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Metal/graphene catalyst and preparation method thereof

A graphene and catalyst technology, applied in the field of graphene-supported metal nanoparticle catalyst and preparation, can solve the problem of no simple and easy preparation method of supported catalyst, and achieve high catalytic activity and stability, controllable size, and uniform distribution. Effect

Inactive Publication Date: 2013-08-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the current preparation technology of graphene-supported transition metal nanoparticle composites, there is no simple and easy method for preparing supported catalysts that can control the size of metal particles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 12mg of ferric citrate and 38mg of graphene into 200mL of n-propylamine, ultrasonically (electric power 150W) disperse for 200 minutes, transfer to a flask, stir and heat to 150 o C. After reacting for 2 hours, filter, wash, and dry to obtain about 40 mg of Fe / graphene nanocatalyst with a mass fraction of iron of 5%, and the particle size of Fe in the catalyst is about 20 nanometers. Take 30 mg of the above-mentioned Fe / graphene catalyst and load it into a fixed-bed reactor, and the CO conversion rate is 55% under the aforementioned test conditions.

Embodiment 2

[0029] Add 48.3mg of ferric oxalate and 85mg of graphene into 150mL of diethylenetriamine, disperse with ultrasonic (power 270W) for 40 minutes, transfer to the flask, stir and heat to 180 o C. After reacting for 3 hours, filter, wash, and dry to obtain about 100 mg of Fe / graphene catalyst with an iron mass fraction of 15%, and the particle size of Fe in the catalyst is about 50 nanometers. Take 30 mg of the above-mentioned Fe / graphene catalyst and load it into a fixed-bed reactor, and the CO conversion rate is 85% under the aforementioned test conditions.

Embodiment 3

[0031] Add 39.5mg of cobalt nitrate and 192mg of graphene into 500mL of 1,6-hexamethylenediamine, disperse with ultrasonic (power 70W) for 50 minutes, transfer to the flask, stir and heat to 250 o C. After reacting for 12 hours, filter, wash, and dry to obtain about 200 mg of Co / graphene catalyst with a cobalt mass fraction of 4%, and the Co particle size in the catalyst is about 10 nanometers. Take 30 mg of the above-mentioned Co / graphene catalyst and put it into a fixed-bed reactor, and the CO conversion rate is 54% under the aforementioned test conditions.

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Abstract

The invention discloses a metal / graphene catalyst and preparation method thereof. The mass percent of the metal is 1-30%, the mass ratio of the metal salt and the graphene is (0.1-100):100, the mass ratio of the organic amine and metal salt is (50-500):1, the metal salt and graphene are added in the organic amine to ultrasonically disperse for 5-300 minutes, the dispersed solution is stirred and heated to 100-300 DEG.C after reacting for 0.5-24 hours, the solution is filtered, washed and dried to obtain the metal / graphene catalyst. The metal / graphene catalyst is simple in preparation method and controllable in metal particle size.

Description

technical field [0001] The invention belongs to a catalyst and a preparation method, in particular to a graphene-loaded metal nanoparticle catalyst and a preparation method. Background technique [0002] Catalysts play a very important role in modern chemical industry, energy and environmental protection. From the large-scale production of petrochemicals to the synthesis of fine chemicals, more than 90% of chemical processes require the participation of catalysts. Because supported metal catalysts have high catalytic activity, selectivity and stability, and are easy to form during use, they can be used in various harsh chemical environments, so they are widely used in catalytic reactions such as hydrogenation, dehydrogenation and reforming middle. As the most important type of catalyst in the fields of petrochemical, fine chemical and environmental catalysis, the preparation, characterization and catalytic mechanism of supported metal catalysts have always been the main res...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/75B01J23/755B01J23/72B01J23/06B01J23/80
Inventor 郭向云郭晓宁靳国强
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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