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Cobalt @ cobaltosic oxide nanoparticle embedded nitrogen-doped carbon nanotube material and preparation method and application thereof

A nitrogen-doped carbon and nanoparticle technology is applied in the field of doped carbon nanotube materials, which can solve the problems of uneven distribution of metals, separation of metals from carriers, and unreliable bonding.

Inactive Publication Date: 2019-06-28
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are problems of uneven distribution and unreliable bonding of metals on the surface of the carrier.
These problems can lead to poor catalytic performance of the material in the field of fuel cell catalysts, and can also lead to the detachment of metals from the support.

Method used

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  • Cobalt @ cobaltosic oxide nanoparticle embedded nitrogen-doped carbon nanotube material and preparation method and application thereof
  • Cobalt @ cobaltosic oxide nanoparticle embedded nitrogen-doped carbon nanotube material and preparation method and application thereof
  • Cobalt @ cobaltosic oxide nanoparticle embedded nitrogen-doped carbon nanotube material and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The invention provides a Co@Co 3 o 4 A method for preparing a nanoparticle-embedded nitrogen-doped carbon nanotube material, comprising:

[0032] 1) Mixing the cobalt source, P123, nitrogen source and solvent to obtain a precursor solution, and then removing the solvent from the precursor solution to obtain a mixture;

[0033] 2) Grinding the mixture to obtain a powder, and then calcining the powder in the presence of protective gas to obtain Co@Co 3 o 4 Nanoparticles embedded in nitrogen-doped carbon nanotube materials;

[0034] Wherein, the nitrogen source is selected from at least one of melamine, urea and 2-methylimidazole.

[0035] In the present invention, the amount of each raw material can be selected in a wide range, but in order to further improve the degree of bonding between the metal and the carrier and further improve the Co@Co 3 o 4 The catalytic properties of nanoparticles embedded in nitrogen-doped carbon nanotube materials, preferably, in the pre...

Embodiment 1

[0047] 1) Add 5mL of P123 aqueous solution with a concentration of 0.1g / mL to 3ml of 0.1mol / L Co(NO 3 ) 2· 6H 2 O aqueous solution, and stirred for a period of time to form a homogeneous solution;

[0048] 2) Add 0.7664g of melamine to the solution obtained in step 1), and stir at 25°C for 1 hour to obtain a precursor solution;

[0049] 3) Transfer the obtained precursor solution to an oven at 80°C for 72 hours to dry the solvent completely;

[0050] 4) Grind the mixture and transfer it to a tube furnace for calcination, specifically: under nitrogen protection, heat up from 20°C to 700°C at a rate of 5°C / min and keep it warm for 1h, then heat at 5°C / min The temperature is lowered to 20°C at a certain rate, and the product PMC-700 is obtained.

[0051] The SEM picture of the product PMC-700 is as follows Figure 1a shown. The TEM image of the product PMC-700 is as follows Figure 1b and Figure 1c , Figure 1d and 1e shown. The XRD pattern of product PMC-700 is as fol...

Embodiment 2

[0053] Carry out according to the method of Example 1, the difference is that in step 4), the calcination in step 4) is heated from 15°C to 800°C at a rate of 6°C / min and kept for 1h, and then cooled to 15°C at a rate of 6°C / min to obtain the product PMC-800.

[0054] The SEM picture of the product PMC-800 is as follows Figure 2d shown. The TEM image of the product PMC-800 is as follows Figure 3d shown.

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Abstract

The invention discloses a cobalt @ cobaltosic oxide nanoparticle embedded nitrogen-doped carbon nanotube material and a preparation method and application thereof. The preparation method comprises that a cobalt source, P123, a nitrogen source and a solvent are mixed to prepare a precursor solution, the solvent is removed from the precursor solution to obtain a mixture; and 2) the mixture is groundto obtain powder, the powder is burned in protective gas to prepare the Co@Co3O4 nanoparticle embedded nitrogen-doped carbon nanotube material. The nitrogen source is at least one selected from melamine, urea and 2-methylimidazole. The preparation method is low in cost and simple in technology, the Co@Co3O4nanoparticle embedded nitrogen-doped carbon nanotube material with uniform morphology, different from a routine load form, controllability and higher particle dispersiveness is obtained, and further the material can be used as a cathode catalyst of a fuel cell.

Description

technical field [0001] The present invention relates to a doped carbon nanotube material, in particular to a cobalt@cobalt tetroxide nanoparticle-embedded nitrogen-doped carbon nanotube material and its preparation method and application. Background technique [0002] In today's society of energy depletion and environmental pollution, it is imperative to develop fuel cells, a green energy technology. The use of cathode catalysts is considered to be the dominant factor affecting the electrochemical performance of fuel cells. The research on carbon materials used as catalyst supports for fuel cells is becoming more and more mature. With the continuous in-depth research of people, non-metal element doped catalysts have gradually developed into excellent ORR catalysts that can replace commercial Pt / C. In recent years, in-depth studies have found that nanotubes doped or co-doped with non-metallic heteroatoms such as nitrogen can effectively avoid the loss of catalyst support su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90B82Y30/00
CPCY02E60/50
Inventor 耿竞王晓丹孙娜耿保友
Owner ANHUI NORMAL UNIV
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