Copper oxide porous nanoflower catalyst as well as preparation method and application thereof

The template method was used to prepare porous copper oxide nanoflower catalysts, which solved the problem of low active site density in the electroreduction reaction of carbon monoxide by copper-based catalysts. This method achieved high efficiency, high selectivity and high yield of carbon monoxide electroreduction to multi-carbon products, and is suitable for industrial applications.

CN121023558APending Publication Date: 2025-11-28YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE (HUZHOU)
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Patent Information

Application Number
CN202511086965.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-05
Publication Date
2025-11-28

AI Technical Summary

Technical Problem

Existing copper-based catalysts in the electroreduction reaction of carbon monoxide suffer from low density of surface active sites and lack of precise control over the adsorption and desorption capacity of key intermediates, resulting in uncontrollable product distribution and low current density, making it difficult to efficiently prepare highly selective multi-carbon products.

Method used

Porous copper oxide nanoflower catalysts were prepared using a template method. The nanoflowers were formed by hydrothermal synthesis and removal of the template agent, resulting in a porous flower-like structure with a size of 1.8–2.2 μm and a pore size of 100–150 nm. This improved the active site density and carbon monoxide electroreduction efficiency of the catalyst.

Benefits of technology

The method achieves high selectivity and high yield of carbon monoxide electroreduction to multi-carbon products. The Faraday efficiency of multi-carbon products in the flow electrolyzer exceeds 90%, and the Faraday efficiency of ethylene exceeds 40%. It is suitable for industrial application of carbon monoxide electroreduction to prepare multi-carbon products.

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Abstract

The invention provides a copper oxide porous nanoflower catalyst and a preparation method and application thereof.The catalyst is in a porous flower shape, the size of nanoflowers ranges from 1.8 micrometers to 2.2 micrometers, the thickness of nanoflowers ranges from 50 nanometers to 150 nanometers, and the pore diameter of nanoflowers ranges from 100 nanometers to 150 nanometers. The preparation method comprises the steps that copper salt, ammonia water and polystyrene spheres are fully mixed and then subjected to a complete hydrothermal reaction at the temperature of 70 DEG C to 120 DEG C, and the copper oxide porous nanoflower catalyst is obtained. And after cooling, centrifuging, washing and drying, washing away the residual polystyrene template by using a solvent, and centrifuging and thoroughly drying to obtain the copper oxide porous nanoflower catalyst. The obtained copper oxide porous nanoflower catalyst can be used for a carbon monoxide electroreduction reaction, the prepared catalyst has high carbon monoxide electroreduction electroreaction catalytic activity by introducing a nanometer hole structure on the nanometer size, and the high yield of carbon monoxide to multi-carbon products and the single selectivity of ethylene products are achieved.
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