Nickel-zinc-iron ternary oxygen evolution electrode and preparation method and application thereof

By employing nickel-zinc layer electrodeposition and electrochemical oxidation combined with iron replacement, the problems of uneven composition and structural instability of the nickel-zinc-iron ternary oxygen evolution electrode under mild conditions were solved, and a highly active and stable porous ternary composite electrode was constructed, thereby improving the oxygen evolution performance of the electrode in alkaline water electrolysis.

CN122147433AActive Publication Date: 2026-06-05BAOSHILAI NEW MATERIAL TECHNOLOGY (SUZHOU) CO LTD
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Patent Information

Application Number
CN202610639331.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-11
Publication Date
2026-06-05
Estimated Expiration
2046-05-11

AI Technical Summary

Technical Problem

Existing technologies struggle to uniformly co-deposit nickel, iron, and zinc under mild conditions to form a stable ternary oxygen evolution electrode, resulting in uneven composition and unstable structure, which affects the electrode's conductivity and catalytic performance.

Method used

A nickel-zinc pre-plated layer was electrodeposited on a conductive substrate using a method of nickel-zinc layer electrodeposition, electrochemical oxidation, and iron replacement. Under specific conditions, electrochemical oxidation was carried out to generate soluble zincate ions, forming abundant channels and defects. Iron ions replaced zinc sites to form highly active hydroxyl oxides, thus constructing a porous ternary nickel-zinc-iron composite electrode.

Benefits of technology

The high activity and stability of the nickel-zinc-iron ternary oxygen evolution electrode in alkaline water electrolysis were achieved, improving the structural stability of the electrode and its bonding ability with the substrate, and significantly enhancing the oxygen evolution performance.

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Abstract

The invention relates to a nickel-zinc-iron ternary oxygen evolution electrode as well as a preparation method and application thereof. The preparation method comprises the following steps: (a) electrodepositing and plating a nickel-zinc pre-plating layer on a conductive substrate; and (b) placing the conductive substrate plated with the nickel-zinc pre-plating layer as an anode and a nickel electrode as a cathode in a hydroxide aqueous solution containing an iron source, and carrying out electrochemical oxidation under the conditions that the temperature is 70-90 DEG C and the anode potential is 1.8-2.2 V. A conductive substrate plated with a nickel-zinc pre-plating layer is used as an anode, a nickel electrode is used as a cathode for electrochemical oxidation, so that metal zinc in the pre-plating layer is subjected to anodic dissolution, soluble zincate ions are generated, and abundant pore channels and defects are formed in the electrode in situ; iron ions in the electrolyte are subjected to a replacement reaction on the dissolved zinc sites or the exposed nickel sites and are introduced into the electrode framework; therefore, the porous ternary nickel-zinc-iron composite electrode which has higher stability and activity and is firmly combined with the substrate is finally obtained.
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