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Preparation method and application of nitrogen and oxygen co-doped carbon material containing 3d metal single atom

A carbon material and co-doping technology, which is applied in the preparation/purification of carbon, electrodes, electrolysis process, etc., can solve the problems of poor selectivity and activity, complex preparation methods, etc., to achieve uniform morphology, good repeatability, simple craftsmanship

Active Publication Date: 2022-03-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex preparation methods, poor selectivity and activity in the prior art, and proposes a method containing 3d metal single atoms and nitrogen, Preparation method and application of oxygen co-doped carbon material

Method used

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  • Preparation method and application of nitrogen and oxygen co-doped carbon material containing 3d metal single atom
  • Preparation method and application of nitrogen and oxygen co-doped carbon material containing 3d metal single atom
  • Preparation method and application of nitrogen and oxygen co-doped carbon material containing 3d metal single atom

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A method for preparing a carbon material containing cobalt single atoms and nitrogen and oxygen co-doped, comprising the following steps:

[0042] (1) Get 1g ethylenediaminetetraacetic acid, 2g potassium hydroxide, 0.1225g cobalt acetate tetrahydrate, and grind evenly;

[0043] (2) Transfer the reagents in step (1) to the ark, then transfer to a tube furnace, and calcine in an argon atmosphere at a heating rate of 5°C / min, raise the temperature to 700°C, and calcine for 2 hours;

[0044] (3) The sample calcined in the step (2) is taken out, centrifugally washed three times with 0.05mol / L hydrochloric acid, three times centrifugally washed with deionized water;

[0045] (4) Put the sample in step (3) into a vacuum oven to dry for 10 h.

[0046] The SEM of the carbon material containing cobalt single atom and nitrogen, oxygen co-doped that adopts embodiment 1 preparation is as figure 1 As shown, it can be seen from the figure that the carbon material is distributed in a...

Embodiment 2

[0048] A method for preparing a carbon material containing cobalt single atoms and nitrogen and oxygen co-doped, comprising the following steps:

[0049] (1) Get 2g ethylenediaminetetraacetic acid, 4g potassium hydroxide, 0.245g cobalt acetate tetrahydrate, and grind evenly;

[0050] (2) Transfer the reagents in step (1) to the ark, then transfer to a tube furnace, and calcinate in an argon atmosphere at a heating rate of 5°C / min, raise the temperature to 700°C, and calcinate for 2 hours;

[0051] (3) The sample calcined in the step (2) is taken out, centrifugally washed three times with 0.05mol / L hydrochloric acid, three times centrifugally washed with deionized water;

[0052] (4) Put the sample in step (3) into a vacuum oven to dry for 10 h.

Embodiment 3

[0054] A method for preparing a carbon material containing iron single atoms and nitrogen and oxygen co-doped, comprising the following steps:

[0055] (1) Get 1g ethylenediaminetetraacetic acid, 2g potassium hydroxide, 0.2g iron acetylacetonate, grind evenly;

[0056](2) Transfer the reagents in step (1) to the ark, then transfer to a tube furnace, and calcine in an argon atmosphere at a heating rate of 5°C / min, raise the temperature to 700°C, and calcine for 2 hours;

[0057] (3) The sample calcined in the step (2) is taken out, centrifugally washed three times with 0.05mol / L hydrochloric acid, three times centrifugally washed with deionized water;

[0058] (4) Put the sample in step (3) into a vacuum oven to dry for 10 h.

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Abstract

The invention relates to a preparation method and application of a nitrogen and oxygen co-doped carbon material containing 3d metal monatomic, and the method comprises the following steps: mixing ethylenediaminetetraacetic acid or derivatives and hydroxides of ethylenediaminetetraacetic acid and 3d metal salts, calcining at high temperature, centrifugally washing, and drying to obtain the nitrogen and oxygen co-doped carbon material containing 3d metal monatomic. The method is simple and easy to implement, saves energy and is low in cost, the prepared carbon material is uniform in morphology and good in repeatability, the carbon material shows good electro-catalysis performance, when the carbon material serves as an electro-catalyst for producing hydrogen peroxide through oxygen reduction, the electro-catalysis initial potential of the carbon material reaches 0.75 V compared with a reversible hydrogen electrode, the molar selectivity exceeds 95%, and the carbon material has a good application prospect. And the catalyst shows high activity and high selectivity in a reaction for producing hydrogen peroxide through oxygen reduction.

Description

technical field [0001] The invention belongs to the field of chemical materials and catalysis, and specifically relates to a preparation method and application of a carbon material containing 3d metal single atoms and nitrogen and oxygen co-doped. Background technique [0002] Hydrogen peroxide is widely used in many fields such as chemical industry, medical and health care, printing and dyeing industry, and daily life. It can not only be used as a raw material for chemical synthesis, but also as a bactericidal disinfectant, bleaching agent, etc. The current market demand The volume has exceeded 4 million tons, and this demand is showing an obvious growth trend. At present, the industrial production of hydrogen peroxide is through the ethylanthraquinone method. This method has complex procedures, large energy consumption, and by-products, which is not conducive to the promotion of environmental protection and resource conservation. However, electrocatalytic oxygen reduction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C25B1/30C25B1/50C25B11/091C25B11/052
CPCC01B32/05C25B1/30C25B1/50C25B11/091C25B11/052Y02E60/50
Inventor 陈光需郑远杰
Owner SOUTH CHINA UNIV OF TECH
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