NiSe-modified CoMoO4 nanosheets as bifunctional electrocatalysts for hydrogen and oxygen evolution reactions

被引:18
作者
Jiang, Menghe [1 ,2 ]
Hu, Zhicong [1 ,2 ]
Zou, Yongjin [1 ,2 ]
Xiang, Cuili [1 ,2 ]
Xu, Fen [1 ,2 ]
Sun, Lixian [1 ,2 ]
Hu, Xuebu [3 ]
机构
[1] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
[2] Guangxi Collaborat Innovat Ctr Struct & Property N, Guilin 541004, Peoples R China
[3] Chongqing Univ Technol, Coll Chem & Chem Engn, Chongqing 400054, Peoples R China
关键词
Self-supporting substrate; Electrodeposition; Hydrogen evolution reaction; Oxygen evolution reaction; EFFICIENT; ELECTRODE;
D O I
10.1016/j.jallcom.2024.173495
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
Selecting self-supporting substrates with large specific surface areas is an effective strategy to avoid the agglomeration of nanomaterials and improve the structural stability of materials while increasing their electrical conductivity. In this study, CoMoO4 nanosheet structures were first grown on a nickel foam (NF) substrate by hydrothermal and calcination processes. Then, NiSe nanoparticles were deposited on NF/CoMoO4 by a constant potential method to construct NF/CoMoO4 @NiSe nanosheet electrode materials with graded layered structures. This nanosheet structure grown on NF substrates provided enough space for mass transfer and fully exposed the electrochemical active sites. Meanwhile, the self-supported electrode reduced the indirect contact resistance between the electrocatalyst and the substrate, which promoted the timely release of generated bubbles from the electrode. The NF/CoMoO4 @NiSe electrode exhibited excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalytic activities under alkaline conditions. Overpotentials of only 58 mV and 184 mV were needed to achieve a current density of 10 mA center dot cm(-2) for the HER and OER, respectively. This study presents new ideas for the construction of nanosheet structures and the design of efficient HER and OER bifunctional electrocatalysts using transition metal selenides.
引用
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页数:10
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