Method for preparing glycolic acid by electrocatalytic reduction of CO2 in heteropolyacid ionic liquid-indium dual-catalytic system

Abstract

The invention relates to a method for preparing glycolic acid by electrocatalytic reduction of CO2 in a heteropolyacid ionic liquid indium dual-catalytic system. The invention belongs to the field ofpreparation of glycolic acid by electrocatalytic reduction of CO2. The invention aims to solve the technical problems that the existing CO2 reduction reaction is generally 2e-, 4e- transfer reaction,the deep reduction of CO2 cannot be realized, and the ionic liquid preparation process of the existing reaction system is complex. The method comprises the following steps: preparing polyoxometallateionic liquid (n-Bu4N) 3SVW11O40, dissolving the polyoxometallate ionic liquid (n-Bu4N) 3SVW11O40 in acetonitrile to obtain a catholyte, and carrying out electrocatalytic reduction on carbon dioxide byusing dilute sulfuric acid as an anolyte to prepare liquid-phase products ethanol and acetic acid which are greater than or equal to C1. The method provided by the invention is simple, effectively solves the problems that the existing polyacid ionic liquid is rare in variety and short in quantity, is mild in reaction condition and low in economic cost, and can improve the energy efficiency to 4-5times, and the Faraday efficiency of the obtained ethanol is 7-16%, and the Faraday efficiency of the obtained acetic acid is 14-67%.

Description

technical field [0001] The invention belongs to electrocatalytic reduction of CO 2 The field of preparation of ethanol acetic acid, specifically relates to an electrocatalytic reduction of CO in a heteropolyacid ionic liquid-indium dual catalytic system 2 Process for the preparation of ethanol acetic acid. Background technique [0002] CO 2 As the highest valence state of carbon element, its reduction into various high value-added chemicals has attracted worldwide attention. Currently realized CO 2 Reduction methods include photocatalysis, thermal catalysis, catalytic hydrogenation, and electrocatalysis. Among them, the electrocatalytic CO 2 Reduction is more popular because it is easy to control the reaction conditions, easy to operate and can realize artificially closed carbon cycle. The current electrocatalytic CO 2 Reduction has emerged as a sustainable and economical way to remove atmospheric CO 2 Efficient strategy for conversion to fuels and chemicals, but ele...

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Problems solved by technology

[0004] The purpose of the invention is to solve the problem of existing reduction of CO 2 The response is generally 2e - 、4e - transfer reaction, unable to achieve CO 2 deep reduction, and the complex technical problems of the ionic liquid preparation process of the existing reaction system, and provide an electrocatalytic reduction of CO under the heteropolyacid ionic liquid-indium dual catalytic system 2 Process for the preparation of ethanol acetic acid

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