A heterojunction nanoarray material, a preparation method therefor and use thereof

By preparing heterojunction nanoarray materials, the problems of insufficient catalyst activity and oxidative corrosion in the process of hydrogen production by water/seawater electrolysis were solved, achieving efficient and stable hydrogen and oxygen evolution performance, and adapting to the fluctuations of renewable energy.

CN120041868BActive Publication Date: 2026-06-16SHENZHEN HINGEAR ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN HINGEAR ENERGY CO LTD
Filing Date
2024-12-19
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing technologies lack high-current, highly active hydrogen evolution catalysts. The process of producing hydrogen from water/seawater by electrolysis suffers from problems such as the influence of oxidation current, cathode corrosion, and insufficient catalyst design. In particular, the electrolyzer reverses severely when renewable energy fluctuates.

Method used

Heterojunction nanoarray materials, including metal phosphide/metal sulfide/metal silicate and metal oxide nanoarrays, are prepared by hydrothermal method and electrodeposition to form heterojunction structures, which are then loaded onto a conductive substrate. The three-phase interface and passivation layer are optimized to resist oxidation and corrosion.

Benefits of technology

It significantly reduces hydrogen evolution overpotential, increases current growth rate under high current, improves stability, enables long-term operation under alkaline conditions, resists oxidation and corrosion, and adapts to fluctuations in renewable energy.

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Abstract

The application belongs to the technical field of electrode materials, and particularly relates to a kind of heterojunction nano array materials and its preparation method and use.The heterojunction material includes: metal phosphide / metal sulfide / metal silicate and metal oxide nano array;Heterojunction is formed between the metal phosphide / metal sulfide / metal silicate and metal oxide;Metal phosphide / metal sulfide / metal silicate is metal phosphide, metal sulfide or metal silicate.In the material of the application, due to the affinity of metal oxide to OH intermediate, the hydrolysis under alkaline conditions is effectively promoted, and the hydrogen evolution overpotential under large current is reduced.In the material of the application, due to the optimization of three-phase interface by nano array structure, the overflow of gas bubble on the electrode surface is accelerated, and the current increase rate under large current in the hydrogen evolution process is significantly increased.
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