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Preparation method of iron, cobalt and nitrogen co-doped carbon nanofiber catalyst

A carbon nanofiber and nanofiber technology, applied in the field of fuel cell oxygen reduction catalyst materials, can solve the problems of complex preparation method, high cost, limited application, etc., and achieve the effects of simple steps, low cost, increased activity and stability

Inactive Publication Date: 2018-07-24
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current M-N-C catalysts mostly use carbon nanotubes, graphene or other carbon materials as supports, and their preparation methods are complex and costly, which limits their further application.

Method used

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  • Preparation method of iron, cobalt and nitrogen co-doped carbon nanofiber catalyst
  • Preparation method of iron, cobalt and nitrogen co-doped carbon nanofiber catalyst
  • Preparation method of iron, cobalt and nitrogen co-doped carbon nanofiber catalyst

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Embodiment 1

[0035] A preparation method of iron, cobalt, nitrogen co-doped carbon nanofiber catalyst, specifically comprising the following steps:

[0036] 1) Preparation of electrospinning precursor solution:

[0037] Weigh 0.1g of cobalt acetate, 1.9g of zinc acetate, and 0.2g of ferric chloride respectively, add them to 10mL of N,N-dimethylformamide, stir at room temperature until the cobalt acetate, zinc acetate, and ferric chloride are completely dissolved, Denoted as solution A. Weigh 2g of polyacrylonitrile, add it into 10mL of N,N-dimethylformamide, stir at room temperature until the solution is transparent, and record it as solution B. Solution A was added into solution B, and after stirring for 12 hours, a homogeneously mixed electrospinning precursor solution was obtained.

[0038] 2) Preparation of polymer nanofibers:

[0039] Inject the electrospinning precursor solution obtained in step 1) into a syringe with a stainless steel needle, place the syringe on the electrospinn...

Embodiment 2

[0047] A preparation method of iron, cobalt, nitrogen co-doped carbon nanofiber catalyst, specifically comprising the following steps:

[0048] 1) Preparation of electrospinning precursor solution:

[0049] Weigh 0.5g of cobalt acetate, 1.9g of zinc acetate, and 0.2g of ferric chloride respectively, add them to 10mL of N,N-dimethylformamide, stir at room temperature until the cobalt acetate, zinc acetate, and ferric chloride are completely dissolved, Denoted as solution A. Weigh 2g of polyacrylonitrile, add it into 10mL of N,N-dimethylformamide, stir at room temperature until the solution is transparent, and record it as solution B. Solution A was added into solution B, and after stirring for 12 hours, a homogeneously mixed electrospinning precursor solution was obtained.

[0050] 2) Preparation of polymer nanofibers:

[0051] Inject the electrospinning precursor solution obtained in step 1) into a syringe with a stainless steel needle, place the syringe on the electrospinn...

Embodiment 3

[0055] A preparation method of iron, cobalt, nitrogen co-doped carbon nanofiber catalyst, specifically comprising the following steps:

[0056] 1) Preparation of electrospinning precursor solution:

[0057] Weigh 0.5g of cobalt acetate, 0.95g of zinc acetate, and 0.2g of ferric chloride, respectively, and add them to 10mL of N,N-dimethylformamide, and stir at room temperature until the cobalt acetate, zinc acetate, and ferric chloride are completely dissolved. Denoted as solution A. Weigh 2g of polyacrylonitrile, add it into 10mL of N,N-dimethylformamide, stir at room temperature until the solution is transparent, and record it as solution B. Solution A was added into solution B, and after stirring for 12 hours, a homogeneously mixed electrospinning precursor solution was obtained.

[0058] 2) Preparation of polymer nanofibers:

[0059] Inject the electrospinning precursor solution obtained in step 1) into a syringe with a stainless steel needle, place the syringe on the el...

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Abstract

The invention relates to a preparation method of an iron, cobalt and nitrogen co-doped carbon nanofiber catalyst. The preparation method comprises the following steps: firstly, preparation of an electrostatic spinning precursor solution, respectively adding cobalt salt, zinc salt and iron salt into an organic solvent to obtain a solution A, and adding a high polymer into the organic solvent to obtain a solution B; adding the solution A into the solution B and uniformly mixing; secondly, preparation of polymer nanofibers: preparing the polymer nanofibers by using an electrospinning technology and the electrostatic spinning precursor solution; thirdly, preparation of a catalyst: carrying out heat treatment on the polymer nanofibers to obtain the catalyst. Compared with the prior art, the preparation method of the iron, cobalt and nitrogen co-doped carbon nanofiber catalyst, disclosed by the invention, has the advantages of simple steps, easiness in operation and controllable implementation conditions; the iron, cobalt and nitrogen co-doped carbon nanofiber catalyst can be obtained without a template or activation etching; in addition, the iron, cobalt and nitrogen co-doped carbon nanofiber catalyst has oxygen reduction performance similar to that of commercial platinum carbon, and has the advantages of low cost, high efficiency, no pollution and capability of being used as a cathode catalyst for an alcohol fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cell oxygen reduction catalyst materials, and relates to a preparation method of iron, cobalt and nitrogen co-doped carbon nanofiber catalysts. Background technique [0002] Nowadays, global environmental pollution and energy crisis have become two serious problems, and the development and utilization of sustainable clean energy has become extremely critical. Among them, direct alcohol fuel cell is a new energy technology that has received extensive attention, and it is the fuel cell closest to commercial application. Platinum-based electrocatalysts are the most widely used electrocatalysts in direct alcohol fuel cells. However, due to the limited reserves of platinum, high price, and short service life, direct alcohol fuel cells cannot be commercialized on a large scale. Therefore, the development of low-cost, high-activity, and high-stability cathode non-noble metal catalysts is the key to solving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/88H01M4/9041H01M4/9083Y02E60/50
Inventor 徐群杰余克王啸张靖泽闵宇霖范金辰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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