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Research Article | Open Access

Interface engineering of Fe-Sn-Co sulfide/oxyhydroxide heterostructural electrocatalyst for synergistic water splitting

Siyu Chen1, Ting Zhang1, Jingyi Han1, Hui Qi2, Shihui Jiao1, Changmin Hou3, Jingqi Guan1 ( )
Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130021, China
The Second Hospital of Jilin University, Changchun 130021, China
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
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Abstract

To realize large-scale hydrogen production by electrolysis of water, it is essential to develop non-precious metal catalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Here, we fabricate Sn-, Fe-, and Co-based sulfide/oxyhydroxide heterostructural catalyst on nickel foam (FeSnCo0.2SxOy/NF) by solvothermal method. The FeSnCo0.2SxOy/NF requires low overpotentials of 48 and 186 mV at 10 mA·cm–2, respectively, for HER and OER. When it is assembled into an electrolytic cell as a bifunctional electrocatalyst, it only needs 1.54 V to reach 10 mA·cm–2, far better than IrO2||Pt/C electrolyzer. The formation of sulfide/hydroxide heterostructural interfaces improves the electron transfer and reduces the reaction energy barrier, thus promoting the electrocatalytic processes.

Graphical Abstract

Sn-, Fe-, and Co-based sulfide/oxyhydroxide heterostructural catalyst on nickel foam (FeSnCo0.2SxOy/NF) has good bifunctional activity with low overpotential (η10) values of 186 and 48 mV for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. In addition, the FeSnCo0.2SxOy||FeSnCo0.2SxOy cell requires only 1.54 V to reach 10 mA·cm−2, which is significantly better than IrO2||Pt/C.

Keywords

oxygen evolution reactionhydrogen evolution reactionoverall water splittingsulfidebifunctional electrocatalyst

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Nano Research Energy
Volume 3 Issue 2,
June 2024
DOI: 10.26599/NRE.2023.9120106

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Cite this article:
Chen S, Zhang T, Han J, et al. Interface engineering of Fe-Sn-Co sulfide/oxyhydroxide heterostructural electrocatalyst for synergistic water splitting. Nano Research Energy, 2024, 3: e9120106. https://doi.org/10.26599/NRE.2023.9120106

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Received: 10 September 2023
Revised: 16 October 2023
Accepted: 18 October 2023
Published: 22 November 2023
© The Author(s) 2024. Published by Tsinghua University Press.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.