An electrochemical anodization strategy towards high-activity porous MoS2 electrodes for the hydrogen evolution reaction

Xuerui Mao; Tianliang Xiao; Qianqian Zhang; Zhaoyue Liu

doi:10.1039/C8RA01554F

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An electrochemical anodization strategy towards high-activity porous MoS₂ electrodes for the hydrogen evolution reaction†

Xuerui Mao,^a Tianliang Xiao,^a Qianqian Zhang^b and Zhaoyue Liu

*^a

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* Corresponding authors

^a Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P. R. China
E-mail: liuzy@buaa.edu.cn
Tel: +86-10-82317801

^b Key Laboratory of Micro-nano Measurement, Manipulation and Physics of Ministry of Education, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, P. R. China

Abstract

Molybdenum disulfide (MoS₂) is a promising non-precious metal electrocatalyst for the hydrogen evolution reaction (HER). Herein, we have described an anodization route for the fabrication of porous MoS₂ electrodes. The active porous MoS₂ layer was directly formed on the surface of a Mo metal sheet when it was subjected to anodization in a sulfide-containing electrolyte. The Mo sheet served as both a supporter for MoS₂ electrocatalysts and a conductive substrate for electron transport. After optimizing the anodization parameters, the anodized MoS₂ electrode showed a high electrocatalytic activity with an onset potential of −0.18 V (vs. RHE) for the HER, a Tafel slope of ∼101 mV per decade and an overpotential of 0.23 V at a current density of 10 mA cm⁻² for the HER. These results indicate that our facile anodization strategy is an efficient route towards a high-activity MoS₂ electrode.

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Article information

DOI: https://doi.org/10.1039/C8RA01554F
Article type: Paper
Submitted: 21 Feb 2018
Accepted: 12 Apr 2018
First published: 23 Apr 2018
This article is Open Access

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RSC Adv., 2018,8, 15030-15035

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An electrochemical anodization strategy towards high-activity porous MoS₂ electrodes for the hydrogen evolution reaction

X. Mao, T. Xiao, Q. Zhang and Z. Liu, RSC Adv., 2018, 8, 15030 DOI: 10.1039/C8RA01554F

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