Gas diffusion electrode, preparation method thereof and application thereof in electrochemical reduction of carbon dioxide

Abstract

The invention relates to a gas diffusion electrode, a preparation method of the gas diffusion electrode, and the application of the gas diffusion electrode in electrochemical reduction of carbon dioxide. The gas diffusion electrode comprises a gas diffusion electrode body and carbon dioxide electrochemical reduction catalysts loaded on the gas diffusion electrode body. Nano copper oxide supportedon graphite phase carbon nitride serves as the carbon dioxide electrochemical reduction catalysts and has two crystal forms of tenorite and cuprit. The gas diffusion electrode can improve the Faradayefficiency of carbon dioxide electrochemical reduction products such as methane, ethylene and other hydrocarbons, and also can effectively inhibit hydrogen evolution reaction.

Description

technical field

[0001] The invention relates to the field of electrochemical catalysis, in particular to a gas diffusion electrode, its preparation method and its application in the electrochemical reduction of carbon dioxide. Background technique

[0002] Carbon dioxide electrochemical reduction is an important direction of carbon dioxide resource utilization technology, which can convert carbon dioxide into gaseous carbon monoxide, methane, ethylene, ethane, propylene, propane and liquid formic acid, methanol, formaldehyde, acetic acid, ethanol, ethane Aldehyde, ethylene glycol, oxalic acid and other substances produce economically valuable chemicals while slowing down the greenhouse effect brought by carbon dioxide. They have dual benefits of environment and economy, and have received extensive attention in recent years.

[0003] Carbon dioxide is the product of the highest oxidation stage of carbon. From the perspective of chemical change, it is in a stable state, close ...

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