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Composite cobalt-vanadium nitride nanowire electrocatalyst as well as preparation method and application thereof

A composite cobalt vanadium and catalyst technology, applied in the field of electrocatalysis, can solve the problems of further improvement of catalytic activity and stability, and achieve the effects of improving catalytic activity and stability, easy regulation, and high specific surface area

Active Publication Date: 2018-09-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Composite cobalt-vanadium nitride nanowire electrocatalyst as well as preparation method and application thereof
  • Composite cobalt-vanadium nitride nanowire electrocatalyst as well as preparation method and application thereof
  • Composite cobalt-vanadium nitride nanowire electrocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: NC@Co 3 VN xSynthesis of / CF

[0033] 1) Sonicate the carbon cloth in acetone, absolute ethanol, deionized water, and nitric acid for 30 min 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;

[0034] 2) Weigh 356.9 mg of cobalt chloride, 78.7 mg of vanadium chloride, and 480 mg of urea into 40 mL of distilled water, and ultrasonically disperse them evenly for 30 minutes to obtain a precursor solution;

[0035] 3) Add the obtained precursor solution and the pretreated carbon cloth into a hydrothermal kettle for hydrothermal reaction at 120°C for 12 hours. After cooling to room temperature, take out the carbon cloth, wash with distilled water and ethanol three times respectively, and then Placed in a vacuum drying oven at 60 °C and dried under vacuum to obtain a carbon cloth-supported cobalt vanadium precursor catalyst Co 3 V / CF;...

Embodiment 2

[0043] Example 2: NC@CoN x Synthesis of / CF

[0044] 1) Sonicate the carbon cloth in acetone, absolute ethanol, deionized water, and nitric acid for 30 min 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;

[0045] 2) Weigh 475.9 mg of cobalt chloride and 480 mg of urea into 40 mL of distilled water, and ultrasonically disperse them evenly for 30 minutes to obtain a precursor solution;

[0046] 3) Add the obtained precursor solution and the pretreated carbon cloth into a hydrothermal kettle for hydrothermal reaction at 120°C for 12 hours. After cooling to room temperature, take out the carbon cloth, wash with distilled water and ethanol three times respectively, and then Place it in a vacuum drying oven and dry it under vacuum at 60°C to obtain a cobalt precursor catalyst supported by carbon cloth;

[0047] 4) The carbon cloth-supported cobalt pr...

Embodiment 3

[0052] Example 3: NC@VN x Synthesis of / CF

[0053] 1) Sonicate the carbon cloth in acetone, absolute ethanol, deionized water, and nitric acid for 30 min 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;

[0054] 2) Weigh 314.6 mg of vanadium chloride and 480 mg of urea into 40 mL of distilled water, and ultrasonically disperse them evenly for 30 minutes to obtain a precursor solution;

[0055] 3) Add the obtained precursor solution and the pretreated carbon cloth into a hydrothermal kettle for hydrothermal reaction at 120°C for 12 hours. After cooling to room temperature, take out the carbon cloth, wash with distilled water and ethanol three times respectively, and then Place it in a vacuum oven and dry it under vacuum at 60°C to obtain a carbon cloth-supported vanadium precursor catalyst;

[0056] 4) The carbon cloth-supported vanadium precurs...

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Abstract

The invention relates to a composite cobalt-vanadium nitride nanowire electrocatalyst as well as a preparation method and application thereof, and belongs to the field of electrocatalysis. The preparation method comprises the following steps of using cobalt and vanadium metal salt and urea as raw materials; using water as a solvent; using carbon cloth as a substrate; loading cobalt-vanadium nanowire precursor arrays on the surface of the carbon cloth substrates by a hydrothermal method; then, soaking the materials into a glucose solution at a certain concentration for a period of time; next, putting the materials into ammonia gas atmosphere; performing high-temperature calcination; finally putting the materials into a plasma reaction furnace for activation; finally obtaining the compositecobalt-vanadium nitride nanowire electrocatalyst. The material has a porous and carbon layer coating structure; large specific surface area and good conductivity are realized; the excellent performance is realized in the electrocatalytic whole water decomposition reaction; the current density in the electrocatalytic oxygen evolution reaction and the electrocatalytic hydrogen evolution reaction isrespectively superior to commercial IrO2 and Pt / C. Meanwhile, the process has the advantages that the operation is simple; the preparation cost of the catalyst is low; the stability is high; good industrial application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a composite cobalt vanadium nitride nanowire electrocatalyst and a preparation method and application thereof. Background technique [0002] The energy issue is a major issue facing society today. Fossil energy occupies a very large proportion in the current energy structure, but with the consumption of a large amount of fossil energy, it will lead to the depletion of fossil energy and the increasingly serious problem of environmental pollution. Therefore, finding and developing clean new energy is the current research Urgent question. New energy sources include solar energy, wind energy, water energy, hydrogen energy, nuclear energy and biomass energy. Among them, hydrogen, as a high calorific value and clean energy, has great potential as the main energy source in the future. In electrocatalytic water splitting, hydrogen evolution reaction (HER) and oxyg...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/24B01J35/33Y02E60/36
Inventor 钟兴李随勤王建国
Owner ZHEJIANG UNIV OF TECH
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