Amorphous MoSxCly electrocatalyst supported by vertical graphene for efficient electrochemical and photoelectrochemical hydrogen generation

Xingwang Zhang; Fei Meng; Shun Mao; Qi Ding; Melinda J. Shearer; Matthew S. Faber; Junhong Chen; Robert J. Hamers; Song Jin

doi:10.1039/C4EE03240C

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Amorphous MoS_xCl_y electrocatalyst supported by vertical graphene for efficient electrochemical and photoelectrochemical hydrogen generation†

Xingwang Zhang,^ab Fei Meng,^a Shun Mao,^c Qi Ding,^a Melinda J. Shearer,^a Matthew S. Faber,^a Junhong Chen,^c Robert J. Hamers^a and Song Jin*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA
E-mail: jin@chem.wisc.edu

^b Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310027, China

^c Department of Mechanical Engineering, University of Wisconsin—Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211, USA

Abstract

We report amorphous MoS_xCl_y as a high-performance electrocatalyst for both electrochemical and photoelectrochemical hydrogen generation. This novel ternary electrocatalyst is synthesized via chemical vapour deposition at temperatures lower than those typically used to grow crystalline MoS₂ nanostructures and structurally characterized. The MoS_xCl_y electrocatalysts exhibit stable and high catalytic activity toward the hydrogen evolution reaction, as evidenced by large cathodic current densities at low overpotentials and low Tafel slopes (ca. 50 mV decade⁻¹). The electrocatalytic performance can be further enhanced through depositing MoS_xCl_y on conducting vertical graphenes. Furthermore, MoS_xCl_y can be directly deposited on p-type silicon photocathodes to enable efficient photoelectrochemical hydrogen evolution.

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Article information

DOI: https://doi.org/10.1039/C4EE03240C
Article type: Communication
Submitted: 12 Oct 2014
Accepted: 07 Jan 2015
First published: 07 Jan 2015
This article is Open Access

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Energy Environ. Sci., 2015,8, 862-868

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Amorphous MoS_xCl_y electrocatalyst supported by vertical graphene for efficient electrochemical and photoelectrochemical hydrogen generation

X. Zhang, F. Meng, S. Mao, Q. Ding, M. J. Shearer, M. S. Faber, J. Chen, R. J. Hamers and S. Jin, Energy Environ. Sci., 2015, 8, 862 DOI: 10.1039/C4EE03240C

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