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Cobalt-nitrogen co-doped porous carbon material and preparation and application thereof

A porous carbon material, co-doping technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of poor conductivity, limitation, low volume activity, etc., to improve carbon yield and nitrogen fixation rate, aerobic reduction catalysis Activity and cycle stability, effect of simple preparation process

Inactive Publication Date: 2018-11-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they still have problems such as poor conductivity, low volume activity, and unclear mechanism, which limit their commercialization process.

Method used

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  • Cobalt-nitrogen co-doped porous carbon material and preparation and application thereof
  • Cobalt-nitrogen co-doped porous carbon material and preparation and application thereof
  • Cobalt-nitrogen co-doped porous carbon material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Prepare 15ml of sodium chloride solution with saturated concentration (5.4g / 15mL) in deionized water.

[0039] (2) Disperse 1 g of riboflavin in the above solution, and ultrasonically disperse to make it evenly mixed.

[0040] (3) Add 0.05 g of cobalt acetate in addition to allow it to fully dissolve.

[0041] (4) Pour 30mL of liquid nitrogen into the solution of (3) and let stand for 10min.

[0042] (5) Transfer the system (4) into a freeze dryer for drying and then dry it in a vacuum oven at 80° C. for 48 hours to obtain the corresponding carbonized precursor.

[0043] (6) The sample was carbonized at 800°C for 2 hours under an argon atmosphere, then washed with dilute hydrochloric acid and deionized water, and finally the solid powder was left by suction filtration and dried in a vacuum oven to obtain the corresponding cobalt-nitrogen co-doped catalyst.

Embodiment 2

[0045] (1) Prepare 15ml of sodium chloride solution in deionized water with a concentration of 3g / 15ml.

[0046] (2) Disperse 1 g of riboflavin in the above solution, and ultrasonically disperse to make it evenly mixed.

[0047] (3) Add 0.05 g of cobalt acetate in addition to allow it to fully dissolve.

[0048] (4) Pour 30mL of liquid nitrogen into the solution of (3) and let stand for 10min.

[0049] (5) Transfer the system (4) into a freeze dryer for drying and then dry it in a vacuum oven at 80° C. for 48 hours to obtain the corresponding carbonized precursor.

[0050] (6) The sample was carbonized at 800°C for 2 hours under an argon atmosphere, then washed with dilute hydrochloric acid and deionized water, and finally the solid powder was left by suction filtration and dried in a vacuum oven to obtain the corresponding cobalt-nitrogen co-doped catalyst.

Embodiment 3

[0051] Embodiment 3 (comparative example)

[0052](1) Disperse 1 g of riboflavin in 15 ml of water, and ultrasonically disperse to mix evenly.

[0053] (2) Add 0.05 g of cobalt acetate in addition to allow it to fully dissolve.

[0054] (3) Pour 30mL of liquid nitrogen into the solution of (3) and let stand for 10min.

[0055] (5) Transfer the system (4) into a freeze dryer for drying and then dry it in a vacuum oven at 80° C. for 48 hours to obtain the corresponding carbonized precursor.

[0056] (6) The sample was carbonized at 800°C for 2 hours under an argon atmosphere, then washed with dilute hydrochloric acid and deionized water, and finally the solid powder was left by suction filtration and dried in a vacuum oven to obtain the corresponding cobalt-nitrogen co-doped catalyst.

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Abstract

The invention relates to a cobalt-nitrogen co-doped porous carbon material, and preparation and application thereof. Riboflavin which is cheap, environmentally friendly and commercialized is simultaneously used as a carbon source and a nitrogen source. The riboflavin and cobalt acetate are dissolved into a saturated solution of sodium chloride that is a pore-forming agent at the same time, and then freeze-drying and carbonization are performed to obtain the cobalt-nitrogen co-doped porous carbon material. By utilization a pore-forming function of molten sodium chloride salt, a multi-stage porestructure is prepared, the carbon material having a special morphology can be prepared, and the oxygen reduction catalytic performance of the carbon material can be fully exerted. A simple route forpreparing a non-metal oxygen reduction catalytic material is provided and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of porous carbon materials and their preparation and application, in particular to a cobalt-nitrogen co-doped porous carbon material and its preparation and application. Background technique [0002] With the development of science and technology and social progress, the concept of clean energy has gradually entered people's lives, and the research on related conversion devices has become a hot spot in the field of scientific research. As a new type of clean energy conversion equipment, fuel cells have attracted widespread attention due to their advantages such as simple device, small size, easy portability, and high energy density, and are expected to solve key technical problems in the energy field. However, the slow kinetics of oxygen reduction (ORR) in fuel cell cathodes, as well as the high Pt price and low platinum utilization, severely hinder their commercialization for large-scale applications. Because the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9091Y02E60/50
Inventor 刘天西朱天宜张超郑勇陈山
Owner DONGHUA UNIV
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