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An electrocatalytic reduction of CO in a heteropolyacid ionic liquid-indium dual catalyst system 2 Process for the preparation of ethanol acetic acid

An ionic liquid, CO2 technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of inability to achieve deep reduction of CO2, complicated preparation process of ionic liquids, etc., and achieve excellent electrochemical oxidation. Reduction activity, inhibition of hydrogen evolution side reaction, high conductivity effect

Active Publication Date: 2021-10-08
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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  • An electrocatalytic reduction of CO in a heteropolyacid ionic liquid-indium dual catalyst system <sub>2</sub> Process for the preparation of ethanol acetic acid
  • An electrocatalytic reduction of CO in a heteropolyacid ionic liquid-indium dual catalyst system <sub>2</sub> Process for the preparation of ethanol acetic acid
  • An electrocatalytic reduction of CO in a heteropolyacid ionic liquid-indium dual catalyst system <sub>2</sub> Process for the preparation of ethanol acetic acid

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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 metavanadate 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, the ionic liquid precursor (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 wherein said sodi...

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Abstract

An Electrocatalytic Reduction of CO in a Heteropolyacid Ionic Liquid-Indium Dual Catalyst System 2 Process for the preparation of ethanol acetic acid. The invention belongs to electrocatalytic reduction of CO 2 Preparation of ethanol acetic acid fields. The purpose of the invention is in order to solve existing reduction 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. The present invention prepares polyoxometalate ionic liquid (n-Bu 4 N) 3 SVW 11 o 40 , after dissolving it in acetonitrile as catholyte, using dilute sulfuric acid as anolyte to electrocatalytically reduce carbon dioxide to prepare ≥C 1 The liquid phase products are ethanol and acetic acid. The method of the present invention is simple, effectively solves the problem that the existing multi-acid ionic liquids are rare and in short supply, and the reaction conditions are mild, the economic cost is low, the energy efficiency can be increased to 4 to 5 times, and the obtained ethanol Faradaic efficiency is 7% to 7%. 16%, and the faradaic efficiency of acetic acid is 14% to 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 Patents(China)
IPC IPC(8): C25B3/26C25B3/07C25B11/085B01J31/02B01J31/16
CPCB01J27/02B01J27/188B01J31/0279C25B11/04
Inventor 李春香孙文聪
Owner HARBIN INST OF TECH
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