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Defect engineering is one of the effective strategies to optimize the physical and chemical properties of molybdenum disulfide (MoS2) to improve catalytic hydrogen evolution reaction (HER) performance. Dislocations, as a typical defect structure, are worthy of further investigation due to the versatility and sophistication of structures and the influence of local strain effects on the catalytic performance. Herein, this study adopted a low-temperature hydrothermal synthesis strategy to introduce numerous dislocation-strained structures into the in-plane and out-of-plane of MoS2 nanosheets. Superior HER catalytic activity of 5.85 mmol·g−1·h−1 under visible light was achieved based on the high-density dislocations and the corresponding strain field. This work paves a new pathway for improving the catalytic activity of MoS2 via a dislocation-strained synergistic modulation strategy.


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Dislocation-strained MoS2 nanosheets for high-efficiency hydrogen evolution reaction

Show Author's information Shihao Wang1,§Longlu Wang1,§( )Lingbin Xie2Weiwei Zhao2Xia Liu3( )Zechao Zhuang4YanLing Zhuang1Jing Chen1Shujuan Liu2Qiang Zhao1,2( )
College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) and Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
Department of Chemistry, Tsinghua University, Beijing 100084, China

§ Shihao Wang and Longlu Wang contributed equally to this work.

Abstract

Defect engineering is one of the effective strategies to optimize the physical and chemical properties of molybdenum disulfide (MoS2) to improve catalytic hydrogen evolution reaction (HER) performance. Dislocations, as a typical defect structure, are worthy of further investigation due to the versatility and sophistication of structures and the influence of local strain effects on the catalytic performance. Herein, this study adopted a low-temperature hydrothermal synthesis strategy to introduce numerous dislocation-strained structures into the in-plane and out-of-plane of MoS2 nanosheets. Superior HER catalytic activity of 5.85 mmol·g−1·h−1 under visible light was achieved based on the high-density dislocations and the corresponding strain field. This work paves a new pathway for improving the catalytic activity of MoS2 via a dislocation-strained synergistic modulation strategy.

Keywords: molybdenum disulfide, dislocation, strain, hydrogen evolution reaction

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Publication history
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Acknowledgements

Publication history

Received: 19 December 2021
Revised: 12 January 2022
Accepted: 13 January 2022
Published: 10 March 2022
Issue date: April 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was financially supported by the National Funds for Distinguished Young Scientists (No. 61825503), the National Natural Science Foundation of China (Nos. 51902101, 61775101, and 61804082), the Youth Natural Science Foundation of Hunan Province (No. 2021JJ40044), the Natural Science Foundation of Jiangsu Province (No. BK20201381), and the Science Foundation of Nanjing University of Posts and Telecommunications (No. NY219144).

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