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Cobalt-based bimetallic catalyst with cylindrical structure as well as preparation method and application of cobalt-based bimetallic catalyst

A bimetallic catalyst and catalyst technology, applied in the field of catalysts and their preparation methods and applications, can solve the problems of difficult preparation size and shape, and achieve the effects of improving equipment production capacity, easy separation, and convenient recycling

Active Publication Date: 2015-06-10
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of nanoparticles and nanostructures with controllable size and shape (especially novel shapes) is a difficult problem and extremely challenging.

Method used

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  • Cobalt-based bimetallic catalyst with cylindrical structure as well as preparation method and application of cobalt-based bimetallic catalyst
  • Cobalt-based bimetallic catalyst with cylindrical structure as well as preparation method and application of cobalt-based bimetallic catalyst
  • Cobalt-based bimetallic catalyst with cylindrical structure as well as preparation method and application of cobalt-based bimetallic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 2mmol cobalt acetate (Co(Ac) 2 4H2 O) and 2mmol nickel acetate (Ni(Ac) 2 4H 2 O), mixed and dissolved in 20mL ethanol, under normal temperature conditions, stirred and dissolved to obtain a uniform solution A.

[0046] Then weigh 0.4g of sodium hydroxide and 1mmol of PVP-K29-32, ultrasonically dissolve in 5mL of 85wt% hydrazine hydrate, add the obtained solution to solution A drop by drop, stir and mix evenly to obtain solution B.

[0047] The obtained solution was added into a 30ml hydrothermal kettle, and heated in a water bath at a temperature of 120° C. for 10 hours under airtight conditions. Then, after the reaction temperature was cooled to room temperature, the black substance (product) was scraped off with a spatula, washed 4-6 times with deionized water and absolute ethanol respectively, and finally the product was vacuum-dried at 60°C for 4 hours to obtain cobalt-based Bimetallic columnar nanocatalysts.

[0048] Among them, the SEM image of the catal...

Embodiment 2

[0053] Weigh 2mmol cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 2mmol nickel acetate (Ni(Ac) 2 4H 2 O), mixed and dissolved in 20mL propanol, under normal temperature conditions, stirred and dissolved to obtain a uniform solution A.

[0054] Then weigh 0.4g sodium hydroxide and 1mmol PVP-K13-18, ultrasonically dissolve in 5mL 45wt% hydrazine hydrate, add the obtained solution dropwise to solution A, stir and mix evenly, and obtain solution B.

[0055] The obtained solution was added into a 30ml hydrothermal kettle, and heated in a water bath at a temperature of 110° C. for 20 hours under airtight conditions. Then, after the reaction temperature was cooled to room temperature, the black substance (product) was scraped off with a spatula, washed 4-6 times with deionized water and absolute ethanol respectively, and finally the product was vacuum-dried at 50°C for 8 hours to obtain cobalt-based Bimetallic columnar nanocatalysts.

[0056] The columnar diameter of the catalyst is ...

Embodiment 3

[0059] Weigh 2mmol cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 2mmol nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), mixed and dissolved in 20mL butanol, under normal temperature conditions, stirred and dissolved to obtain a uniform solution A.

[0060] Then weigh 0.4g sodium hydroxide and 1mmol PVP-K23-27, ultrasonically dissolve in 5mL 60wt% hydrazine hydrate, add the obtained solution dropwise to solution A, stir and mix evenly, and obtain solution B.

[0061] The obtained solution was added into a 30ml hydrothermal kettle, and heated in a water bath at a temperature of 150° C. for 8 hours under airtight conditions. Then, after the reaction temperature was cooled to room temperature, the black substance (product) was scraped off with a spatula, washed 4-6 times with deionized water and absolute ethanol respectively, and finally the product was vacuum-dried at 55°C for 6 hours to obtain a cobalt-based Bimetallic columnar nanocatalysts.

[0062] The columnar diameter of the catalys...

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Abstract

The invention discloses a cobalt-based bimetallic catalyst with a cylindrical structure as well as a preparation method and application of the cobalt-based bimetallic catalyst. The cobalt-based bimetallic catalyst is prepared from the following steps: dissolving a cobalt source and a nickel source in a solvent to prepare a solution A; and adding a surfactant, a reducing agent and alkali in the solution A, and carrying out water bath heating treatment under the sealing condition to obtain the catalyst. The catalyst can be applied to reaction of catalyzing nitrobenzene hydrogenation, has a nanometer cylindrical structure, has the characteristics of good dispersion, stable structure, uniform morphology and size, exposure of high-activity crystal face, high reactivity to nitrobenzene hydrogenation and the like, is good in repeatability and is environmentally friendly due to mild conditions in the hydrogenation reaction process, also has the advantages of simplicity in preparation, good stability, easiness in separation of a product and the catalyst, convenience in recovery and utilization, easiness in activity and the like and has good industrial application prospect.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and application, in particular to a cobalt-based bimetallic catalyst with a columnar structure and its preparation method and application. Background technique [0002] Due to their unique volume effect, surface effect and quantum size effect, nanomaterials have different electrical, optical, force and magnetic properties from bulk materials. The application of these aspects is closely related to the size and shape of nanomaterials. In recent years, with the development of nanotechnology, nanomaterials with controllable morphology have attracted more and more attention from researchers in various disciplines because of their unique physical and chemical properties. The so-called appearance includes two aspects: size and shape. It is well known that when the size of the material is small to a certain extent, some of its physical parameters will change; and nanomaterials with uniform shape ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B82Y30/00B82Y40/00C07C1/32C07C13/18
Inventor 孙予罕巴荣彬余璐静祝艳
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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