A method for preparing a supported copper nitride catalyst

Supported copper nitride catalysts were prepared by ball milling, and Cu3N was loaded onto the defect sites of conductive carbon materials. This solved the problem of insufficient selectivity and stability of Cu-based catalysts in the carbon dioxide electroreduction reaction, and achieved high selectivity and high activity catalytic effect.

CN117920311BActive Publication Date: 2026-06-12CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
Filing Date
2024-02-08
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing Cu-based catalysts are difficult to achieve high selectivity for a single product in the electroreduction of carbon dioxide, and the Cu3N/CxNy catalyst has insufficient conductivity and stability.

⚗Method used

A supported copper nitride catalyst was prepared by ball milling a mixture of copper cyanamide and conductive carbon material, controlling the milling speed and time. Cu3N was loaded onto the defect sites of the conductive carbon material to improve the structural stability and conductivity of the catalyst.

🎯Benefits of technology

This study achieved high selectivity and stability of the catalyst in the carbon dioxide electroreduction reaction, reduced overpotential, and improved the selectivity and catalytic activity of the C2H4 product.

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Abstract

The application relates to the technical field of carbon dioxide electro-reduction catalysts, and discloses a preparation method of a supported copper nitride catalyst, which comprises the following steps: mixing copper cyanamide and conductive carbon material and performing ball milling; the rotating speed of the ball milling is 500 r / min-5000 r / min, and the ball milling time is 1h-24h; the mass ratio of the copper cyanamide and the conductive carbon material is 1-10:1-10. The catalyst obtained by the method has better stability, selectivity and activity in a carbon dioxide electro-catalytic reduction reaction, and the addition of the conductive carbon improves the conductivity of the catalyst, so that the overpotential of the catalyst in the carbon dioxide electro-reduction is significantly reduced.
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