A method for electrochemical catalytic reduction of carbon dioxide to produce ethylene

By optimizing the copper-based nanoarray electrode and anode catalyst, and combining medium-pressure operation with external CO source in the intermediate, the problems of selectivity and conversion rate and poor catalyst stability in the existing CO2 RR ethylene production technology have been solved, realizing efficient and low-cost CO2 electrolysis to ethylene production.

CN122303902APending Publication Date: 2026-06-30卢默金
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
卢默金
Filing Date
2026-04-01
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing CO2RR technology for ethylene production faces challenges such as difficulty in balancing selectivity and conversion rate, poor catalyst stability and resistance to poisoning, and low energy efficiency and high cost of anode reaction, making it difficult to achieve efficient and low-cost industrial application.

Method used

A multi-level copper-based nanoarray electrode with Sn/Zn doping and optimized anode catalyst is used. By operating under medium pressure and adding external CO to intermediate sources, the catalyst structure and reaction conditions are optimized to improve CO2 conversion and ethylene selectivity, and to withstand impurities in industrial waste gas.

Benefits of technology

Maintaining high ethylene Faraday efficiency under high current density, improving CO2 single-pass conversion rate, reducing energy consumption, suitable for complex industrial waste gases, and achieving efficient and low-cost CO2 electrolysis to ethylene production.

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Abstract

This invention relates to the field of electrochemical catalysis technology, and more particularly to a method for the electrochemical catalytic reduction of carbon dioxide to produce ethylene. This invention achieves high CO₂ conversion and ethylene yield through optimization of the cathode catalytic electrode, the anode catalytic electrode, and the CO₂ mixture introduced into the cathode (the addition of CO). The cathode of this invention employs a multi-level copper-based nanoarray electrode, whose unique nanowire array structure provides a large electrochemical active area and excellent gas-liquid mass transfer channels. Furthermore, by constructing a CuO / Cu₂O core-shell heterojunction and doping it with Sn / Zn, the adsorption energy of the key reaction intermediate *CO is precisely controlled, greatly promoting the carbon-carbon coupling reaction pathway, thereby maintaining a high ethylene Faradaic efficiency even at high current densities. The cathode and anode catalytic electrodes of this invention are suitable for CO₂ mixtures with high sulfur dioxide and nitric oxide content, exhibiting strong tolerance and enabling direct treatment of complex industrial waste gases, thus better meeting the actual conditions of industrial waste gases.
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