Two-dimensional metallic MoS2-amorphous CoNi(OH)2 nanocomposite for enhanced electrochemical water splitting in alkaline solutions

Ying Zhang; Lixun Xue; Chenbin Liang; Yizhuang Chen; Junjie Liu; Chuang Shen; Qi Li; Yefan Duan; Liyuan Yao; Hao Zhang; Yongqing Cai; Chaoliang Tan; Zhimin Luo

doi:10.1016/j.apsusc.2021.150079

Author(s)

Ying Zhang
Lixun Xue
Chenbin Liang
Yizhuang Chen
Junjie Liu
Chuang Shen
Qi Li
Yefan Duan
Liyuan Yao
Hao Zhang
Yongqing Cai
Zhimin Luo

Related Research Unit(s)

Department of Electrical Engineering

Detail(s)

Original language	English
Article number	150079
Journal / Publication	Applied Surface Science
Volume	561
Online published	14 May 2021
Publication status	Published - 30 Sept 2021

Link(s)

DOI	DOI https://doi.org/10.1016/j.apsusc.2021.150079 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85107267523&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(59cea562-2535-462c-8c32-0ead57e82974).html

Abstract

We report the preparation of nanocomposite consisting of metallic MoS₂ and electrodeposited amorphous CoNi(OH)₂ nanosheets on carbon paper for efficient electrochemical water splitting in the alkaline solutions. The synergistic effect between metallic MoS₂ and amorphous CoNi(OH)₂ nanosheets enables the excellent catalytic activity of nanocompsite towards hydrogen evolution reaction (HER) in 0.1 M KOH with a low overpotential of 178 mV at a current density of 10 mA/cm² and Tafel slope of 60.9 mV/decade. The current density of MoS₂-CoNi(OH)₂ nanocomposite for HER at the overpotential of more than 0.190 V is even higher than that of the commercial Pt/C catalyst. Moreover, the MoS₂-CoNi(OH)₂ nanocomposite is also active towards electrochemical oxygen evolution and can act as a bifunctional catalyst for water splitting in 0.1 M KOH. Our work povides a simple and effective way to engineer phases and prepare two-dimensional nanocomposites for effecient water splitting in alkaline aqueous solutions.

Research Area(s)

Alkaline water splitting, Amorphous CoNi(OH)2, Hydrogen evolution, Metallic MoS2, Synergistic effect

SDG 7 - Affordable and Clean Energy

Citation Format(s)

[ RIS ] [ BibTeX ]

Two-dimensional metallic MoS₂-amorphous CoNi(OH)₂ nanocomposite for enhanced electrochemical water splitting in alkaline solutions. / Zhang, Ying; Xue, Lixun; Liang, Chenbin et al.
In: Applied Surface Science, Vol. 561, 150079, 30.09.2021.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Zhang, Y, Xue, L, Liang, C, Chen, Y, Liu, J, Shen, C, Li, Q, Duan, Y, Yao, L, Zhang, H, Cai, Y, Tan, C & Luo, Z 2021, 'Two-dimensional metallic MoS₂-amorphous CoNi(OH)₂ nanocomposite for enhanced electrochemical water splitting in alkaline solutions', Applied Surface Science, vol. 561, 150079. https://doi.org/10.1016/j.apsusc.2021.150079

Zhang, Y., Xue, L., Liang, C., Chen, Y., Liu, J., Shen, C., Li, Q., Duan, Y., Yao, L., Zhang, H., Cai, Y., Tan, C., & Luo, Z. (2021). Two-dimensional metallic MoS₂-amorphous CoNi(OH)₂ nanocomposite for enhanced electrochemical water splitting in alkaline solutions. Applied Surface Science, 561, Article 150079. https://doi.org/10.1016/j.apsusc.2021.150079

Zhang Y, Xue L, Liang C, Chen Y, Liu J, Shen C et al. Two-dimensional metallic MoS₂-amorphous CoNi(OH)₂ nanocomposite for enhanced electrochemical water splitting in alkaline solutions. Applied Surface Science. 2021 Sept 30;561:150079. Epub 2021 May 14. doi: 10.1016/j.apsusc.2021.150079

Zhang, Ying ; Xue, Lixun ; Liang, Chenbin et al. / Two-dimensional metallic MoS₂-amorphous CoNi(OH)₂ nanocomposite for enhanced electrochemical water splitting in alkaline solutions. In: Applied Surface Science. 2021 ; Vol. 561.