Atomic Plane-Vacancy Engineering of Transition-Metal Dichalcogenides with Enhanced Hydrogen Evolution Capability

Cong Wei; Wenzhuo Wu; Hao Li; Xiangcheng Lin; Tong Wu; Yida Zhang; Quan Xu; Lipeng Zhang; Yonghao Zhu; Xinan Yang; Zheng Liu; Qun Xu

doi:10.1021/acsami.9b07856

Atomic Plane-Vacancy Engineering of Transition-Metal Dichalcogenides with Enhanced Hydrogen Evolution Capability

Cong Wei, Wenzhuo Wu, Hao Li, Xiangcheng Lin, Tong Wu, Yida Zhang, Quan Xu^*, Lipeng Zhang, Yonghao Zhu, Xinan Yang, Zheng Liu, Qun Xu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

57 Citations (Scopus)

Abstract

Introducing anion vacancies on two-dimensional transition-metal dichalcogenides (TMDs) would significantly improve their catalytic activity. In this work, we proposed a solid-phase reduction (SPR) strategy to simultaneously achieve efficient exfoliation and controlled generation of chalcogen vacancies on TMDs. Consecutive sulfur vacancies were successfully created on the basal plane of the bulk MoS₂ and WS₂, and their interlamellar distances were distinctly expanded after the SPR treatment (about 16%), which can be conveniently exfoliated by only gentle shaking. The S-vacancy significantly increases the hydrogen-evolution reaction activity of the MoS₂ and WS₂ nanosheets, with overpotential of -238 and -241 mV at 10 mA cm^-2, respectively. We anticipate that our SPR strategy will supply a general platform for the development of TMD-based electrocatalysts for industrial water splitting and hydrogen production in the near future.

Original language	English
Pages (from-to)	25264-25270
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	28
DOIs	https://doi.org/10.1021/acsami.9b07856
Publication status	Published - Jun 21 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

ASJC Scopus Subject Areas

General Materials Science

Keywords

hydrogen-evolution reaction
scalable exfoliation
solid-phase reduction
transition-metal dichalcogenides
vacancy engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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abstract = "Introducing anion vacancies on two-dimensional transition-metal dichalcogenides (TMDs) would significantly improve their catalytic activity. In this work, we proposed a solid-phase reduction (SPR) strategy to simultaneously achieve efficient exfoliation and controlled generation of chalcogen vacancies on TMDs. Consecutive sulfur vacancies were successfully created on the basal plane of the bulk MoS2 and WS2, and their interlamellar distances were distinctly expanded after the SPR treatment (about 16%), which can be conveniently exfoliated by only gentle shaking. The S-vacancy significantly increases the hydrogen-evolution reaction activity of the MoS2 and WS2 nanosheets, with overpotential of -238 and -241 mV at 10 mA cm-2, respectively. We anticipate that our SPR strategy will supply a general platform for the development of TMD-based electrocatalysts for industrial water splitting and hydrogen production in the near future.",

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AU - Wei, Cong

AU - Wu, Wenzhuo

AU - Li, Hao

AU - Lin, Xiangcheng

AU - Wu, Tong

AU - Zhang, Yida

AU - Xu, Quan

AU - Zhang, Lipeng

AU - Zhu, Yonghao

AU - Yang, Xinan

AU - Liu, Zheng

AU - Xu, Qun

PY - 2019/6/21

Y1 - 2019/6/21

N2 - Introducing anion vacancies on two-dimensional transition-metal dichalcogenides (TMDs) would significantly improve their catalytic activity. In this work, we proposed a solid-phase reduction (SPR) strategy to simultaneously achieve efficient exfoliation and controlled generation of chalcogen vacancies on TMDs. Consecutive sulfur vacancies were successfully created on the basal plane of the bulk MoS2 and WS2, and their interlamellar distances were distinctly expanded after the SPR treatment (about 16%), which can be conveniently exfoliated by only gentle shaking. The S-vacancy significantly increases the hydrogen-evolution reaction activity of the MoS2 and WS2 nanosheets, with overpotential of -238 and -241 mV at 10 mA cm-2, respectively. We anticipate that our SPR strategy will supply a general platform for the development of TMD-based electrocatalysts for industrial water splitting and hydrogen production in the near future.

AB - Introducing anion vacancies on two-dimensional transition-metal dichalcogenides (TMDs) would significantly improve their catalytic activity. In this work, we proposed a solid-phase reduction (SPR) strategy to simultaneously achieve efficient exfoliation and controlled generation of chalcogen vacancies on TMDs. Consecutive sulfur vacancies were successfully created on the basal plane of the bulk MoS2 and WS2, and their interlamellar distances were distinctly expanded after the SPR treatment (about 16%), which can be conveniently exfoliated by only gentle shaking. The S-vacancy significantly increases the hydrogen-evolution reaction activity of the MoS2 and WS2 nanosheets, with overpotential of -238 and -241 mV at 10 mA cm-2, respectively. We anticipate that our SPR strategy will supply a general platform for the development of TMD-based electrocatalysts for industrial water splitting and hydrogen production in the near future.

KW - hydrogen-evolution reaction

KW - scalable exfoliation

KW - solid-phase reduction

KW - transition-metal dichalcogenides

KW - vacancy engineering

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ER -

Atomic Plane-Vacancy Engineering of Transition-Metal Dichalcogenides with Enhanced Hydrogen Evolution Capability

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

UN SDGs

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