Preparation method of electrode used for CO2 electrochemical reduction reaction

Abstract

The invention relates to a preparation method of an electrode used for CO2 electrochemical reduction reaction. The electrode is prepared with foam copper, a copper wire mesh, a copper foil, a copper plate, a titanium wire mesh or a titanium plate as a substrate. The preparation method includes the steps of uniformly mixing a copper precursor solution being 0.01-2.0 M in concentrate and a template agent being 0.01-1.5 M in concentrate according to the molar ratio of 5:1-1:20 and magnetically stirring the solution for more than 30 min; moving the solution into a reaction kettle, immersing the substrate into the solution and performing a sealing reaction for 4-12 h; moving the substrate out from the reaction kettle, washing and drying the substrate, and performing thermal treatment to the substrate at 300-800 DEG C for 1-5 h under protection of an inert gas or an oxidizing atmosphere to obtain the substrate to which metal oxides are attached; and performing electrochemical reduction to the substrate to which metal oxides are attached in an acidic electrolyte to obtain the electrode. The preparation method is simple in preparation method and is suitable for large-scale production. The electrode is large in specific surface area and is high in CO2 oxygen reduction catalytic performance.

Description

technical field [0001] The invention relates to a preparation method of an electrode for electrochemical reduction of carbon dioxide, belonging to the field of resource utilization of carbon dioxide. Background technique [0002] Energy is an important material basis for national economic development and people's lives. At present, my country's economy and society are in a stage of rapid development, and the demand for energy continues to increase. The resulting CO 2 Gas "greenhouse effect" is also increasingly prominent. Therefore, how to effectively use CO 2 and reduce CO 2 Emissions have become a research hotspot in recent years. At present, people use a variety of methods to carry out CO 2 Chemical fixation and conversion, including catalytic hydrogenation, catalytic reforming, electrochemical or chemical reduction, to achieve CO 2 Activation synthesizes organic compounds or polymer compounds such as methane, methanol, and formic acid. In terms of energy consumpti...

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Problems solved by technology

However, studies have shown that carbon-based materials can not only increase the yield of its hydrogen evolution side reaction, but also carbon can poison the Cu electrode and reduce the life of the catalyst.

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