Cited by 4Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsHydrogen Storage and Materials

Facile preparation of CoNiS/MXene/polypyrrole electrocatalyst with mischcrystal-amorphous interfaces for hydrogen evolution reaction

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Li, Hongxiang, Su, Ying, Guo, Tong, Zheng, Han, Sun, Bo, Yu, Chunhua, Cao, Jun, Li, Qiaoling +1 more·2025·Next Energy

Abstract

Electrocatalytic hydrogen evolution reaction (HER) offers a sustainable pathway for clean hydrogen production, while the developing of non-Pt catalysts with high activity and durability remains challenging. This work presents a CoNiS/MXene/polypyrrole (PPy) composite synthesized via a novel 2-step electrodeposition method, enabling precise control over morphology and interfacial properties. The catalyst achieves a low overpotential of 147 mV at 10 mA cm −2 in alkaline media, rivaling state-of-the-art non-Pt HER catalysts. Remarkably, it retains 99% activity after 2000 CV cycles and 12 h of continuous operation, demonstrating exceptional stability. Where, the mischcrystal-amorphous interfaces of CoNiS provides abundant active sites for HER. And the 3D-continuous structure of MXene/PPy offers a large specific surface area and efficient electron-transfer pathways, promoting high-speed charge transport and mass diffusion. The interfacial coupling between CoNiS and the MXene/PPy matrix was considered facilitating efficient charge transfer across their heterojunction interfaces. This interaction effectively prevents the agglomeration and structural degradation of CoNiS nanosheets during the electrocatalytic process, thereby significantly enhancing the stability of the catalyst. The synergistic effects of CoNiS, PPy, and MXene result in an optimized electronic structure and enhanced catalytic kinetics.

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Crossref · 10.1016/j.nxener.2025.100338

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  • Recent research has focused on other catalysts such as conductive polymers, metal-organic frameworks, and transition metal sulfides with the aim of producing hydrogen efficiently and sustainably.

    “Recent research has therefore focused on other catalysts such as conductive polymers, metal-organic frameworks, and transition metal sulfides with the aim of producing hydrogen efficiently and sustainably [47–50].”

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Authors
Li, H., Su, Y., Guo, T., Zheng, H., Sun, B., Yu, C., Cao, J., Li, Q., & Si, W.
Affiliations
Shandong University of Technology (CN)
Corresponding author
Si, Weimeng
Venue
Next Energy
Publisher
Elsevier BV
Published
2025-07
Volume
8
Pages
100338
ISSN
2949-821X (ISSN-L)
OpenAlex
W4411992026
Cited by
4
References
93
Citations by year
2026: 4
FWCI
0.56
Type
journal article
Language
en
Open access
Locations
  • Next Energy (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Natural Science Foundation of China (21706148)
  • Zibo City Integration Development Project (2019ZBXC358)
  • Qilu University of Technology State Key Laboratory of Biobased Material and Green Papermaking (KF2019-06)
  • Natural Science Foundation of Shandong Province (ZR2020ME041, ZR2022QB173, ZR2023MB054)
  • Shandong Academy of Sciences
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Materials Science › Materials Chemistry › Hydrogen Storage and Materials
Keywords
hydrogen evolution reaction, electrocatalysts, CONI, MXene, polypyrrole, electrodeposition, heterojunction, charge transfer, catalyst stability, alkaline water electrolysis, hydrogen production

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