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Preparation of V3S4@CNTS and application of electrocatalytic performance thereof

A technology of electrocatalyst and inert atmosphere, which is applied in the synthesis field of V3S4@CNTS electrocatalyst, can solve the problems of lowering the reaction energy barrier, achieve the effects of high purity and crystallinity, cheap raw materials, and high yield

Inactive Publication Date: 2019-04-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the electrocatalytic water oxidation process involves four-electron and four-proton transfer processes, the reaction energy barrier is also higher than the water reduction half-reaction, so a suitable catalyst is needed to lower its reaction energy barrier.

Method used

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  • Preparation of V3S4@CNTS and application of electrocatalytic performance thereof
  • Preparation of V3S4@CNTS and application of electrocatalytic performance thereof
  • Preparation of V3S4@CNTS and application of electrocatalytic performance thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Weigh 4mmol of oxalic acid and 2mmol of V 2 O 5 and 50mg of carbon nanotubes were dissolved in 30mL of deionized water, and the mixed solution was obtained after magnetic stirring for 30min;

[0023] Step 2: Pour the prepared solution into the reaction polytetrafluoroethylene lining, the filling ratio of the reaction kettle is 80%, and put the inner lining into the outer kettle, put it in an oven after fixing, and the reaction conditions Incubate at 180°C for 24h.

[0024] Step 3: After the hydrothermal reaction is completed, the hydrothermal kettle is naturally cooled to room temperature, and the reaction solution is poured out and washed 5 times with deionized water and absolute ethanol. After suction filtration, the samples were collected and dried under vacuum at 60 °C for 24 h to obtain the vanadium oxide composite material.

[0025] Step 4: control the molar ratio of vanadium oxide composite material and thioacetamide to be 1:12, spread the two raw mate...

Embodiment 2

[0030] Step 1: Weigh 4mmol of oxalic acid and 2mmol of V 2 O 5 and 50mg of carbon nanotubes were dissolved in 30mL of deionized water, and the mixed solution was obtained after magnetic stirring for 30min;

[0031] Step 2: Pour the prepared solution into the reaction polytetrafluoroethylene lining, the filling ratio of the reaction kettle is 80%, and put the inner lining into the outer kettle, put it in an oven after fixing, and the reaction conditions Incubate for 24h at 200°C.

[0032] Step 3: After the hydrothermal reaction is completed, the hydrothermal kettle is naturally cooled to room temperature, and the reaction solution is poured out and washed three times with deionized water and absolute ethanol each. After suction filtration, the samples were collected and dried under vacuum at 80 °C for 12 h to obtain the vanadium oxide composite material.

[0033] Step 4: Control the molar ratio of the vanadium oxide composite material to the sublimated sulfur to be 1:15, spr...

Embodiment 3

[0037] Step 1: Weigh 4mmol of oxalic acid and 2mmol of V 2 O 5 and 70 mg of carbon nanotubes were dissolved in 30 mL of a mixed solution of ethylene glycol and deionized water (1:1), and the mixed solution was obtained after magnetic stirring for 30 min.

[0038] Step 2: Pour the prepared solution into the reaction polytetrafluoroethylene lining, the filling ratio of the reaction kettle is 80%, and put the inner lining into the outer kettle, put it in an oven after fixing, and the reaction conditions Incubate for 24h at 160°C.

[0039]Step 3: After the hydrothermal reaction is completed, the hydrothermal kettle is naturally cooled to room temperature, and the reaction solution is poured out and washed three times with deionized water and absolute ethanol each. After suction filtration, the samples were collected and dried under vacuum at 60 °C for 24 h to obtain the vanadium oxide composite material.

[0040] Step 4: control the molar ratio of vanadium oxide composite mater...

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Abstract

The invention discloses synthesis of a V3S4@CNTS electrocatalyst and application of the V3S4@CNTS electrocatalyst as an electrocatalytic cracking aquatic hydrogen catalyst. As a layered material, vanadium disulfide attracts more and more attention in recent years. However, few reports of V3S4 are provided. According to the invention, a hydrothermal-calcination two step method is used. The methodcomprises the following steps of: carrying out hydrothermal reaction on a mixed solution of a vanadium source and a carbon nano tube to obtain a composite material of vanadium oxide and carbon nano tube, mixing the vanadium oxide and sulfur in a tubular furnace, calcining, washing and drying to obtain a final product, the V3S4@CNTS electrocatalyst has uniform material chemical composition and highelectrocatalytic activity and stability in a full-PH electrolyte.

Description

technical field [0001] The invention relates to the technical field of nano-powder preparation, in particular to a V 3 S 4 Synthesis of @CNTS electrocatalysts and their applications. Background technique [0002] The increasingly severe energy and environmental problems have prompted people to pay more and more attention to the development and utilization of clean energy and sustainable energy. Electrocatalytic water splitting to produce hydrogen and oxygen is considered to be one of the most efficient ways. However, since the electrocatalytic water oxidation process involves four-electron and four-proton transfer processes, the reaction energy barrier is also higher than that of the water reduction half-reaction, so a suitable catalyst is required to reduce its reaction energy barrier. CNTs have the characteristics of unique structure, suitable specific surface area, low resistance and high stability. [0003] The Chinese patent with the patent number of CN106654186A pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/04B01J35/33B01J35/00B01J35/30Y02E60/36
Inventor 曹丽云王琳琳冯亮亮黄剑锋冯李何丹阳
Owner SHAANXI UNIV OF SCI & TECH
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