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A kind of cobalt disulfide/sulfur nitrogen co-doped graphene catalytic material and its preparation and application

A technology of cobalt disulfide and catalytic materials, which is applied in the field of electrocatalytic materials, can solve the problems of low utilization rate of catalysts, obstacles to application, and difficult control, etc., and achieve industrial scale production, alleviate changes in metal materials, and maintain structure stable effect

Active Publication Date: 2020-06-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of using these two methods are: 1) the operating conditions are relatively harsh, the reaction temperature is high (usually >800 ° C), and the reaction time is long; 2) the degree of reduction is not high, and the C / O atomic ratio is only 10, which affects the The conductivity of heteroatom-doped graphene; 3) the degree of doping is not high, the amount of heteroatom doping is less than 10%, and it is not easy to control; 4) the preparation cost is high; 5) the prepared graphene sheets are easy to aggregate, due to High specific surface area, graphene is easy to aggregate due to strong van der Waals forces between planes
Oxygen reduction mainly occurs at the edge of the graphene sheet, and the practical utilization of the catalyst is low, which greatly hinders its application in batteries.

Method used

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  • A kind of cobalt disulfide/sulfur nitrogen co-doped graphene catalytic material and its preparation and application
  • A kind of cobalt disulfide/sulfur nitrogen co-doped graphene catalytic material and its preparation and application
  • A kind of cobalt disulfide/sulfur nitrogen co-doped graphene catalytic material and its preparation and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 200 mg of graphene oxide and add it to 10 mL of deionized water, and ultrasonically mix for 4 hours in a 300W ultrasonic cleaner to obtain a uniform dispersion. Weigh again 250mg morpholineethanesulfonic acid (C 6 h 13 NO 4 S, 99.0%) was added to the above-mentioned dispersion liquid, and it was also ultrasonicated in a 300W ultrasonic cleaner for 30 minutes, stirred for 1 hour, and 10 mL of 0.38 mol L was added after mixing evenly -1 Cobalt nitrate (Co(NO 3 ) 2 , 99.0%) and 0.608g of sulfur powder were stirred evenly to obtain a mixed solution.

[0036](2) The mixed liquid obtained in step (1) was transferred into a 100 mL sealed steel shell of a hydrothermal kettle, and reacted for 3 hours at a temperature of 150° C. in an electric thermostat blast drying oven. After the temperature is lowered to room temperature, the hydrothermal reaction product is separated from the solid and liquid, and the obtained solid is washed twice with absolute ethanol, and t...

Embodiment 2

[0047] (1) Weigh 100 mg of graphene oxide and add it to 10 mL of deionized water, and ultrasonically mix for 2 hours in a 300W ultrasonic cleaner to obtain a uniform dispersion. Weigh again 200mg morpholineethanesulfonic acid (C 6 h 13 NO 4 S, 99.0%) was added to the above-mentioned dispersion liquid, and it was also ultrasonicated in a 300W ultrasonic cleaner for 30 minutes, stirred for 5 hours, and 10 mL of 0.38 mol L was added after mixing evenly -1 Cobalt nitrate (Co(NO 3 ) 2 , 99.0%) and 0.608g of sulfur powder were stirred evenly to obtain a mixed solution.

[0048] (2) The mixed liquid obtained in step (1) was transferred into a 100 mL sealed steel shell of a hydrothermal kettle, and reacted for 5 hours at a temperature of 180° C. in an electric thermostat blast drying oven. After the temperature is lowered to room temperature, the hydrothermal reaction product is separated from the solid and liquid, and the obtained solid is washed with absolute ethanol for 3 time...

Embodiment 3

[0052] (1) Weigh 200 mg of graphene oxide and add it to 10 mL of deionized water, and ultrasonically mix for 2 hours in a 300W ultrasonic cleaner to obtain a uniform dispersion. Weigh again 300mg morpholineethanesulfonic acid (C 6 h 13 NO 4 S, 99.0%) was added to the above-mentioned dispersion liquid, and it was also ultrasonicated in a 300W ultrasonic cleaner for 30 minutes, stirred for 3 hours, and 10 mL of 0.38 mol L was added after mixing evenly -1 Cobalt nitrate (Co(NO 3 ) 2 , 99.0%) and 0.608g sulfur powder were stirred evenly to obtain the mixed solution

[0053] (2) The mixed liquid obtained in step (1) was transferred into a 100 mL sealed steel shell of a hydrothermal kettle, and reacted for 3 hours at a temperature of 160° C. in an electric thermostat blast drying oven. After the temperature is lowered to room temperature, the hydrothermal reaction product is separated from the solid and liquid, and the obtained solid is washed twice with absolute ethanol, and t...

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Abstract

The invention belongs to the field of electrocatalytic materials and discloses a cobalt disulfide / sulfur-nitrogen co-doped graphene catalytic material as well as preparation and application. The preparation comprises the following steps: ultrasonically dispersing graphene oxide into de-ionized water; sequentially adding morpholineethanesulfonic acid, cobalt metal salt and sulfur powder and uniformly stirring and mixing to obtain a mixed solution; carrying out hydrothermal reaction on the obtained mixed solution at 150 to 180 DEG C to obtain precursor solid powder; then heating the precursor solid powder to 300 to 600 DEG C and carrying out calcination treatment; after cooling, obtaining the cobalt disulfide / sulfur-nitrogen co-doped graphene catalytic material. The preparation method provided by the invention is simple; the prepared cobalt disulfide / sulfur-nitrogen co-doped graphene catalytic material has a stable structure and good conducting performance and has excellent catalytic performance and high stability when being used as the electrocatalytic material.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and in particular relates to a cobalt disulfide / sulfur nitrogen co-doped graphene catalytic material and its preparation and application. Background technique [0002] Fuel Cells is a new energy technology that directly converts the chemical energy of fuel into electrical energy in an efficient and environmentally friendly manner, because of its high energy conversion efficiency, low impact on the environment (zero or low emission), and fuel diversification. They have received widespread attention due to their many advantages; they are known as the fourth generation of power generation technology after water power, fire power and nuclear power. Among them, the proton exchange membrane fuel cell has the advantages of low operating temperature and fast start-up speed, and is considered to be the most promising alternative to the internal combustion engine as the future automotive power pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9083Y02E60/50
Inventor 蒋仲杰陈泊宏刘美林
Owner SOUTH CHINA UNIV OF TECH