Method for preparing mesoporous carbon supported platinum single atom or cluster catalyst and application thereof

By using a method for preparing platinum single-atom or cluster catalysts supported on mesoporous carbon, the problem of uneven aggregation and dispersion of Pt nanoparticles during high-temperature calcination was solved, achieving high ORR catalytic activity and atom utilization, and reducing fuel cell costs.

CN117317266BActive Publication Date: 2026-06-16CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2023-10-18
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing Pt nanoparticles tend to aggregate, migrate, and grow during high-temperature calcination, resulting in low ORR catalytic activity and atom utilization of Pt-based catalysts, as well as high cost.

Method used

A method for preparing platinum single-atom or cluster catalysts supported on mesoporous carbon is adopted. By combining hard template agents with soft template agents, a spherical composite micelle structure is formed to ensure the uniform distribution of noble metal precursors in mesoporous carbon. Heat treatment is carried out in a nitrogen environment to limit the aggregation and growth of Pt. Subsequently, the hard template agent is etched away to obtain a uniformly dispersed mesoporous carbon supported platinum single-atom or cluster catalyst.

Benefits of technology

The ORR catalytic activity and atom utilization of Pt-based catalysts were improved, significantly reducing fuel cell costs. The catalysts exhibited excellent dispersibility and size uniformity, and their catalytic activity and stability were significantly enhanced.

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Abstract

The present application relates to precious metal electrocatalysis technical field, disclose the preparation method of mesoporous carbon supported platinum single atom or cluster catalyst, including the following steps: S1: hard template agent, soft template agent, reamer and carbon precursor are dispersed in the solution of ethanol and water, obtain mixed solution, add noble metal precursor solution to the mixed solution, form milky white mixed solution;S2: ammonia is added to the milky white mixed solution prepared in S1, and stirring under 500-1000rmp for 4-10h, then centrifugal and drying treatment;S3: the product obtained in S2 is calcined under nitrogen atmosphere, and is reacted in NaOH solution, obtain mesoporous carbon supported platinum single atom or cluster catalyst;The application of mesoporous carbon supported platinum single atom or cluster catalyst in fuel cell, the technical scheme of the present application can improve the ORR catalytic activity and atomic utilization rate of Pt-based catalyst, so as to greatly reduce the cost of fuel cell.
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