DataVXACS Applied Materials & InterfacesPaper
journal article·2019-07-17

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

ACS Applied Materials & Interfaces· Volume 11· Issue 28
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Source abstract

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.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: 2D Materials and Applications · Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

State Key Laboratory of Petroleum Resources and Prospecting, Harvard SEAS-CUPB Joint Laboratory on Petroleum Science, 29 Oxford Street, Cambridge, Massachusetts 02138, United States

College of Engineering, Beijing University of Chemical Technology, Beijing 100029, China

National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore

Funding

Zhengzhou Municipal Science and Technology Bureau · National Natural Science Foundation of China · Henan Province

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