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Method for preparing phosphorus-ordered mesoporous carbon carrier and fuel-cell catalyst containing the carrier

A technology of mesoporous carbon and catalyst carrier, which is applied in the direction of catalyst carrier, molecular sieve catalyst, physical/chemical process catalyst, etc. It can solve the problems of poor mesoscopic structure and achieve controllable shape, small shrinkage of mesoscopic structure, and pore size Increased effect

Inactive Publication Date: 2012-08-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordered mesoscopic structure of the material prepared by this method is poorly maintained.

Method used

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  • Method for preparing phosphorus-ordered mesoporous carbon carrier and fuel-cell catalyst containing the carrier
  • Method for preparing phosphorus-ordered mesoporous carbon carrier and fuel-cell catalyst containing the carrier
  • Method for preparing phosphorus-ordered mesoporous carbon carrier and fuel-cell catalyst containing the carrier

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preparation example Construction

[0024] A preferred embodiment in the synthetic method of P-OMC catalyst carrier, comprises the steps: the inorganic acid containing phosphorus is H 3 PO 4 , the water-soluble resin is formaldehyde phenolic resin, and the ordered mesoporous silica is SBA-15. At room temperature, the SBA-15, H 3 PO 4 Mix with formaldehyde phenolic resin according to the mass ratio (1:0.01:0.5) and then fully stir for 1-5h to react to obtain a milky white solution; vacuum polymerize at 80-120°C for 1-4h; obtain phosphorus-containing dark brown powder in an inert atmosphere The temperature is raised from 30°C to 700°C-900°C at a temperature of 1-3°C / min, followed by calcination for 2-5h, and one-step high-temperature carbonization to obtain a phosphorus-ordered mesoporous carbon silicon (P-OMCSi) composite; Then impregnate with 5-20% hydrofluoric acid for 10-30 hours, wash until neutral, and dry in vacuum to obtain the P-OMC composite of the present invention.

[0025] A preferred embodiment o...

Embodiment 1

[0028] Preparation of SBA-15: 4.0g block copolymer P123 (EO 20 PO 70 EO 70 ), 105ml of water, 20ml of hydrochloric acid (37%) and 8.5g of ethyl orthosilicate were mixed, stirred and reacted at 38°C for 2h, then hydrothermally reacted in an oven at 130°C for 24h, and finally roasted at 550°C for 5h in an air atmosphere.

Embodiment 2

[0030] Synthesis of water-soluble resin precursor solution: 8.0g phenol was heated in a 42°C water bath to become transparent, slowly added 14.16g formaldehyde and 0.34g sodium hydroxide (20%) solution, refluxed at 70°C for 60min, cooled to room temperature, and adjusted pH to neutral. Distill under pressure at 45°C, cool to room temperature, and prepare 20% ethanol solution.

[0031] Preparation of catalyst support

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Abstract

The invention relates to a method for preparing a phosphorus-ordered meso-porous carbon carrier, as well as a catalyst containing the carrier, which belongs to the technical field of fuel cells. The method comprises the following steps: ordered meso-porous silicon dioxide and water-soluble resin are mixed with phosphorus-containing inorganic salt or acid and then completely react at room temperature; a phosphorus-contained source and the water-soluble resin are polymerized into a cage-shaped pore canal of ordered meso-porous silicon in a vacuum mode, so as to obtain phosphorus-containing doped ordered meso-porous silicon-carbon compound through high-temperature carbonization under the protection of inert atmosphere; rigid silicon oxide is dissolved out through hydrofluoric acid solution, so as to obtain phosphorus-contained doped ordered meso-porous carbon replicating a template meso-porous structure; and KBH4, formaldehyde, NaBH4 and the like are taken as reducing agents so as to load a noble metal catalyst on a P-OMC carrier through the prior liquid-phase reduction method. The electrical conductivity of a catalyst carrier in the invention is remarkably improved; meanwhile, the noble metal catalyst loaded on the carrier obviously improves the electro-catalytic performance to methanol and shows extremely excellent electro-catalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a phosphorus-ordered mesoporous carbon carrier and a fuel cell catalyst containing the carrier, belonging to the technical field of fuel cells. Background technique [0002] Fuel cells have the advantages of less energy loss, low pollution, high energy density, and low noise, and are considered to be the most promising chemical power sources for electric vehicle power and other civilian applications in the future. At present, the key technologies for the preparation of fuel cells, especially proton exchange membrane fuel cells (PEMFC) and direct methanol fuel cells (DMFC), have matured, but in the electrodes of fuel cells, the catalysts generally used are carbon-supported Pt or Pt-based composite catalysts. A fuel cell catalyst having such a structure uses a noble metal catalyst, thus causing an increase in catalyst cost. Therefore, efforts have been made to reduce the amount of noble metal catalysts us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00H01M4/90H01M4/92B01J29/06B01J27/14
CPCY02E60/50
Inventor 梁彦瑜孙志鹏力虎林张校刚
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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