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Carbon-supported cobalt oxide catalyst and preparation and application thereof

A cobalt oxide and catalyst technology, which is applied in the field of new non-platinum catalysts, can solve the problems of unfavorable batch preparation of the preparation process, waste of energy consumption, etc., and achieve the effects of improving the efficiency of the oxygen reduction reaction, simplifying the preparation process, and reducing the cost of the catalyst

Active Publication Date: 2015-01-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional M / N / C system catalysts have shown certain potential in terms of activity and stability, their preparation involves high-temperature heat treatment, which is a huge waste of energy consumption, and the cumbersome preparation process is not conducive to batch preparation.

Method used

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  • Carbon-supported cobalt oxide catalyst and preparation and application thereof
  • Carbon-supported cobalt oxide catalyst and preparation and application thereof
  • Carbon-supported cobalt oxide catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, in 600mL 5M HNO 3 Add 10000mg XC-72R carbon powder to the solution, after ultrasonic dispersion for 30 minutes, reflux for 6 hours at 110°C to remove ash and increase surface oxygen-containing groups. After filtration, wash with a large amount of deionized water until the suspension is neutral, and filter again Dry for 12h at 120℃ in a blast oven.

[0020] Weigh 500 mg of the carbon powder after the above treatment, and disperse it in 200 mL of ethanol, while adding 1 mL of NH with a mass concentration of 25% 3 H 2 O, after stirring evenly, transfer the mixture to a 2L reactor and react at 160°C for 3 hours. After the solvent was removed by rotary evaporation, it was dried in a blast oven at 80°C for 12 hours to obtain the treated XC-72R carbon carrier.

[0021] Take 80 mg of the XC-72R carbon carrier after the above treatment and add it to 20 mL of ethanol, and ultrasonically disperse it evenly. At the same time, 0.5g of cobalt acetate was added to a 250mL three-nec...

Embodiment 2

[0025] First, in 600mL 5M HNO 3 Add 10000mg XC-72R carbon powder to the solution, after ultrasonic dispersion for 30 minutes, reflux for 6 hours at 110°C to remove ash and increase surface oxygen-containing groups. After filtration, wash with a large amount of deionized water until the suspension is neutral, and filter again Dry for 12h at 120℃ in a blast oven.

[0026] Weigh 500 mg of the carbon powder after the above treatment, and disperse it in 200 mL of ethanol, while adding 1 mL of NH with a mass concentration of 25% 3 H 2 O, after stirring evenly, transfer the mixture to a 2L reactor and react at 160°C for 3 hours. After the solvent was removed by rotary evaporation, it was dried in a blast oven at 80°C for 12 hours to obtain the treated XC-72R carbon carrier.

[0027] Take 80 mg of the XC-72R carbon carrier after the above treatment and add it to 20 mL of ethanol, and ultrasonically disperse it evenly. At the same time, 0.5g of cobalt acetate was added to a 250mL three-nec...

Embodiment 3

[0030] First, in 600mL 5M HNO 3 Add 10000mg XC-72R carbon powder to the solution, after ultrasonic dispersion for 30 minutes, reflux for 6 hours at 110°C to remove ash and increase surface oxygen-containing groups. After filtration, wash with a large amount of deionized water until the suspension is neutral, and filter again Dry for 12h at 120℃ in a blast oven.

[0031] Weigh 500 mg of the carbon powder after the above treatment, and disperse it in 200 mL of ethanol, while adding 1 mL of NH with a mass concentration of 25% 3 H 2 O, after stirring evenly, transfer the mixture to a 2L reactor and react at 160°C for 3 hours. After the solvent was removed by rotary evaporation, it was dried in a blast oven at 80°C for 12 hours to obtain the treated XC-72R carbon carrier.

[0032] Take 80 mg of the XC-72R carbon carrier after the above treatment and add it to 20 mL of ethanol, and ultrasonically disperse it evenly. At the same time, 0.5g of cobalt acetate was added to a 250mL three-nec...

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Abstract

The invention relates to a carbon-supported cobalt oxide catalyst. The carbon-supported cobalt oxide catalyst is characterized in that the cobalt oxide is one or more than two of Co3O4, CoO (OH) and Co2O3. Compared with the prior art, the preparation of the carbon-supported cobalt oxide catalyst, provided by the invention, has the advantages that the high-heat treatment preparation route is abandoned, the surface of a carbon support is modified through solvothermal reaction at extremely low temperature, a transition metallic oxide is supported at room temperature, and the oxygen reduction reaction close to the 4e-process can be realized on the surface of the prepared catalyst; and the catalyst improves the oxygen reduction reaction, simplifies the catalyst preparation process, decreases the catalyst cost, and plays an important role in the commercialized development of fuel cells.

Description

Technical field [0001] The invention relates to a new type of non-platinum catalyst, in particular to a metal-air fuel cell oxygen reduction catalyst, an alkaline anion exchange membrane fuel cell oxygen reduction catalyst, or other oxygen reduction catalysts under alkaline conditions. [0002] The present invention also relates to the preparation method of the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst. Background technique [0004] The oxygen reduction reaction is a very important process in fuel cells, metal-air batteries, and even the chlor-alkali industry. Studies have shown that the mechanism of oxygen reduction is related to electrode materials and reaction media. Pt-based materials are widely used as fuel cell cathode oxygen reduction catalysts, but their expensive price and scarce sources limit the commercialization of fuel cells. In recent years, due to the development of anion exchange membran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75H01M4/90
CPCY02E60/50
Inventor 孙公权刘静姜鲁华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI