Synthesis of one-dimensional vanadium-doped CoS/Co9S8 heterojunctions as bifunctional electrocatalysts for zinc-air battery

被引：29
作者：
Huang, Huiyong [1 ]
Liu, Anmin [2 ]
Kang, Qiaoling [3 ]
Ye, Xinyu [1 ]
Chen, Hanlin [1 ]
Su, Wei-Nien [4 ]
Ma, Tingli [1 ,3 ]
机构：
[1] Kyushu Inst Technol, Grad Sch Life Sci & Syst Engn, Wakamatsu Ku, 2-4 Hibikino, Kitakyushu, Fukuoka 8080196, Japan
[2] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Panjin Campus, Panjin 124221, Peoples R China
[3] China Jiliang Univ, Coll Mat & Chem, 258 Xueyuan St, Hangzhou 310018, Zhejiang, Peoples R China
[4] Natl Taiwan Univ Sci & Technol, Grad Inst Appl Sci & Technol, Taipei, Taiwan
来源：
MATERIALS TODAY ENERGY | 2022年 / 25卷
基金：
中国国家自然科学基金;
关键词：
Electronic structure; One step; OER; Interface function; DFT; HIGHLY EFFICIENT; COBALT;
D O I：
10.1016/j.mtener.2022.100968
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Cobalt-based electrocatalysts have been considered promising materials for the oxygen evolution reaction (OER). Herein, we now report the synthesis of vanadium-doped CoS/Co9S8 heterostructures embedded on carbon nanorods (V-CoS/Co9S8@CNR), which was realized through one-step sulfurization of Zeolitic Imidazolate Framework-67 (ZIF-67) grown on V2O5 nanorods (V2O5@ZIF-67). The results of experiment and theoretical calculation verified that because of the vanadium dopant and the coupled nanointerface that can expedite the synergistic effect of Co9S8 and CoS, the obtained V-CoS/Co9S8@CNR showed an excellent OER catalytic performance (269 mV@10 mA/cm2) and comparable ORR catalytic performance. The assembled rechargeable Zn-air batteries displayed a superior performance as well as high charging-discharging cycling stability (>200 h) with a slight increase in the voltage gap. (c) 2022 Elsevier Ltd. All rights reserved.
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页数：6
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