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Stable and Aligned Metallic MoS2 on Plasma Treated Mass Transfer Channels for Hydrogen Evolution Reaction

Abstract

Ultrathin molybdenum disulfide (MoS2) nanosheets have attracted intensive attention due to their catalytic properties. However, most of existing MoS2 nanosheets show poor electronic conductivity and a limited amount of active sites. Meanwhile, these nanosheets tend to restack severely due to van der Waals force causing a reduction in the density of active sites. Inspired by nature, for the first time, we vertically grow 1T metallic MoS2 on well-aligned, freestanding, 1000 μm long channels from carbonized wood to maximize the exposition of active catalytic sites and increase the electrolyte and hydrogen transport through the well-aligned channels using a scalable approach. Furthermore, the carbonized wood surface is plasma treated to assist the dissipation of generated hydrogen, thus reducing the proton transport barrier at the electrode surface. The vertically grown 1T metallic MoS2 on thoroughly aligned long carbonized wood channels exhibits remarkable catalytic activity with an operating overpotential of 128 mV at a current density of 10 mA‧cm-2. This work provides a new approach for 1T metallic MoS2 synthesis and an interesting configuration to optimize and maintain the catalytic active sites and dissipate the hydrogen on time by in-situ vertically grown catalyst on well-aligned channels made in nature.

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Publication details

The article was received on 22 Sep 2017, accepted on 10 Nov 2017 and first published on 10 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA08400E
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Stable and Aligned Metallic MoS2 on Plasma Treated Mass Transfer Channels for Hydrogen Evolution Reaction

    L. Yang, A. Mukhopadhyay, Y. Jiao, J. Hamel, M. Benamara, Y. Xing and H. Zhu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA08400E

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