Preparation method and application of fuel cell catalyst

Preparation of Pt catalysts with hollow nanocrystalline structures by sol-gel method solves the problems of complex process, high cost and insufficient stability in the prior art, and achieves high performance, stability and environmentally friendly fuel cell catalyst preparation.

CN119674103APending Publication Date: 2025-03-21UNILIA (SHANGHAI) FUEL CELLS INC
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Patent Information

Application Number
CN202411849253.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing fuel cell catalysts have complex preparation processes, high cost, unfriendly environment, and the limited and incomplete removal of precious metals lead to insufficient stability and durability of the catalyst.

Method used

The Pt catalyst with hollow nanocrystalline structure was prepared by sol-gel method, and through magnetic stirring, heat treatment, liquid phase loading and gas phase reduction, an internal bridged multi-stage framework structure was constructed to simplify the process and reduce costs.

Benefits of technology

It realizes the high performance and stability of the catalyst, improves the activity and durability of the oxygen reduction reaction, simplifies the preparation process, reduces the equipment cost and environmental impact, and is suitable for large-scale mass production.

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Abstract

The invention provides a preparation method and application of a fuel cell catalyst, and belongs to the technical field of catalysts. Comprising the following steps: S1, sequentially adding a platinum precursor solution, a first solvent and a second solvent, magnetically stirring until the mixture reaches a clear state, and standing and aging at normal temperature to obtain sol-gel; s2, the obtained sol-gel is placed in a muffle furnace for heat treatment, then the sol-gel is naturally cooled to the room temperature, and calcined powder is taken out, ground, cleaned and dried; s3, taking the powder and a carbon carrier, adding a third solvent and a dispersing aid, carrying out emulsification shearing dispersion under an ice-water bath condition, and then filtering and drying; and S4, placing the cleaned powder in a tubular furnace, introducing a reducing atmosphere, carrying out heating reduction, cooling to room temperature, taking out the powder, cleaning, and drying to obtain the supported hollow-structure Pt catalyst powder. The preparation process is simple and easy to operate, low in equipment cost and maintenance cost, environment-friendly and easy to realize industrial continuous mass production.
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