Preparation of V3S4@rGO and application of electro-catalytic property thereof

An electrocatalyst and oxide stone technology, applied in physical/chemical process catalysts, electrodes, electrolysis processes, etc., can solve problems such as economic cost constraints, and achieve the effects of simple process, uniform chemical composition, high purity and crystallinity

Inactive Publication Date: 2019-04-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the initial stage of research, pure metal electrode materials were the first to be studied, and it was found that noble metal platinum is an ideal catalytic material, but it is constrained by economic cost issues.

Method used

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  • Preparation of V3S4@rGO and application of electro-catalytic property thereof
  • Preparation of V3S4@rGO and application of electro-catalytic property thereof
  • Preparation of V3S4@rGO and application of electro-catalytic property thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Weigh 50 mg of graphene oxide and disperse it in 100 mL of deionized water, and sonicate for 5 hours to obtain a 0.5 mg / mL graphene oxide dispersion.

[0023] Step 2: Mix 4mmol of oxalic acid, 2mmol of V 2 o 5 Dissolve in 35 mL of deionized water, add 5 mL of the above graphene oxide dispersion, and stir magnetically for 1 h to obtain a mixed solution.

[0024] Step 3: Pour the prepared solution into the reaction polytetrafluoroethylene lining. The filling ratio of the reaction kettle is 80%, and put the lining into the outer kettle. After fixing it, place it in the oven. The reaction conditions Insulate at 180°C for 24h.

[0025] Step 4: After the hydrothermal reaction is completed, the hydrothermal kettle is naturally cooled to room temperature, and the reaction liquid is poured out and washed 3 times with deionized water and absolute ethanol respectively. After suction filtration, the samples were collected and dried under vacuum at 60° C. for 24 hours to ...

Embodiment 2

[0031] Step 1: Weigh 50 mg of graphene oxide and disperse it in 100 mL of deionized water, and sonicate for 5 hours to obtain a 0.5 mg / mL graphene oxide dispersion.

[0032] Step 2: Mix 5mmol of oxalic acid, 2mmol of V 2 o 5 Dissolve in 30 mL of deionized water, add 10 mL of the above graphene oxide dispersion, and stir magnetically for 1 h to obtain a mixed solution.

[0033] Step 3: Pour the prepared solution into the reaction polytetrafluoroethylene lining. The filling ratio of the reaction kettle is 80%, and put the lining into the outer kettle. After fixing it, place it in the oven. The reaction conditions Insulate at 200°C for 20h.

[0034] Step 4: After the hydrothermal reaction is completed, the hydrothermal kettle is naturally cooled to room temperature, and the reaction liquid is poured out and washed 3 times with deionized water and absolute ethanol respectively. After suction filtration, the samples were collected and dried under vacuum at 80° C. for 12 hours to...

Embodiment 3

[0039] Step 1: Weigh 50 mg of graphene oxide and disperse it in 100 mL of deionized water, and sonicate for 5 hours to obtain a 0.5 mg / mL graphene oxide dispersion.

[0040]Step 2: Mix 5mmol of oxalic acid, 2mmol of V 2 o 5 Dissolve in 20 mL of ethylene glycol, add 20 mL of the above graphene oxide dispersion, and stir magnetically for 1 h to obtain a mixed solution.

[0041] Step 3: Pour the prepared solution into the reaction polytetrafluoroethylene lining. The filling ratio of the reaction kettle is 80%, and put the lining into the outer kettle. After fixing it, place it in the oven. The reaction conditions Insulate at 180°C for 24h.

[0042] Step 4: After the hydrothermal reaction is completed, the hydrothermal kettle is naturally cooled to room temperature, and the reaction liquid is poured out and washed 3 times with deionized water and absolute ethanol respectively. After suction filtration, the samples were collected and dried under vacuum at 40° C. for 24 hours to ...

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Abstract

The invention discloses synthesis of a V3S4@rGO catalyst and application thereof in the aspect of serving as a catalyst for producing hydrogen by electrocatalytic cracking of water. VS2 serves as a stratified material and attracts more and more attention of people in recent years. However, reports about V3S4 are extremely few. The V3S4@rGO catalyst is obtained through a hydrothermal-calcining two-step method; a mixed solution of a vanadium source and graphene oxide are subjected to a hydrothermal reaction to obtain a composite material of vanadium oxide and the graphene oxide; then, the compound of the vanadium oxide and sulphur are mixed and calcined in a tube furnace; and the final product, namely, the V3S4@rGO hydrogen producing electrocatalyst which has uniform chemical compositions ofmaterials and has high electrocatalytic activity and stability in a full PH electrolyte, is obtained by washing, drying and collecting.

Description

technical field [0001] The invention relates to the technical field of nano powder preparation, in particular to a V 3 S 4 Synthesis and application of @rGO electrocatalysts. Background technique [0002] The water splitting process can be divided into two parts, the oxygen evolution reaction and the oxygen evolution reaction, which dominate the photocatalytic hydrogen evolution reaction, electrocatalytic hydrogen evolution reaction, and photocatalytic hydrogen evolution reaction. The hydrogen evolution reaction requires external energy to be converted into electrical energy, and then converted into chemical energy by the hydrogen evolution reaction, and the external energy is mainly divided into two parts; one is photoelectric water splitting, which is the photocatalytic hydrogen evolution reaction; the other is direct ionization with electricity Splitting water is the electrocatalytic hydrogen evolution reaction. Hydrogen is considered to be a popular energy carrier tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C25B11/06C25B1/04
CPCB01J27/04B01J35/0033C25B1/04C25B11/04Y02E60/36
Inventor 曹丽云王琳琳冯亮亮黄剑锋徐瑞杜盈盈
Owner SHAANXI UNIV OF SCI & TECH
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