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Preparation method and application for nitrogen phosphorus co-doped porous carbon

A technology of co-doping and porous carbon, applied in the fields of materials and energy, can solve problems such as intolerance to carbon monoxide, poor stability, methanol poisoning, etc., and achieve strong methanol resistance, good stability, and strong anti-poisoning ability.

Active Publication Date: 2017-12-01
ZIBO TORCH ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the widely used cathode oxygen reduction catalysts are platinum-based noble metal or non-noble metal catalysts, but most of these metal catalysts have the disadvantages of high price, poor stability, and intolerance to carbon monoxide and methanol poisoning, which are not conducive to large-scale commercialization Applications

Method used

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  • Preparation method and application for nitrogen phosphorus co-doped porous carbon
  • Preparation method and application for nitrogen phosphorus co-doped porous carbon
  • Preparation method and application for nitrogen phosphorus co-doped porous carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A preparation method of nitrogen and phosphorus co-doped porous carbon, comprising the following steps:

[0037] 1) Preparation of precursor copolymer: Weigh 3 mmol of melamine and add it to 20 mL of deionized water, stir well, add 1 mmol of adenosine triphosphate, stir well and add hydrochloric acid dropwise to adjust the pH value of the precursor copolymer to 3.0, so that the copolymer is white Gel-like, the product was freeze-dried to obtain a white fluffy powder.

[0038] 2) Preparation of nitrogen-phosphorous co-doped porous carbon material: put the precursor copolymer prepared in step 1) into a tube furnace, -1 The heating rate was increased to 900°C for 2 hours to prepare nitrogen and phosphorus co-doped porous carbon.

Embodiment 2

[0040] A preparation method of nitrogen and phosphorus co-doped porous carbon, comprising the following steps:

[0041] 1) Preparation of precursor copolymer: Weigh 3mmol melamine and add it to 25mL deionized water, stir well, add 2mmol adenosine triphosphate, stir well and add hydrochloric acid dropwise to adjust the pH value of the copolymer to 2.5, so that the copolymer is a white gel The product was freeze-dried to obtain a white fluffy powder.

[0042] 2) Preparation of nitrogen-phosphorous co-doped porous carbon material: put the precursor copolymer prepared in step 1) into a tube furnace, and heat it at 1.5°C min -1 The heating rate was raised to 1000°C and calcined for 1.5h to prepare nitrogen and phosphorus co-doped porous carbon.

Embodiment 3

[0044] A preparation method of nitrogen and phosphorus co-doped porous carbon, comprising the following steps:

[0045] 1) Preparation of precursor copolymer: Weigh 3mmol melamine and add it to 30mL deionized water, stir well, add 3mmol adenosine triphosphate, stir well and add hydrochloric acid dropwise to adjust the pH value of the copolymer to 2.5, until the copolymer becomes a white gel The product was freeze-dried to obtain a white fluffy powder.

[0046] 2) Preparation of nitrogen-phosphorus co-doped porous carbon material: put the precursor copolymer prepared in step 1) into a tube furnace, and heat it at 2.5°C min -1 The heating rate was increased to 700°C for 2.5h to prepare nitrogen and phosphorus co-doped porous carbon.

[0047] Electrocatalytic oxygen reduction test, including the following steps:

[0048]1) The glassy carbon electrode (3 mm in diameter) is processed through the following steps: first, it is ground and polished with 0.3 μm alumina powder to obtai...

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Abstract

The invention relates to a preparation method and an application for nitrogen phosphorus co-doped porous carbon. A precursor copolymer is self-assembled through a one-step method; and high-temperature roasting is performed to prepare the nitrogen phosphorus co-doped porous carbon. A prepared catalyst material is obvious in porous structure and large in specific surface area; and more catalytic active sites are exposed, so that the electro-catalysis oxygen reduction activity can be improved. The preparation method for performing precursor copolymerization by using simple weak interaction to further synthesize a material with a certain morphology is simple in step and easy in operation; and a synthesis mechanism of the preparation method has an important enlightening effect for large-scale design synthesis of a nanometer material in the future and application of the material to the research of the fields of electro-catalysis, supercapacitors, adsorption separation and the like.

Description

technical field [0001] The invention belongs to the technical field of materials and energy, and in particular relates to a preparation method and application of nitrogen and phosphorus co-doped porous carbon. Background technique [0002] Due to the characteristics of large specific surface area, rich pore structure, good electrical conductivity, high catalytic activity, and good stability, porous carbon materials have become a research hotspot in many fields such as fuel cells, supercapacitors, and adsorption and separation. In recent years, a large number of literatures have reported the preparation of porous carbon materials with different pore structures by soft / hard template method and catalytic activation method. For example, the Chinese patent "A nitrogen-phosphorus co-doped porous carbon catalyst and its preparation method", its application number is: 201510888720.0, the Chinese patent "A porous phosphorus-nitrogen co-doped carbon material and its preparation method...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/96B82Y30/00
CPCB82Y30/00H01M4/9091H01M4/96Y02E60/50
Inventor 王晓涵赵艳红林双吴涛战祥连
Owner ZIBO TORCH ENERGY
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