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Preparation method of cobalt nitrogen co-doped biomass carbon oxidation reduction catalyst

A biomass carbon, co-doping technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems that hinder the commercial application of large-scale equipment, poor stability and methanol resistance, and easy fuel. Penetration and other problems, to achieve the effect of low price, good methanol resistance and stability, and ORR performance improvement

Active Publication Date: 2019-01-11
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, although platinum and platinum-based catalysts show high catalytic activity, the disadvantages of high cost, poor stability and methanol resistance, and easy fuel permeation have seriously hindered the commercial application of some large-scale equipment.

Method used

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  • Preparation method of cobalt nitrogen co-doped biomass carbon oxidation reduction catalyst
  • Preparation method of cobalt nitrogen co-doped biomass carbon oxidation reduction catalyst
  • Preparation method of cobalt nitrogen co-doped biomass carbon oxidation reduction catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for co-doping biomass carbon with cobalt and nitrogen to improve the performance of redox catalysts. The preparation of biomass porous carbon materials: using fresh kelp as raw material, freezing with liquid nitrogen, putting it into a vacuum dryer for drying, and crushing through 20 meshes after drying Sieve for use; take the pulverized kelp and add a certain amount of potassium hydroxide to grind and mix thoroughly, put it in a porcelain boat and place it in a high-temperature furnace with a nitrogen flow rate of 1L / min and a heating rate of 5°C / min, and set a certain activation temperature and activation time; after activation The sample was first washed with 10% hydrochloric acid, then washed with deionized water until neutral, and dried by suction to obtain the final sample. Preparation of cobalt nitrogen co-doped biomass porous carbon material: First, take 20 mg of optimized biomass activated carbon, add 6 mL of deionized water to stir and disperse, after ...

Embodiment 2

[0028] A method for co-doping biomass carbon with cobalt and nitrogen to improve the performance of redox catalysts. The preparation of biomass porous carbon materials: using fresh kelp as raw material, freezing with liquid nitrogen, putting it into a vacuum dryer for drying, and crushing through 20 meshes after drying Sieve for use; take the pulverized kelp and add a certain amount of potassium hydroxide to grind and mix thoroughly, put it in a porcelain boat and place it in a high-temperature furnace with a nitrogen flow rate of 1L / min and a heating rate of 5°C / min, and set a certain activation temperature and activation time; after activation The sample was first washed with 10% hydrochloric acid, then washed with deionized water until neutral, and dried by suction to obtain the final sample. Preparation of cobalt nitrogen co-doped biomass porous carbon material: First, take 20 mg of optimized biomass activated carbon, add 6 mL of deionized water to stir and disperse, after ...

Embodiment 3

[0030]A method for co-doping biomass carbon with cobalt and nitrogen to improve the performance of redox catalysts. The preparation of biomass porous carbon materials: using fresh kelp as raw material, freezing with liquid nitrogen, putting it into a vacuum dryer for drying, and crushing through 20 meshes after drying Sieve for use; take the pulverized kelp and add a certain amount of potassium hydroxide to grind and mix thoroughly, put it in a porcelain boat and place it in a high-temperature furnace with a nitrogen flow rate of 1L / min and a heating rate of 5°C / min, and set a certain activation temperature and activation time; after activation The sample was first washed with 10% hydrochloric acid, then washed with deionized water until neutral, and dried by suction to obtain the final sample. Preparation of cobalt nitrogen co-doped biomass porous carbon material: First, take 20 mg of optimized biomass activated carbon, add 6 mL of deionized water to stir and disperse, after 1...

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Abstract

The invention discloses a preparation method of a cobalt nitrogen co-doped biomass carbon oxidation reduction catalyst. The preparation method comprises following steps: biomass porous carbon materialpreparation; vacuum freeze drying; and cobalt nitrogen co-doped biomass carbon porous material preparation. The advantages are that: the raw materials are easily available and cheap; the performanceis close to commercially available platinum-carbon catalyst, an excellent method is provided for development of a non-noble metal catalyst, and effective basis is provided for further experiment optimization and industrial production.

Description

technical field [0001] The invention relates to the technical field of energy and chemical industry, in particular to a method for co-doping biomass carbon with cobalt and nitrogen to improve the performance of redox catalysts. Background technique [0002] Slow redox reaction (ORR) kinetic limitation is a major factor affecting the overall performance of various electrochemical storage and conversion devices. At present, although platinum and platinum-based catalysts show high catalytic activity, their disadvantages such as high cost, poor stability and methanol resistance, and easy fuel permeation have seriously hindered the commercial application of some large-scale equipment. Therefore, developing efficient and stable supported non-noble metal catalysts to replace noble metal catalysts has always been an important research direction in the field of catalysis. [0003] The study found that transition metal-doped carbon materials have the advantages of low cost and high c...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08B01J35/10
CPCB01J27/24B01J37/082B01J37/084B01J35/33B01J35/60
Inventor 邢献军叶聪刘建华李珊张学飞
Owner HEFEI UNIV OF TECH
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