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Preparation method of vanadium disulfide/pentavanadium tetrasulfide composite electrocatalyst

A technology of vanadium disulfide and electrocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high cost, electrochemical application limitations, etc., and achieve environmental friendliness and simple synthesis route , the effect of low synthesis temperature

Inactive Publication Date: 2019-09-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their scarcity and high cost limit their electrochemical applications

Method used

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  • Preparation method of vanadium disulfide/pentavanadium tetrasulfide composite electrocatalyst
  • Preparation method of vanadium disulfide/pentavanadium tetrasulfide composite electrocatalyst
  • Preparation method of vanadium disulfide/pentavanadium tetrasulfide composite electrocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1) Sonicate the carbon cloth by immersing it in pure acetone solution for 5 minutes, then immerse the carbon cloth in 34mol / L hydrochloric acid for 5 minutes, and finally wash it alternately with ethanol and deionized water for 3 times, then dry it in vacuum at 40°C for 10 hours to get the treatment After the carbon cloth;

[0030] 2) Press NH 4 VO 3 :C 2 h 5 NS is a molar ratio of 1:10 to NH 4 VO 3 and C 2 h 5 Add NS to 20ml of deionized water at the same time, and add 4mL of ammonia water to adjust the pH of the solution. Stir magnetically at room temperature for 25min to obtain a clear solution A with a vanadium source concentration of 0.05mol / L;

[0031] 3) Pour the carbon cloth and solution A treated in step 1) into the reaction liner to seal, install the reaction liner in the outer kettle and fix it, then place it in a reaction oven for hydrothermal reaction at 160°C for 26 hours;

[0032] 4) After the hydrothermal reaction, the reaction kettle was natural...

Embodiment 2

[0034] 1) Sonicate the carbon cloth by immersing it in pure acetone solution for 10 minutes, then immerse the carbon cloth in 2mol / L hydrochloric acid for 10 minutes, and finally wash it alternately with ethanol and deionized water for 4 times, then dry it in vacuum at 50°C for 8 hours. After the carbon cloth;

[0035] 2) Press NH 4 VO 3 :C 2 h 5 NS is a molar ratio of 1:16 to NH 4 VO 3 and C 2 h 5 Add NS to 25ml of deionized water at the same time, and add 5mL of ammonia water to adjust the pH of the solution. Stir magnetically at room temperature for 30min to obtain a clear solution A with a vanadium source concentration of 0.08mol / L;

[0036] 3) Pour the carbon cloth and solution A treated in step 1) into the reaction liner to seal, install the reaction liner in the outer kettle and fix it, then place it in a reaction oven for hydrothermal reaction at 180°C for 20 hours;

[0037] 4) After the hydrothermal reaction, the reactor was naturally cooled to room temperatur...

Embodiment 3

[0039] 1) Sonicate the carbon cloth by immersing it in pure acetone solution for 10 minutes, then immerse the carbon cloth in 4mol / L hydrochloric acid for 10 minutes, and finally wash it alternately with ethanol and deionized water for 3 times, then dry it in vacuum at 60°C for 6 hours. After the carbon cloth;

[0040] 2) Press NH 4 VO 3 :C 2 h 5 NS is a molar ratio of 3:14 to NH 4 VO 3 and C 2 h 5 Add NS to 30ml of deionized water at the same time, and add 5mL of ammonia water to adjust the pH of the solution. Stir magnetically at room temperature for 30min to obtain a clear solution A with a vanadium source concentration of 0.1mol / L;

[0041] 3) Pour the carbon cloth and solution A treated in step 1) into the reaction lining to seal, install the reaction lining in the outer kettle and fix it, then place it in a reaction oven for hydrothermal reaction at 180°C for 24 hours;

[0042]4) After the hydrothermal reaction, the reactor was naturally cooled to room temperatur...

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Abstract

A preparation method of a vanadium disulfide / pentavanadium tetrasulfide composite electrocatalyst comprises the following steps: a carbon cloth is immersed and ultrasonically washed in pure acetone and hydrochloric acid in sequence, then is washed, and undergoes vacuum drying to obtain a treated carbon cloth; NH4VO3 and C2H5NS are simultaneously added to the deionized water, and ammonia water is added to adjust the pH value of the obtained solution in order to obtain a solution A; the carbon cloth and the solution A are poured into a reaction lining, the reaction lining is arranged and fixed in an outer kettle, the obtained kettle is placed in a reaction oven, and a hydrothermal reaction is carried out; and after the hydrothermal reaction is completed, the reaction vessel is naturally cooled to room temperature, and the carbon cloth is taken out, is respectively washed with deionized water and ethanol alternately, and undergoes vacuum drying to obtain the nanoflower-like vanadium disulfide / pentavanadium tetrasulfide compound growing on the carbon cloth. The prepared product has the advantages of uniform chemical composition, high purity and uniform morphology, has excellent electrochemical performances when used as a water electrolysis electrode material, and has an overpotential of about 414 mV at a current density of 100 mA / cm<2>.

Description

technical field [0001] The invention belongs to the technical field of electrolytic water catalysts, and in particular relates to a preparation method of a nano flower-like vanadium disulfide / pentavanadium tetrasulfide composite electrocatalyst. Background technique [0002] With the outbreak of the energy crisis and the emergence of environmental pollution, it is imperative to develop and develop clean energy. Hydrogen (H 2 ), as one of the clean and renewable energy sources, has become an ideal substitute for fossil fuels because of its high energy density and environmental friendliness. Electrocatalysis is an important way of clean energy conversion, which is of great significance to sustainable development. Hydrogen evolution reaction (HER) is being widely used as a high-efficiency and environmentally friendly technology [0003] Electrocatalytic water splitting technology is one of the most promising ways to produce hydrogen, and it is a technology with the most pote...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02C25B11/06C25B1/04
CPCB01J27/04C25B11/04C25B1/04B01J35/33B01J35/40Y02E60/36
Inventor 施潇虎曹丽云冯亮亮黄剑锋
Owner SHAANXI UNIV OF SCI & TECH
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