Nitrogen-sulfur co-doping carbon material with electro-catalysis oxygen reduction activity on acid and alkali conditions and preparation method

A nitrogen-sulfur co-doping, electrocatalytic oxygen technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of unsatisfactory oxygen reduction performance of fuel cell cathodes, and achieve the effect of high specific surface area and rich pore structure

Inactive Publication Date: 2015-12-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the specific surface area of ​​the material obtained by this method is relatively large, the oxygen reduction performance of the fuel cell cathode is not ideal, and only the electrocatalytic performance of oxygen reduction under alkaline conditions has been reported. Due to the low performance under acid

Method used

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  • Nitrogen-sulfur co-doping carbon material with electro-catalysis oxygen reduction activity on acid and alkali conditions and preparation method
  • Nitrogen-sulfur co-doping carbon material with electro-catalysis oxygen reduction activity on acid and alkali conditions and preparation method
  • Nitrogen-sulfur co-doping carbon material with electro-catalysis oxygen reduction activity on acid and alkali conditions and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put 5g of clean chicken feathers into the lining of the reactor, pour 50g of analytically pure ammonia water (the mass ratio of chicken feathers to ammonia water is 1:10), and conduct a hydrothermal reaction at 150°C for 3h. After the hydrothermal kettle is cooled to room temperature, the ammonia solution in which the polypeptide is dissolved is heated in an electric furnace to remove ammonia, and then placed in an oven at 110°C until it is dried, and the obtained solid is ground with a mortar to obtain a solid powdery polypeptide. Weigh 2.5g of the above polypeptide powder into a beaker, add 60ml of methanol for ultrasonic dissolution (the mass ratio of polypeptide to methanol is 1:19), weigh 1.48g of zinc nitrate Zn(NO 3 ) 2 ·6H 2 O was poured into the above solution and stirred to obtain a suspension (that is, the mass ratio of the ligand to the complexing agent was 1:0.59), and the measured pH value of the suspension was about 4.15. The suspension was uniformly st...

Embodiment 2

[0040] Put 4g of clean chicken feathers into the lining of the reactor, pour 60g of analytically pure ammonia water (the mass ratio of chicken feathers to ammonia water is 1:15), and conduct a hydrothermal reaction at 150°C for 3h. After the hydrothermal kettle is cooled to room temperature, the ammonia solution in which the polypeptide is dissolved is heated in an electric furnace to remove ammonia, and then placed in an oven at 110°C until it is dried, and the obtained solid is ground with a mortar to obtain a solid powdery polypeptide. Weigh 2.5g of the above polypeptide powder into a beaker, add 55ml of methanol for ultrasonic dissolution (the mass ratio of polypeptide to methanol is 1:17.4), weigh 2.32g of zinc nitrate Zn(NO 3 ) 2 ·6H 2 O was poured into the above solution and stirred to obtain a suspension (that is, the mass ratio of the ligand to the complexing agent was 1:0.93), and 1M HNO was slowly added dropwise under the condition of magnetic stirring. 3 , and me...

Embodiment 3

[0043] Put 5g of clean chicken feathers into the lining of the reactor, pour 60g of analytically pure ammonia water (the mass ratio of chicken feathers to ammonia water is 1:12), and conduct a hydrothermal reaction at 140°C for 4h. After the hydrothermal kettle is cooled to room temperature, the ammonia solution in which the polypeptide is dissolved is heated in an electric furnace to remove ammonia, and then placed in an oven at 110°C until it is dried, and the obtained solid is ground with a mortar to obtain a solid powdery polypeptide. Weigh 2.5g of the above polypeptide powder in a beaker, add 50ml of methanol for ultrasonic dissolution (the mass ratio of polypeptide to methanol is 1:15.8), weigh 1.48g of zinc nitrate Zn (NO 3 ) 2 ·6H 2 O was poured into the above solution and stirred to obtain a suspension (that is, the mass ratio of the ligand to the complexing agent was 1:0.59), and 1M HNO was slowly added dropwise under the condition of magnetic stirring. 3 , and mea...

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Abstract

The invention discloses a nitrogen-sulfur co-doping carbon material with electro-catalysis oxygen reduction activity on acid and alkali conditions and a preparation method, and belongs to the technical field of novel material application. The method comprises the technological processes that clean animal hair is put into a reaction kettle liner, analytic pure ammonia water is added, a hydrothermal degradation reaction is performed, hydrothermal degradation is performed on the obtained solution, drying is performed and then grinding is performed to obtain biological organic solid powder; the solid powder is dissolved into methyl alcohol, then zinc nitrate is added, and the obtained suspension is magnetically stirred evenly and then poured into the reaction kettle liner; after the solvothermal process is finished, centrifugal separation is performed to obtain a metal organic coordination polymer which is used as a precursor, and heat treatment is performed on the precursor at the inert atmosphere; an obtained sample is cleaned with diluted hydrochloric acid, and suction filtration and drying are performed to obtain the nitrogen-sulfur co-doping carbon material. The material has the large specific surface area and the abundant hole structure. The nitrogen-sulfur co-doping carbon material obtained through the method has the excellent performance on fuel cell cathode oxygen reduction catalysis on the acid and alkali conditions.

Description

technical field [0001] The invention relates to a nitrogen-sulfur co-doped carbon material with electrocatalytic oxygen reduction activity under acid and alkali conditions and a preparation method thereof, belonging to the field of new materials. Background technique [0002] Doped carbon materials have the advantages of good stability, methanol resistance and low price. They are currently very popular materials in the field of fuel cell cathode materials, but their electrocatalytic performance needs to be improved, especially under acidic conditions. Studies have shown that the synergistic effect between heteroelements helps to improve the oxygen reduction performance of materials. Many of the precursors currently used for synthesizing co-doping are toxic organic substances, and the preparation methods of carbon materials are usually based on relatively harsh conditions, such as: high-voltage arc discharge, laser ablation, chemical vapor deposition, catalytic heat treatment...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/96
CPCH01M4/90H01M4/96Y02E60/50
Inventor 彭峰方雅君王红娟余皓
Owner SOUTH CHINA UNIV OF TECH
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