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A supported hollow spherical carbon material, its preparation method and its application in electrocatalysis

A hollow ball, load-carrying technology, applied in the direction of circuits, electrical components, battery electrodes, etc.

Active Publication Date: 2021-04-23
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 method has few steps, low energy consumption, green and non-polluting, and is simple and feasible, there is a certain gap between the electrochemical activity of the catalyst in alkaline electrolyte and acidic electrolyte compared with commercial 20wt.%Pt / C

Method used

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  • A supported hollow spherical carbon material, its preparation method and its application in electrocatalysis
  • A supported hollow spherical carbon material, its preparation method and its application in electrocatalysis
  • A supported hollow spherical carbon material, its preparation method and its application in electrocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of hollow spherical carbon carrier

[0036] Add 0.5 mL of tetraethyl orthosilicate to the mixed solution containing 10 mL of ethanol and 30 mL of 1M KOH, then add 100 mg of L-dopamine, stir at 500 rpm for 6 h, centrifuge at 10000 rpm for 5 min and wash with water three times, 80 ℃ drying for 12h, at a gas flow rate of 60mLmin -1 and a heating rate of 2°C min -1 Under an argon atmosphere at 800°C for 2 hours; then wash with 200mL, 1.5M NaOH at 60°C for 12 hours to remove the template, and wash to neutral to obtain a hollow spherical carbon carrier;

[0037] Such as figure 1 , the transmission electron microscope picture of the hollow spherical carbon carrier prepared in Example 1, the electron microscope shows that the particle size of the carbon carrier is uniform, and the size distribution range is 200-300nm;

[0038] (2) Preparation of supported catalyst

[0039] Dissolve 15 mg of hemin in 150 mL of dichloromethane solvent, add 150 mg of the hollow...

Embodiment 2

[0043] (1) Preparation of hollow spherical carbon carrier

[0044] Add 0.5mL of methyl orthosilicate to the mixture containing 20mL of ethanol and 40mL of 2M KOH, then add 250mg of dihydroxyphenylpropyl methacrylamide, stir for 6h at a stirring rate of 600rpm, and centrifuge at a rate of 10000rpm Centrifuge for 5min and wash with water three times, dry at 80°C for 12h, at a gas flow rate of 60mLmin -1 and a heating rate of 2°C min -1 800°C constant temperature for 2 hours under the ammonia atmosphere; and then washed with 200mL, 2M NaOH at 40°C for 12 hours to remove the template, and then washed to neutral to obtain the hollow spherical carbon carrier;

[0045] (2) Preparation of supported catalyst

[0046] Dissolve 20 mg of vitamin B12 in 150 mL of ethanol, add 150 mg of the hollow spherical carbon carrier prepared in (1), ultrasonicate for 30 min, and spin evaporate at room temperature. -1 and a heating rate of 10°C min -1 In a helium atmosphere, keep the temperature at...

Embodiment 3

[0048] (1) Preparation of hollow spherical carbon carrier

[0049] After adding 1.5 mL of tetraethyl orthosilicate to a mixture containing 12 mL of ethanol and 12 mL of 2M ammonia water, add 200 mg of L-dopamine, stir at 600 rpm for 12 h, centrifuge at 13000 rpm for 3 min, and wash with water three times. Dry at 80°C for 12h, at a gas flow rate of 80mLmin -1 and a heating rate of 5°C min -1 Under a nitrogen atmosphere at 1000°C for 0.5h; then wash with 200mL, 1.5M KOH at 30°C for 24h to remove the template and wash to neutral to obtain a hollow spherical carbon carrier;

[0050] (2) Preparation of supported catalyst

[0051] Dissolve 70 mg of iron phthalocyanine in 150 mL of dichloromethane solvent, add 200 mg of the hollow spherical carbon carrier prepared in (1) and carry out ultrasonication for 50 min. -1 and a heating rate of 5°C min -1 In an ammonia atmosphere at 900°C for 2 hours, then pickled with 200 mL of 1M HCl at 80°C for 3 hours to remove impurities, and washed...

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Abstract

The invention relates to the preparation of a supported hollow spherical carbon material and its electrocatalytic performance application. The metal macrocyclic complex is supported by the hollow spherical carbon material as a carrier. The catalyst preparation method includes: (1) adding a certain amount of template agent into ethanol and alkali solution, then adding dopamine hydrochloride and its derivatives, stirring, centrifuging, drying, high temperature treatment, alkali washing to remove the template, and washing to After neutral drying, the hollow spherical carbon carrier is obtained; (2) the transition metal macrocyclic complex is dissolved or dispersed in an organic solvent, mixed with the hollow spherical carbon carrier prepared in (1), and subjected to ultrasonication, rotary steaming, high-temperature roasting, Impurities were removed by acid washing, and the supported non-precious metal electrocatalyst was obtained after washing with water to neutrality. The advantages of the present invention are that the preparation method is simple and easy to control, and is easy to be applied on a large scale. The prepared non-precious metal catalyst has high oxygen reduction catalytic activity, selectivity and methanol poisoning resistance while reducing the cost, so it has broad application prospects.

Description

technical field [0001] The invention belongs to the field of composite material preparation and fuel cell catalysts, and relates to the preparation of a supported hollow spherical carbon material and the application of its electrocatalytic performance. Background technique [0002] Since the beginning of the 21st century, energy shortage and environmental pollution have become two major problems facing this century, and the whole world has begun to devote itself to the research and development of safe and clean new energy technologies. In this general environment, fuel cells, as a power generation device that directly converts chemical energy into electrical energy, stand out in various fields due to their cleanness, safety, independence from fossil energy, high power generation efficiency, low pollution, and low noise. , making it one of the most effective new energy technologies, and was hailed as "the first high-tech in the 21st century" by the American Time Magazine. As...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90
CPCH01M4/8605H01M4/9083Y02E60/50
Inventor 金新新谢妍黄家辉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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