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Nano Research 2023, 16(4): 5929-5937 https://doi.org/10.1007/s12274-022-5176-7
Research Article | Issue | Published: 12 November 2022

0D–2D Schottky heterostructure coupling of FeS nanosheets and Co9S8 nanoparticles for long-term industrial-level water oxidation

Show Author's Information Hai-Jun Liu,  Ning Yu,  Xiao-Qing Yuan,  Hui-Ying Zhao,  Xin-Yu Zhang,  Yong-Ming Chai( ),  Bin Dong( )
State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
Keywords:
oxygen evolution reaction, Schottky heterostructure, strong electronic coupling, electron rearrangement, operando Raman
Topics:
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Liu H-J, Yu N, Yuan X-Q, et al. 0D–2D Schottky heterostructure coupling of FeS nanosheets and Co9S8 nanoparticles for long-term industrial-level water oxidation. Nano Research, 2023, 16(4): 5929-5937. https://doi.org/10.1007/s12274-022-5176-7
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Abstract Full text Electronic supplementary material About this article

The effective electron and interface/structural coupling for heterostructure electrocatalyst is the key to regulating the intrinsic activity and stability for oxygen evolution reaction (OER). Herein, a facile strategy is developed to fabricate well-dispersed zero-dimensional (0D) metallic Co9S8 nanoparticles on two-dimensional (2D) FeS nanosheets, forming FeS-Co9S8 Schottky heterostructures with abundant heterointerfaces as OER electrocatalyst. The strong electronic coupling between FeS and Co9S8 expedites electrons flow from Fe atoms in FeS nanosheets to Co atoms in tetrahedron sites (CoTd), thereby leading to the structural integrity of the heterostructure and the constant exposure of active sites. Operando Raman spectroscopy also indicates the Co sites in the FeS-Co9S8 Schottky heterostructure are OER active sites. Therefore, FeS-Co9S8 heterostructure supported by iron foam (FeS-Co9S8/IF) shows the remarkable activity and durability, achieving an industrial-level 500 mA·cm−2 current density at an overpotential of only 332 mV and maintaining for 100 h. This work demonstrates that constructing Schottky heterostructure interface with strong coupling effect may be a good strategy for excellent catalytic performances.


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About this article

0D–2D Schottky heterostructure coupling of FeS nanosheets and Co9S8 nanoparticles for long-term industrial-level water oxidation

Show Author's information Hai-Jun Liu, Ning Yu, Xiao-Qing Yuan, Hui-Ying Zhao, Xin-Yu Zhang, Yong-Ming Chai( ), Bin Dong( )
State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China

Abstract

The effective electron and interface/structural coupling for heterostructure electrocatalyst is the key to regulating the intrinsic activity and stability for oxygen evolution reaction (OER). Herein, a facile strategy is developed to fabricate well-dispersed zero-dimensional (0D) metallic Co9S8 nanoparticles on two-dimensional (2D) FeS nanosheets, forming FeS-Co9S8 Schottky heterostructures with abundant heterointerfaces as OER electrocatalyst. The strong electronic coupling between FeS and Co9S8 expedites electrons flow from Fe atoms in FeS nanosheets to Co atoms in tetrahedron sites (CoTd), thereby leading to the structural integrity of the heterostructure and the constant exposure of active sites. Operando Raman spectroscopy also indicates the Co sites in the FeS-Co9S8 Schottky heterostructure are OER active sites. Therefore, FeS-Co9S8 heterostructure supported by iron foam (FeS-Co9S8/IF) shows the remarkable activity and durability, achieving an industrial-level 500 mA·cm−2 current density at an overpotential of only 332 mV and maintaining for 100 h. This work demonstrates that constructing Schottky heterostructure interface with strong coupling effect may be a good strategy for excellent catalytic performances.

Keywords: oxygen evolution reaction, Schottky heterostructure, strong electronic coupling, electron rearrangement, operando Raman

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Publication history
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Acknowledgements

Publication history

Received: 01 August 2022
Revised: 09 October 2022
Accepted: 10 October 2022
Published: 12 November 2022
Issue date: April 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 52274308 and 52174283) and Postgraduate Innovation Engineering Project of China University of Petroleum (East China) (No. YCX2021134).

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