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

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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.

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

Authors and Affiliations

  1. State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, 430073, China

    Xin Yu, Jing Mei, Xing Wang & Qi Wu

  2. Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China

    Xin Yu, Jing Mei, Yeshuang Du & Qi Wu

  3. Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, 441053, China

    Xiaohong Cheng

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  1. Xin Yu
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  2. Jing Mei
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  3. Yeshuang Du
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  4. Xiaohong Cheng
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  5. Xing Wang
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  6. Qi Wu
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Corresponding authors

Correspondence to Xiaohong Cheng, Xing Wang or Qi Wu.

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12274_2023_5740_MOESM1_ESM.pdf

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

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Yu, X., Mei, J., Du, Y. et al. Engineered interface of three-dimensional coralliform NiS/FeS2 heterostructures for robust electrocatalytic water cleavage. Nano Res. 17, 4693–4701 (2024). https://doi.org/10.1007/s12274-023-5740-9

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  • DOI: https://doi.org/10.1007/s12274-023-5740-9

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