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Preparation method of a three-dimensional reduced graphene oxide-supported nano-pd hydrogenation catalyst

A hydrogenation catalyst, graphene technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low recycling rate, lamellar stacking, etc. problem, to achieve the effect of good catalytic activity and reusability

Active Publication Date: 2019-01-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a relatively simple, clean and low-cost method for preparing highly dispersed Pd nanoparticles / three-dimensional Method for reducing graphene oxide hydrogenation catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 0.04g of graphite oxide into 80mL of deionized water, and ultrasonically treat it with 180W ultrasonic frequency at room temperature for 1.5h. After ultrasonication, add 0.5mL of 0.02mol / L PdCl to the solution. 2 The solution and 80 mg of ascorbic acid were sonicated at 180 W for 5 min, heated in a water bath at 90 °C for 1.5 h, centrifuged after the reaction, washed 5 times with deionized water, and vacuum dried at 50 °C for 2 h to obtain the catalyst A.

Embodiment 2

[0018] Weigh 0.04g of graphite oxide into 40mL of deionized water, and ultrasonically treat it. The ultrasonic frequency is 180W, and the room temperature is ultrasonicated for 1.5h. After the ultrasonication is completed, 0.5mL of 0.02mol / L PdCl is added to the solution. 2 The solution and 60 mg of ascorbic acid were sonicated at 180 W for 5 min, heated in a water bath at 90 °C for 1.5 h, centrifuged after the reaction, washed 5 times with deionized water, and vacuum dried at 50 °C for 2 h to obtain the catalyst B.

Embodiment 3

[0020] Weigh 0.04g of graphite oxide into 20mL of deionized water, and ultrasonically treat it. The ultrasonic frequency is 180W, and the room temperature is ultrasonicated for 1.5h. After the ultrasonication is completed, 0.5mL of 0.02mol / L PdCl is added to the solution. 2 The solution and 80 mg of ascorbic acid were sonicated at 180 W for 5 min, heated in a water bath at 90 °C for 1.5 h, centrifuged after the reaction, washed 5 times with deionized water, and vacuum dried at 50 °C for 2 h to obtain the catalyst C.

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Abstract

The invention relates to a preparation method of a nano-Pd hydrogenation catalyst loaded with three-dimensional reduction graphene oxide. The preparation method comprises the steps that a certain amount of PdCl2 and ascorbic acid are added into an aqueous solution of graphene oxide by taking the graphene oxide as a carrier precursor, Pd is uniformly deposited on the generated three-dimensional reduction graphene oxide through a one-step hydrothermal method, and then high-dispersity loaded nano-Pd particles are prepared. By applying the catalyst to a hydrogenation reaction of olefin, the very high catalytic activity and stability are achieved, and the high recycling rate is achieved; the catalyst is mild in preparation condition, simple in process and low in cost, and industrialized production is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of noble metal hydrogenation catalyst and preparation thereof, in particular to a preparation method of a three-dimensional reduced graphene oxide-supported nano-Pd hydrogenation catalyst. Background technique [0002] Hydrogenation is one of the most important reactions in industrial catalysis. The catalysts currently used for this reaction are mainly noble metals such as Pd and Pt. Nano-metal catalysts, especially nano-Pd, occupy an important position in the field of heterogeneous catalysis due to their excellent catalytic activity and selectivity. Nano-Pd is easy to agglomerate, difficult to exist stably, and difficult to recycle. It is a more effective way to disperse nano-Pd through a carrier, and use the force between the carrier and Pd to prevent the agglomeration of nanoparticles and increase the recovery rate. The main carriers currently studied are: Al 2 O 3 , SiO 2 , activated carbon, molecu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44
CPCB01J23/44
Inventor 刘平陈炎亮李永昕薛冰
Owner CHANGZHOU UNIV