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Catalyst as well as preparation method and application thereof

A catalyst and photocatalyst technology, applied in the field of materials, can solve the problems of high toxicity, flammability and safety hazards of CO gas, and achieve the effect of improving activity and stability, catalytic efficiency and catalytic stability

Active Publication Date: 2021-12-03
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the carbonylation process, CO is widely used as a source of C1. In order to increase the concentration of CO in the solution, traditional carbonylation reactions are generally carried out under high pressure and high temperature conditions. However, CO gas is highly toxic and flammable. , there is a great potential safety hazard in industrial production

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

[0065] The catalyst in this example comprises PCN-222 (Co) and PdCu bimetallic nanocluster, PCN-222 (Co) has channel, and in the channel of described PCN-222 (Co), load PdCu bimetallic nanocluster, the PdCu nanocluster The diameter is 1.3nm. PdCu bimetallic nanoclusters grow confinement in the pores of PCN-222(Co).

[0066] The preparation method of the catalyst in this example is:

[0067] Disperse 25mg of PCN-222(Co) into 10mL of n-hexane solvent, then add 10μL of copper palladium salt mixed aqueous solution, the copper palladium salt mixed aqueous solution is Cu(NO 3 ) 2 ·3H 2 O and K 2 PdCl 4 A mixed aqueous solution of which, Cu(NO 3 ) 2 ·3H 2 O and K 2 PdCl 4 The dosages are 0.5mg and 1.6mg respectively. Add 2mL sodium borohydride solution (concentration: 0.03mol / L) under magnetic stirring, and react in the sodium borohydride solution for 2h. PdCu nanoclusters grow in situ and encapsulate in the pores of PCN-222(Co). After the reaction, Centrifuge the resulti...

Embodiment 2

[0070] The catalyst in this example comprises PCN-222 (Co) and PdCu bimetallic nanocluster, PCN-222 (Co) has channel, and in the channel of described PCN-222 (Co), load PdCu bimetallic nanocluster, the PdCu nanocluster The diameter is 2nm. PdCu bimetallic nanoclusters grow confinement in the pores of PCN-222(Co).

[0071] The preparation method of the catalyst in this example is:

[0072] Disperse 25mg of PCN-222(Co) into 10mL of n-hexane solvent, then add 30μL of copper palladium salt mixed aqueous solution, copper palladium salt mixed aqueous solution is Cu(NO 3 ) 2 ·3H 2 O and K 2 PdCl 4 A mixed aqueous solution of which, Cu(NO 3 ) 2 ·3H 2 O and K 2 PdCl 4 The dosages are 1.0mg and 3.2mg respectively. Add 2mL sodium borohydride solution (0.05mol / L) under magnetic stirring, react in sodium borohydride solution for 2h, PdCu nanoclusters grow in situ and encapsulate in the pores of PCN-222(Co), after the reaction, the obtained The mixed solution was centrifuged at ...

Embodiment 3

[0074] The catalyst in this example comprises PCN-222 (Co) and PdCu bimetallic nanocluster, PCN-222 (Co) has channel, and in the channel of described PCN-222 (Co), load PdCu bimetallic nanocluster, the PdCu nanocluster The diameter is 3nm. PdCu bimetallic nanoclusters grow confinement in the pores of PCN-222(Co).

[0075] The preparation method of the catalyst in this example is:

[0076] Disperse 25mg of PCN-222(Co) into 10mL of n-hexane solvent, then add 50μL of copper palladium salt mixed aqueous solution, copper palladium salt mixed aqueous solution is Cu(NO 3 ) 2 ·3H 2 O and K 2 PdCl 4 A mixed aqueous solution of which, Cu(NO 3 ) 2 ·3H 2 O and K 2 PdCl 4 The dosages are 2.0mg and 6.4mg respectively. Add 2mL sodium borohydride solution (0.08mol / L) under magnetic stirring, react in sodium borohydride solution for 2h, PdCu nanoclusters grow in situ and encapsulate in the pores of PCN-222(Co), after the reaction, the obtained The mixed solution was centrifuged at ...

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Abstract

The invention discloses a catalyst as well as a preparation method and application thereof. The catalyst comprises a photoactive MOF and a bimetallic nano-cluster, the photoactive MOF is provided with a pore channel, and the bimetallic nano-cluster is loaded in the pore channel of the photoactive MOF. According to the catalyst disclosed by the invention, the bimetallic nano-cluster is combined with the photoactive MOF. According to the process, the characteristics of porosity, good crystallinity, multiple modifiable sites and the like of the photoactive MOF are fully utilized, and the bimetallic nano-cluster is limited and grown in a pore channel of the photoactive MOF, so that the activity and the stability of the catalyst can be improved, and the catalytic efficiency and the catalytic stability are further improved. According to the carbonylation reaction method, the bimetallic nano-cluster and the photoactive MOF are used as photocatalysts, and CO2 is used for replacing CO to serve as a C1 source, so that the carbonyl compound is synthesized in one step through photocatalysis. The method is mild in reaction condition, can realize catalysis at normal temperature and normal pressure, and is easy to operate and high in yield.

Description

technical field [0001] The invention relates to the field of materials, in particular to a catalyst and its preparation method and application. Background technique [0002] The carbonylation reaction greatly broadens the types of coupling reactions and is an effective method for introducing carbonyl groups, which is particularly important in organic synthesis. In the carbonylation process, CO is widely used as a source of C1. In order to increase the concentration of CO in the solution, traditional carbonylation reactions are generally carried out under high pressure and high temperature conditions. However, CO gas is highly toxic and flammable. , There is a great potential safety hazard in industrial production. Therefore, it is particularly important to find new non-toxic, safe and high-yield C1 sources for carbonylation reactions. In addition, from the perspective of sustainable development, it is of great application significance to replace traditional high-temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J23/89C07C45/00C07C49/786C07C49/784C07C49/813C07C253/30C07C255/56C07C49/84C07C67/30C07C69/708C07C49/796C07D333/22
CPCB01J31/1691B01J23/8926C07C45/00C07C253/30C07C67/30C07D333/22B01J2531/845B01J2531/025B01J2231/4211B01J2231/4266B01J35/393B01J35/23B01J35/39C07C49/786C07C49/784C07C49/813C07C255/56C07C49/84C07C69/708C07C49/796Y02P20/584
Inventor 张志明郭颂付闪闪姚爽鲁统部
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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