Hierarchical MoS2/Ni3S2 core-shell nanofibers for highly efficient and stable overall-water-splitting in alkaline media

被引：20
作者：
Wang, Faze [1 ,2 ]
Wu, Hao [1 ]
Sun, Hong [1 ]
Ma, Li [4 ]
Shen, Wenzhong [1 ]
Li, Yanbo [2 ]
Zheng, Maojun [1 ,3 ]
机构：
[1] Shanghai Jiao Tong Univ, Key Lab Artificial Struct & Quantum Control, Minist Educ, Dept Phys & Astron, Shanghai 200240, Peoples R China
[2] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China
[3] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[4] Shanghai Jiao Tong Univ, Sch Chem & Chem Technol, Shanghai 200240, Peoples R China
来源：
MATERIALS TODAY ENERGY | 2018年 / 10卷
关键词：
Molybdenum disulfide; Ammonium intercalation; Earth abundant catalyst; Hydrogen evolution reaction; Overall water splitting; ACTIVE EDGE SITES; HYDROGEN EVOLUTION CATALYSIS; MOS2 ULTRATHIN NANOSHEETS; MOLYBDENUM SULFIDES; PERFORMANCE; GRAPHENE; NANOPARTICLES; STORAGE; SURFACE; GROWTH;
D O I：
10.1016/j.mtener.2018.09.004
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：
Non-noble metal electrocatalysts replacing Pt catalyst for efficient hydrogen-evolution reaction (HER) are highly desired to achieve sustainable production of H-2 through water splitting. In this paper, we report a novel ammonium intercalated MoS2/Ni3S2 core-shell nanofibers on graphene-Ni foam by a facile method. Such hierarchical nanostructures provide abundant active sites for hydrogen evolution. Furthermore, DFT calculation demonstrates that the intercalated ammonium ions improve the chemisorption of protons for MoS2, thus further enhancing HER activity. The synthesized MoS2/Ni3S2 nanofiber cathode exhibits an overpotential of 109 mV at 10 mA cm(-2) in 1 M KOH electrolyte - the lowest overpotential reported so far among any earth-abundant cathodes working in strong alkaline condition. Combining with a nickel iron layered double hydroxide anode, stable overall water splitting with a low potential of 1.59 V at 10 mA cm(-2) is achieved in 1 M KOH for 100 h. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：214 / 221
页数：8
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