovation Capability Construction of Jilin Province Development and Reform Commission(No.2021C026);the Program for JLU Science and Technology Innovative Research Team(JLUSTIRT,No.2017TD-09);Jilin Province Science and Technology Development Program(No.20190201233JC);the Fundamental Research Funds for the Central Universities.

摘　　要：Modulation of the surface electron distribution is a challenging problem that determines the adsorption ability of catalytic process.Here,we address this challenge by bridging the inner and outer layers of the core–shell structure through the bridge Br atom.Carbon shell wrapped copper bromide nanorods(CuBr@C)are constructed for the first time by chemical vapour deposition with hexabromobenzene(HBB).HBB pyrolysis provides both bridge Br atom and C shells.The C shell protects the stability of the internal halide structure,while the bridge Br atom triggers the rearrangement of the surface electrons and exhibits excellent electrocatalytic activity.Impressively,the hydrogen evolution reaction(HER)activity of CuBr@C is significantly better than that of commercial N-doped carbon nanotubes,surpassing commercial Pt/C at over 200 mA·cm^(−2).Density functional theory(DFT)calculations reveal that bridge Br atoms inspire aggregation of delocalized electrons on C-shell surfaces,leading to optimization of hydrogen adsorption energy.

关 键 词：bridge Br atoms delocalized electron aggregation core–shell nanorods C-shell wrapped CuBr hydrogen evolution reaction 

分 类 号：O64[理学—物理化学]