Nickel mesh-based catalytic electrode for hydrogen production by alkaline electrolysis of water and method for preparing the same

By using supersonic plasma spraying and flame spraying remelting technology, Ni-Mo-Co alloy catalytic electrodes were prepared, solving the problem of balancing catalytic activity and stability in alkaline water electrolysis for hydrogen production. This achieved simultaneous improvement in both high activity and high stability, meeting the long-term operation requirements of industrial electrolyzers.

CN122406283APending Publication Date: 2026-07-17NORTH CHINA ELECTRIC POWER UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTH CHINA ELECTRIC POWER UNIV
Filing Date
2026-06-12
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing alkaline water electrolysis hydrogen production technologies suffer from insufficient catalytic activity, high cost of precious metals, poor coating stability, and the tendency of traditional alloy catalysts to detach in alkaline environments, making it difficult to simultaneously meet the requirements of high activity and high stability.

Method used

A Ni-Mo-Co alloy catalytic electrode was prepared using supersonic plasma spraying combined with flame spraying and remelting technology. Through functional gradient coating design, high interfacial bonding strength and low hydrogen evolution overpotential were achieved. The electrode consists of a Ni70Mo17.5Co12.5 ternary alloy catalytic active layer and a Ni-Co/Ni-Mo-Co gradient transition layer.

Benefits of technology

This technology achieves simultaneous improvement in high HER activity and high binding strength, breaks through traditional technical biases, and significantly improves the electrochemical stability and thermal cycling resistance of the electrode, meeting the long-term operation requirements of industrial electrolyzers.

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Abstract

本发明涉及一种用于碱性电解水制氢的镍网基催化电极，其包括镍网基底及功能性涂层，其中，所述功能性涂层包括成分为Ni‑Mo‑Co合金的催化活性层，在催化活性层中，Ni含量为68 wt%‑72 wt%，Mo含量为15.5 wt%‑19.5 wt%，Co含量为10.5 wt%‑14.5 wt%，余量为不可避免的杂质。本发明还提供了一种镍网基底及功能梯度涂层，涂层沿厚度方向依次为Ni‑Co结合层、Ni‑Mo‑Co梯度过渡层和Ni‑Mo‑Co催化活性层。上述电极在1 M KOH中10 mA / cm2下过电位仅90 mV，超声脱落率低于0.2%，60 h稳定性衰减小于2 mV。
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