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Preparation method of selenium doped vanadium selenide composite material

A composite material, vanadium selenide technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems that limit the wide application of catalysts, high price, low reserves, etc., achieve excellent electrocatalytic performance, low production cost, and hydrogen production high efficiency effect

Active Publication Date: 2019-02-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, noble metal platinum series materials are still the catalysts with the highest electrocatalytic efficiency in electrocatalytic hydrogen production. However, their disadvantages of high price and low reserves greatly limit the wide application of this kind of catalysts. See document [1]

Method used

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  • Preparation method of selenium doped vanadium selenide composite material
  • Preparation method of selenium doped vanadium selenide composite material
  • Preparation method of selenium doped vanadium selenide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Weigh ammonium metavanadate and urea with a molar ratio of 1:3, that is, the masses are 116.98 mg and 180.18 mg respectively, and dissolve them in deionized water with a volume of 30 mL, and magnetically stir for 20 min to obtain a uniform mixed solution;

[0034] 2) Transfer the resulting mixed solution in step 1) to a 50mL autoclave with a polyparaphenylene liner, and control the filling ratio of the solution in the reactor to 60%, seal the reactor and place it in an oven React at 80°C for 16h;

[0035] 3) After the reaction is finished, wash with deionized water and absolute ethanol for 4 times, then vacuum-dry at 60°C for 4 hours, and grind to obtain the precursor of the VOOH compound;

[0036] 4) Weigh the VOOH precursor and selenium powder according to the element molar ratio V(mol):Se(mol)=2.7:7.2, put the VOOH precursor into a small porcelain boat, put the selenium powder into a large porcelain boat, and put Put the small porcelain boat into the big porcelai...

Embodiment 2

[0044] 1) Weigh vanadium chloride and hexamethylformamide at a molar ratio of 1:2, i.e. the masses are 157.30 mg and 280.36 mg respectively, dissolve them in deionized water with a volume of 30 mL, stir magnetically for 20 min, and obtain a uniform mixture liquid;

[0045] 2) Transfer the resulting mixed solution in step 1) to a 50mL autoclave with a polyparaphenylene liner, and control the filling ratio of the solution in the reactor to 40%, seal the reactor and place it in an oven React at 90°C for 15h;

[0046] 3) After the reaction is finished, wash with deionized water and absolute ethanol for 4 times, then vacuum-dry at 60°C for 5 hours, and grind to obtain the precursor of the VOOH compound;

[0047] 4) Weigh the VOOH precursor and selenium dioxide according to the element molar ratio V(mol):Se(mol)=4.9:15.8, put the VOOH precursor into a small porcelain boat, put the selenium dioxide into a large porcelain boat, Then put the small porcelain boat into the big porcelai...

Embodiment 3

[0052] 1) Weigh vanadium pentoxide and dimethylformamide at a molar ratio of 1:1, i.e. the masses are 182.00 mg and 73.10 mg respectively, dissolve them in deionized water with a volume of 30 mL, stir magnetically for 20 min, and obtain a uniform mixed solution;

[0053] 2) Transfer the resulting mixed solution in step 1) to a 50mL autoclave with a polyparaphenylene liner, and control the filling ratio of the solution in the autoclave to 50%, seal the autoclave, and place it in an oven React at 100°C for 14h;

[0054] 3) After the reaction is finished, wash with deionized water and absolute ethanol for 4 times, then vacuum-dry at 60°C for 6 hours, and grind to obtain the precursor of the VOOH compound;

[0055] 4) Weigh the VOOH precursor and sodium selenate according to the element molar ratio V(mol):Se(mol)=3.8:11.5, put the VOOH precursor into a small porcelain boat, put the sodium selenate into a large porcelain boat, Then put the small porcelain boat into the big porcel...

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Abstract

The invention discloses a preparation method of selenium doped vanadium selenide composite material. The preparation method comprises the following steps: weighing a vanadium source and an alkali source, dissolving the weighed vanadium source and alkali source in water uniformly to obtain a mixed solution, filling the mixed solution in a high pressure reactor with poly-para-position polyphenyl lining, placing the high pressure reactor in a drying oven and reacting for 12-18 hours at 80-120 DEG C, washing, carrying out vacuum drying and grinding to obtain a precursor of VOOH compound, placing the precursor in a low-temperature tubular furnace for sintering reaction, and after the sintering reaction, grinding into powder to obtain the selenium doped vanadium selenide composite material. According to the preparation method, the technology is simple, the condition is easy to control, the preparation period is short, the production cost is low, and the prepared composite material has a lamellar structure, higher electron transferring rate, and high catalytic activity, stability and hydrogen generation efficiency.

Description

technical field [0001] The invention belongs to the field of preparation of electrocatalytic energy materials, and relates to composite materials used in the fields of hydrogen production by electrolysis of water and electrocatalysis, in particular to a method for preparing a selenium-doped vanadium selenide composite material used in the fields of hydrogen production by electrolysis of water and electrocatalysis . Background technique [0002] With the ever-increasing demand for energy, the excessive consumption of traditional fossil energy and the increasingly serious environmental pollution, seeking sustainable and clean energy is expected to become a breakthrough to solve these two problems. As a green, sustainable and clean energy, hydrogen will be one of the ideal energy sources for human beings in the future, and the electrocatalytic hydrogen production technology using water as raw material will be an important green way to provide hydrogen energy. The core of elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/091Y02E60/36
Inventor 曹丽云何丹阳冯亮亮黄剑锋吴建鹏
Owner SHAANXI UNIV OF SCI & TECH
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