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Phosphorus-doped cobalt nitride nanowire electrocatalyst as well as preparation method and application thereof

A cobalt nitride sodium and phosphorus doping technology, which is applied in the field of electrocatalysis, can solve the problems of further improvement in catalytic activity and stability, and achieve the effects of improving catalytic activity and stability, good conductivity, and low cost

Inactive Publication Date: 2019-11-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic activity of such carbon-based non-precious metal catalysts in alkaline electrolytes is much lower than that of noble metal catalysts, and the catalytic activity and stability need to be further improved.

Method used

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  • Phosphorus-doped cobalt nitride nanowire electrocatalyst as well as preparation method and application thereof
  • Phosphorus-doped cobalt nitride nanowire electrocatalyst as well as preparation method and application thereof
  • Phosphorus-doped cobalt nitride nanowire electrocatalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: the synthesis of P-CoN / CC nanowire catalyst

[0030] 1) Sonicate the carbon cloth in nitric acid, acetone, absolute ethanol, and deionized water for 30 minutes to remove impurities on the surface of the carbon cloth substrate, then wash it with a large amount of deionized water, and finally dry it in vacuum at 60°C for later use. ;

[0031] 2) Weigh 356mg of cobalt chloride hexahydrate, add 450mg of urea into 40mL of distilled water, and ultrasonically disperse it for 30 minutes to obtain a solution with a concentration of 37.5mmol / L;

[0032] 3) Put the solution obtained in step 2) and the pretreated carbon cloth in step 1) together into a hydrothermal kettle for hydrothermal reaction at 100°C for 12 hours. After cooling to room temperature, take out the carbon cloth, and then use distilled water and ethanol respectively Each was washed 3 times, and then placed in a vacuum drying oven at 60°C for vacuum drying to obtain a cobalt hydroxide precursor catal...

Embodiment 2

[0038] Embodiment 2: Synthesis of CoN / CC nanowire catalyst

[0039] 1) Sonicate the carbon cloth in nitric acid, acetone, absolute ethanol, and deionized water for 30 minutes to remove impurities on the surface of the carbon cloth substrate. Then wash it with a large amount of deionized water, and finally, dry it under vacuum at 60°C, and set it aside;

[0040] 2) Weigh 476mg of cobalt chloride hexahydrate, add 600mg of urea into 80mL of distilled water, and ultrasonically disperse it for 30 minutes to obtain a solution with a concentration of 25mmol / L;

[0041] 3) Put the solution obtained in step 2) together with the pretreated carbon cloth into a hydrothermal kettle for hydrothermal reaction at 120°C for 8 hours, take out the carbon cloth after cooling to room temperature, and wash with distilled water and ethanol for 3 Then, place it in a vacuum drying oven and dry it under vacuum at 60°C to obtain the cobalt hydroxide precursor catalyst Co(OH) grown in situ on the carbon...

Embodiment 3

[0045] Example 3: Co(OH) 2 Synthesis of / CC nanowire catalysts

[0046] 1) Sonicate the carbon cloth in nitric acid, acetone, absolute ethanol, and deionized water for 30 minutes to remove impurities on the surface of the carbon cloth substrate. Then wash it with a large amount of deionized water, and finally, dry it under vacuum at 60°C for later use.

[0047] 2) Weigh 238mg of cobalt chloride and 300mg of urea into 40mL of distilled water, and ultrasonically disperse them evenly for 30 minutes to obtain a solution with a concentration of 25mmol / L;

[0048] 3) Put the solution obtained in step 2) together with the pretreated carbon cloth into a hydrothermal kettle for a hydrothermal reaction at 140°C for 10 hours. After cooling to room temperature, take out the carbon cloth, and then wash with distilled water and ethanol for 3 Once again, place it in a vacuum drying oven at 60°C and dry it under vacuum to obtain the cobalt hydroxide catalyst Co(OH) grown on the carbon cloth...

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Abstract

The invention relates to a phosphorus-doped cobalt nitride nanowire electrocatalyst as well as a preparation method and application thereof, and belongs to the technical field of electrocatalysis. Thepreparation method comprises the following steps: a cobalt metal salt and urea are used as raw materials, water is used as a solvent, a carbon cloth is used as a substrate, and a cobalt hydroxide nanowire precursor array is grown in situ on the surface of the carbon cloth substrate by a hydrothermal process; and the precursor array is placed in an ammonia gas atmosphere, high-temperature calcination is performed, the calcination product is placed in a tube furnace with a phosphorus source, calcination is performed for doping phosphorus, and finally the phosphorus-doped cobalt nitride nanowirecatalyst is obtained. According to the method provided by the invention, the catalyst obtained by the method has a material with nanowire morphology grown in situ, the nanowire structure has a largersurface area, the carbon cloth as a substrate has good electrical conductivity, so that the catalyst has superior performance in an electrocatalytic oxygen evolution reaction and an electrocatalytichydrogen evolution reaction; and at the same time, the process is simple to operate, and the catalyst is a non-precious metal, has low preparation costs and high stability, and has good application prospects in the oxygen evolution reaction and the hydrogen evolution reaction.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a phosphorus-doped cobalt nitride nanowire electrocatalyst and a preparation method and application thereof. Background technique [0002] With the consumption of fossil energy, the fossil energy is about to be exhausted. Therefore, finding and developing clean new energy is an urgent problem in today's research. As a high calorific value and clean energy, hydrogen has great potential as the main energy source in the future. The potential application of hydrogen energy is mainly reflected in power vehicles. The performance of hydrogen-powered vehicles is comparable to that of petroleum-driven vehicles, and hydrogen-powered vehicles can effectively control pollution and greenhouse effects. This feature attracts more and more people. more attention. There are two important half-reactions in electrocatalytic water splitting, which are oxygen evolution reaction...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C25B11/06C25B1/04
CPCB01J27/24C25B11/04C25B1/04B01J35/33B01J35/61Y02E60/36
Inventor 钟兴李随勤王建国
Owner ZHEJIANG UNIV OF TECH
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