Citation: Jun Yu, Yangping Zhang, Nannan Zhang, Jie Li, Huiyu Sun, Xinyu Gu, Changqing Ye, Tianpeng Liu, Yukou Du. The interface engineering strategy assists the 3D core-shell structure Co₃S₄/CuS@NiFe LDH nanocoral spheres to achieve significant overall water splitting[J]. Chinese Chemical Letters, ;2026, 37(2): 110830. doi: 10.1016/j.cclet.2025.110830 shu

The interface engineering strategy assists the 3D core-shell structure Co₃S₄/CuS@NiFe LDH nanocoral spheres to achieve significant overall water splitting

Jun Yu ^a ,
Yangping Zhang ^a ,
Nannan Zhang ^a ,
Jie Li ^a ,
Huiyu Sun ^a ,
Xinyu Gu ^a ,
Changqing Ye ^{b, *,} ,
Tianpeng Liu ^a ,
Yukou Du ^{a, *,}

a.
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
b.
Jiangsu Key Laboratory for Environment Functional Materials, College of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China

yechangqing@mail.usts.edu.cn

duyk@suda.edu.cn

Received Date: 18 November 2024
Revised Date: 26 December 2024
Accepted Date: 6 January 2025
Available Online: 6 January 2025

Figures(4)

Designing a highly active and stable bifunctional catalyst is essential for achieving superior overall water splitting (OWS). In this study, a three-dimensional (3D) core-shell structure Co₃S₄/CuS@NiFe LDH nanocoral spheres electrocatalyst was constructed on nickel foam (NF) via an interfacial engineering strategy. This 3D core-shell heterostructure maximizes the exposure of active sites, optimizes the charge transport pathway and accelerates gas release rates. The protective shell strategy of NiFe LDH provides favorable stability, which contributes to inhibiting the electrochemical corrosion of the electrocatalyst and mitigating the toxic effects of Cl⁻ and other microorganisms during the seawater splitting process. Moreover, the introduction of NiFe LDH induces a change in the OER mechanism from an adsorption evolution mechanism (AEM) to a lattice oxygen mechanism (LOM), which improves the intrinsic activity of the catalyst. Consequently, Co₃S₄/CuS@NiFe LDH demonstrates exceptional performance in the oxygen evolution reaction (OER) (η₁₀₀ = 251 mV) and in the hydrogen evolution reaction (HER) (η₁₀₀ = 254 mV), alongside remarkable stability over 100 h. For OWS, it exhibits a voltage of 1.46 V at 10 mA/cm² and maintain stability for 100 h. Impressively, Co₃S₄/CuS@NiFe LDH still possesses outstanding activity and stability in natural alkaline seawater. This work proposes interfacial engineering to construct bifunctional catalysts with core-shell heterostructures, providing instructive guidelines for the design of highly efficient electrocatalysts toward seawater electrolysis.
- Core-shell structure,
- Layered double hydroxides,
- Transition metal sulphides,
- Bifunctional catalyst,
- Overall water splitting,
- Overall seawater splitting
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沈阳化工大学材料科学与工程学院沈阳 110142

The interface engineering strategy assists the 3D core-shell structure Co3S4/CuS@NiFe LDH nanocoral spheres to achieve significant overall water splitting

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通讯作者: 陈斌, bchen63@163.com

The interface engineering strategy assists the 3D core-shell structure Co₃S₄/CuS@NiFe LDH nanocoral spheres to achieve significant overall water splitting