Prussian blue composite material and preparation method and application thereof

By preparing a Prussian blue composite material that combines the advantages of cerium and Prussian blue, and employing hydrothermal and solution immersion methods, the problems of poor stability and high cost of platinum-based electrocatalysts were solved, achieving efficient water electrolysis for hydrogen and oxygen evolution reactions, which is suitable for large-scale industrial production.

CN115505939BActive Publication Date: 2025-11-11JIANGXI ZHIDUN TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202211203518.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-29
Publication Date
2025-11-11
Estimated Expiration
2042-09-29

AI Technical Summary

Technical Problem

Existing platinum-based electrocatalysts suffer from poor stability and high cost in the hydrogen evolution reaction of water electrolysis, which limits their commercial application. There is a need to develop a low-cost, high-performance, and stable electrocatalyst material.

Method used

Using Prussian blue composite materials, cerium salts and urea are coated onto carbon cloth to form cerium hydroxide coating through hydrothermal and solution immersion methods. Then, cobalt iron Prussian blue material is prepared by reacting it with potassium ferricyanide and cobalt salts. Combining the advantages of cerium and Prussian blue, the material properties are optimized.

Benefits of technology

The prepared Prussian blue composite material exhibits excellent performance in hydrogen and oxygen evolution reactions during water electrolysis, reducing energy consumption and improving hydrogen production efficiency. The process is simple and suitable for large-scale industrial production.

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Abstract

This invention relates to a Prussian blue composite material, its preparation method, and its applications. First, carbon cloth is heated and ultrasonically cleaned to remove the hydrophobic coating, oily substances, and impurities from its surface. Then, the pretreated carbon is placed in a cerium salt-urea mixed solution for a hydrothermal reaction to obtain cerium hydroxide-coated carbon cloth. The cerium hydroxide-coated carbon is then placed in a tube furnace and heat-treated at 300-600°C in air for approximately 1 hour for later use. A cobalt salt-citrate mixed solution and a potassium ferricyanide solution of a certain concentration are prepared separately. The carbon obtained in the previous step is placed in the potassium ferricyanide solution, and then the cobalt salt-citrate mixed solution is slowly added dropwise through a separatory funnel. After the addition is complete, the immersion reaction is carried out for 24 hours to obtain the Prussian blue composite material. This Prussian blue composite material exhibits excellent performance in the hydrogen and oxygen evolution reactions of water electrolysis, not only reducing the energy consumption of water electrolysis but also significantly improving the hydrogen production efficiency, showing promising application prospects.
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