A co 2 electrochemical reduction method

Abstract

The invention provides a CO2 electrochemical reduction method with an Ag-containing electrode as a working electrode and relates to a CO2 electrochemical reduction method. The CO2 electrochemical reduction method with the Ag electrode as the working electrode is used for solving the problem of low product efficiency of the existing CO2 electrochemical reduction method. The method comprises the following steps: 1, mixing an ionic liquid with ultrapure water to obtain an electrolyte; 2, assembling an apparatus; and 3, performing CO2 electrochemical reduction, namely completing the CO2 electrochemical reduction with the Ag-containing electrode as the working electrode. The CO2 electrochemical reduction method has the advantages that 1, the Ag-containing electrode is taken as the working electrode and the reduction performance is stable, 2, the ionic liquid is mixed with the ultrapure water to obtain the electrolyte, and in combination with taking the Ag-containing electrode as the working electrode, the generation of CO is promoted in a cathode region, and therefore, the product efficiency is greatly improved, and 3, a cathode tank is separated from an anode tank by use of an ion exchange membrane, and consequently, oxygen generated in an anode region is prevented from going into the cathode region to produce negative effects on the reduction reaction. The method is mainly applied to CO2 electrochemical reduction.

Description

technical field [0001] The present invention relates to a CO 2 Electrochemical reduction method. Background technique [0002] At present, global warming caused by carbon dioxide has become one of the most concerned environmental issues in the world. The energy structure is in a critical period of transition from high-carbon utilization to low-carbon utilization, and the concept of environmental protection is gradually being accepted by the general public. In order to reduce the carbon dioxide content in the atmosphere, vigorously developing low-carbon technologies and recycling carbon dioxide through various technical means are the most effective methods. Due to the chemical properties of carbon dioxide are stable and not easy to be activated, currently three methods are mainly used: catalytic hydrogenation, catalytic reforming and electrochemical reduction. However, the traditional catalytic hydrogenation and catalytic reforming methods must be carried out under high te...

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Problems solved by technology

[0004] The purpose of the invention is to solve the existing CO 2 The electrochemical reduction method has the problems of low reduction current density, small amount of reduction products, and low Faradaic efficiency, and a CO 2 electrochemical reduction method

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