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

He, Guanjie (2020) MoS2/NiS core-shell structures for improved electrocatalytic process of hydrogen evolution. Journal of Power Resources, 472 . p. 228497. ISSN 0378-7753

Full content URL: https://doi.org/10.1016/j.jpowsour.2020.228497

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

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 ~ 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 Ω. 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.

Keywords:MoS2/NiS; Hierarchical nanostructures; One-step hydrothermal reaction; Hydrogen evolution reaction
Subjects:F Physical Sciences > F200 Materials Science
Divisions:College of Science > School of Chemistry
ID Code:41464
Deposited On:16 Jul 2020 13:15

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