Preparation method and hydrogenation application of hollow IrCu / C nano-catalyst

By preparing hollow IrCu/C nanocatalysts, the problem of low selectivity in the selective hydrogenation reaction of existing Ir metal catalysts was solved, and the hydrogenation reaction of nitrobenzene was efficiently catalyzed, with product selectivity reaching 100%, and good catalytic stability was maintained.

CN119680569APending Publication Date: 2025-03-25LIAOCHENG UNIV
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Patent Information

Application Number
CN202411834584.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The existing Ir metal catalysts have low selectivity in selective hydrogenation reactions, and there is an inverse relationship between activity and stability, making it difficult to take into account both.

Method used

Using the preparation method of hollow IrCu/C nanocatalyst, IrCu nanoparticles were prepared by liquid phase reduction method, and uniformly loaded on the carbon black support, followed by acid etching and dealloyment treatment to form an IrCu/C nanocatalyst with a hollow structure.

Benefits of technology

Under mild reaction conditions, the Dealloyed Ir2.0Cu1.0/C catalyst achieved complete conversion of nitrobenzene, the selectivity of the target product aniline reached 100%, its performance was better than other reference catalysts, and it had good catalytic stability.

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Abstract

The invention discloses a preparation method and hydrogenation application of a hollow IrCu / C nano-catalyst, the hollow alloyed IrCu / C nano-catalyst is obtained by adopting a dealloying means, and the hollow alloyed IrCu / C nano-catalyst shows excellent performance in catalytic nitrobenzene selective hydrogenation reaction; the IrxCuy nano-particles with different molar ratios are prepared by adopting a liquid phase reduction method, then the IrxCuy nano-particles are uniformly loaded on the surface of a graphite C carrier, and the IrCu / C nano-catalyst with a hollow structure is obtained through further dealloying treatment. The catalyst catalyzes nitrobenzene hydrogenation under mild reaction conditions, complete conversion of nitrobenzene is achieved within 2.0 h, the selectivity of the target product aniline reaches 100%, the performance is superior to that of other reference catalysts, and the catalyst has good catalytic stability and wide adaptability.
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