A platinum catalyst for proton exchange membrane electrolysis of water and a preparation method and application thereof

By optimizing the modification of the silica support and controlling the platinum particles, the problems of agglomeration and synergy of platinum-based catalysts in proton exchange membrane water electrolysis for hydrogen production were solved, achieving efficient and stable water electrolysis for hydrogen production.

CN122406285APending Publication Date: 2026-07-17XIAMEN JIAHYDROGEN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN JIAHYDROGEN TECH CO LTD
Filing Date
2026-03-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing proton exchange membrane electrolysis water production hydrogen technology, platinum-based catalysts are prone to agglomeration and particle growth, resulting in decreased catalytic performance. The synergistic effect between the catalyst and the proton exchange membrane is difficult, and the selection and optimization of the support are complex, leading to increased interfacial resistance and decreased battery performance.

Method used

Using silica as a support, a well-developed pore structure and suitable surface properties are formed through a specific modification process. The size of platinum particles is controlled within the optimal range to form a continuous electron conduction network, which enhances the wettability and interfacial bonding between the catalyst and the proton exchange membrane, and optimizes the support preparation and modification process.

Benefits of technology

It improves the dispersion of platinum particles and the number of active sites, enhances the stability of the catalyst and its synergy with the proton exchange membrane, improves the efficiency of hydrogen production by water electrolysis and the performance of the membrane electrode, and is suitable for long-term operation.

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Abstract

The application provides a platinum catalyst for water electrolysis of a proton exchange membrane and a preparation method and application thereof, and comprises the following steps: S1, adding a sulfuric acid solution into a precipitation container, then adding a sodium metasilicate solution and a hydrochloric acid solution into the precipitation container at a certain precipitation temperature to perform precipitation, keeping warm for a period of time after the addition is completed, and filtering, washing and drying the precipitate to obtain a white carbon black carrier; S2, immersing the obtained white carbon black carrier into an alcohol, adding an alkali solution dropwise to adjust the pH to 7.5-9.0 in the stirring process, and evaporating to dryness to obtain a modified white carbon black carrier; S3, preparing a suspension of the modified white carbon black carrier, adding a platinum source, keeping warm at 80-100 DEG C for 20-40 min, adjusting the pH to 8.0-9.0 with an alkali solution, adding a reducing agent to perform reduction, and filtering, washing and drying, so that the platinum catalyst for water electrolysis of the proton exchange membrane is obtained. The platinum catalyst still has good stability and high catalytic activity under a high current density.
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