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Preparation of Nitrogen-doped Ordered Hierarchical Mesoporous Carbon Catalysts and Its Carbon Catalysts and Applications

A carbon catalyst, mesoporous carbon technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as differences in catalytic activity, and achieve low cost, simplified preparation steps, and good electrochemical performance. The effect of stability

Active Publication Date: 2019-05-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the researchers found that the catalytic activity of carbon materials varies greatly depending on their specific surface and pore structure.

Method used

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  • Preparation of Nitrogen-doped Ordered Hierarchical Mesoporous Carbon Catalysts and Its Carbon Catalysts and Applications
  • Preparation of Nitrogen-doped Ordered Hierarchical Mesoporous Carbon Catalysts and Its Carbon Catalysts and Applications
  • Preparation of Nitrogen-doped Ordered Hierarchical Mesoporous Carbon Catalysts and Its Carbon Catalysts and Applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of phenolic resin prepolymer:

[0043] Melt 2g of phenol at 50°C, add 0.5g of 20wt.% NaOH aqueous solution and stir for 10min, drop in 3.5g of 37wt.% formaldehyde aqueous solution and continue stirring for 10min, slowly raise the temperature to 60°C for 30min, cool to room temperature, and adjust with dilute HCl solution The pH value of the solution is 7.0, dry in a vacuum oven at 60°C for 6-12 hours to reduce the water content in the viscous liquid as far as possible, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir for 12 hours, and dissolve the precipitated sodium chloride Centrifuge and remove, and finally prepare an ethanol solution of soluble phenolic resin prepolymer with a mass fraction of 25 wt.% for use.

[0044] (2) Preparation of Nitrogen-doped Ordered Hierarchical Mesoporous Carbon Catalysts

[0045] Dissolve 0.8g of F127 in 20g of ethanol, stir until clear and transparent, then add 4g of phenolic resin prepolymer...

Embodiment 2

[0048] (1) Preparation of phenolic resin prepolymer:

[0049] Melt 2g of phenol at 50°C, add 0.5g of 20wt.% NaOH aqueous solution and stir for 10min, drop in 3.5g of 37wt.% formaldehyde aqueous solution and continue stirring for 10min, slowly raise the temperature to 70°C for 30min, cool to room temperature, and adjust with dilute HCl solution The pH value of the solution is 7.0, dry in a vacuum oven at 60°C for 6-12 hours to reduce the water content in the viscous liquid as far as possible, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir for 12 hours, and dissolve the precipitated sodium chloride Centrifuge and remove, and finally prepare an ethanol solution of soluble phenolic resin prepolymer with a mass fraction of 25 wt.% for use.

[0050] (2) Preparation of Nitrogen-doped Ordered Hierarchical Mesoporous Carbon Catalysts

[0051] Dissolve 1.6g of F127 in 20g of ethanol, stir until clear and transparent, then add 4g of phenolic resin prepolymer...

Embodiment 3

[0054] (1) Preparation of phenolic resin prepolymer:

[0055] Melt 2.2g resorcinol at 50°C, add 0.5g 20wt.% NaOH aqueous solution and stir for 10min, drop in 3.5g 37wt.% formaldehyde aqueous solution and continue stirring for 10min, slowly heat up to 80°C for 30min, cool to room temperature, Use dilute HCl solution to adjust the pH value of the solution to 7.0, dry it in a vacuum oven at 60°C for 6-12 hours to minimize the water content in the viscous liquid, dissolve the obtained phenolic resin prepolymer in ethanol and stir for 12 hours, and The precipitated sodium chloride is removed by centrifugation, and finally the soluble phenolic resin prepolymer ethanol solution is prepared for use.

[0056] (2) Preparation of Nitrogen-doped Ordered Hierarchical Mesoporous Carbon Catalysts

[0057] Dissolve 2.1g of P123 in 20g of ethanol, stir until clear and transparent, then add 4g of phenolic resin prepolymer ethanol solution (the content of the prepolymer is 1g), and stir for 10m...

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Abstract

The invention discloses a preparation method of a nitrogen-doped ordered hierarchical mesoporous carbon catalyst and its application in a proton exchange membrane fuel cell. The catalyst is prepared by binary mixed template method, that is, triblock copolymer is used as soft template, molecular sieve is used as hard template, soluble resin is selected as carbon source, transition metal salt is added in the preparation process, and transition metal is introduced in situ. elements, while nitrogen was introduced by roasting in an ammonia atmosphere. The nitrogen-doped ordered hierarchical mesoporous carbon material has high active specific surface area and excellent mass transfer performance, and exhibits excellent oxygen reduction catalytic performance and good electrochemical stability. The carbon material of the present invention realizes the application of the binary mixed template method in the preparation of oxygen-reducing carbon-based catalysts for the first time, and has the advantages of good process repeatability, low cost, and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to the application of a nitrogen-doped ordered hierarchical mesoporous carbon catalyst in proton exchange membrane fuel cells. Background technique [0002] Fuel cells have the advantages of fast response speed, high energy conversion efficiency, high energy density, and environmental protection and no pollution. They have bright application prospects in mobile power supplies, fixed power stations, distributed power stations, and military power supplies. After decades of hard work by researchers, the key materials of fuel cells have been broken through and made great progress. However, at present, fuel cells have not been applied in large-scale commercial applications, and their high cost is an important reason. As one of the key materials of fuel cells, platinum-based catalysts have become an important factor hindering the industrialization of fuel cells due to their scarcity a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10H01M4/90
CPCH01M4/90Y02E60/50
Inventor 张华民邓呈维钟和香李先锋张桃桃
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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