Exfoliated MoS₂ with porous graphene nanosheets for enhanced electrochemical hydrogen evolution
Date
2018
Authors
Liu, Y.
Liu, J.
Li, Z.
Fan, X.
Li, Y.
Zhang, F.
Zhang, G.
Peng, W.
Wang, S.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
International Journal of Hydrogen Energy, 2018; 43(30):13946-13952
Statement of Responsibility
Yizhe Liu, Jiapeng Liu, Zhen Li, Xiaobin Fan, Yang Li, Fengbao Zhang, Guoliang Zhang, Wenchao Peng, Shaobin Wang
Conference Name
Abstract
Porous graphene (P-rGO) was synthesized from graphene oxide (GO) via a one-pot calcination method with CO<inf>2</inf> as an activation agent at 800 °C. Due to the special porous structure, the surface area of P-rGO can be increased to ∼759 m<sup>2</sup>/g. The P-rGO was then used as a support to incorporate with chemical exfoliated molybdenum disulfide (MoS<inf>2</inf>) for the fabrication of MoS<inf>2</inf>/P-rGO composite. Compared to bulk MoS<inf>2</inf>, the exfoliated MoS<inf>2</inf> is in the 1T phase with a metallic property and smaller charge transfer resistance, thus has a better activity in electrochemical hydrogen evolution reaction (HER). The HER activity of 1T MoS<inf>2</inf> could be further increased after the combination with P-rGO. The overpotential of 1T MoS<inf>2</inf>/P-rGO was only ∼130 mV vs. RHE, and the corresponding Tafel slope was ∼75 mV Dec<sup>−1</sup>. The special porous structure and good electric conductivity of P-rGO decrease the charge transfer resistance of the composite without sheltering too many active sites of MoS<inf>2</inf>, thus leading to the enhanced HER activity. As an efficient noble metal free HER catalyst, the 1T MoS<inf>2</inf>/P-rGO has great potential for large-scale hydrogen production.
School/Discipline
Dissertation Note
Provenance
Description
Available online 2 March 2018
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Rights
© 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.