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Nano Research 2024, 17(6): 4693-4701 https://doi.org/10.1007/s12274-023-5740-9
Research Article | Issue | Published: 05 August 2023

Engineered interface of three-dimensional coralliform NiS/FeS2 heterostructures for robust electrocatalytic water cleavage

Show Author's Information Xin Yu1,2,§,  Jing Mei1,2,§,  Yeshuang Du2,  Xiaohong Cheng3( ),  Xing Wang1( ),  Qi Wu1,2( )
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, China
Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 441053, China

§ Xin Yu and Jing Mei contributed equally to this work.

Keywords:
water splitting, nanorods, interface engineering, bifunctional, NiS/FeS2
Topics:
Oxygen evolution reaction
Cite this article:
Yu X, Mei J, Du Y, et al. Engineered interface of three-dimensional coralliform NiS/FeS2 heterostructures for robust electrocatalytic water cleavage. Nano Research, 2024, 17(6): 4693-4701. https://doi.org/10.1007/s12274-023-5740-9
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Abstract Full text Electronic supplementary material About this article

Heterojunction structures improve the intrinsic activity of electrocatalysts by enhancing the charge transfer between the catalyst and the electrode. In this paper, the NiS/FeS2 heterostructured electrocatalyst is fabricated by a simple sulfidation method using an interface engineering strategy to adjust the surface electron density of the electrocatalyst. As expected, NiS/FeS2 electrocatalyst exhibits superior activity and durable oxygen evolution reaction (OER) stability, requiring only a low overpotential of 183 mV to achieve a current density of 10 mA·cm−2 and can be stable for more than 80 h, superior to NiS, FeS2 electrocatalyst individually, and precious RuO2. Notably, NiS/FeS2 is also a good bifunctional electrocatalyst with good overall water splitting performance, and it only requires a voltage 1.56 V to obtain a current density of 10 mA·cm−2 for more than 12 h. Remarkably, the NiS/FeS2 hybridization facilitates the formation of coral-like structures, increasing the electrochemical surface area (ECSA) and enhancing the charge transfer efficiency, thus leading to excellent electrocatalytic performance. This work proposes a constructive strategy for designing efficient electrocatalysts based on interface engineering, and lays a foundation for designing a new class of electrocatalysts.


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Abstract
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Electronic supplementary material
About this article

Engineered interface of three-dimensional coralliform NiS/FeS2 heterostructures for robust electrocatalytic water cleavage

Show Author's information Xin Yu1,2,§, Jing Mei1,2,§, Yeshuang Du2, Xiaohong Cheng3( ), Xing Wang1( ), Qi Wu1,2( )
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, China
Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 441053, China

§ Xin Yu and Jing Mei contributed equally to this work.

Abstract

Heterojunction structures improve the intrinsic activity of electrocatalysts by enhancing the charge transfer between the catalyst and the electrode. In this paper, the NiS/FeS2 heterostructured electrocatalyst is fabricated by a simple sulfidation method using an interface engineering strategy to adjust the surface electron density of the electrocatalyst. As expected, NiS/FeS2 electrocatalyst exhibits superior activity and durable oxygen evolution reaction (OER) stability, requiring only a low overpotential of 183 mV to achieve a current density of 10 mA·cm−2 and can be stable for more than 80 h, superior to NiS, FeS2 electrocatalyst individually, and precious RuO2. Notably, NiS/FeS2 is also a good bifunctional electrocatalyst with good overall water splitting performance, and it only requires a voltage 1.56 V to obtain a current density of 10 mA·cm−2 for more than 12 h. Remarkably, the NiS/FeS2 hybridization facilitates the formation of coral-like structures, increasing the electrochemical surface area (ECSA) and enhancing the charge transfer efficiency, thus leading to excellent electrocatalytic performance. This work proposes a constructive strategy for designing efficient electrocatalysts based on interface engineering, and lays a foundation for designing a new class of electrocatalysts.

Keywords: water splitting, nanorods, interface engineering, bifunctional, NiS/FeS2

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Publication history
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Acknowledgements

Publication history

Received: 10 March 2023
Revised: 12 April 2023
Accepted: 13 April 2023
Published: 05 August 2023
Issue date: June 2024

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 22275052), the Natural Science Foundation of Hubei Province (No. 2019CFB569), and the Science and Technology Foundation for Creative Research Group of Hubei Normal University (No. 2019CZ08). The authors would like to thank Shiyanjia Lab (www.shiyanjia.com) for the TEM test and SCI-Go (www.sci-go.com) for the XPS analysis.

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