Preparation method of exquisite hierarchical pore structure mesoporous carbon

By using solid silicon spheres grafted onto CTAB to synthesize exquisite multi-level pore structured mesoporous carbon, the problems of cumbersome traditional mesoporous carbon synthesis process and unstable structure were solved, and efficient mesoporous carbon materials were applied to hydrogen fuel cell catalysts, thereby improving the electrochemical performance and stability of the catalysts.

CN120664530APending Publication Date: 2025-09-19NANJING UNIV
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Patent Information

Application Number
CN202510843271.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-23
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

The traditional mesoporous carbon synthesis process is complicated, the structure is unstable, the mesopore utilization rate is low, and it is easily poisoned by Pt active sites in hydrogen fuel cells, resulting in reduced catalyst durability.

Method used

A one-pot method of grafting CTAB onto solid silicon spheres was used to synthesize exquisite hierarchical mesoporous carbon. By adding carbon sources and surfactants to the surface of the silicon spheres, a stable shell structure was formed after carbonization, and a hollow structure was formed to improve the transmission efficiency and mechanical stability.

Benefits of technology

The synthesis process of mesoporous carbon has been simplified, the repeatability and mechanical stability of mesoporous carbon have been improved, the three-dimensional connectivity has been enhanced, and the electrochemical performance of the catalyst has been improved.

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Abstract

The invention relates to the field of mesoporous carbon material preparation, and discloses a preparation method of exquisite hierarchical pore structure mesoporous carbon, which comprises the following steps: uniformly stirring solid silicon balls, a carbon source, a surfactant, water and ethanol to obtain a mixed solution; adding cobalt nitrate, heating and stirring until the mixture is sticky, so as to obtain a carbon-silicon compound precursor; performing high-temperature carbonization in an inert atmosphere to obtain a carbon-silicon compound; soaking the carbon-silicon compound in an alkaline solution, filtering, washing and drying to obtain an exquisite hierarchical pore structure mesoporous carbon primary product; and carrying out high-temperature curing in an inert atmosphere, naturally cooling, cleaning and drying. The exquisite hierarchical pore structure mesoporous carbon is synthesized by adopting a solid silicon ball grafted CTAB one-pot method, the problem that a traditional hard template method for synthesizing mesoporous carbon is tedious in technology is solved, the technological process is simplified, and the method has high repeatability, mechanical stability and three-dimensional connectivity.
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