Preparation of nitrogen-doped orderly-graded mesoporous carbon catalyst as well as carbon catalyst and application of carbon catalyst

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, achieve low cost, cost-friendly environment, and avoid doping processing effect

Active Publication Date: 2017-06-20
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 orderly-graded mesoporous carbon catalyst as well as carbon catalyst and application of carbon catalyst
  • Preparation of nitrogen-doped orderly-graded mesoporous carbon catalyst as well as carbon catalyst and application of carbon catalyst
  • Preparation of nitrogen-doped orderly-graded mesoporous carbon catalyst as well as carbon catalyst and application of carbon catalyst

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 down to room temperature, and use dilute HCl solution Adjust the pH value of the solution to 7.0, dry in a vacuum oven at 60°C for 6-12 hours to reduce the water content in the viscous liquid as much as possible, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir for 12 hours, and the precipitated chlorinated Sodium was removed by centrifugation, and finally an ethanol solution of soluble phenolic resin prepolymer with a mass fraction of 25 wt.% was prepared 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 resi...

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 down to room temperature, and use dilute HCl solution Adjust the pH value of the solution to 7.0, dry in a vacuum oven at 60°C for 6-12 hours to reduce the water content in the viscous liquid as much as possible, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir for 12 hours, and the precipitated chlorinated Sodium was removed by centrifugation, and finally an ethanol solution of soluble phenolic resin prepolymer with a mass fraction of 25 wt.% was prepared 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 resi...

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 orderly-graded mesoporous carbon catalyst and application of the nitrogen-doped orderly-graded mesoporous carbon catalyst to proton exchange membrane fuel cells. The catalyst is prepared though a binary mixing template method; a triblock copolymer is used as a soft template agent and one or more of a Y-type molecular sieve, an MCM-41 molecular sieve and a ZSM-5 molecular sieve are used as a hard template agent; soluble resin is used as a carbon source; in a preparation process, a transition metal salt is added and a transition metal element is introduced in situ; meanwhile, a nitrogen element is introduced through roasting in an ammonia atmosphere. The nitrogen-doped orderly-graded mesoporous carbon material provided by the invention has an ordered mesoporous structure (with the size of 3nm to 5nm) generated by soft template induction and a three-dimensional through mesoporous structure (with the size of 10nm to 50nm) generated by hard template etching, has a high-activity specific surface and good mass-transferring performance and has excellent oxygen reduction catalysis performance and good electrochemical stability. By adopting the carbon material provided by the invention, application of the binary mixing template method to preparation of an oxygen reduction carbon-based catalyst is realized for the first time; meanwhile, the carbon material has the advantages of good process repeatability, low cost, good environmental friendliness and the like.

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 Applications(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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