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Catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon, and preparation method and application of catalyst

A carbon nanotube and carbon nanotube composite technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as differences in catalytic activity, and achieve the effects of low cost, high activity specific surface area, and high conductivity

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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  • Catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon, and preparation method and application of catalyst
  • Catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon, and preparation method and application of catalyst
  • Catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon, and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of phenolic resin prepolymer:

[0042] 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 minimize the water content in the viscous liquid, dissolve the obtained soluble phenolic resin prepolymer in ethanol and stir for 12 hours, and dissolve 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.

[0043] (2) Preparation of ordered mesoporous carbon in situ growth carbon nanotube composite catalyst

[0044] Dissolve 0.8g of F127 in 20g of ethanol, stir until clear and transparent, then add 4g of phenolic r...

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 ordered mesoporous carbon in situ growth carbon nanotube composite catalyst

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

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 ordered mesoporous carbon in situ growth carbon nanotube composite catalyst

[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 ...

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Abstract

The invention discloses a catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon, and a preparation method and an application of the catalyst. The composite catalyst is prepared by performing in-situ growth of carbon nanotubes on nitrogen-doped ordered mesoporous carbon; equivalently, a triblock copolymer is used as a soft template agent, and a soluble resin is used as a carbon source; transitional metal salt is added in the preparation process; a transitional metal element is introduced in an in-situ manner; and meanwhile, active points which facilitate growth of the carbon nanotubes are generated under mixed atmosphere of ammonia gas and hydrocarbons based on the transitional metal components introduced in a modifying process of the ordered mesoporous carbon material so as to realize nitridation and growth of carbon nanotubes in one step. The composite catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon has large activity specific surface and high conductivity performance, and shows excellent oxygen reduction catalytic performance and high electrochemical stability.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to the application of an ordered mesoporous carbon in-situ grown carbon nanotube composite catalyst in a proton exchange membrane fuel cell. 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. These advantages make fuel cells recognized as the preferred clean and efficient power generation technology in the 21st century. In recent years, after decades of hard work by researchers, the key materials of fuel cells have been broken through and made great progress. However, fuel cells have not been widely used commercially, and their high cost is an important constraint. [0003] At present, electrocatalysts are the key materials of fuel cells, and their material cost, electrochemical reactivity and long-term operation stability are the biggest obsta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/96
CPCH01M4/9091H01M4/96Y02E60/50
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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