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Vanadium-doped cobalt-iron layered double hydroxide/foamed nickel nano composite material and preparation method thereof

A nanocomposite material and hydroxide technology, applied in the field of vanadium-doped cobalt-iron layered double hydroxide/foamed nickel nanocomposite material and its preparation, can solve the problem of unstable catalytic performance, limited large-scale application, earth To solve problems such as scarcity of resources, the experimental conditions are mild and controllable, the practicability is strong, and the raw materials are abundant.

Inactive Publication Date: 2019-08-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although like RuO 2 , IrO 2 Noble metals such as noble metals are the most effective catalyst materials so far, but due to the scarcity of earth resources, the price is expensive, which limits large-scale applications, and the catalytic performance is unstable. Metals replace precious metals in focus

Method used

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  • Vanadium-doped cobalt-iron layered double hydroxide/foamed nickel nano composite material and preparation method thereof
  • Vanadium-doped cobalt-iron layered double hydroxide/foamed nickel nano composite material and preparation method thereof
  • Vanadium-doped cobalt-iron layered double hydroxide/foamed nickel nano composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 0.2402g of ferric chloride hexahydrate, 0.2114g of cobalt trichloride hexahydrate and 0.0349g of vanadium trichloride and 0.2g of urea into the beaker, then add 40mL of deionized water, and then put the beaker Put it on a magnetic stirrer and stir evenly at a speed of 400 rpm for 15 minutes to ensure that the salts are fully dissolved. Then move the solution to a 50mL reactor, put 2 pieces of nickel foam that have been cut and pretreated vertically along the wall, then put the reactor into an oven, and react at a temperature of 120°C for 20h. After the reaction kettle is completely cooled, the nickel foam is taken out and washed three times with deionized water and ethanol respectively, and finally the nickel foam is dried in a vacuum oven at 60°C for 10 hours and taken out to obtain vanadium-doped cobalt-iron layered double hydroxide matter / nickel foam nanocomposites.

[0026] figure 1 The phase structure of the material can be obtained, and the two strong peak...

Embodiment 2

[0030] Weigh 0.1802g of ferric chloride hexahydrate, 0.2379g of cobalt trichloride hexahydrate and 0.0524g of vanadium trichloride and 0.2g of urea into the beaker, then add 40ml of deionized water, and then put the beaker Put it on a magnetic stirrer and stir evenly at a speed of 400 rpm for 15 minutes to ensure that the salts are fully dissolved. Then move the solution to a 50mL reactor, put 2 pieces of nickel foam that have been cut and pretreated vertically along the wall, then put the reactor into an oven, and react at a temperature of 120°C for 20h. After the reaction kettle is completely cooled, the nickel foam is taken out and washed three times with deionized water and ethanol respectively, and finally the nickel foam is dried in a vacuum oven at 60°C for 10 hours and taken out to obtain vanadium-doped cobalt-iron layered double hydroxide matter / nickel foam nanocomposites.

Embodiment 3

[0032] Weigh 0.1802g of ferric chloride hexahydrate, 0.1586g of cobalt trichloride hexahydrate and 0.1048g of vanadium trichloride and 0.2g of urea into the beaker, then add 40ml of deionized water, and then put the beaker Put it on a magnetic stirrer and stir evenly at a speed of 400 rpm for 15 minutes to ensure that the salts are fully dissolved. Then move the solution to a 50mL reactor, put 2 pieces of nickel foam that have been cut and pretreated vertically along the wall, then put the reactor into an oven, and react at a temperature of 120°C for 20h. After the reaction kettle is completely cooled, the nickel foam is taken out and washed three times with deionized water and ethanol respectively, and finally the nickel foam is dried in a vacuum oven at 60°C for 10 hours and taken out to obtain vanadium-doped cobalt-iron layered double hydroxide matter / nickel foam nanocomposites.

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Abstract

The invention belongs to the field of composite metal nano materials, and particularly relates to a vanadium-doped cobalt-iron layered double hydroxide / foamed nickel nano composite material and a preparation method thereof. According to the method, a hydrothermal synthesis method is adopted, vanadium-doped cobalt-iron layered double hydroxide grows on substrate foamed nickel at a lower temperature, and a vanadium-doped cobalt-iron layered double hydroxide / foamed nickel nanosheet array is directly obtained. The material has a sheet structure, and the structure can expose more active sites and has good stability; and moreover, foamed nickel has good conductivity, the electron migration rate is increased, and the material has good performance in electrolyzing aquatic oxygen. The vanadium-doped cobalt-iron layered double hydroxide / foamed nickel nano composite material has the advantages of simple and effective experimental conditions, high repeatability, environmental friendliness, low cost and easily available raw materials, and is expected to be applied to industrial production of high-efficiency electrocatalysts.

Description

technical field [0001] The invention belongs to the field of composite metal nanomaterials, in particular to a vanadium-doped cobalt-iron layered double hydroxide / foam nickel nanocomposite material and a preparation method thereof. Background technique [0002] As we all know, the increasing shortage of energy fossil fuels and the increasing environmental pollution make people urgently develop many sustainable energy conversion and storage technologies, and electrolysis of water is widely considered to be the most promising because of its mild reaction conditions and easy operation. A strategy to generate hydrogen as a clean fuel. In the application of electrolyzed water, oxygen evolution reaction is the key to the whole hydrolysis process due to its slow kinetics. At the same time, the high active steric hindrance also reduces the efficiency of energy conversion. Therefore, efficient catalyst materials have always been the direction of research. Although like RuO 2 , IrO ...

Claims

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Application Information

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IPC IPC(8): B01J23/847B01J35/02C25B1/04C25B11/06C25B11/03
CPCB01J23/8472C25B1/04C25B11/031C25B11/075B01J35/33B01J35/00B01J35/30Y02E60/36
Inventor 包健胡奕明王照龙李华明
Owner JIANGSU UNIV
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