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Nitrogen and phosphor-doped carbon-based nonmetallic oxygen reduction/separation double-effect catalyst and preparation method thereof

A co-doping, non-metallic technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of high cost, difficulty in large-scale promotion, poor stability, and low catalytic performance of secondary metal-air battery catalysts, and achieve high-efficiency oxygen Effects of precipitation reaction catalytic performance, mild synthesis conditions, and good double-effect electrocatalytic performance

Active Publication Date: 2017-11-14
BEIJING UNIV OF CHEM TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of the material is simple, easy to operate, and low in cost, which solves the problems of low catalytic performance, poor stability, and high cost of secondary metal-air battery catalysts that are difficult to promote on a large scale

Method used

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  • Nitrogen and phosphor-doped carbon-based nonmetallic oxygen reduction/separation double-effect catalyst and preparation method thereof
  • Nitrogen and phosphor-doped carbon-based nonmetallic oxygen reduction/separation double-effect catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Weigh 0.238g (0.907mmol) of triphenylphosphine, 0.180g (1.428mmol) of melamine, and 0.060g of graphene oxide into 20ml of tetrahydrofuran, ultrasonically mix, then transfer to a 50ml reactor, heat up to 110°C, and react 24 hours.

[0030] The resulting product was washed with deionized water and ethanol for several times, and dried in an oven at 60°C for 12 hours. Carbon-based materials containing nitrogen and phosphorus are obtained. The synthesized nitrogen- and phosphorus-containing carbon-based materials were moved into a high-temperature furnace for calcination, with a flow rate of 100mL min -1 Argon gas, the high temperature furnace is heated up to 350°C at a rate of 5-10°C / min, held for 2 hours, then heated to 900°C, and then cooled naturally after holding for 2 hours to form a nitrogen-phosphorus co-doped carbon-based double-effect catalyst.

Embodiment 2

[0032] Weigh 0.190g (0.546mmol) of hexachlorotrimeric phosphazene, 0.200g (1.587mmol) of melamine, and 0.060g of carbon nanotubes into 20ml of tetrahydrofuran, mix well by ultrasonic, then transfer to a 50ml reaction kettle, and heat up to 120°C , reacted for 24 hours.

[0033] The resulting product was washed with deionized water and ethanol for several times, and dried in an oven at 70°C for 12 hours. Carbon-based materials containing nitrogen and phosphorus are obtained. The synthesized carbon-based materials containing nitrogen and phosphorus are moved into a high-temperature furnace for calcination, with a flow rate of 100mL min -1 Argon gas, the high temperature furnace is heated up to 350°C at a rate of 5-10°C / min, held for 3 hours, then heated to 950°C, and then cooled naturally after holding for 2 hours to form a nitrogen-phosphorus co-doped carbon-based double-effect catalyst.

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Abstract

The invention relates to a nitrogen and phosphor-doped carbon-based nonmetallic oxygen reduction / separation double-effect catalyst and a preparation method thereof and belongs to the technical field of a catalyst. A simple method is adopted for synthesizing a covalent organic polymer rich in nitrogen and phosphor on a carbon carrier, uniformly and regularly distributing the nitrogen source and phosphor source on the carbon source surface and then further performing high-temperature calcining carbonizing process, thereby preparing a porous carbon material doped with nitrogen and phosphor. The material is low in cost and easily prepared, has efficient oxygen reduction / separation reaction catalytic activity and also has higher stability. The catalyst has wide application prospect in the fields of rechargeable metal-air battery, regenerative fuel cells, and the like.

Description

technical field [0001] The invention relates to a preparation method of a doped porous carbon-based non-metallic oxygen reduction / precipitation dual-effect catalytic material, in particular to a porous material containing carbon, nitrogen and phosphorus as a precursor reactant, and then undergoes one-step high-temperature calcination and pyrolysis The method obtains a bifunctional carbon-based electrocatalytic material with both oxygen reduction and oxygen evolution catalytic properties, which has broad application prospects in the fields of secondary metal-air batteries, renewable fuel cells, zinc-air flow batteries, etc., and belongs to the field of catalyst technology. Background technique [0002] A rechargeable metal-air battery is a type of chemical power source that uses oxygen in the air as the positive electrode active material, an active metal as the negative electrode active material, and a neutral salt solution or alkaline solution as the electrolyte. During disc...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/96H01M4/86
CPCH01M4/8803H01M4/96Y02E60/50
Inventor 程元徽向中华李东明郭佳宁
Owner BEIJING UNIV OF CHEM TECH
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