Nitrogen and phosphorus co-doped porous carbon catalyst and preparation method thereof

A technology of co-doping and porous carbon, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve great application potential, simple preparation method, and good electrocatalytic performance for oxygen reduction

Inactive Publication Date: 2016-04-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, phosphorus-nitrogen co-doped carbon materials are still in their infancy as oxygen reduction catalysts under acidic conditions. The...

Method used

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  • Nitrogen and phosphorus co-doped porous carbon catalyst and preparation method thereof
  • Nitrogen and phosphorus co-doped porous carbon catalyst and preparation method thereof
  • Nitrogen and phosphorus co-doped porous carbon catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 2g of aniline monomer, 0.34g of tetra-n-butylphosphine bromide, 0.4g of iron phthalocyanine, and 5g of silicon dioxide nanospheres into 10mL of 2mol / L hydrochloric acid solvent, mix well by ultrasonication for 40min, and stir Add 10mL, 1mol / L ammonium persulfate aqueous solution at low temperature, and use an ice-water bath to keep the temperature at 0°C, stir and polymerize for 24h, then transfer to a round-bottomed sesame cake, and place in an oil bath at 100°C for 12h.

[0028] (2) Dry the reactant in a water bath at 80°C to obtain a solid product. Under a nitrogen atmosphere, the solid product is calcined at a high temperature. Specifically, the temperature is raised to 800°C at a rate of 10°C / min, and kept at this temperature for 30 minutes. , naturally cooled to room temperature and taken out to obtain a mixture of nitrogen and phosphorus co-doped porous carbon material and silicon dioxide.

[0029] (3) Grind the taken out solid into powder and weigh it, a...

Embodiment 2

[0031] (1) Add 2g of aniline monomer, 0.1g of iron phosphate, and 4g of silica nanospheres into 10mL of 0.5mol / L sulfuric acid solvent, mix well by ultrasonication for 30min, and add 20ml of 0.925mol / L hydrogen peroxide under stirring solution, and use an ice-water bath to maintain the temperature at 0 ° C for 24 h, then transfer to a round-bottomed pancake, and use an oil bath at 120 ° C for 15 h.

[0032] (2) Dry the reactant in a water bath at 80°C to obtain a solid product. Under a nitrogen atmosphere, the solid product is calcined at a high temperature, specifically, the temperature is raised to 700°C at a rate of 5°C / min, and kept at this temperature for 1h , naturally cooled to room temperature and taken out to obtain a mixture of nitrogen and phosphorus co-doped porous carbon material and silicon dioxide.

[0033] (3) Grind the taken out solid into powder and weigh it, and weigh 1 g of the solid and add it to 40 mL of 4 mol / L ammonium bifluoride aqueous solution to etc...

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Abstract

The invention provides a preparation method and an application of a nitrogen and phosphorus co-doped porous carbon catalyst and belongs to the field of oxygen reduction catalysts for a fuel cell cathode. Nitrogen and phosphorus are introduced with an in-situ doping method, and the nitrogen and phosphorus doping amount is changed by adjusting the content of a nitrogen and phosphorus precursor. Besides, nitrogen and phosphorus co-doped porous carbon is prepared with a hard template method, and controllability of pore diameters of the porous carbon is realized by adjusting a hard template. The method comprises steps as follows: an earlier polymer of aniline monomers, a phosphorus precursor, a silica-based hard template and non-precious metal salt is prepared; the earlier polymer is calcined, and solids are obtained; the solids are etched, cleaned and dried, and the carbon material is obtained. More importantly, the prepared nitrogen and phosphorus co-doped porous carbon material has an excellent oxygen reduction electro-catalytic property under the acid condition and has huge application potential.

Description

technical field [0001] The invention belongs to the field of fuel cell cathode oxygen reduction catalysts, in particular to a phosphorus-nitrogen co-doped porous carbon catalyst and a preparation method thereof. Background technique [0002] Fuel cell is a power generation device that directly converts the chemical energy of fuel into electric energy in an efficient and environmentally friendly manner. , thermal power, and nuclear energy are the fourth generation of power generation technology. The oxygen reduction reaction rate of the fuel cell cathode is slow. In practical applications, Pt nanoparticles loaded on carbon materials with high catalytic activity must be used as catalysts to increase the oxygen reduction rate. However, the noble metal platinum-based catalysts used are expensive, scarce reserves in nature, low catalytic efficiency, and poor stability, which greatly limit the large-scale commercial application of fuel cells. Therefore, it is of great significan...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10H01M4/90
CPCH01M4/90Y02E60/50
Inventor 杨文张俏张小玲倪梅
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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