Facile Electrodeposition of Amorphous Nickel/Nickel Sulfide Composite Films for High-Efficiency Hydrogen Evolution Reaction

被引:34
|
作者
Miao, Chengcheng [1 ]
Zheng, Xingwen [1 ]
Sun, Jiamin [1 ]
Wang, Hang [2 ]
Qiao, Jie [1 ]
Han, Ning [2 ]
Wang, Shanpeng [1 ]
Gao, Wei [3 ,4 ]
Liu, Xiaohui [1 ]
Yang, Zai-xing [1 ]
机构
[1] Shandong Univ, Sch Phys, Sch Microelect, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[2] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
[3] Northwestern Polytech Univ, Ctr Nano Energy Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[4] Northwestern Polytech Univ, Shaanxi Joint Lab Graphene NPU, Xian 710072, Peoples R China
基金
中国国家自然科学基金;
关键词
electrocatalyst; amorphous films; electrodeposition; Ni-based materials; hydrogen evolution reaction;
D O I
10.1021/acsaem.0c02863
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
Low-cost preparation of high-efficiency electrocatalysts is challenging the development of electrocatalytic water splitting. Here, amorphous nickel/nickel sulfide composite films with controlled Ni content are prepared directly on nickel foam by adopting the reductant during a facile electrodeposition route, functioning as active hydrogen evolution electrocatalysts. By adopting the reductant during the electrodeposition process, the content of Ni increases in the as-prepared nickel/nickel sulfide composite film, deducing from an energy-dispersive spectrometer. As a result of increased Ni to the optimal ratio, the amorphous nickel/nickel sulfide composite film exhibits remarkable electrocatalytic performance, benefiting possibly the modulated electronic structure, the reduced charge resistance, and the higher effectively electrochemical surface area. In a word, the optimal electrocatalyst presents an excellent catalytic stability and exhibits a small Tafel slope of 79.9 mV.dec(-1) and low overpotentials of 43.8 and 134.5 mV to deliver current densities of 10 and 100 mA.cm(-2), respectively. The low-cost preparation of the high-efficiency amorphous nickel/nickel sulfide composite film here suggests that the adopted facile electrodeposition method may provide a feasible route for the fabrication of next-generation high-efficiency electrocatalysts for practical applications.
引用
收藏
页码:927 / 933
页数:7
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