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Preparation method of V2O3@Ni bifunctional composite electrocatalyst

An electrocatalyst and bifunctional technology, which is applied in the field of preparation of V2O3@Ni bifunctional composite electrocatalyst, can solve the problems of low efficiency, high energy consumption, easy mixing of impurities, etc., and achieves simple preparation process, improved specific surface area, and production cost. low effect

Inactive Publication Date: 2019-12-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solid-phase method in the prior art has the disadvantages of high energy consumption, low efficiency, and easy mixing of impurities.

Method used

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  • Preparation method of V2O3@Ni bifunctional composite electrocatalyst
  • Preparation method of V2O3@Ni bifunctional composite electrocatalyst
  • Preparation method of V2O3@Ni bifunctional composite electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: The raw materials of urea, vanadium triisopropoxide oxide and nickel nitrate hexahydrate are mixed according to the mass ratio of 6:1:4 to form a mixture;

[0023] Step 2: Take 10mg of the mixture in step 1, grind it, pass through a 60-mesh sieve, pour it into the inner lining of the reaction kettle, add 50mL of ultra-pure water, put it on the mixer and stir for 20min, then install the inner lining in the outer kettle and place it in the In a homogeneous reactor;

[0024] Step 3: Heating to 180°C for hydrothermal reaction for 48 hours, and cooling to room temperature naturally after the reaction;

[0025] Step 4: Take out the product naturally cooled to room temperature, and collect the product after three times of alternate washing with water and three times of alcohol;

[0026] Step 5: Put the collected product into an oven, dry at 60°C for 8 hours, dry and grind to obtain the target product V 2 o 3 @Ni.

Embodiment 2

[0028] Step 1: The raw materials of urea, vanadium triisopropoxide oxide and nickel nitrate hexahydrate are mixed according to the mass ratio of 7:2:5 to form a mixture;

[0029] Step 2: Take 13mg of the mixture in step 1, grind it, pass it through a 60-mesh sieve, pour it into the lining of the reaction kettle, add 53ml of ultra-pure water and stir evenly, put it on the mixer and stir for 25min, then install the lining in the outer kettle and fix it. In a homogeneous reactor;

[0030] Step 3: heating to 200°C for hydrothermal reaction for 36 hours, and cooling to room temperature naturally after the reaction;

[0031] Step 4: Take out the product naturally cooled to room temperature, and collect the product after three times of alternate washing with water and three times of alcohol;

[0032] Step 5: Put the collected product into an oven, dry at 70°C for 7 hours, and grind to obtain the target product V 2 o 3 @Ni.

Embodiment 3

[0034] Step 1: The raw materials of urea, vanadium triisopropoxide oxide and nickel nitrate hexahydrate are mixed according to the mass ratio of 8:3:6 to form a mixture;

[0035] Step 2: Take 15mg of the mixture in step 1, grind it, pass it through a 60-mesh sieve, pour it into the inner lining of the reaction kettle, add 58mL of ultrapure water, put it on the mixer and stir for 28min, then install the inner lining in the outer kettle and fix it in the In a homogeneous reactor;

[0036] Step 3: heating to 190°C for hydrothermal reaction for 42 hours, and cooling to room temperature naturally after the reaction;

[0037] Step 4: Take out the product naturally cooled to room temperature, and collect the product after three times of alternate washing with water and three times of alcohol;

[0038] Step 5: Put the collected product into an oven, dry at 60°C for 6 hours, and grind to obtain the target product V 2 o 3 @Ni.

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Abstract

The invention relates to a preparation method of a V2O3@Ni bifunctional composite electrocatalyst. The preparation method comprises the following steps: proportioning chemical components including urea, vanadium triisopropoxide oxide and nickel nitrate hexahydrate according to a certain mass ratio, carrying out grinding, and then performing sieving to obtain a mixture; adding 50-60 ml of ultrapurewater into the mixture, carrying out uniform mixing under stirring, carrying out heating to 180-220 DEG C, performing a hydrothermal reaction, and carrying out natural cooling to room temperature after the reaction is finished; and after repeated alternate cleaning with water and alcohol, collecting a product, drying the product, and grinding a dried substance to obtain the target product V2O3@Ni. According to the invention, the V2O3@Ni is prepared by adopting an efficient, simple and low-cost hydrothermal method, and the prepared V2O3@Ni has the advantages of uniform particle size, special structure, existence of gaps among layers, larger specific surface area and effectively improved conductivity, so the performances of hydrogen evolution and oxygen production through electrolysis of water are improved. The preparation method is simple in process, easily controllable in conditions, low in production cost, and easy for industrial production.

Description

technical field [0001] The invention belongs to the technical field of electrolytic water catalysts, in particular to a V 2 o 3 Preparation method of @Ni bifunctional composite electrocatalyst. Background technique [0002] With the advancement of the times and technology, our exploration and development of new energy should also keep pace with the times. New energy includes geothermal energy, nuclear energy, solar energy, biomass energy, wind energy, hydrogen energy, etc., among which electrolysis of water produces hydrogen and oxygen is a hot topic of current research. [0003] Due to its simple process and equipment, electrocatalytic water splitting technology is the most potential technology for developing sustainable and clean energy, and it is also an important research direction in the field of scientific research. Platinum noble metals such as Pt and Pd are currently the best catalysts for electrolysis of water and hydrogen evolution. However, due to their high pr...

Claims

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Application Information

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IPC IPC(8): B01J23/847B01J35/10C25B1/04C25B11/06
CPCB01J23/8472C25B1/04C25B11/04B01J35/33B01J35/61Y02E60/36
Inventor 黄剑锋李帅楠冯亮亮曹丽云冯永强张晓肖婷牛梦凡
Owner SHAANXI UNIV OF SCI & TECH
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