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Method of preparing mesoporous carbon material and application of mesoporous carbon material as noble metal catalyst carrier

A mesoporous carbon and carbonization technology, which is applied in the field of preparing mesoporous carbon materials from soybeans, can solve the problems of low catalyst activity and high catalyst cost, and achieve the effects of improving effective utilization, expanding the interface, and promoting transmission

Inactive Publication Date: 2014-05-21
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, fuel cells are still on the eve of industrialization. The main reason is that the cost of catalysts (Pt-based metals and their alloys) used in fuel cells remains high, the catalyst activity is not high, and the corrosion resistance needs to be further improved.

Method used

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  • Method of preparing mesoporous carbon material and application of mesoporous carbon material as noble metal catalyst carrier
  • Method of preparing mesoporous carbon material and application of mesoporous carbon material as noble metal catalyst carrier
  • Method of preparing mesoporous carbon material and application of mesoporous carbon material as noble metal catalyst carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Preparation of mesoporous carbon materials

[0034] Soybean was crushed and refined by ball milling, then carbonized at 800 °C for 2 h under the protection of inert gas to prepare mesoporous carbon; the mesoporous carbon was ball milled for 4 h. Weigh 2 g of ball-milled mesoporous carbon, add it to 30 ml of acetone, reflux at 60 °C for 2 h, wash, filter to remove residues during the carbonization process; place in a blast oven and dry at 60 °C for 12 h . Add to 30 ml of mixed aqueous solution of nitric acid and hydrogen peroxide (the concentration of nitric acid is 2 mol / L, H 2 o 2 The mass percentage is 3%), stirring at room temperature for 24 h to oxidize the surface of mesoporous carbon; after cleaning and filtering, dry at 60 °C in a blast oven for 12 h. Then, the surface cleaned and oxidized mesoporous carbon was protected by an inert gas, and carbonized for 2 hours at 800°C to make the carbonization more complete; finally, it was added to 30 ml of a mixed aqu...

Embodiment 2

[0038] (1) Preparation of mesoporous carbon materials

[0039] Soybeans were crushed and refined by ball milling, then carbonized at 900°C for 1.5 h under the protection of inert gas to obtain mesoporous carbon; the mesoporous carbon was milled in a ball mill for 4 h. Weigh 2 g of ball-milled mesoporous carbon, add it to 25 ml of acetone, reflux at 60 °C for 2 h, wash and filter to remove residues during the carbonization process; place in a blast oven and dry at 60 °C for 12 h ; Then join in the mixed aqueous solution of nitric acid and hydrogen peroxide of 25 ml (the concentration of nitric acid is 1 mol / L, H 2 o 2 The mass percentage is 5%), stirring at room temperature for 24 h to oxidize the surface of mesoporous carbon; after cleaning and filtering, place in a blast oven and dry at 50 °C for 12 h. Then under the protection of inert gas, secondary carbonization at 900°C for 1.5h to make the carbonization more complete; finally added to 25 ml of mixed aqueous solution of...

Embodiment 3

[0043] (1) Preparation of mesoporous carbon materials

[0044] Soybeans were crushed and refined by ball milling, and then carbonized at 1000 °C for 1 h under the protection of inert gas to obtain mesoporous carbon, which was milled by a ball mill for 4 h. Weigh 2 g of mesoporous carbon and add it to 20 ml of acetone, reflux at 55 °C for 2 h, wash and filter to remove residues during the carbonization process, place in a blast oven, and dry at 60 °C for 12 h. Then add 20 ml of mixed aqueous solution of nitric acid and hydrogen peroxide (concentration of nitric acid is 1 mol / L, H 2 o 2 The mass percentage is 10%), stirring at room temperature for 12 h to oxidize the surface of mesoporous carbon; after cleaning and filtering, dry at 50 °C for 12 h in a blast oven; , to make its carbonization more complete; the product was added to the mixed aqueous solution of 20 ml of nitric acid and hydrogen peroxide (the concentration of nitric acid is 1mol / L, H 2 o 2 The mass percentage ...

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Abstract

The invention provides a method of preparing a mesoporous carbon material. The method comprises the steps of: based on soybean as a raw material, conducting grinding and ball milling, and carrying out thermal treatment and carbonization under the protection of inert gas to prepare mesoporous carbon; washing mesoporous carbon with acetone, filtering to remove residues in carbonization process, drying and treating with mixed water solution of nitric acid and hydrogen peroxide, and oxidizing, cleaning, filtering and drying the surfaces of mesoporous carbon; then conducting thermal treatment and secondary carbonization under the protection of inert gas; and finally conducting atmospheric oxidization treatment to the secondarily-carbonized material with the mixed water solution of nitric acid and hydrogen peroxide, filtering and washing to be neutral, and drying to obtain the mesoporous carbon material. The mesoporous carbon material prepared is large in specific area and high in activity; and when the mesoporous carbon material is used for noble metal catalyst carriers, the effective utilization ratio of the catalyst can be greatly improved, and the usage amount of noble metal and the cost of catalyst can be reduced.

Description

Technical field [0001] The present invention involves a preparation method for the carbon material, especially the method of using soybeans to prepare the carbon material of soybean; the present invention also involves the application of the mesh carbon material as the precious metal catalyst carrier. Background technique [0002] The fuel cell can directly convert chemical energy in fuel and oxidant into electrical energy without burning, so the conversion efficiency can be as high as 60%to 80%, which is considered to be the ultimate form of human use of energy.However, fuel cells are currently on the eve of industrialization. The main reason is that the cost of catalyst (PT fund belongs and its alloy) applied to fuel cells is high, catalyst activity is not high, and corrosion resistance needs to be further improved.Therefore, the focus of fuel cell research should be the development of catalyst technology, reducing costs, and breaking the application bottleneck of fuel cells. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B01J32/00B01J21/18B01J23/42B01J23/46B01J23/89C01B32/05
Inventor 王荣方周田宝王辉
Owner NORTHWEST NORMAL UNIVERSITY
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