Carbon dioxide electroreduction catalyst with high formic acid selectivity and preparation method thereof

A carbon dioxide and catalyst technology, applied in the field of carbon dioxide electroreduction catalyst and its preparation, can solve the problems of poor selectivity, small potential window, high overpotential, etc., and achieve the effect of reducing energy consumption and simple process

Active Publication Date: 2022-01-28
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems of poor selectivity, high overpotential and small potential window in the electroreduction of carbon dioxide into formic acid in the prior art, the present invention provides a carbon dioxide electroreduction catalyst with ultra-high formic acid selectivity and a preparation method thereof

Method used

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  • Carbon dioxide electroreduction catalyst with high formic acid selectivity and preparation method thereof
  • Carbon dioxide electroreduction catalyst with high formic acid selectivity and preparation method thereof
  • Carbon dioxide electroreduction catalyst with high formic acid selectivity and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0056] (1) Preparation of template precursor: 0.0783g (0.24mmol) potassium tetrachloropalladate was dissolved in 12mL water, 0.01g (0.06mmol) copper chloride dihydrate was dissolved in 3mL water, then the two were mixed evenly, and Add 15mL (0.83mol) of water and 200mg (0.015mmol) of polyether F127 (molecular weight is about 13300), and stir at 1000rpm for 30min to completely dissolve the polyether F127.

[0057] (2) Preparation of reducing agent: 0.309 g (1.75 mmol) of ascorbic acid was dissolved in 17.5 mL (0.97 mol) of water to obtain an S2 solution.

[0058] (3) Synthesis of palladium-copper alloy: under the condition of 95° C. in an oil bath, the above-mentioned S2 solution was added dropwise to the S1 solution, and reacted for 3 hours. After the reaction was completed, the product was collected by centrifugation (the centrifugal speed was 9000r / min, and the time was 6min). And washed three times with a mixed solution of ethanol and water with a volume ratio of 3:2 (ethan...

Embodiment 2

[0060] (1) Preparation of template precursor: Dissolve 0.0588g (0.18mmol) potassium tetrachloropalladate in 9mL water, 0.02g (0.12mmol) copper chloride dihydrate in 6mL water, then mix the two evenly, and add Add 15mL of water and 200mg of polyether F127 (molecular weight is about 13300), and stir at 1000rpm for 30min to completely dissolve the polyether F127, which is the S1 solution, ready for use.

[0061] (2) Preparation of reducing agent: 0.309g of ascorbic acid was dissolved in 17.5mL of water to obtain S2 solution.

[0062] (3) Synthesis of palladium-copper alloy: under the condition of 95° C. in an oil bath, the above-mentioned S2 solution was added dropwise to the S1 solution, and reacted for 3 hours. After the reaction was completed, the product was collected by centrifugation (the centrifugal speed was 9000r / min, and the time was 6min). And washed three times with a mixed solution of ethanol and water with a volume ratio of 3:2 (ethanol 15mL, water 10mL), and the wa...

Embodiment 3

[0064] (1) Preparation of template precursor: 0.049g (0.15mmol) potassium tetrachloropalladate was dissolved in 7.5mL water, 0.0256g (0.15mmol) copper chloride dihydrate was dissolved in 7.5mL water, and then the two were mixed evenly, Add 15mL of water and 200mg of polyether F127 (molecular weight is about 13300) to it, stir at 1000rpm for 30min to completely dissolve the polyether F127, and obtain the S1 solution for use.

[0065] (2) Preparation of reducing agent: 0.309g of ascorbic acid was dissolved in 17.5mL of water to obtain S2 solution.

[0066] (3) Synthesis of palladium-copper alloy: under the condition of 95° C. in an oil bath, the above-mentioned S2 solution was added dropwise to the S1 solution, and reacted for 3 hours. After the reaction was completed, the product was collected by centrifugation (the centrifugal speed was 9000r / min, and the time was 6min). And washed three times with a mixed solution of ethanol and water with a volume ratio of 3:2 (ethanol 15mL,...

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Abstract

The invention provides a carbon dioxide electroreduction catalyst with high formic acid selectivity and a preparation method thereof, the carbon dioxide electroreduction catalyst is a binary metal alloy composed of palladium and copper, the molecular formula of the carbon dioxide electroreduction catalyst is PdxCuy, x is more than or equal to 0.1 and less than or equal to 0.95, and x + y is equal to 1. The preparation method comprises the following steps: respectively dissolving palladium salt and copper salt in water, and mixing to obtain a precursor solution; and dissolving a reducing agent in water, mixing with the precursor solution, carrying out a co-reduction reaction, and after the reaction is finished, carrying out post-treatment to obtain the carbon dioxide electroreduction catalyst. The carbon dioxide electroreduction catalyst provided by the invention has ultrahigh selectivity for reducing CO2 into formic acid, the high selectivity occurs at a lower overpotential, a wider potential window can be maintained, and the energy consumption in the process of electrocatalytically reducing carbon dioxide into formic acid and the harsh degree of reaction conditions are reduced. The preparation method has the advantages of being simple in process, easy to control, harmless to the environment and the like.

Description

technical field [0001] The invention belongs to the cross-technical field of new energy chemistry and electrocatalysis, and specifically relates to a carbon dioxide electroreduction catalyst with high formic acid selectivity and a preparation method thereof. Background technique [0002] At this stage, the excessive combustion of fossil fuels has led to a large amount of greenhouse gas emissions, which has caused global warming and melting glaciers, posing a great threat to the living environment of human beings. In order to solve this energy pollution problem, electrocatalytic carbon dioxide reduction technology has gradually entered the human field of vision. Electrocatalytic CO 2 Reduction, as an artificial carbon cycle method, can not only improve the environment, but also provide a new type of energy conversion method, that is, the use of renewable energy such as wind energy, solar energy, tidal energy, geothermal energy, etc. to electrically reduce carbon dioxide to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/07C25B3/26B22F9/24B22F1/054C25B11/052C25B11/089C22C5/04B82Y30/00B82Y40/00
CPCB22F9/24C22C5/04B82Y30/00B82Y40/00Y02E60/50
Inventor 刘晓静孙乙丹陈宇辉刘芳章舒康
Owner NANJING UNIV OF TECH
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