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Preparation of FeCo hollow carbon microsphere material and its application in electrocatalysis

A carbon microsphere, hollow technology, applied in nanotechnology, circuits, electrical components, etc. for materials and surface science, can solve the problems of high price of platinum, difficult to reduce costs, etc., and achieve the effect of large specific surface area

Inactive Publication Date: 2019-11-15
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, oxygen undergoes a reduction reaction at the cathode of the fuel cell, and hydrogen undergoes an oxidation reaction at the anode of the fuel cell. Due to the high activation energy of the oxygen reduction reaction, a catalyst is usually mounted on the cathode of the fuel cell to catalyze the oxygen reduction reaction. Currently, the most commercially available catalyst is Pt. / C catalyst, but the price of platinum is relatively expensive, so the large-scale commercial production of Pt / C catalyst is difficult to reduce the cost. In this case, the development of low-platinum or platinum-free catalyst has very important development significance.

Method used

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  • Preparation of FeCo hollow carbon microsphere material and its application in electrocatalysis
  • Preparation of FeCo hollow carbon microsphere material and its application in electrocatalysis
  • Preparation of FeCo hollow carbon microsphere material and its application in electrocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1.35g FeCl 3 ·6H 2 Dissolve O in 40mL of ethylene glycol, ultrasonically dissolve it fully, add 3.6g of NaAc, continue to ultrasonically turn the solution into a milky yellow color, put it into a hydrothermal reaction kettle, and continue to react for 10h at a reaction temperature of 200°C. Wash with deionized water and dry in a vacuum oven to obtain Fe 3 o 4 Microspheres.

[0025] Add the above-mentioned microspheres into a sulfuric acid solution with a pH of 1 and ultrasonically disperse them evenly. Dissolve 0.2ml of aniline monomer in 20ml of acetone, add the above-mentioned solution, stir in an ice-water bath for 1 hour to pre-cool, and dissolve 0.5g of APS in 20ml of sulfuric acid solution In 30min, dropwise added to the above reaction solution, ice-water bath reaction 10h, the product was washed with ethanol, put into a vacuum oven for drying, to obtain PANI / Fe 3 o 4 .

[0026] The above-mentioned microspheres were placed in a tube furnace under a nitrogen ...

Embodiment 2

[0030] 1.35g FeCl 3 ·6H 2 Dissolve O in 40mL of ethylene glycol, ultrasonically dissolve it fully, add 3.6g of NaAc, continue to ultrasonically turn the solution into a milky yellow color, put it into a hydrothermal reaction kettle, and continue to react for 10h at a reaction temperature of 200°C. Wash with deionized water and dry in a vacuum oven to obtain Fe 3 o 4 Microspheres.

[0031] Add the above-mentioned microspheres into a sulfuric acid solution with a pH of 1 and ultrasonically disperse them evenly. Dissolve 0.2ml of aniline monomer in 20ml of acetone, add the above-mentioned solution, stir in an ice-water bath for 1 hour to pre-cool, and dissolve 0.5g of APS in 20ml of sulfuric acid solution In 30min, dropwise added to the above reaction solution, ice-water bath reaction 10h, the product was washed with ethanol, put into a vacuum oven for drying, to obtain PANI / Fe 3 o 4 .

[0032] The above-mentioned microspheres were placed in a tube furnace under a nitrogen ...

Embodiment 3

[0035] 1.35g FeCl 3 ·6H 2 Dissolve O in 40mL of ethylene glycol, ultrasonically dissolve it fully, add 3.6g of NaAc, continue to ultrasonically turn the solution into a milky yellow color, put it into a hydrothermal reaction kettle, and continue to react for 10h at a reaction temperature of 200°C. Wash with deionized water and dry in a vacuum oven to obtain Fe 3 o 4 Microspheres.

[0036] Add the above microspheres into a sulfuric acid solution with a pH of 1 and ultrasonically disperse them evenly. Dissolve 0.2ml of aniline monomer in 20ml of ethanol, add the above solution, stir in an ice-water bath for 1 hour to pre-cool, and dissolve 0.5g of APS in 20ml of sulfuric acid solution In 30min, dropwise added to the above reaction solution, ice-water bath reaction 10h, the product was washed with ethanol, put into a vacuum oven for drying, to obtain PANI / Fe 3 o 4 .

[0037]The above-mentioned microspheres were placed in a tube furnace under a nitrogen atmosphere for carbon...

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Abstract

The invention discloses preparation of a FeCo hollow carbon microsphere material and its application in electrocatalysis. Hollow carbon microspheres are grown by utilizing a template method for a nanomaterial, Fe3O4 is utilized as a hard template, a layer of PANI is deposited on the surface by in-situ growth, and the hollow carbon microspheres are generated through processes of carbonization andpickling. In order to improve catalytic activity of the microspheres, ZIF-67 is grown on the surface, a product is subjected to secondary carbonization treatment at the same carbonization temperature,and thereby the FeCo hollow carbon microspheres are obtained. In order to confirm the superiority of the hollow structure and the promotion effect of the ZIF-67 on catalysis, samples without picklingand samples without ZIF-67 growth are both tested, the result shows that the catalyst effect is greatly improved through addition of the hollow structure and the ZIF-67, no pollution is generated inthe production process, the prepared hollow microsphere material has good electrocatalytic performance, and the process has important research values and significance in the field of electrocatalystshaving no precious metal doping.

Description

technical field [0001] The invention belongs to the field of fuel cell electrocatalysis, and in particular relates to the preparation and characterization of FeCo hollow carbon microsphere materials. Background technique [0002] Fuel cell is the fourth new power generation technology after hydropower, thermal power and atomic power, among which hydrogen-oxygen fuel cell is the most widely used and researched. Among them, oxygen undergoes a reduction reaction at the cathode of the fuel cell, and hydrogen undergoes an oxidation reaction at the anode of the fuel cell. Due to the high activation energy of the oxygen reduction reaction, a catalyst is usually mounted on the cathode of the fuel cell to catalyze the oxygen reduction reaction. Currently, the most commercially available catalyst is Pt. / C catalyst, but the price of platinum is relatively expensive, so the large-scale commercial production of Pt / C catalyst is difficult to reduce the cost. In this case, the development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9041H01M4/9083Y02E60/50
Inventor 马贵平李凌峰聂俊吕金艳
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH