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Nitrogen-sulfur co-doped carbon material with electro-catalytic oxygen reduction activity and preparation method of carbon material

A nitrogen-sulfur co-doping, electrocatalytic oxygen technology, applied in chemical instruments and methods, physical/chemical process catalysts, circuits, etc., can solve problems such as multi-step, labor-intensive, time-consuming, etc. Remove effects with simple steps

Inactive Publication Date: 2015-03-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It not only avoids the loss of heteroelements in the pretreatment stage, but also does not use a strong alkaline template, which reduces the corrosion of the reaction vessel and quartz tube, and avoids the synthesis steps of the hard template. The removal of the template is simple and overcomes the Traditional synthesis of mesoporous carbon materials with hard templates has the disadvantages of time-consuming, laborious and multi-step

Method used

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  • Nitrogen-sulfur co-doped carbon material with electro-catalytic oxygen reduction activity and preparation method of carbon material
  • Nitrogen-sulfur co-doped carbon material with electro-catalytic oxygen reduction activity and preparation method of carbon material
  • Nitrogen-sulfur co-doped carbon material with electro-catalytic oxygen reduction activity and preparation method of carbon material

Examples

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Effect test

Embodiment 1

[0034] Weigh 3g of chicken feathers into a beaker, pour 50ml of acetone into a sonication for 15min, dry in an oven at 110°C, cut the chicken feathers into pieces (about 5mm), pour the broken chicken feathers into the lining of the hydrothermal reaction kettle, add 45g for analysis Pure ammonia water (mass ratio of hair to ammonia water is 1:15), hydrothermal reaction at 120°C for 2 hours. After the reaction kettle is cooled to room temperature, put the ammonia solution in which the amino acid is dissolved in an oven at 110°C until it is dried, and grind the obtained solid with a mortar to obtain solid powder amino acid.

[0035]Weigh 0.4g of the above-mentioned amino acid powder and 0.2g of MgO (that is, the mass ratio of the precursor to the template is 1:0.5), pour both into a mortar, and grind them evenly. Place the mixture in a porcelain boat. The heating rate of the tube furnace was 5°C / min, from room temperature to 700°C, kept at 700°C for 3 hours, and finally cooled t...

Embodiment 2

[0037] Weigh 5g of pig hair into a beaker, pour 50ml of acetone into the ultrasonic for 20min, put it in an oven at 110°C for drying, cut the pig hair into pieces (about 5mm), pour the broken pig hair into the lining of the hydrothermal reaction kettle, add 55g of analytically pure ammonia water (mass ratio of hair to ammonia water is 1:11), hydrothermally reacted at 130°C for 5h. After the reaction kettle is cooled to room temperature, put the ammonia solution in which the amino acid is dissolved in an oven at 110°C until it is dried, and grind the obtained solid with a mortar to obtain solid powder amino acid.

[0038] Weigh 0.3g of the amino acid powder prepared in Example 2 and 0.45g of MgO, that is, the mass ratio of the precursor to the template is 1:1.5, and pour them into a mortar together, and grind them evenly. Place the mixture in a porcelain boat. The heating rate of the tube furnace was 5°C / min, from room temperature to 800°C, kept at 800°C for 2 hours, and final...

Embodiment 3

[0041] Weigh 6g of hair into a beaker, pour 50ml of acetone into the ultrasonic for 25min, put it in an oven at 110°C for drying, cut the hair into pieces (about 5mm), pour the broken hair into the lining of the hydrothermal reaction kettle, add 60g of analytical pure Ammonia water (mass ratio of hair to ammonia water is 1:10), hydrothermal reaction at 150°C for 3 hours. After the reaction kettle is cooled to room temperature, put the ammonia solution in which the amino acid is dissolved in an oven at 110°C until it is dried, and grind the obtained solid with a mortar to obtain solid powder amino acid.

[0042] Weigh 0.5g of the amino acid prepared in Example 3 and 0.5g of MgO, that is, the mass ratio of the precursor to the template is 1:1, and pour them into a mortar together, and grind them evenly. Place the mixture in a porcelain boat. The heating rate of the tube furnace was 5°C / min, from room temperature to 800°C, kept at 800°C for 2 hours, and finally cooled to room te...

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Abstract

The invention provides a nitrogen-sulfur co-doped carbon material with an electro-catalytic oxygen reduction activity and a preparation method of the carbon material, and belongs to the technical field of new material application. The technologic process comprises the following steps: performing ultrasonic cleaning on hairs with acetone, then shearing and crushing the hairs, pouring the hairs into a liner of a reaction kettle, adding analytically pure ammonia water, carrying out a hydrothermal degradation reaction, drying the solution obtained from hydrothermal degradation to obtain solid amino acid, mixing the solid amino acid with a template agent uniformly, thermally decomposing the mixture under an inert atmosphere, removing the template agent with diluted hydrochloric acid from the obtained sample, washing and drying, so as to prepare the nitrogen-sulfur co-doped carbon material. As the carbon material is prepared by taking hairs as the raw materials, the raw materials are simple and accessible, and low in cost; the selected template agent is low in cost and easy to remove; the preparation method is simple in technology; the prepared material is high in nitrogen and sulfur content, and has larger specific surface area, and is rich in pore structures; the nitrogen-sulfur co-doped carbon material prepared by the method shows up excellent properties in fuel cell cathode oxygen reduction and catalysis.

Description

technical field [0001] The invention relates to a method for preparing a nitrogen-sulfur co-doped carbon material with electrocatalytic oxygen reduction activity, belonging to the field of new materials. Background technique [0002] Heteroatom-doped carbon materials (including: single-doped, co-doped, and multi-doped) are currently very popular and important materials in the field of fuel cell cathode materials. Commonly used carbon carriers include carbon black, carbon nanotubes, graphite, graphite oxide, graphene, etc. These materials have one thing in common, they all have very rich π electrons, but these electrons cannot be directly used for oxygen reduction reactions, and heterogeneous The incorporation of atoms can change the electronegativity of the connected carbon atoms, which is beneficial to improve the oxygen reduction performance. Compared with commercial platinum carbon materials, this kind of materials has the advantages of cheap materials, good stability, a...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M4/90
CPCY02E60/50
Inventor 彭峰方雅君钟国玉王红娟余皓
Owner SOUTH CHINA UNIV OF TECH
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