MoS2/NiS core-shell structures for improved electrocatalytic process of hydrogen evolution

JOURNAL OF POWER SOURCES

卷:472

Article

Jiang, Haishun¹  Zhang, Kenan¹  Li, Wenyao^1,2  Cui, Zhe³  He, Shu-Ang³  Zhao, Siyu²  Li, Jun¹  He, Guanjie^2,4  Shearing, Paul R.²  Brett, Dan J. L.² 

[1] Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China

[2] UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England

[3] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Coll Mat Sci & Engn, Shanghai 201620, Peoples R China

[4] Univ Lincoln, Sch Chem, Joseph Banks Labs, Lincoln LN6 7DL, England

关键词: MoS2/NiS;    Hierarchical nanostructures;    One-step hydrothermal reaction;    Hydrogen evolution reaction;   

DOI  :  10.1016/j.jpowsour.2020.228497

来源: Elsevier

【 摘 要 】

It is important to develop a low-cost and easy-prepared electrocatalyst for hydrogen evolution reaction. In this work, MoS2/NiS hierarchical nanostructures (HHs) were fabricated on Ni foam by a simple one-step hydrothermal reaction using Ni foam as raw materials directly. Owing to the unique synthetic strategy that provide uniform MoS2/NiS HHs structure on the porous Ni foam, generate abundant active surfaces, small resistance, furthermore it is beneficial for carrier migration and contributing to a large number of active sites. Excellent electrocatalytic performances are obtained such as an overpotential of only similar to 84.1 mV to reach the current density of 10 mA cm(-2), a Tafel slope of 76.9 mV dec(-1) and a small inherent resistance of 6.33 Omega. More importantly, a quick current response under multistep potentials is realized and an excellent stability retained after 3000 cycles of CV test. Besides, a DC power to supply a device (MnMoO4//MoS2/NiS HHs B) under 1.6 V can generate a current density of 21 mA cm(-2), demonstrating its practical application.

【 授权许可】

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