In situ construction of heterostructured CuxO@NiCoS nanoarrays for alkaline overall water splitting

被引:2
|
作者
Song, Chenyu [1 ]
Yang, Jishuang [1 ]
Ayappan, Chinnadurai [1 ]
Yang, Haitang [3 ]
Xing, Ruimin [1 ]
Liu, Shanhu [2 ]
机构
[1] Henan Univ, Sch Energy Sci & Technol, Henan Key Lab Polyoxometalate Chem, Zhengzhou 450046, Peoples R China
[2] Henan Univ, Coll Chem & Mol Sci, Kaifeng 475004, Peoples R China
[3] Xuchang Univ, Food & Pharm Coll, Xuchang 461000, Peoples R China
基金
中国国家自然科学基金;
关键词
ELECTROCATALYST; EFFICIENT; CARBON;
D O I
10.1039/d3se01194a
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
Hierarchical hybrid heterostructures are promising for efficient and sustainable electrocatalysts due to their various morphologies and outstanding electrochemical properties. Herein, heterostructured CuxO@NiCoS nanoarrays were in situ constructed on copper foam (denoted as CuxO@NiCoS/CF) and used as electrocatalysts for alkaline overall water splitting. Benefiting from the hierarchical hybrid heterostructure that exposes abundant active sites and the synergistic effect between CuxO and NiCoS, CuxO@NiCoS/CF shows better electrocatalytic performance than single-component electrocatalysts (CuxO/CF and NiCoS/CF). The influence of the initial metal source ratio (Ni/Co) during the electrodeposition on electrocatalytic performance was further investigated. Impressively, the optimized CuxO@NiCoS-1/CF exhibits a small overpotential of 110 mV at 10 mA cm(-2) for the hydrogen evolution reaction (HER) and 313 mV at 30 mA cm(-2) for the oxygen evolution reaction (OER). Moreover, CuxO@NiCoS-1/CF as bifunctional electrocatalysts reach a current density of 30 mA cm(-2) at a low cell voltage of 1.79 V and display remarkable electrocatalytic durability in an alkaline solution. This work can provide a new idea for designing and preparing novel non-noble metal electrocatalysts with the benefit of structural diversity.
引用
收藏
页码:302 / 309
页数:8
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