Composite electrode material and preparation method and application thereof

By forming Cr-doped nickel-iron hydroxide nanosheets on a stainless steel mesh, the problems of iron dissolution and stability degradation in nickel-iron hydroxide during water electrolysis for oxygen production were solved, thereby improving the stability of the catalyst and the performance of water electrolysis for oxygen production.

CN120400887BActive Publication Date: 2026-01-27SHANDONG UNIV OF SCI & TECH
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Patent Information

Application Number
CN202510597940.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-05-09
Publication Date
2026-01-27
Estimated Expiration
2045-05-09

AI Technical Summary

Technical Problem

Existing nickel-iron hydroxides suffer from problems such as iron dissolution, loss, and decreased activity stability during long-term water electrolysis for oxygen production. Furthermore, the foamed iron carrier is prone to rusting, leading to catalyst detachment.

Method used

Using stainless steel mesh as a carrier, Cr3+ and Fe3+ ions are released through cyclic voltammetry (CV activation) to form Cr-doped nickel-iron hydroxide nanosheets, achieving surface roughening treatment and serving as a real-time iron source to solve the problem of iron dissolution and loss.

Benefits of technology

It improves the catalyst stability and activity of nickel-iron hydroxide, enhances the performance of the water electrolysis oxygen production process, reduces iron loss, extends service life, promotes the adsorption of OH- in the electrolyte, and improves the activity of the hydrogen production reaction.

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Abstract

The application relates to the technical field of electrolytic water oxygen production, in particular to a composite electrode material and a preparation method and application thereof. The preparation method of the composite electrode material comprises the following steps: roughening the surface of a stainless steel mesh by performing first CV activation on the stainless steel mesh in a KOH solution, releasing Cr 3+ ions in the stainless steel mesh 3+ ions, and obtaining the stainless steel mesh after CV activation; performing second CV activation on the stainless steel mesh after CV activation in a Ni 2+ ion solution, forming Cr-doped nickel-iron hydroxide covering the surface of the stainless steel mesh, and obtaining the composite electrode material. The Cr-doped nickel-iron hydroxide loaded on the surface of the stainless steel mesh obtained by the preparation method can solve the technical problems of iron element dissolution, deactivation and active stability decline of the existing nickel-iron hydroxide in a long-period oxygen evolution process.
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