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Hollow bowl-shaped carbon carrier, preparation method thereof, platinum-based catalyst and membrane electrode

A carbon carrier and catalyst technology, applied in the field of fuel cells, can solve the problems of difficulty in mass production, unfavorable mass transfer process, excessive wall thickness, etc., to improve space utilization, improve kinetic activity, and low cost. Effect

Active Publication Date: 2022-07-12
国家电投集团氢能科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wall thickness of hollow carbon spheres prepared by this technical scheme is between 20 and 40nm, which is too thick, so it is not conducive to the mass transfer process
In addition, materials such as PluronicP123 are relatively expensive and difficult to achieve mass production

Method used

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  • Hollow bowl-shaped carbon carrier, preparation method thereof, platinum-based catalyst and membrane electrode
  • Hollow bowl-shaped carbon carrier, preparation method thereof, platinum-based catalyst and membrane electrode
  • Hollow bowl-shaped carbon carrier, preparation method thereof, platinum-based catalyst and membrane electrode

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preparation example Construction

[0041] The preparation method of the hollow bowl-shaped carbon carrier of the embodiment of the present invention comprises the following steps:

[0042] a. Add tetraethyl orthosilicate to the water-soluble dispersant and mix well;

[0043] b. Add the first component and the second component to the solution of the step a, and the mass ratio of the first component and the second component to the ethyl orthosilicate added in the step a is 1 :(1~4):(10~20), preferably 1:(1~4):(10~15), more preferably 1:(1~3):(10~14), stirring, the reaction produces The precipitation is filtered, washed and dried to obtain a solid product, wherein the first component is selected from one of m-aminophenol, phenol, cresol, xylenol, resorcinol, tert-butylphenol or bisphenol A. kind, preferably m-aminophenol, and the second component is selected from one of formaldehyde, acetaldehyde or furfural, preferably formaldehyde;

[0044] c. Carbonizing the dried solid product in step b under an inert atmosp...

Embodiment 1

[0057] 1. Preparation of carbon support

[0058] 5.5 g of ethyl orthosilicate was dissolved in 20 mL of ethanol, and then added dropwise to a mixed solution consisting of 70 mL of ethanol, 10 mL of ammonia water and 30 mL of water, and stirred uniformly for 1.5 h. Then add 0.5 g of resorcinol and 0.6 g of formaldehyde, that is, the mass ratio of resorcinol: formaldehyde: ethyl orthosilicate is 1:1.2:11, stir at room temperature, and collect the precipitate by centrifugation. The pellet was washed several times. The washed product was dried overnight, and then sent to a rotary tube sintering furnace at a heating rate of 5 °C / min, carbonized at a constant temperature of 700 °C for 5 h in a nitrogen atmosphere, and then switched to carbon dioxide gas, and heated at 10 °C / min. The heating rate was increased to 950°C for 0.5h constant temperature treatment, and the rotation function was started after ventilation, and the rotation rate was 15rpm. Finally, the heat-treated product ...

Embodiment 2

[0063] 1. Preparation of carbon support

[0064] 10 g of ethyl orthosilicate was dissolved in 50 mL of ethanol, and then added dropwise to a mixed solution consisting of 105 mL of ethanol, 15 mL of ammonia water and 60 mL of water, and stirred uniformly for 2 h. Then add 0.8 g m-aminophenol and 1.2 g formaldehyde, that is, the mass ratio of m-aminophenol: formaldehyde: ethyl orthosilicate is 1:1.5:12.5, stir at room temperature, collect the precipitate by centrifugation, and repeat the precipitate with ethanol and deionized water Wash multiple times. The washed product was dried overnight, and then sent to a rotary tube sintering furnace with a heating rate of 3 °C / min, carbonized at a constant temperature of 800 °C for 4 h in a nitrogen atmosphere, and then switched to carbon dioxide gas, and the heating rate was 10 °C / min. The temperature was raised to 1000 °C for 1 h of constant temperature treatment, and the rotation function was activated after ventilation, and the rotat...

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Abstract

The invention discloses a hollow bowl-shaped carbon carrier, a preparation method of the hollow bowl-shaped carbon carrier, a platinum-based catalyst and a membrane electrode. The preparation method of the hollow bowl-shaped carbon carrier comprises the following steps: a, adding tetraethoxysilane into a water-soluble dispersant, and mixing; b, a first component and a second component are added into the solution obtained in the step a, a solid product is obtained through filtering, washing and drying, the first component is selected from one of m-aminophenol, phenol, cresol, xylenol, resorcinol, tert-butyl phenol or bisphenol A, and the second component is selected from one of formaldehyde, acetaldehyde or furfural; c, carbonizing the solid product in the step b in an inert atmosphere, and then switching to an oxidizing atmosphere for activating treatment to obtain a sintered product; and d, adding the sintered product in the step c into a hydrofluoric acid aqueous solution to remove SiO2, filtering, washing and drying to obtain the bowl-shaped carbon carrier. According to the preparation method disclosed by the invention, the carbon carrier with the hollow bowl-shaped structure can be prepared, and the platinum-based catalyst prepared by using the carbon carrier as the carrier can be applied to the field of electro-catalysis and can show excellent catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a hollow bowl-shaped carbon carrier and a preparation method thereof, in particular, a platinum-based catalyst and a preparation method thereof, more particularly, a membrane electrode. Background technique [0002] As an efficient energy conversion device, proton exchange membrane fuel cell has the advantages of high energy density, fast fuel supply and zero pollution, and is a very promising technology. Catalysts, as key components of membrane electrodes in proton exchange membrane fuel cells, play a crucial role in cell performance and durability. Platinum-based catalysts are one of the catalysts widely used in proton exchange membrane fuel cells. Usually, platinum-based catalysts are mostly supported by carbon materials, because carbon materials have flexibly tunable structures, good electron and mass transfer pathways, and excellent electrochemical stability. [0003] C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/354H01M4/92H01M8/1004B82Y40/00
CPCC01B32/336C01B32/354H01M4/926H01M8/1004B82Y40/00Y02E60/50
Inventor 臧小刚赵维张泽鑫孙海卫柴茂荣
Owner 国家电投集团氢能科技发展有限公司
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