A core-shell structure zinc-cobalt double-atomic catalyst, a preparation method and application thereof

By preparing a core-shell structured zinc-cobalt dual single-atom catalyst, the problems of harsh reaction conditions and high cost in the synthesis of formamide in the existing technology have been solved. This has enabled the efficient catalytic conversion of nitrobenzene to formamide under normal pressure, with high conversion rate and selectivity, and is suitable for low-cost industrial synthesis.

CN119771461BActive Publication Date: 2026-07-03ANHUI NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI NORMAL UNIV
Filing Date
2024-12-02
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies for the synthesis of formamide are subject to harsh reaction conditions, high costs, and numerous byproducts. Existing single-atom catalysts require high temperatures and long reaction times in the reduction and N-formylation of nitrobenzene, making it difficult to achieve low-cost and efficient catalytic effects.

Method used

A core-shell structured zinc-cobalt dual single-atom catalyst is used, with ZIF-67 as the core and ZIF-8 as the shell. This core-shell structured catalyst is used for the reduction and N-formylation of nitrobenzene. The reaction conditions are mild, the catalyst is not prone to agglomeration, and the cost is low.

Benefits of technology

This method achieves highly efficient catalytic conversion of nitrobenzene to formamide under ambient pressure, with a conversion rate of over 95% and a selectivity of over 93%. The reaction is fast, quick, and yields high products, providing a low-cost, high-quality synthetic route.

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Abstract

This invention discloses a core-shell structured zinc-cobalt dual single-atom catalyst, its preparation method, and its application, belonging to the field of catalyst material technology. The method includes the following steps: ZIF-67 and zinc nitrate hexahydrate are added to methanol and mixed evenly, then a methanol solution of 2-methylimidazole is added. The mixture is stirred and mixed at room temperature for 12 hours, the precipitate is separated by centrifugation and washed with methanol, and dried to obtain a precursor. The precursor is calcined at 850-950℃ for 2 hours to obtain the core-shell structured zinc-cobalt dual single-atom catalyst. Its application includes the following steps: the core-shell structured zinc-cobalt dual single-atom catalyst, nitrobenzene, formic acid, and a non-polar organic solvent are stirred and mixed, then nitrogen gas is introduced, and the reaction is stirred at 90℃ for 1-2 hours to obtain formamide. The preparation method of this invention is simple, low-cost, green, and safe, exhibiting excellent catalytic activity and selectivity in N-formylation reactions.
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