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Preparation of Fe-Co co-doped carbon-nitrogen core-shell microspheres and its application in electrocatalysis

A technology of core-shell carbon-nitrogen microspheres and co-doping, which is applied in circuits, electrical components, battery electrodes, etc., can solve the problems of accelerating oxygen reduction and the unrealistic large-scale commercial production of catalysts, and achieves controllable conditions and low production costs. Low and enhanced catalytic efficiency

Inactive Publication Date: 2018-12-21
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Oxidation reaction and reduction reaction occur at the anode and cathode of the hydrogen-oxygen fuel cell respectively. In order to accelerate the hydrogen oxidation of the anode and the oxygen reduction of the cathode, platinum-containing catalysts are carried on the anode and cathode respectively. Since the price of platinum is relatively expensive, the Large-scale commercial production of such catalysts is not realistic enough, in this case, the development of low-platinum or platinum-free catalysts has a very important development significance

Method used

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  • Preparation of Fe-Co co-doped carbon-nitrogen core-shell microspheres and its application in electrocatalysis
  • Preparation of Fe-Co co-doped carbon-nitrogen core-shell microspheres and its application in electrocatalysis
  • Preparation of Fe-Co co-doped carbon-nitrogen core-shell microspheres and its application in electrocatalysis

Examples

Experimental program
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Embodiment 1

[0025] Prepare 1.35g of FeCl 3 ·6H 2 Dissolve O in ethylene glycol, sonicate to fully dissolve, add 3.6g NaAc, continue to sonicate to make the solution appear milky yellow, put it into a hydrothermal reaction kettle, set the temperature at 200°C, and set the reaction time at 10h for solvothermal reaction , the product was washed with deionized water and ethanol, and dried in a vacuum oven to obtain Fe 3 o 4 .

[0026] Add the above microspheres into a sulfuric acid solution with a pH of 1 and disperse evenly, dissolve 0.5ml of aniline monomer in 5ml of ethanol, add the above solution, dissolve 0.5g of cobalt nitrate in 10ml of deionized water, add the above solution, and stir in an ice bath for 1h Pre-cooling, then dissolve 1.226g APS in 10ml water, add dropwise to the above reaction solution within 30min, and then react in ice bath for 12h, the product is washed with deionized water and ethanol, then purified by using a magnet, and then placed in Dry in a vacuum oven to ...

Embodiment 2

[0030] Prepare 1.35g of FeCl 3 ·6H 2 Dissolve O in ethylene glycol, sonicate to fully dissolve, add 3.6g NaAc, continue to sonicate to make the solution appear milky yellow, put it into a hydrothermal reaction kettle, set the temperature at 200°C, and set the reaction time at 10h for solvothermal reaction , the product was washed with deionized water and ethanol, and dried in a vacuum oven to obtain Fe 3 o 4 .

[0031] Add the above microspheres into a sulfuric acid solution with a pH of 1 and disperse evenly, dissolve 0.75ml of aniline monomer in 5ml of ethanol, add the above solution, dissolve 0.5g of cobalt nitrate in 10ml of deionized water, add the above solution, and stir in an ice bath for 1h Pre-cooling, then dissolve 1.840gAPS in 10ml water, add dropwise to the above reaction solution within 30min, and then react in ice bath for 12h, the product is washed with deionized water and ethanol, then purified with a magnet, and then placed in Dry in a vacuum oven to obta...

Embodiment 3

[0035] Prepare 1.35g of FeCl3 ·6H 2 Dissolve O in ethylene glycol, sonicate to fully dissolve, add 3.6g NaAc, continue to sonicate to make the solution appear milky yellow, put it into a hydrothermal reaction kettle, set the temperature at 200°C, and set the reaction time at 10h for solvothermal reaction , the product was washed with deionized water and ethanol, and dried in a vacuum oven to obtain Fe 3 o 4 .

[0036] Add the above-mentioned microspheres into a sulfuric acid solution with a pH of 1 to disperse evenly, dissolve 1ml of aniline monomer in 5ml of ethanol, add the above-mentioned solution, dissolve 0.5g of cobalt nitrate in 10ml of deionized water, add the above-mentioned solution, and stir in an ice bath for 1 hour. After cooling, 2.452g APS was dissolved in 10ml water, added dropwise to the above reaction solution within 30min, and then reacted in an ice bath for 12h, the product was washed with deionized water and ethanol, purified using a magnet, and then pla...

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Abstract

The invention discloses the preparation and application of iron-cobalt co-doped carbon-nitrogen core-shell microsphere material, which is used for cathodic oxygen reduction reaction electrocatalyst offuel cell. Fe3O4, aniline, cobalt nitrate hexahydrate and 2-methylimidazole are used as raw materials. The preparation method comprises steps that the aniline is polymerized on the Fe3O4 microspheresby in-situ growth to form core-shell microspheres, washed with ethanol and deionized water, and then dried in a vacuum drying oven, and then ZIF-67 is continuously grown on the above microspheres, and the same washing is performed. After washing and drying, the microspheres are placed in a tube furnace for carbonization, followed by carbonization using sulfuric acid as a medium for pickling, andthen washing and drying are continuously carried out. After such a series of treatment, Fe-Co co-doped carbon-nitrogen core-shell microspheres were obtained. As that carbon-nitrogen core-shell microsphere material prepare by the invention is green and environmentally friendly, and has good electrocatalytic performance, the carbon-nitrogen core-shell microsphere material has important value and significance in the field of heteroatom doped carbon-based oxygen reduction electrocatalyst.

Description

technical field [0001] The invention belongs to the field of fuel cell electrocatalysis, and in particular relates to the preparation of iron-cobalt co-doped carbon-nitrogen core-shell 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. Oxidation reaction and reduction reaction occur at the anode and cathode of the hydrogen-oxygen fuel cell respectively. In order to accelerate the hydrogen oxidation of the anode and the oxygen reduction of the cathode, platinum-containing catalysts are carried on the anode and cathode respectively. Since the price of platinum is relatively expensive, the However, the large-scale commercial production of such catalysts is not realistic enough. In this case, the development of low-platinum or platinum-free catalysts is of great significance. [0003] Because th...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8803H01M4/9008H01M4/9041Y02E60/50
Inventor 马贵平李凌峰聂俊吕金艳
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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