文献类型：期刊文献

英文题名：Modulating OER activity in Ni-Co-based catalysts via non-metal atom-induced electron excitation

作者：Fu, Qianqian Nie, Kunlun Wang, Min Ma, Xianguo Ren, Jianwei Cui, Mengqi Wang, Hui

第一作者：Fu, Qianqian

通信作者：Ma, XG[1];Wang, H[2];Ren, JW[3]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China;[3]Univ Johannesburg, Dept Mech Engn Sci, Cnr Kingsway & Univ Rd, ZA-2092 Johannesburg, South Africa;[4]Changshu Inst Hydrogen Energy, Changshu 215505, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China;corresponding author), Univ Johannesburg, Dept Mech Engn Sci, Cnr Kingsway & Univ Rd, ZA-2092 Johannesburg, South Africa.|贵州理工学院化学工程学院;贵州理工学院;

年份：2024

卷号：982

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20240715554499);Scopus(收录号：2-s2.0-85184803501);WOS:【SCI-EXPANDED(收录号:WOS:001183290400001)】；

基金：The authors thank the National Natural Science Foundation of China (51963004) , and the Natural Science Foundation of Shandong Province of China (ZR2020MB024) for financially supporting this work.

语种：英文

外文关键词：Oxygen evolution reaction; Non-metal atoms; Electronegativity; Electron effect; Molecular orbitals

摘要：Efficient and cost-effective oxygen evolution reaction (OER) catalysts are crucial for advancing energy conversion and storage technologies such as water electrolysis and metal-air batteries. However, the performance assessment of catalysts has been complicated by the diversity of material microstructures and electrochemical testing variables. In this study, the solvothermal and chemical vapor deposition methods were employed to synthesize several NiCo-based compounds with similar microstructures but incorporating different non-metal atoms (O, P, S, and Se). By ensuring a comparable density of electrochemically active sites, the influence of non-metal atoms on the electronic structure and catalytic activity were investigated. Characterization and molecular orbital theory confirmed that electronic coupling enabled the redistribution of atomic charge transfer in the NiCo2S4 (NCS) sample with bridging O2- and S2-. Electrochemical tests of the optimal catalyst in 1 M KOH demonstrated a lower Tafel slope (111 mV dec(-1)) and higher conductivity. The catalyst required only a 353 mV overpotential to achieve 100 mA cm(-2), and the subsequent chronoamperometry displayed a 98 % retention rate over 48 h. Such insights into the selection of non-metal atom provides a pathway for designing and preparing efficient catalysts.