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Catalyst for preparing carbon monoxide by electrochemically reducing carbon dioxide and preparation method and application thereof

A carbon dioxide, carbon monoxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve safety problems, complex catalyst synthesis steps, unfavorable large-scale macroscale Preparation and other problems, to achieve good solubility and dispersibility, to achieve large-scale industrial production and application, to solve the effects of poisoning and pollution problems

Inactive Publication Date: 2019-08-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of the above two catalysts requires the use of toxic solvents such as amyl alcohol acetone, which has potential safety problems in large-scale applications.
The literature (Po Ling Cheung. et alChemistry of Materials 2019, 31, 1908-1919) reported a solvent-free synthesis of a covalent organic framework (COF) structure with porphyrin iron as a structural unit and used it for the electrochemical reduction of carbon dioxide. Under the voltage of -2.2V (vs.Ag / AgCl), the selectivity of carbon monoxide reaches 80%, but the synthesis steps of this type of catalyst are complicated, which is not conducive to large-scale macro-production

Method used

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  • Catalyst for preparing carbon monoxide by electrochemically reducing carbon dioxide and preparation method and application thereof
  • Catalyst for preparing carbon monoxide by electrochemically reducing carbon dioxide and preparation method and application thereof
  • Catalyst for preparing carbon monoxide by electrochemically reducing carbon dioxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this example, the preparation of CoPPc-CNT (10-20) catalyst is carried out, polymer layer: carbon tube mass: Co=1:1:0.16.

[0051] S1: Weigh 100 mg of carbon nanotubes with an outer diameter of 10-20 nm, place them in 80 ml of ethanol / water, and ultrasonically disperse them for 30 min to make them homogeneous. The power of the ultrasonic instrument is 53 kHz.

[0052] S2: Weigh 100mg of 2,4,5-benzenetetracarbonitrile and 86g of 1,8-diazabicyclo[5.4.0]undec-7-ene, weigh 27mg of anhydrous cobalt chloride, and mix the above Both were ultrasonically dispersed in ethanol / water containing carbon nanotubes.

[0053] S3: Transfer the dispersion containing the above precursor to a 100ml tetrafluoroethylene lining, place the lining in a stainless steel container, seal it and put it in an oven, and react at 180°C for 8h.

[0054] S4: After the reaction is completed, cool to room temperature, divide the mixed solution into centrifuge tubes, centrifuge at 8000 rpm, and then wash...

Embodiment 2

[0059] This example is the preparation of CoPPc-CNT(20-30)-1 catalyst, wherein polymer layer: carbon tube mass: Co=1:1:0.16.

[0060] S1: Weigh 100 mg of carbon nanotubes with an outer diameter of 20-30 nm, place them in 80 ml of ethanol / water, and ultrasonically disperse them for 30 min to make them homogeneous. The power of the ultrasonic instrument is 53 kHz.

[0061] S2: Weigh 100mg of 1,2,4,5-pyrene tetracarbonitrile and 86g of 1,8-diazabicyclo[5.4.0]undec-7-ene, and ultrasonically disperse 27mg of anhydrous cobalt chloride in the tube of ethanol / water.

[0062] S3: Transfer the dispersion containing the above precursor to a 100ml tetrafluoroethylene lining, place the lining in a stainless steel container, seal it and put it in an oven, and react at 180°C for 8h.

[0063] S4: After the reaction is completed, cool to room temperature, divide the mixed solution into centrifuge tubes, centrifuge at 8000 rpm, and wash twice with alcohol and water respectively. The amount of ...

Embodiment 3

[0070] This example is the preparation of CoPPc-CNT (30-50) catalyst, wherein polymer layer: carbon tube mass: Co = 1:1:0.16.

[0071] S1: Weigh 100 mg of carbon nanotubes with an outer diameter of 30-50 nm, place them in 80 ml of ethanol / water, and ultrasonically disperse them for 30 min to make them homogeneous. The power of the ultrasonic instrument is 53 kHz.

[0072] S2: Weigh 100mg of 1,2,4,5-pyrene tetracarbonitrile and 86g of 1,8-diazabicyclo[5.4.0]undec-7-ene, and ultrasonically disperse 27mg of anhydrous cobalt chloride in the tube of ethanol / water.

[0073] S3: Transfer the dispersion containing the above precursor to a 100ml tetrafluoroethylene lining, place the lining in a stainless steel container, seal it and put it in an oven, and react at 180°C for 8h.

[0074] S4: After the reaction is completed, cool to room temperature, divide the mixed solution into centrifuge tubes, centrifuge at 8000 rpm, and wash twice with alcohol and water respectively. The amount of...

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Abstract

The invention relates to a catalyst for preparing carbon monoxide by electrochemically reducing carbon dioxide, and the catalyst comprises a carbon material and a surface organic polymerization layer.The outer surface of the carbon material is coated with the surface organic polymer layer. A non-noble metal is distributed in the surface organic polymer layer. The mass ratio of the surface organicpolymer layer to the carbon nano material is 1: 0.5-1: 4, and the mass fraction of the non-noble metal in the catalyst is 1-10%. Compared with the prior art, a solvent (ethanol / water) used by the invention is more green and environment-friendly, and the preparation process is simpler; the synthesized catalyst has higher catalytic activity, selectivity and stability, provides a new idea for the electrocatalytic efficient conversion of the carbon dioxide, and has a better industrial prospect.

Description

technical field [0001] The invention relates to the fields of energy catalysis and electrochemistry, in particular to a catalyst for producing carbon monoxide by electrochemically reducing carbon dioxide, a preparation method and application thereof. Background technique [0002] Over the past few centuries, the utilization of carbon-rich fossil fuels such as coal, oil, and natural gas has ushered in an era of unprecedented prosperity and progress for human development. However, the concentration of carbon dioxide in the atmosphere is increasing year by year. With the increase of the concentration of carbon dioxide in the atmosphere, the problem of global warming caused by the greenhouse effect is becoming more and more serious. Even though the carbon dioxide emissions from power generation can be greatly reduced by shifting the energy structure to renewable energy (such as solar and wind energy) and coupling energy storage technologies, the large amount of carbon emissions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C25B1/00C25B11/06
CPCB01J31/183C25B1/00B01J2531/025B01J2531/845C25B11/051C25B11/057C25B11/095B01J35/33
Inventor 朱明辉韩一帆徐晶陈嘉成
Owner EAST CHINA UNIV OF SCI & TECH
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