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Metal oxide nano sheet supported carbon coated metal particle electrolysed water catalyst

A technology of metal particles and oxides, which is applied in the field of electrochemistry, can solve problems such as high overpotential, poor stability, and large power consumption, and achieve the effects of reducing the cost of hydrogen production, low cost, and simple preparation process

Active Publication Date: 2019-06-28
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest problem of non-precious metal electrocatalysts is the high overpotential of hydrogen evolution reaction and oxygen evolution reaction in the process of hydrogen production by electrolysis of water, which leads to high power consumption and poor stability.

Method used

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  • Metal oxide nano sheet supported carbon coated metal particle electrolysed water catalyst
  • Metal oxide nano sheet supported carbon coated metal particle electrolysed water catalyst
  • Metal oxide nano sheet supported carbon coated metal particle electrolysed water catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A carbon-coated metal particle electrolysis water catalyst supported by metal oxide nanosheets, prepared by the following method:

[0030] (1) Dissolve 500 mg of sodium molybdate in 30 ml of N,N-dimethylacetamide to prepare sodium molybdate N,N-dimethylacetamide solution, and dissolve 200 mg of nickel nitrate in 30 ml of N ,N-Dimethylacetamide is formulated into nickel nitrate N,N-dimethylacetamide solution, and then sodium molybdate N,N-dimethylacetamide solution and nickel nitrate N,N-dimethylacetamide Mix the solution, add 200 mg of carbon nanotubes, ultrasonically stir and disperse, first ultrasonically for 10 minutes, and then stir for 10 minutes to obtain a mixed suspension liquid. Put the mixed suspension liquid into a reactor with a capacity of 100 mL for solvothermal reaction. The solvothermal reaction temperature 120 degrees Celsius, heat preservation for 24 hours, after natural cooling, take out the product obtained after the solvothermal reaction, wash, filt...

Embodiment 2

[0033] A carbon-coated metal particle electrolysis water catalyst supported by metal oxide nanosheets, prepared by the following method:

[0034](1) 500 milligrams of sodium molybdate are dissolved in the ethylene glycol of 30 milliliters and are mixed with sodium molybdate ethylene glycol solution, and 200 milligrams of nickel nitrate are dissolved in 30 milliliters of ethylene glycol and are mixed with nickel nitrate ethylene glycol solution, and then Mix sodium molybdate ethylene glycol solution and nickel nitrate ethylene glycol solution, add 200 mg of carbon black, and ultrasonically stir to disperse, first ultrasonically for 10 minutes, then stir for 10 minutes to obtain a mixed suspension liquid, and put the mixed suspension liquid into a container with a capacity of 100 mL In the reaction kettle, carry out solvothermal reaction, the solvothermal reaction temperature is 150 degrees Celsius, keep warm for 14 hours, after natural cooling, take out the product obtained afte...

Embodiment 3

[0037] A carbon-coated metal particle electrolysis water catalyst supported by metal oxide nanosheets, prepared by the following method:

[0038] (1) Dissolve 500 mg of sodium tungstate in 30 ml of oleylamine to prepare sodium tungstate oleylamine solution, dissolve 200 mg of ferric nitrate in 30 ml of oleylamine to prepare iron nitrate oleylamine solution, and then dissolve sodium tungstate Mix the oleylamine solution and the oleylamine ferric nitrate solution, add 200 mg of graphene, and disperse with ultrasonic stirring, first ultrasonic for 10 minutes, then stir for 10 minutes to obtain a mixed suspension liquid, put the mixed suspension liquid into a reaction kettle with a capacity of 100mL, and carry out solvent Thermal reaction, solvothermal reaction temperature is 100 degrees Celsius, heat preservation for 48 hours, after natural cooling, take out the product obtained after solvothermal reaction, wash, filter, and vacuum dry for 24 hours to obtain the primary sample;

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Abstract

The invention discloses a metal oxide nano sheet supported carbon coated metal particle electrolysed water catalyst which is prepared from the following steps: (1) dissolving a metal precursor A in asolvent to prepare a solution A, dissolving a metal precursor B in a solvent to prepare a solution B, mixing the solution A with the solution B, adding a substrate material, ultrasonically stirring the mixture to obtain a mixed suspension liquid, adding the mixed suspension liquid into a reaction kettle for a solvothermal reaction, cooling the reactant after the reaction to room temperature, taking out a material in the reaction kettle, and filtering, cleaning and vacuum drying the material to obtain an initial sample; and (2) introducing mixed gas of hydrogen and inert gas, and carrying out high-temperature calcining to obtain a final product. The product prepared by the method has relatively good electrolysed water catalytic activity and electrochemical stability, and the overpotential of the electrolysed water in the whole electrolytic cell is smaller than or equal to 1.48 V, thereby laying a technical foundation for lowering hydrogen making cost.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a carbon-coated metal particle electrolysis water catalyst supported by metal oxide nanosheets. Background technique [0002] At present, fossil fuels are one of the main energy sources. The limited reserves of fossil fuels not only limit the development of human beings, but also cause serious pollution to the environment during use. Therefore, it is urgent to develop clean energy that can replace traditional fossil energy. Renewable Energy. Hydrogen is clean, efficient, and renewable, and is the best substitute for fossil fuels. Among many hydrogen production methods, hydrogen production by electrolysis of water has attracted widespread attention due to its simple and pollution-free process and the high purity of the obtained hydrogen. Although the hydrogen production technology of electrolyzed water has made some progress in decades of research, how to further reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J23/888B01J23/847C25B11/06C25B1/04
CPCY02E60/36
Inventor 尹诗斌钱光付陈伟冯寿权张浩罗林沈培康
Owner GUANGXI UNIV
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