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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  • Abstract
  • 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 catalyti...

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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