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

An ionic liquid, ethanol acetic acid technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of complex preparation process of ionic liquids, inability to achieve deep reduction of CO2, etc., and achieve excellent electrochemical performance. Redox activity, inhibition of hydrogen evolution side reaction, simple effect

Active Publication Date: 2020-12-29
HARBIN INST OF TECH
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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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  • Method for preparing glycolic acid by electrocatalytic reduction of CO2 in heteropolyacid ionic liquid-indium dual-catalytic system
  • Method for preparing glycolic acid by electrocatalytic reduction of CO2 in heteropolyacid ionic liquid-indium dual-catalytic system
  • Method for preparing glycolic acid by electrocatalytic reduction of CO2 in heteropolyacid ionic liquid-indium dual-catalytic system

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specific Embodiment approach 1

[0039] Specific implementation mode 1: An electrocatalytic reduction of CO in a heteropolyacid ionic liquid-indium dual catalytic system according to this embodiment 2 The method for preparing ethanol acetic acid is carried out as follows:

[0040] 1. Preparation of polyoxometalate ionic liquid: ①Add 34mL deionized water, 38mL acetonitrile, 2mL concentrated sulfuric acid, 1.5mL sodium metabirate aqueous solution and 1.2369g sodium tungstate to the hydrothermal reaction kettle in sequence, stir and mix After 2h, hydrothermally reacted at 70°C for 24h in a blast drying oven, cooled to room temperature after the reaction was completed, and then added 0.75g of (n-Bu 4 N) Br was stirred for 2 h, filtered, washed with deionized water and ethanol in turn, and air-dried to obtain an orange powder, which was the precursor of the ionic liquid (n-Bu 4 N) 4 SV 2 W 10 o 40 ; The ratio of the quality of sodium metavanadate and the volume of deionized water in the aqueous solution of wh...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/04C25B11/06B01J31/02B01J31/16
CPCB01J27/02B01J27/188B01J31/0279C25B11/04
Inventor 李春香孙文聪
Owner HARBIN INST OF TECH
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