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Preparation of supported CuPd bimetallic catalyst and application of supported CuPd bimetallic catalyst in oxidative coupling reaction

A bimetallic catalyst, supported technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve the problem of low yield and high price of oxidative coupling reaction products. problems, to achieve good catalytic activity and stability, reduce dosage, and improve the effect of catalytic activity

Inactive Publication Date: 2021-08-31
HUANGSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a preparation of a supported CuPd bimetallic catalyst and its application in oxidative coupling reactions. The problem to be solved by the present invention is: the existing elemental metal catalyst Expensive and low product yields for oxidative coupling reactions

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  • Preparation of supported CuPd bimetallic catalyst and application of supported CuPd bimetallic catalyst in oxidative coupling reaction
  • Preparation of supported CuPd bimetallic catalyst and application of supported CuPd bimetallic catalyst in oxidative coupling reaction
  • Preparation of supported CuPd bimetallic catalyst and application of supported CuPd bimetallic catalyst in oxidative coupling reaction

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preparation example Construction

[0040] The preparation method of supported CuPd bimetallic catalyst of the present invention, comprises the steps:

[0041] S1: Take 0.015-0.020mol / L sodium chloropalladate (Na 2 PdCl 4 ), 0.015-0.020mol / L copper chloride (CuCl 2 2H 2 (2) solution joins in the round bottom flask A, and magnetic stirring makes sodium chloropalladate and cupric chloride completely uniformly mix, and solution is transparent reddish-brown;

[0042] S2: Add the pre-prepared graphene oxide (GO) and deionized water into the round bottom flask B, and sonicate it until the graphene oxide is completely dissolved in the deionized water, and the solution is muddy yellow;

[0043] S3: Add the graphene oxide aqueous solution in the round bottom flask B dropwise into the round bottom flask A, so that the graphene oxide aqueous solution is uniformly mixed with sodium chloropalladate and copper chloride solution;

[0044]S4: adjust the pH value of the mixed solution in the flask of step S3 to 8-9 with sodi...

Embodiment 1

[0049] S1: Take 10mL 0.017mol / L sodium chloropalladate (Na 2 PdCl 4 ), 10mL 0.017mol / L copper chloride (CuCl 2 2H 2 O) solution joins in the 100mL round-bottomed flask A, and magnetic stirring makes sodium chloropalladate and cupric chloride completely uniformly mix, and the solution is transparent reddish-brown.

[0050] S2: Add 10 mg of graphene oxide (GO) prepared in advance and 20 mL of deionized water into a 100 mL round-bottom flask B, and sonicate it for 2 h until graphene oxide is completely dissolved in deionized water, and the solution turns muddy yellow.

[0051] S3: Add the graphene oxide aqueous solution in round-bottom flask B to round-bottom flask A drop by drop, at a rate of about 60 drops per minute, ultrasonic treatment while adding, and continue ultrasonication for 1 hour after the addition to make graphene oxide The aqueous solution is uniformly mixed with sodium chloropalladate and copper chloride solution.

[0052] S4: Adjust the pH value of the mixed...

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Abstract

The invention discloses preparation of a supported CuPd bimetallic catalyst and application of the supported CuPd bimetallic catalyst in oxidative coupling reaction, and particularly relates to the field of supported metal catalysts. The invention comprises a method for preparing the supported CuPd bimetallic catalyst and application of the catalyst in oxidative coupling reaction of 2-phenylpyridine and benzyl alcohol. The method comprises the following steps: adding sodium chloropalladate and a copper chloride solution into a round-bottom flask A, and magnetically stirring to completely and uniformly mix the sodium chloropalladate and the copper chloride. Herein, the catalyst prepared by doping transition metal into single noble metal nanoparticles can effectively reduce the use amount of noble metal and the cost of the catalyst, and after the catalyst is recycled for five times, wherein the conversion rate is 85%, the selectivity is 95%, and the cyclic utilization rate is high; the catalyst also has relatively good catalytic activity and stability; in the oxidative coupling reaction, the operation is simple and convenient, the functional group tolerance is strong, the substrate applicability is wide, the selectivity is good, and the yield is higher.

Description

technical field [0001] The invention relates to the technical field of supported metal catalysts, more specifically, the invention relates to the preparation of a supported CuPd bimetallic catalyst and its application in oxidative coupling reactions. Background technique [0002] Coupling reaction (also known as coupled reaction), also written coupling reaction, coupling reaction, coupling reaction, coupling reaction. The coupling reaction is a 2A-B→A-A type reaction. It is a process in which an organic molecule is obtained by a certain chemical reaction between two organic chemical units. The coupling reaction in the narrow sense refers to the carbon-carbon bond formation reaction involving organometallic catalysts; the coupling reaction has many ways and is widely used in organic synthesis. In research, it is often necessary to increase the product yield by adding a catalyst. [0003] However, currently in the field of catalytic chemistry, precious metals such as gold (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07D213/50C07D221/10C07D231/12C07D409/08C07D409/10
CPCB01J23/8926C07D213/50C07D221/10C07D231/12C07D409/08C07D409/10Y02P20/584
Inventor 黄飞汪婧王溪溪孙金余黄珊黄昱方辉平李长江李凯王冰冰王馨肖思梦
Owner HUANGSHAN UNIV
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