Preparation method and application of double-cobalt-atom catalyst

The cobalt atom catalyst prepared by the Schiff base reaction solves the problem of insufficient active sites in photocatalytic CO2 reduction, achieves efficient CO and H2 generation, and demonstrates good cycle stability and economy.

CN122141767AActive Publication Date: 2026-06-05ANHUI UNIV
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Patent Information

Application Number
CN202610617814.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-07
Publication Date
2026-06-05
Estimated Expiration
2046-05-07

AI Technical Summary

Technical Problem

In existing photocatalytic CO2 reduction systems, the narrow light response range, severe recombination of photogenerated carriers, and insufficient active sites result in low catalytic efficiency. Single-atom metal catalysts are unable to meet the multi-step proton-coupled electron transfer requirements of CO2 reduction, making it difficult to improve product selectivity and catalytic activity.

Method used

By employing the Schiff base reaction to precisely anchor cobalt atoms into the organic framework, atomic-level dispersion of the bimetallic active centers is achieved. The synergistic effect of the two active sites is utilized to accelerate charge transfer, thus preparing a structurally stable and atomically uniform cobalt atom catalyst.

Benefits of technology

It improves the photocatalytic CO2 reduction activity, generates CO and H2 at high rates, has good stability for catalyst recycling, and the preparation process is mild, economical, and easy to scale up.

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Abstract

The invention belongs to the technical field of catalytic materials, and discloses a preparation method and application of a double-cobalt-atom catalyst. According to the method, the target catalyst Co2-DAC is prepared through the steps of mixed solution preparation, preheating dropwise adding, constant-temperature backflow, aftertreatment purification and the like, the reaction condition is mild, inert gas protection is not needed, the process is simple, and the cost is low. The prepared catalyst takes double cobalt atoms as an active center, is uniform in atom dispersion and stable in structure, can improve charge transfer and CO2 activation performance by virtue of a synergistic effect of double active sites, shows relatively high activity and stability in a photocatalytic CO2 reduction reaction, can effectively convert CO2 into a high-added-value product, and has a good application prospect. And guidance is provided for designing a diatomic catalyst with high-efficiency photocatalytic CO2 reduction activity.
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