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A kind of carbon dioxide electrochemical reduction catalyst and preparation method thereof

A carbon dioxide and catalyst technology, applied in the field of carbon dioxide electrochemical reduction catalyst and its preparation, can solve the problems of poor catalyst stability, low current efficiency, and low selectivity of target products, achieve high electrocatalytic activity and selectivity, and increase contact ratio Surface area, effect of increasing Faradaic efficiency

Active Publication Date: 2022-04-26
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon dioxide is the most stable oxidation state of carbon, and requires high energy to be activated and then reduced, making the chemical conversion reaction conditions of carbon dioxide harsh
Electrocatalyst is the key to realize the electrocatalytic reduction of carbon dioxide. At present, the choice of electrode materials is mostly concentrated in noble metals or transition metals with high prices, which greatly increases the cost of catalysts. At the same time, the electrocatalytic process also has poor catalyst stability and the target product Therefore, it is of great research significance to prepare efficient and cheap carbon dioxide electrochemical reduction catalysts.

Method used

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  • A kind of carbon dioxide electrochemical reduction catalyst and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of the carbon dioxide electrochemical reduction catalyst is characterized in that it comprises the following steps:

[0020] (1) Synthesis of polystyrene microspheres: First, add 80 mL of styrene monomer and 8 mL of acrylic acid into 400 mL of distilled water, stir and disperse, then use a water bath to heat the temperature of the reaction system to 60°C; then pass nitrogen gas for 30 minutes to remove the Then add 15mL of potassium persulfate aqueous solution with a concentration of 40mmol / L, and continue to react for 18h under the stirring condition of 250r / min to obtain an emulsion; after the obtained emulsion is centrifuged, the centrifuged product is washed with ethanol for 3 times, and then vacuum freeze-dried Freeze-dry the polystyrene microspheres under the condition of 20Pa, -40℃, and set aside;

[0021] (2) Synthesis of copper oxide hollow microspheres: take 2 g of copper sulfate, 0.3 g of sodium hydroxide and 1.5 g of polystyrene micros...

Embodiment 2

[0024] The preparation method of the carbon dioxide electrochemical reduction catalyst is characterized in that it comprises the following steps:

[0025] (1) Synthesis of polystyrene microspheres: First, add 50 mL of styrene monomer and 5 mL of acrylic acid into 300 mL of distilled water, stir and disperse, then use a water bath to heat the temperature of the reaction system to 50°C; then pass nitrogen gas for 20 minutes to remove the Then add 10mL of potassium persulfate aqueous solution with a concentration of 30mmol / L, and continue to react for 10h under the stirring condition of 200r / min to obtain an emulsion; after centrifuging the obtained emulsion, wash the centrifuged product with ethanol for 3 times, and then use vacuum freeze-drying Freeze-dry the polystyrene microspheres under the condition of 20Pa, -40℃, and set aside;

[0026] (2) Synthesis of copper oxide hollow microspheres: take 1g of copper sulfate, 0.1g of sodium hydroxide and 1g of polystyrene microspheres ...

Embodiment 3

[0029] The preparation method of the carbon dioxide electrochemical reduction catalyst is characterized in that it comprises the following steps:

[0030] (1) Synthesis of polystyrene microspheres: First, add 100 mL of styrene monomer and 10 mL of acrylic acid into 500 mL of distilled water, stir and disperse, then use a water bath to heat the temperature of the reaction system to 70°C; then pass nitrogen gas for 40 minutes to remove the Then add 25mL of potassium persulfate aqueous solution with a concentration of 50mmol / L, and continue to react for 24h under the stirring condition of 300r / min to obtain an emulsion; after the obtained emulsion is centrifuged, the centrifuged product is washed with ethanol for 3 times, and then vacuum freeze-dried Freeze-dry the polystyrene microspheres under the condition of 20Pa, -40℃, and set aside;

[0031] (2) Synthesis of copper oxide hollow microspheres: take 3 g of copper sulfate, 0.5 g of sodium hydroxide and 2 g of polystyrene micros...

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Abstract

The invention belongs to the technical field of carbon dioxide electrochemical reduction, and in particular relates to a carbon dioxide electrochemical reduction catalyst and a preparation method thereof. The catalyst is copper selenide hollow microspheres. The catalyst has both high electrocatalytic activity and selectivity for carbon dioxide reduction, and can significantly improve the energy efficiency of carbon dioxide utilization.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide electrochemical reduction, and in particular relates to a carbon dioxide electrochemical reduction catalyst and a preparation method thereof. Background technique [0002] The resource utilization of carbon dioxide can not only greatly reduce greenhouse gas emissions, reduce the serious impact of the greenhouse effect, but also obtain products with high industrial added value. Carbon dioxide is the most stable oxidation state of carbon, and requires high energy to be activated and then reduced, making the chemical conversion reaction conditions of carbon dioxide harsh. The electrocatalytic reduction of carbon dioxide has mild reaction conditions. While effectively reducing the activation energy of the carbon dioxide reaction, it also has the advantages of controllable reaction conversion degree, adjustable product selectivity, green raw materials and products, and no pollution. It provides ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057B01J35/08C25B3/07C25B3/26C25B11/091
CPCB01J27/0573C25B11/04C25B3/25B01J35/33B01J35/51B01J35/61Y02P20/10
Inventor 钊妍王加义
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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