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Preparation and application of carbon dioxide electrochemical reduction catalyst

A carbon dioxide, carbon-based catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of metal atom agglomeration, catalyst performance degradation, etc. Effect

Inactive Publication Date: 2021-05-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when single-atom catalysts are synthesized by general wet chemical methods, there is a common problem that high-temperature calcinations cause metal atoms to agglomerate, which leads to a significant decrease in catalyst performance.

Method used

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  • Preparation and application of carbon dioxide electrochemical reduction catalyst
  • Preparation and application of carbon dioxide electrochemical reduction catalyst
  • Preparation and application of carbon dioxide electrochemical reduction catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Add solution A: 2.55ml ethyl orthosilicate into 45ml ethanol and stir; add solution B: 6ml 25% ammonia water and 9ml water into 30ml ethanol and stir. Add solution A into solution B and stir for 1 hour; pour solution B into the reaction kettle for hydrothermal treatment at 100°C for 24 hours, rinse the product after hydroheating with distilled water for more than three times, then dry it at 70°C for 8 hours, take the dried sample for 600°C Argon high-temperature calcination for 3h, heating rate 2 ℃ / min. Add 3g of the calcined product to 40ml (20%) hydrofluoric acid solution and etch for 24h, and finally obtain a hollow carbon sphere support rich in microporous structure.

[0037] 2) Add 0.1g of hollow carbon sphere carrier, 50mg of nickel chloride and 0.6g of melamine into 20ml of ethanol solution, stir at 25°C for 12h, evaporate to dryness in a water bath at 80°C, and then dry for 12h;

[0038] 3) The dried sample was calcined in argon at 1000°C for 1h at a heati...

Embodiment 2

[0044] 1) Add solution A: 2.55ml ethyl orthosilicate into 45ml ethanol and stir; add solution B: 6ml 25% ammonia water and 9ml water into 30ml ethanol and stir. Add solution A into solution B and stir for 1 hour; pour solution B into the reaction kettle for hydrothermal treatment at 100°C for 24 hours, rinse the product after hydroheating with distilled water for more than three times, then dry it at 70°C for 8 hours, take the dried sample for 600°C Argon high-temperature calcination for 3h, heating rate 2 ℃ / min. Add 3g of the calcined product to 40ml (20%) hydrofluoric acid solution and etch for 24h, and finally obtain a hollow carbon sphere support rich in microporous structure.

[0045] 2) Add 0.1g of hollow carbon sphere carrier, 50mg of nickel chloride and 0.6g of melamine into 20ml of ethanol solution, stir at 25°C for 12h, evaporate to dryness in a water bath at 80°C, and then dry for 12h;

[0046] 3) The dried sample was calcined in argon at 900°C for 1h, the heatin...

Embodiment 3

[0049] 1) Add solution A: 2.55ml ethyl orthosilicate into 45ml ethanol and stir; add solution B: 6ml 25% ammonia water and 9ml water into 30ml ethanol and stir. Add solution A into solution B and stir for 1 hour; pour solution B into the reaction kettle for hydrothermal treatment at 100°C for 24 hours, rinse the product after hydroheating with distilled water for more than three times, then dry it at 70°C for 8 hours, take the dried sample for 600°C Argon high-temperature calcination for 3h, heating rate 2 ℃ / min. Add 3g of the calcined product to 40ml (20%) hydrofluoric acid solution and etch for 24h, and finally obtain a hollow carbon sphere support rich in microporous structure.

[0050] 2) Add 0.1g of hollow carbon sphere carrier, 25mg of nickel chloride and 0.6g of melamine into 20ml of ethanol solution, stir at 25°C for 12h, evaporate to dryness in a water bath at 80°C, and then dry for 12h;

[0051] 3) The dried sample was calcined in argon at 1000°C for 1h at a heati...

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Abstract

The invention relates to preparation and application of a carbon dioxide electrochemical reduction catalyst. The preparation method of the catalyst comprises the following steps of by taking carbon spheres rich in microporous structures as a precursor, limiting adsorbed transition metal ions into a pore structure of the carbon spheres by utilizing the microporous structures of the carbon spheres through a liquid-phase impregnation process, and introducing a nitrogen source into later-stage high-temperature calcination carbonization treatment, generating a nitrogen-rich sheet structure at a high temperature to further anchor the transition metal monatomic. Therefore, the high-dispersion and high-load monatomic catalyst is prepared. The preparation method of the catalyst provided by the invention is simple / easy to control, has excellent Faraday efficiency, catalytic activity and stability for preparing CO through CO2 electrochemical reduction, and is expected to realize large-scale commercial production.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide electrochemical reduction, in particular to the preparation and application of a single-atom catalyst for carbon dioxide electrochemical reduction. Background technique [0002] At present, my country's economy and society are in a stage of rapid development, and the demand for energy is increasing day by day, which brings serious carbon dioxide emission problems. According to the latest report of the International Energy Agency (IEA), the global CO 2 Emissions amounted to 41 billion tons, a 2% increase from 2016. Therefore, how to reduce CO 2 emissions, effective use of CO 2 It has become a research hotspot in recent years. [0003] CO 2 The transformation and utilization of carbon dioxide mainly include the following four categories: chemical transformation, biochemical transformation, photochemical transformation and electrochemical transformation. with other COs 2 Conversion tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/02B01J37/08B01J35/10C25B1/01C25B1/50C25B11/091
CPCB01J27/24B01J37/0201B01J37/082C25B1/00B01J35/33B01J35/643B01J35/615
Inventor 李先锋姚鹏飞邱艳玲郑琼张华民阎景旺
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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