Jiang, H; Zhang, K; Li, W; Cui, Z; He, S-A; Zhao, S; Li, J; ... Brett, DJL; + view all Jiang, H; Zhang, K; Li, W; Cui, Z; He, S-A; Zhao, S; Li, J; He, G; Shearing, PR; Brett, DJL; - view fewer (2020) MoS₂/NiS core-shell structures for improved electrocatalytic process of hydrogen evolution. Journal of Power Sources , 472 , Article 228497. 10.1016/j.jpowsour.2020.228497.

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Abstract

It is important to develop a low-cost and easy-prepared electrocatalyst for hydrogen evolution reaction. In this work, MoS_{2}/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 MoS_{2}/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 (MnMoO_{4}//MoS_{2}/NiS HHs B) under 1.6 V can generate a current density of 21 mA cm^{-2}, demonstrating its practical application.

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