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Preparation method of carbon-coated metal particle anchored nanocatalytic material

A technology of nano-catalytic materials and metal particles, which is applied in the field of preparation of nano-catalytic materials, can solve the problems of long time consumption and high cost, and achieve improved stability and service life, uniform size distribution, good electrocatalytic activity and electrochemical stability Effect

Active Publication Date: 2020-02-25
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of the catalyst can be further improved by carbon coating technology, but the process methods for obtaining stable catalysts in the existing technologies are mostly complex, costly, and time-consuming. Therefore, there is an urgent need for a method that is simple and can prepare stable catalysts

Method used

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  • Preparation method of carbon-coated metal particle anchored nanocatalytic material
  • Preparation method of carbon-coated metal particle anchored nanocatalytic material
  • Preparation method of carbon-coated metal particle anchored nanocatalytic material

Examples

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Effect test

Embodiment 1

[0029] A method for preparing a carbon-coated metal particle-anchored nano-catalyst material, the specific operation steps are as follows:

[0030] (1) 4.756g (0.02mol) nickel chloride hexahydrate is dissolved in the deionized water of 80ml and carry out magnetic stirring, the gained nickel chloride solution after stirring is metal salt solution A, and 20ml ethylene glycol solution (B Diol and deionized water at a volume ratio of 1:4) were added to the metal salt solution A and mixed, and then slowly added dropwise 7.566g (0.2mol) reducing agent sodium borohydride for reduction reaction, continued stirring for 8 hours, and then carried out Suction filtration, cleaning with deionized water, after drying, the sample obtained is moved into a tube furnace and carried out high-temperature calcination, that is, after passing through a mixed gas (5% hydrogen and 95% argon) at a speed of 0.2ml / min for 30 minutes, then Then raise the temperature to 300 degrees Celsius at a rate of 5°C / ...

Embodiment 2

[0033] A method for preparing a carbon-coated metal particle-anchored nano-catalyst material, the specific operation steps are as follows:

[0034] (1) Dissolve 1.9g (0.008mol) nickel chloride hexahydrate, 1.904g (0.008mol) cobalt chloride hexahydrate and 1.08g (0.004mol) ferric chloride hexahydrate in 80ml of deionized water and then carry out magnetic stirring After stirring evenly, the obtained nickel chloride, cobalt chloride and ferric chloride solutions are the metal salt solution A, and 40ml of ethylene glycol solution (the volume ratio of ethylene glycol and deionized water is mixed at 1:2) is added to the metal salt Mix in solution A, then slowly add 7.566g (0.2mol) reducing agent sodium borohydride dropwise to carry out reduction reaction, continue to stir for 12 hours, then carry out suction filtration, wash with deionized water, and transfer the obtained sample into the tube type after drying The furnace is calcined at a high temperature, that is, a mixed gas (5% h...

Embodiment 3

[0037] A method for preparing a carbon-coated metal particle-anchored nano-catalyst material, the specific operation steps are as follows:

[0038] (1) Dissolve 5.14g (0.02mol) nickel acetylacetonate in 80ml of deionized water and then carry out magnetic stirring. Mix it with deionized water at a volume ratio of 1:4) Add metal salt solution A and mix, then slowly add 7.566g (0.2mol) reducing agent sodium borohydride dropwise for reduction reaction, continue stirring for 6 hours, and then carry out suction filtration , clean with deionized water, move the obtained sample into tube furnace after drying and carry out high-temperature calcination, promptly pass into mixed gas (5% hydrogen and 95% argon) after 30 minutes with the speed of 0.2ml / min, then again with The temperature was raised to 300 degrees Celsius at a rate of 5°C / min, and the temperature was naturally lowered after 6 hours of heat preservation. The obtained sample was etched in a potassium hydroxide solution (50g ...

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Abstract

The invention discloses a preparation method of a carbon-coated metal particle anchored nanocatalytic material. The preparation method comprises the following operation steps: (1) preparing a metal salt solution A, adding an organic carbon source B solution into the metal salt solution A, dropwise adding a reducing agent for a reaction, filtering, cleaning and drying the obtained reaction product,performing primary high-temperature calcination, adding a strong base to etch the obtained sample, drying the etched sample, performing high-temperature calcination in a mixed atmosphere, and cleaning and drying the calcined sample to obtain a primary sample C; and (2) preparing a metal salt solution D, adding the primary sample C obtained in step (1) into the metal salt solution D, performing areplacement reaction at normal temperature, filtering, cleaning and drying the obtained reaction product, and performing high-temperature calcination in a mixed atmosphere to obtain the nanocatalyticmaterial with the carbon-coated metal particle anchoring structure. Metal particles in the carbon-coated metal particle anchored nanocatalytic material prepared in the invention have uniform size distribution, the preparation method is simple, and the carbon-coated metal particle anchored nanocatalytic material can be used as an efficient electrocatalytic material, and has good electrocatalytic activity and electrochemical stability.

Description

technical field [0001] The invention relates to a preparation method of a nano catalytic material, in particular to a preparation method of a carbon-coated metal particle anchored nano catalytic material. Background technique [0002] With the rapid development of science and technology, the consumption of a large amount of non-renewable fossil energy has led to increasingly serious environmental pollution problems. Therefore, the development of technologies such as fuel cells and electrolysis of water to produce hydrogen are effective measures to solve energy shortages and environmental pollution in today's society. In these fields, catalysts play a vital role. However, the precious metal resources used in catalysts are scarce, and a series of problems such as high cost, low activity, and poor stability restrict the development of these technical fields. Nanotechnology has shown great development potential in the field of catalysis. The use of nanomaterial preparation tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C25B1/04C25B11/08C02F1/461H01M4/90
CPCB01J23/892B01J23/8993C25B1/04C25B11/04C02F1/461H01M4/8657H01M4/9041H01M4/9083B01J35/33Y02E60/36Y02E60/50
Inventor 尹诗斌于晨徐飞钱光付罗林
Owner GUANGXI UNIV