Electrocatalytic carbon dioxide reduction device

By using a gallium/copper oxide electrode and a cathode catalyst layer made of perfluorosulfonic acid resin binder in an electrocatalytic carbon dioxide reduction device, combined with an electric heating element and a temperature sensor, the problem of uncontrollable reaction temperature was solved, achieving efficient conversion of carbon dioxide to ethanol and improving the stability and lifespan of the device.

CN122279632APending Publication Date: 2026-06-26HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Filing Date
2026-04-29
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing electrocatalytic carbon dioxide reduction devices suffer from problems such as uncontrollable reaction temperature, slow low-temperature start-up, and poor long-term operational stability during CO2 electroreduction.

Method used

By employing an electrothermal element between the cathode plate and the membrane electrode assembly, combined with a specific catalyst system, and using a cathode catalyst layer made of gallium/copper oxide electrode and perfluorosulfonic acid resin adhesive, along with an insulating and thermally conductive layer and a temperature sensor, precise temperature control of the reaction zone is achieved, avoiding heat transfer hysteresis and improving catalytic activity and stability.

Benefits of technology

This technology enables the cathode catalyst layer to quickly reach the optimal reaction temperature, reduces heat loss, improves the conversion efficiency of carbon dioxide to ethanol, extends the long-term service life of the membrane electrode assembly, avoids condensation and salting-out phenomena, and ensures the stability and high efficiency of the system.

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Abstract

This invention belongs to the field of electrocatalysis and discloses an electrocatalytic carbon dioxide reduction device, comprising: a cathode; a cathode plate; and a membrane electrode assembly including a cathode catalyst layer, an anode catalyst, and an ion-polymer membrane located between the two. The cathode catalyst layer is located on one side of the cathode plate, and the anode catalyst layer is located on the other side of the anode plate. The cathode catalyst layer includes a porous polymer plate and a gallium / copper oxide electrode loaded in the pores. The gallium / copper oxide electrode is prepared by adding a perfluorosulfonic acid resin binder to a gallium / copper oxide composite electrocatalyst and then heating and molding it. The heating element of the heating assembly is disposed between the cathode plate and the membrane electrode assembly. This invention achieves temperature control in the core reaction region by optimizing the design of the catalyst layer and the heating assembly, thereby increasing the current density of the catalytic reaction and the Faradaic efficiency of the target product. Simultaneously, it avoids electrode flooding and salting-out problems caused by low temperatures, significantly extending the system's operating life.
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