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Metal phosphide-porous carbon framework composite material, and preparation method and application thereof

A metal phosphide and frame material technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of metal phosphide nanoparticles encountering bottlenecks, collapse, and specific surface area decline, and achieve The preparation method is simple and novel, the cost is low, and the effect of small particle size

Active Publication Date: 2018-03-02
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at 300°C, ultra-thin or ultra-small nanoparticles will agglomerate, and the pore size of the precursor itself will collapse, resulting in a decrease in specific surface area, making the porous metal phosphide nanoparticles with large specific surface area a bottleneck.

Method used

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  • Metal phosphide-porous carbon framework composite material, and preparation method and application thereof
  • Metal phosphide-porous carbon framework composite material, and preparation method and application thereof
  • Metal phosphide-porous carbon framework composite material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] A kind of preparation of metal phosphide-porous carbon framework composite material, comprises the steps:

[0058] 1) Weigh 727.68 mg of cobalt nitrate hexahydrate and 148.75 mg of zinc nitrate hexahydrate dissolved in 30 ml of methanol solution as solution A, weigh 1.97 g of dimethylimidazole dissolved in 20 ml of methanol solution as solution B , quickly pour solution A into solution B, stir rapidly at room temperature for 24 hours, and use a centrifuge at 10,000 rpm -1 Centrifuge for 3 minutes, wash with ethanol three times, dry, then calcinate in a muffle furnace at 350°C for 2 hours, and cool down naturally to obtain Zn,Co-O@CNFs (namely zinc oxide and cobalt tetroxide-porous carbon framework composite material), in which The mol ratio of zinc salt and cobalt salt is 0.5:2.5;

[0059] 2) Take 65mg of Zn,Co-O@CNFs prepared in step 1) and put it in the downwind direction of the tube furnace, take 650mg of sodium hypophosphite phosphorus source and put it in the upwi...

Embodiment 2

[0061] A kind of preparation of metal phosphide-porous carbon framework composite material, comprises the steps:

[0062] 1) Weigh 582.14 mg of cobalt nitrate hexahydrate and 297.49 mg of zinc nitrate hexahydrate and dissolve it in 30 ml of methanol solution as solution A, weigh 1.97 g of dimethylimidazole and dissolve it in 20 ml of methanol solution as solution B , quickly pour solution A into solution B, stir rapidly at room temperature for 24 hours, and use a centrifuge at 10,000 rpm -1 Centrifuge for 3 minutes, wash with ethanol three times, dry, and then calcined in a muffle furnace at 350°C for 2 hours, and naturally cool down to obtain Zn,Co-O@CNFs (namely zinc oxide and cobalt tetroxide-porous carbon frame composite material), and feed The mol ratio of zinc salt and cobalt salt in is 1.0:2.0;

[0063] 2) Take 65mg of Zn,Co-O@CNFs prepared in step 1) and put it in the downwind direction of the tube furnace, take 650mg of sodium hypophosphite phosphorus source and put ...

Embodiment 3

[0065] A kind of preparation of metal phosphide-porous carbon framework composite material, comprises the steps:

[0066] 1) Weigh 436.61mg of cobalt nitrate hexahydrate and 446.24mg of zinc nitrate hexahydrate and dissolve it in 30 milliliters of methanol solution as solution A, weigh 1.97g of dimethylimidazole and dissolve it in 20 milliliters of methanol solution as solution B , quickly pour solution A into solution B, stir rapidly at room temperature for 24 hours, centrifuge with a centrifuge at 10,000 rpm for 3 minutes, wash with ethanol three times, dry, and then calcinate in a muffle furnace at 350°C for 2 hours, and naturally cool down to obtain Zn , Co-O@CNFs is zinc oxide and cobalt tetroxide-porous carbon framework composite material, in which the molar ratio of zinc salt and cobalt salt in the feed is 1.5:1.5; zinc oxide and cobalt tetroxide-porous carbon framework composite material under the scanning electron microscope Energy spectrum such as Figure 12 shown. ...

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Abstract

The invention discloses a preparation method of a metal phosphide-porous carbon framework composite material. The method comprises the following steps: calcining a bimetallic metal organic framework material to obtain a porous carbon framework material, respectively placing the porous carbon framework material and a phosphorus source in two ends of a tubular furnace, introducing an inert gas, heating the tubular furnace to a certain temperature, carrying out a phosphating reaction, and washing the obtained reaction product with an acid to obtain the metal phosphide-porous carbon framework composite material. The invention also discloses the metal phosphide-porous carbon framework composite material and an application thereof. The metal phosphide-porous carbon framework composite material prepared through the preparation method has the advantages of large specific surface area, small particle size of metal phosphide, and excellent catalytic hydrogen desorption performance. The porous metal phosphide with a large specific surface area is obtained by using a bimetallic metal organic framework as a self-template through a selective phosphating technology capable of phosphating Co3O4 ornickel oxide but incapable of phosphating zinc oxide under the same conditions; and the preparation method has the advantages of simplicity, novelty and low cost.

Description

technical field [0001] The invention relates to the technical field of material preparation. More specifically, it relates to a metal phosphide-porous carbon frame composite material and its preparation method and application. Background technique [0002] Traditional energy is decreasing day by day, and traditional energy is accompanied by the release of greenhouse gases and toxic and harmful gases, which is not conducive to sustainable development. Therefore, it is urgent to develop clean and effective new energy. Hydrogen has attracted extensive attention as a zero-pollution energy source, however, storage and transportation of hydrogen have brought new problems. [0003] Among the current hydrogen storage materials, such as metal hydrides, organic hydrides, boron nitrogen compounds and hydrazine hydrate, ammonia borane, as a simple boron-nitrogen compound, has a hydrogen storage capacity of 19.6wt% and a molecular weight as low as 30.7g mol -1 , making it a good hydro...

Claims

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Application Information

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IPC IPC(8): B01J27/185C01B3/06
CPCC01B3/06B01J27/1853B01J37/06B01J37/084B01J37/28B01J35/50B01J35/40B01J35/613B01J35/615Y02E60/36
Inventor 陈勇陈倩倩侯春朝彭成云
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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