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Catalyst as well as preparation method and application thereof

A catalyst and compound technology, applied in the field of catalyst and its preparation, can solve the problems of wide product distribution, catalyst deactivation, low product selectivity, etc., and achieve the effects of inhibiting corrosion, increasing CO2 concentration, and improving activity

Active Publication Date: 2021-10-22
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Cu can catalyze the reduction of CO2 to various small organic molecules with high economic added value, the products have a wide distribution and similar onset potentials, and the selectivity of a specific product is low.
For Cu-based catalysts, studies have shown that the active species is Cun+, but during electrochemical testing, Cun+ will become Cu0, lead to rapid catalyst deactivation

Method used

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  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] CB[6]-Cu with a particle size of 1 micron 2 The preparation method of O catalyst

[0072] (1) Mix 0.20g six-membered melon ring (CB[6]), 2g copper sulfate pentahydrate (CuSO 4 ·5H 2 O) Disperse in 50mL deionized water, ultrasonically disperse evenly, stir at room temperature for 0.5h, pass Cu 2+ and CB[6] self-assembled in water to form CB[6]-Cu 2+ .

[0073] (2) Slowly add 30mL NaOH (1M) aqueous solution to the mixture obtained in step (1), stir at room temperature (about 25°C) for 15min, and mix with CB[6]-Cu 2+ The reaction forms CB[6]-modified Cu(OH) 2 , namely CB[6]-Cu(OH) 2

[0074] (3) 1.2 g of glucose was quickly added to the mixture obtained in step (2), and reacted at 70° C. for 2.5 h.

[0075](4) After the reaction, it was naturally lowered to room temperature at 25°C. After centrifuging the obtained product, it was washed with deionized water for several times, and dried in an oven to obtain CB[6]-Cu with a particle size of 1 micron. 2 O low-dimensi...

Embodiment 2

[0078] CB[6]-Cu with a particle size of 7 microns 2 The preparation method of O catalyst

[0079] (1) Mix 0.20g CB[6], 1g CuSO 4 ·5H 2 O was dispersed in 25mL deionized water, ultrasonically dispersed, stirred at room temperature for 0.5h, passed through Cu 2+ and CB[6] self-assembled in water to form CB[6]-Cu 2+ .

[0080] (2) Slowly add 15 mL of NaOH (1M) aqueous solution to the mixture obtained in step (1), stir at room temperature (about 25°C) for 15 min, and mix with CB[6]-Cu 2+ The reaction forms CB[6]-modified Cu(OH) 2 , namely CB[6]-Cu(OH) 2

[0081] (3) 0.6 g of glucose was quickly added to the mixture obtained in step (2), and reacted at 100° C. for 2.5 h.

[0082] (4) After the reaction, it was naturally lowered to room temperature at 25°C, and the obtained product was centrifuged, washed several times with deionized water, and dried in an oven to obtain CB[6]-Cu with a particle size of 7 microns. 2 O low-dimensional materials.

[0083] figure 2 For the ...

Embodiment 3

[0085] CB[6]-Cu with a particle size of 10 nm 2 The preparation method of O catalyst

[0086] (1) Mix 0.025g six-membered melon ring (CB[6]), 0.06g copper nitrate hydrate (Cu(NO 3 ) 2 ·3H 2 O) Disperse in 20mL deionized water, ultrasonically disperse evenly, stir at room temperature for 0.5h, pass Cu 2+ and CB[6] self-assembled in water to form CB[6]-Cu 2 + .

[0087] (2) Slowly add 1mL NaOH (1M) aqueous solution to the mixture obtained in step (1), stir at room temperature (about 25°C) for 5min, and mix with CB[6]-Cu 2+ The reaction forms CB[6]-modified Cu(OH) 2 , namely CB[6]-Cu(OH) 2

[0088] (3) 0.05 g of glucose was quickly added to the mixture obtained in step (2), and reacted at 100° C. for 6 h.

[0089] (4) After the reaction, it was naturally lowered to room temperature at 25°C, and the obtained product was centrifuged, washed with deionized water for several times, and dried in an oven to obtain CB[6]-Cu with a particle size of 10 nm. 2 O low-dimensional m...

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Abstract

The invention discloses a catalyst and a preparation method. The catalyst comprises cucurbituril and Cu2O, and the Cu2O is coated with the cucurbituril. CB [n]-Cu2O low-dimensional materials with different sizes and different cucurbituril modification layer thicknesses can be obtained by adjusting the concentration of metal precursor salt and the amount of the cucurbituril. The method has the advantages of being simple in synthesis, convenient to operate, wide in application range and the like, preparation conditions are mild, the method is simple, and special equipment is not needed.

Description

technical field [0001] The application belongs to the fields of environmental protection and low-dimensional material synthesis, and specifically relates to a catalyst and its preparation method and application. Background technique [0002] In recent years, with the large-scale industrial development, fossil fuels (coal, oil, natural gas, etc.) Life. The burning of fossil fuels, which converts carbon into carbon dioxide (CO 2 ) into the atmosphere, increasing the concentration of carbon dioxide in the atmosphere. As a greenhouse gas, carbon dioxide will aggravate the greenhouse effect, leading to a series of problems such as global warming, melting glaciers, and rising sea levels. In response to this problem, the goal of reducing carbon emissions and achieving carbon neutrality is proposed. What humans can do is to develop renewable energy and low-carbon clean technologies to reduce carbon dioxide emissions. [0003] A very promising approach is to use renewable electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/095C25B3/26
CPCC25B11/095C25B3/26Y02P20/133
Inventor 曹荣王慧敏曹敏纳
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI