Volume 20, Issue 43 2403596
Research Article

Architecting Ni3Se4-NiSe2-Co3O4 Triple-Interface Heterostructure on MXene Nanosheets for Boosting Water Splitting by Electronic Modulation and Interface Effects

Liang Yan

Corresponding Author

Liang Yan

School of Chemistry and Materials Engineering, Huizhou University, Huizhou, Guangdong, 516007 P. R. China

E-mail: [email protected]; [email protected]

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Yonghang Chen

Yonghang Chen

School of Chemistry and Materials Engineering, Huizhou University, Huizhou, Guangdong, 516007 P. R. China

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Jiachun Xie

Jiachun Xie

School of Chemistry and Materials Engineering, Huizhou University, Huizhou, Guangdong, 516007 P. R. China

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Hao Li

Corresponding Author

Hao Li

School of Chemistry and Materials Engineering, Huizhou University, Huizhou, Guangdong, 516007 P. R. China

E-mail: [email protected]; [email protected]

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First published: 15 August 2024
Citations: 19

Abstract

Strategically engineering electrocatalysts with optimized interfacial electronic architectures and accelerated reaction dynamics is pivotal for augmenting hydrogen generation via alkaline water electrolysis on an industrial scale. Herein, a novel triple-interface heterostructure Ni3Se4-NiSe2-Co3O4 nanoarrays are designed anchored on Ti3C2Tx MXene (Ni3Se4-NiSe2-Co3O4/MXene) with significant work function difference (ΔΦ) as bifunctional electrocatalysts for water electrolysis. Theoretical calculations combined with experiments uncover the pivotal role of the interface-induced electric field in steering charge redistribution, which in turn modulates the adsorption and desorption kinetics of reaction intermediates. Furthermore, the synergistic interaction between Ni3Se4-NiSe2-Co3O4 and Ti3C2Tx MXene nanosheets endows the hybrids with a large electrochemical surface area, abundantly active sites, and high conductivity. Thus, Ni3Se4-NiSe2-Co3O4/MXene manifests exceptional catalytic prowess for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In addition, the Ni3Se4-NiSe2-Co3O4/MXene electrocatalyst in the water electrolyzer delivers excellent performance and maintains commendable stability beyond 100 h of electrocatalytic operation.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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