Improving oxygen evolution reaction activity by constructing core-shell structure of Co/N-doped carbon polyhedron@NiCo layered double hydroxides

被引:14
作者
Chen, Zhida [1 ]
Zhang, Yu [1 ]
Yang, Penggang [1 ]
Xiong, Wei [1 ]
Ren, Xiangzhong [1 ]
Li, Yongliang [1 ]
Wang, Lanlan [3 ]
Ye, Shenghua [1 ,2 ]
Liu, Jianhong [1 ,2 ]
Zhang, Qianling [1 ]
机构
[1] Shenzhen Univ, Coll Chem & Environm Engn, Graphene Composite Res Ctr, Shenzhen 518060, Peoples R China
[2] Shenzhen Eigen Equat Graphene Technol Co Ltd, Shenzhen 518000, Peoples R China
[3] Grahope New Mat Technol Inc, Shenzhen 518000, Peoples R China
关键词
Core-shell structure; Layered double hydroxide; ZIF-67; Synergetic effect; Oxygen evolution reaction; ARRAYS; ELECTROCATALYST;
D O I
10.1016/j.jallcom.2021.161805
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
A novel core-shell structure of Co/N-doped carbon polyhedron@NiCo layered double hydroxides (Co/NCP@ NiCo-LDHs) was designed and synthesized. Except for the advantages of core-shell structure of the electronic redistribution at the heterostructure and exposure of numerous active sites, metallic Co encapsulated into NCP was proved to be crucial to fine-tune the electronic transfer between NCP and NiCo-LDHs. The above merits rendered Co/NCP@NiCo-LDHs with improved oxygen evolution reaction (OER) activity with a low overpotential of 277 mV at 10 mA cm-2 in 1 M KOH solution, which is much better than the Co/NCP, NiCo-LDHs and NCP@NiCo-LDHs, and showed quite high durability. This strategy is demonstrated to be a reliable approach for improving the catalytic efficiency of LDHs catalysts. (c) 2021 Elsevier B.V. All rights reserved.
引用
收藏
页数:8
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