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Preparation and application of nitrogen doped graphene fuel cell catalyst

A nitrogen-doped graphene and catalyst technology, applied in physical/chemical process catalysts, battery electrodes, chemical instruments and methods, etc., can solve the problems of difficult industrialized production, harsh reaction conditions, complex synthesis processes, etc., and achieve low cost of raw materials. , The preparation process is simple and the yield is high.

Inactive Publication Date: 2014-02-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have high requirements for equipment, harsh reaction conditions, complex synthesis process, low yield, and are not easy for industrial production.

Method used

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  • Preparation and application of nitrogen doped graphene fuel cell catalyst
  • Preparation and application of nitrogen doped graphene fuel cell catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of nitrogen-doped graphene C-NG-900: Weigh 0.1600g of graphite oxide and disperse it in 80ml of ethanol, and ultrasonically treat it for 2 hours to obtain a graphene oxide solution. Weigh 0.0600g FeSO at the same time 4 ·7H 2 O, 0.3500g of cyanamide was dispersed in 80ml of ethanol, stirred at 60°C for 2h to obtain a mixed solution. Then, the graphene oxide solution was added dropwise into the above mixed solution, stirring was continued at 60° C. for 12 h, and the solvent was evaporated to obtain a nitrogen-doped graphene precursor. Then, put the precursor in the quartz boat, under N 2 Under the protection of the atmosphere, the temperature was raised to 900°C at a rate of 20°C / min, and kept for 2 hours. 2 After the temperature in the atmosphere is naturally lowered to room temperature, the required nitrogen-doped graphene catalyst is obtained.

Embodiment 2

[0032] Preparation of nitrogen-doped graphene D-NG-900: Weigh 0.1600g of graphite oxide and disperse it in 80ml of ethanol, and ultrasonically treat it for 2 hours to obtain a graphene oxide solution. Weigh 0.0600g FeSO at the same time 4 ·7H 2 O. Disperse 0.3500g of dicyandiamide in 80ml of ethanol and stir at 60°C for 2h to obtain a mixed solution. Then, the graphene oxide solution was added dropwise into the above mixed solution, and the stirring was continued at 60° C. for 12 h. The solvent was evaporated to dryness to obtain a nitrogen-doped graphene precursor. Then, the precursor was placed in a quartz boat, and under the protection of N2 atmosphere, the temperature was raised to 900 °C at a rate of 20 °C / min, and kept for 2 h. 2 After the temperature in the atmosphere is naturally lowered to room temperature, the required nitrogen-doped graphene catalyst is obtained.

Embodiment 3

[0034] Preparation of nitrogen-doped graphene M-NG-900: Weigh 0.1600g of graphite oxide and disperse it in 80ml of ethanol, and ultrasonically treat it for 2 hours to obtain a graphene oxide solution. Weigh 0.0600g FeSO at the same time 4 ·7H 2 O, 0.3500g of melamine was dispersed in 80ml of ethanol, stirred at 60°C for 2h to obtain a mixed solution. Then, the graphene oxide solution was added dropwise into the above mixed solution, and the stirring was continued at 60° C. for 12 h. The solvent was evaporated to dryness to obtain a nitrogen-doped graphene precursor. Then, put the precursor in the quartz boat, under N 2 Under the protection of the atmosphere, the temperature was raised to 900°C at a rate of 20°C / min, and kept for 2 hours. 2 After the temperature in the atmosphere is naturally lowered to room temperature, the required nitrogen-doped graphene catalyst is obtained.

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Abstract

The invention provides preparation and application of a nitrogen doped graphene fuel cell catalyst, wherein a preparation method of the nitrogen doped graphene fuel cell catalyst is characterized by comprising the following steps: dispersing graphene oxide into a solvent, and carrying out ultrasonic treatment, thereby obtaining a graphene solution; dispersing at least one of non-noble metal salt as well as hydrate thereof and nitrogenous small organic molecules into the solvent, thereby obtaining a mixed solution; dropping the graphene oxide solution into the mixed solution, drying the solvent by distillation, thereby obtaining a nitrogen doped graphene precursor, warming to 600-1000 DEG C under the protection by inert gases, keeping the temperature for 1-4 hours, and cooling naturally, thereby obtaining the doped graphene catalyst. The nitrogen doped graphene preparation process provided by the invention is simple; required raw materials are low in cost, high in yield, can achieve industrial production easily, have very high oxygen reduction catalytic activity, can be applied to the fields of fuel cells, metal-air cells as well as microorganism fuel cells and the like.

Description

technical field [0001] The invention belongs to the field of graphene catalytic materials, in particular to a nitrogen-doped graphene fuel cell catalyst and its preparation method and application. Background technique [0002] A fuel cell is a device that directly converts chemical energy in fuel into electrical energy. It has the advantages of high energy density, no pollution, and diversification. It can be applied to portable mobile power sources, especially in the field of electric vehicles. It has great development potential and application The prospect is highly valued by governments and research institutions all over the world. [0003] Currently, the catalysts used in fuel cells are platinum (Pt) or Pt-based alloy catalysts. However, Pt is expensive and resources are scarce, which makes the cost of fuel cells too high. Therefore, finding and developing non-precious metal oxygen reduction catalysts has become an inevitable choice to promote the commercialization of f...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M4/90H01M4/88
CPCY02E60/50
Inventor 乔锦丽周学俊石晶晶徐攀
Owner DONGHUA UNIV
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