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2000
Volume 21, Issue 4
  • ISSN: 1573-4137
  • E-ISSN: 1875-6786

Abstract

Introduction

The development of cost-effective and efficient catalysts plays a pivotal role in the realization of hydrogen production through electrochemical water splitting.

Methods

In this study, two-dimensional NiCoS nanosheets were synthesized using a hydrothermal method followed by a sulfidation process.

Results

The resulting materials were thoroughly characterized to understand their morphology and structure. The findings indicate that the NiCoS nanosheets exhibit exceptional electrical conductivity and a high density of pores, which facilitate electrolyte infiltration and interfacial charge transfer during electrochemical reactions. Furthermore, the incorporation of S2− modulates the electronic structure of metal ions, reducing the oxidation potential of metal sites and promoting the surface reconstruction of the electrode to form active species. Electrochemical tests conducted in a 1 M KOH solution using the synthesized catalyst as the working electrode demonstrate an overpotential of merely 280 mV and 300 mV at a current density of 20 mA cm−2 and 40 mA cm-2, respectively, which are much lower than those of NiCo-LDH electrodes (360 mV and 410 mV).

Conclusion

Furthermore, the NiCoS electrode delivers a remarkably low Tafel slope of 47.9 mV dec−1. This investigation presents a novel approach to the development of efficient transition metal-based electrocatalysts.

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2024-07-08
2025-10-10

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Two-Dimensional NiCo2S4 Nanosheets Deliver Efficient Oxygen Evolution Reaction
Curr. Nanosci. 21, 749 (2025); https://doi.org/10.2174/0115734137319139240614103935
/content/journals/cnano/10.2174/0115734137319139240614103935
/content/journals/cnano/10.2174/0115734137319139240614103935
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  • Article Type:     Research Article
Keyword(s): electrocatalysis; electronic structure; hydrogen; NiCo2S4; oxygen evolution reaction; Two-dimensional

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