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Nanometer carbon-based nitrogen-based non-previous metal composite electrocatalytic material, preparation method thereof employing high-temperature annealing and application

A technology of electrocatalytic materials and non-precious metals, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of harsh environmental requirements, cannot directly apply oxygen reduction electrocatalysis, etc., and achieve interface bonding Good, easy mass production, high current density effect

Inactive Publication Date: 2018-04-13
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among copper-containing oxidases, such as laccase and cytochrome C enzymes, all exhibit excellent oxygen reduction activity, and they have a common feature that copper is the active center for oxygen reduction, but the enzyme is extremely harsh on the environment. requirements and cannot be directly applied to the oxygen reduction electrocatalysis of fuel cells

Method used

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  • Nanometer carbon-based nitrogen-based non-previous metal composite electrocatalytic material, preparation method thereof employing high-temperature annealing and application
  • Nanometer carbon-based nitrogen-based non-previous metal composite electrocatalytic material, preparation method thereof employing high-temperature annealing and application
  • Nanometer carbon-based nitrogen-based non-previous metal composite electrocatalytic material, preparation method thereof employing high-temperature annealing and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of nitrogen-doped cuprous oxide / carbon nanotube composites (N-Cu 2 O / CNTs)

[0032] (1) Raw material pretreatment: Weigh a certain mass of carbon nanotubes and sodium copper chlorophyllin into a 50mL beaker, add a certain amount of a mixture of ethanol and ultrapure water with a volume ratio of 1:1, and place it in a 40KHz ultrasonic wave Ultrasonic in the cleaner, ultrasonic time 2h. Transfer the dispersed suspension to a clean evaporating dish, and quickly dry it in an oven at 150°C for use.

[0033] (2) Preparation of nitrogen-doped cuprous oxide / carbon nanotube composite material: transfer the above materials to a quartz boat; then, place the quartz boat in the quartz tube and place it in a tube furnace for argon protection Gas, except the inner air; set the temperature at 700°C, wait for the temperature to reach the set temperature, keep it for 50 minutes, cool down to room temperature (note: keep the inert gas argon in the whole process), turn off th...

Embodiment 2

[0041] Preparation of cobalt carbide / nitrogen-doped carbon nanotube composites (CoCx / N-CNTs)

[0042] (1) Pretreatment of raw materials Weigh carbon nanotubes and CoPy (cobalt pyridine) with a mass ratio of 1:1 in a 50mL beaker, add a certain amount of ethanol and ultrapure water with a volume ratio of 1:1 , placed in a 40KHz ultrasonic cleaner for ultrasonic dispersion, and the ultrasonic time is 2h. Transfer the dispersed suspension to a clean evaporating dish, and put it into a vacuum drying oven at 150°C for drying for 12 hours.

[0043] (2) Preparation of cobalt carbide / nitrogen-doped carbon nanotube composite material: transfer the dried material in step (1) to a quartz boat; then, place the quartz boat on the quartz tube, and place the quartz tube on the tubular Pass the argon protective gas in the furnace to remove the air inside; set the temperature to 700°C, wait for the temperature to reach the set temperature, keep it for 30 minutes, cool down to room temperature ...

Embodiment 3

[0049] Embodiment 3: prepare germanium oxide / graphene composite material (GeO 2 / Gra)

[0050] (1) Raw material pretreatment: Weigh graphene and carboxyethyl germanium sesquioxide with a mass ratio of 1:1 in a 50mL beaker with an analytical balance, and add a certain amount of ethanol and supernatant with a volume ratio of 1:1. After the mixed solution of pure water is placed in a 40KHz ultrasonic cleaner for ultrasonic dispersion, the ultrasonic time is 2h. Transfer the dispersed suspension to a clean evaporating dish, and quickly dry it in an oven at 150°C for use.

[0051] (2) Preparation of germanium oxide / graphene composite material: transfer the above materials to a quartz boat; Inner air; set the temperature at 1000°C, wait for the temperature to reach the set temperature, keep it for 50 minutes, cool down to room temperature (note: keep the inert gas argon in the whole process), turn off the argon, and collect the product for later use.

[0052] As a control experim...

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Abstract

The invention provides a high-temperature annealing method for preparing a nanometer carbon-based nitrogen-based non-previous metal composite electrocatalytic material and for electrocatalyst research. The method comprises the steps of adding a carbon nanotube and a substance containing nitrogen-doped non-previous metal copper into a solvent, performing ultrasonic dispersion to form a suspension liquid, placing the suspension liquid in a vacuum drying box for drying, placing the dried mixture in a tubular furnace for high-temperature heating to reach a certain temperature, maintaining a high temperature for certain time, and cooling to a room temperature, thereby obtaining the nanometer carbon-based non-previous metal composite material, wherein inert gas is introduced to protect during the whole high-temperature annealing process. The method is simple to operate and is low in cost, mass production is easy, the prepared composite material combines structural characteristic of the carbon nanotube and the characteristic of non-previous metal, has great advantage in the catalytic oxidization-reduction aspect, shows favorable catalytic activity, stability and methyl alcohol toxicity resistance and can be applied to an acid fuel cell, an alkali fuel cell and a methanol fuel cell, and the research has great significance.

Description

technical field [0001] The invention belongs to the research field of nanocomposite materials, in particular to a nanocarbon-based nitrogen-doped non-noble metal composite electrocatalytic material and its preparation method and application by high-temperature annealing. Background technique [0002] The combustion of traditional fossil fuels such as coal and oil has brought about environmental problems such as acid rain, greenhouse effect, and smog, and fossil fuels are non-renewable resources that are increasingly depleted. Therefore, it is increasingly important to seek and develop ideal clean and efficient new energy sources, which is also one of the major energy issues to be solved in the new century. The fuel cell is in line with the requirements of the above-mentioned new energy. At present, the most mature cathode and anode catalysts used in commercial fuel cells are noble metals and their alloys. However, noble metals are extremely expensive and scarce in storage, ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90B82Y30/00
CPCB82Y30/00H01M4/8825H01M4/9041H01M4/9083Y02E60/50
Inventor 聂华贵侯俊婕刘敏杨植葛梦展黄少铭
Owner WENZHOU UNIVERSITY
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