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Preparation method and application of nitrogen and phosphorus co-doped porous carbon materials

A technology of co-doping and carbon materials, applied in chemical instruments and methods, catalyst supports, physical/chemical process catalysts, etc.

Inactive Publication Date: 2016-10-12
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, nitrogen-phosphorus co-doped porous carbon materials with simple synthesis process, large-scale production and promising application prospects have not been related to the technology or literature.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Mix trimethylolpropane, urea and phosphoric acid in a mass ratio of 1:0.1:0.1 as a carbonization precursor, add carbonization activator anhydrous ferric chloride (0.01% of the total mass of carbonization precursor) and grind twelve After 1 hour, conduct a carbonization treatment under nitrogen for 0.5 hours (carbonization temperature is 300 °C, heating rate is 1 °C / min), then soak in 0.1 M nitric acid for 12 hours, and then put it into a ball mill for full grinding Twelve hours, after suction filtration and water washing, put it into a vacuum oven and dry for 10 hours to obtain a non-metallic catalyst composed of nitrogen and phosphorus as a porous carbon material.

[0036] The half-point position of the nitrogen-phosphorous co-doped porous carbon material non-metallic catalyst with the addition of 0.01% carbonization activator was negatively shifted by 15 mV compared with the commercial platinum-carbon catalyst.

Embodiment 2

[0038] Mix pentaerythritol, melamine and red phosphorus in a mass ratio of 1:0.5:2 as a carbonization precursor, add a carbonization activator cobalt chloride (0.1% of the total mass of the carbonization precursor) and grind for twelve hours. Under the second carbonization treatment. First carbonization treatment for 1 hour (carbonization temperature is 400 °C, heating rate 5 °C / min), second carbonization treatment for 1 hour (carbonization temperature is 800 °C, heating rate 5 °C / min), and then soaked in 0.5 M sulfuric acid After being treated for 10 hours, put it into a ball mill to fully grind it for 12 hours, and then put it into a vacuum drying oven to dry for 10 hours after suction filtration and water washing to obtain a non-metallic catalyst composed of nitrogen and phosphorus as a porous carbon material.

[0039] Compared with the commercial platinum-carbon catalyst, the nitrogen-phosphorus co-doped porous carbon material non-metallic catalyst with a carbonization act...

Embodiment 3

[0041] Mix xylitol, polyaniline and sodium hypophosphite in a mass ratio of 1:1:1 as a carbonization precursor, add carbonization activator nickel chloride (1% of the total mass of carbonization precursor), and grind for twelve hours Afterwards, a carbonization treatment was carried out under nitrogen. Carbonize for 1 hour (carbonization temperature is 850 ℃, heating rate 2 ℃ / min), then soak in 1 M hydrochloric acid for 14 hours, then put it into a ball mill for full grinding for 12 hours, suction filter, wash with water, and put it into vacuum drying After oven drying for 10 hours, a non-metallic catalyst consisting of nitrogen and phosphorus porous carbon material is obtained.

[0042] Compared with commercial platinum-carbon catalysts, the half-potential shifted negatively by 20 mV when nitrogen-phosphorus co-doped porous carbon material non-metallic catalysts were added with 1% carbonization activator.

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Abstract

The invention provides a preparation method and application of nitrogen and phosphorus co-doped porous carbon materials which are used in the aspects of electric catalysis, catalyst carriers, super capacitors, water treatment and the like. The method comprises that a carbon source, a nitrogen source, a phosphorus source and a carbonization activating agent are mixed in different proportions, ground, then subjected to high temperature carbonization treatment in nitrogen gas, and then subjected to acid treatment to obtain the porous carbon materials with different nitrogen and phosphorus compositions. The prepared carbon materials are used as non-noble metal catalysts; compared with traditional noble metal catalysts, the materials have the advantages of simpler preparation process, high activity, strong anti-poisoning ability, and good stability, and are ideal oxygen reduction catalysts for fuel cells. The prepared carbon materials are used as catalyst carriers; compared with traditional carbon powder carriers, the catalysts loaded with nanoparticles have the catalytic activity, stability, anti-poisoning ability and the like improved significantly. The carbon materials have relatively idea effects when used in the fields of super capacitors and water treatment.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous carbon materials, and relates to porous carbon materials used as electrocatalysts, catalyst carriers, supercapacitors or water treatment, in particular to a preparation method and application of nitrogen and phosphorus co-doped porous carbon materials . Background technique [0002] Due to their large specific surface area, high porosity, high thermal stability, good electrical conductivity and thermal conductivity, porous carbon materials are widely used in fuel cells, supercapacitors, catalyst supports, water treatment, adsorbents and gas storage, etc. It has been widely used in the field and has become a hot spot in the research and development of materials science. At present, the synthesis methods of porous carbon materials mainly include soft / hard template method and catalytic activation method. Through different preparation processes, ordered or disordered porous carbon mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J21/18B01J32/00B01J35/10C01B31/02
CPCB01J21/18B01J27/24C01P2002/82C01P2002/72B01J35/60
Inventor 王伟李金梅康玉茂荆王莉雷自强
Owner LANZHOU JIAOTONG UNIV
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