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

A carbon dioxide and catalyst technology, which is applied in the field of carbon dioxide electrochemical reduction catalyst and its preparation, can solve the problems of poor electrical conductivity and limitation of tin dioxide, and achieve increased electrochemical reduction catalytic activity, enhanced selectivity, and easy operation Effect

Inactive Publication Date: 2020-06-05
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is prepared by a hydrothermal method, using stannous chloride dihydrate as a raw material to prepare flower-shaped tin dioxide nanoflowers, which improves the specific surface area of ​​the catalyst, but the poor conductivity of tin dioxide leads to its Restricted during restore

Method used

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

Examples

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Embodiment 1

[0028] 1. Synthesis of tetramethylguanidine lactate ionic liquid

[0029] (d) Take 5% ethanol solution of 1,1,3,3-tetramethylguanidine in an ice-water bath, and magnetically stir for 3 hours;

[0030] (e) adding the ethanol solution of lactic acid dropwise into a 5% ethanol solution of 1,1,3,3-tetramethylguanidine, and stirring in an ice-water bath for 5 hours;

[0031] (f) Stir for 24 hours; at a temperature of 60 degrees Celsius, use a rotary evaporator to rotate.

[0032] 2. Preparation of catalyst precursor

[0033] 34 mg of palladium chloride was dissolved in 7 ml of tetramethylguanidine lactate ionic liquid to obtain a mixed solution, which was heated in an oil bath at a temperature of 80 degrees Celsius to obtain a catalyst precursor.

[0034] 3. Preparation of carbon dioxide electrochemical reduction catalyst "pyramid" palladium nanoparticle catalyst

[0035] (d) Dissolve 60 mg of ascorbic acid and 105 mg of polyvinylpyrrolidone in 3 ml of tetramethylguanidine lacta...

Embodiment 2

[0040] 1. Synthesis of tetramethylguanidine lactate ionic liquid

[0041] (a) Take 5% ethanol solution of 1,1,3,3-tetramethylguanidine in an ice-water bath, and magnetically stir for 3 hours;

[0042] (b) adding the ethanol solution of lactic acid dropwise into a 5% ethanol solution of 1,1,3,3-tetramethylguanidine, and stirring in an ice-water bath for 6 hours;

[0043] (c) Stir for 30 hours; at a temperature of 60 degrees Celsius, use a rotary evaporator to rotate.

[0044] 2. Preparation of catalyst precursor

[0045] 34 mg of palladium chloride was dissolved in 9 ml of tetramethylguanidine lactate ionic liquid to obtain a mixed solution, which was heated in an oil bath at a temperature of 90 degrees Celsius to obtain a catalyst precursor.

[0046] 3. Preparation of carbon dioxide electrochemical reduction catalyst "pyramid" palladium nanoparticle catalyst

[0047] (d) Dissolve 60 mg of ascorbic acid and 105 mg of polyvinylpyrrolidone in 3 ml of tetramethylguanidine lacta...

Embodiment 3

[0052] 1. Synthesis of tetramethylguanidine lactate ionic liquid

[0053] (a) Take 5% ethanol solution of 1,1,3,3-tetramethylguanidine in an ice-water bath, and magnetically stir for 3 hours;

[0054] (b) adding the ethanol solution of lactic acid dropwise into a 5% ethanol solution of 1,1,3,3-tetramethylguanidine, and stirring in an ice-water bath for 5 hours;

[0055] (c) Stir for 36 hours; at a temperature of 60 degrees Celsius, use a rotary evaporator to rotate.

[0056] 2. Preparation of catalyst precursor

[0057] 34 mg of palladium chloride was dissolved in 8 ml of tetramethylguanidine lactate ionic liquid to obtain a mixed solution, which was heated in an oil bath at a temperature of 100 degrees Celsius to obtain a catalyst precursor.

[0058] 3. Preparation of carbon dioxide electrochemical reduction catalyst "pyramid" palladium nanoparticle catalyst

[0059] (d) Dissolve 60 mg of ascorbic acid and 105 mg of polyvinylpyrrolidone in 3 ml of tetramethylguanidine lactat...

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Abstract

The invention relates to a carbon dioxide electrochemical reduction catalyst and a preparation method thereof. The carbon dioxide electrochemical reduction catalyst is "pyramid" palladium nanoparticles, and the synthesis raw materials of the "pyramid" palladium nanoparticles include palladium chloride, 7-10mL tetramethylguanidine lactate ionic liquid, ascorbic acid, polyvinylpyrrolidone , The temperature range is kept within the range of 80-130 degrees Celsius. Applied to the electrochemical reduction of carbon dioxide. The samples were characterized by transmission electron microscopy and cyclic voltammetry curves. The invention significantly improves the specific surface area and electrical conductivity of the catalyst, increases the catalytic activity of the catalyst for the electrochemical reduction of carbon dioxide, effectively inhibits the hydrogen evolution reaction, and enhances the selectivity of formic acid as a product.

Description

technical field [0001] The invention relates to a carbon dioxide electrochemical reduction catalyst and a preparation method thereof, in particular to a "pyramid" palladium nanoparticle carbon dioxide electrochemical reduction catalyst combined with noble metals and a preparation method thereof. Background technique [0002] At present, the increase in greenhouse gas emissions has a great impact on the environment, especially carbon dioxide, which has affected the climate and the ecological environment. Although the government has taken many measures to control carbon dioxide emissions, there are still serious problems. The researchers found that electrochemical catalysis has a good effect on reducing the amount of carbon dioxide. Metal nanoparticles with controllable surface structure, high specific surface area, and electroactivity are ideal electrode materials for the electrochemical reduction of carbon dioxide. Electrochemical reduction of carbon dioxide has become part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44C25B3/04C25B11/06C25B3/25
CPCC25B11/04B01J23/44B01J35/0013B01J35/0033B01J35/006B01J35/026B01J37/16C25B3/25
Inventor 宁维坤梁梦男苗世顶张鹏霍明远
Owner JILIN UNIV
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