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Sulfur and nitrogen codoping graphene loaded vulcanized cobalt and nickel catalytic material and preparation and application

A technology of cobalt-nickel sulfide and catalytic materials, which is applied in the field of electrochemical materials to achieve the effects of good conductivity, high current density and good stability

Inactive Publication Date: 2018-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no report on the application of sulfur and nitrogen co-doped graphene-supported spherical cobalt-nickel sulfide materials to catalyze hydrogen evolution and oxygen evolution reactions in water electrolysis.

Method used

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  • Sulfur and nitrogen codoping graphene loaded vulcanized cobalt and nickel catalytic material and preparation and application
  • Sulfur and nitrogen codoping graphene loaded vulcanized cobalt and nickel catalytic material and preparation and application
  • Sulfur and nitrogen codoping graphene loaded vulcanized cobalt and nickel catalytic material and preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Weigh 1mmol of cobalt acetate, 2mmol of nickel acetate and 9mmol of thiourea and dissolve them in 20mL of water and 30mL of tert-butanol solution, and stir at room temperature for 2 hours to obtain a uniformly mixed solution; slowly dropwise add 2mL of Ammonia and stirred for 2h to obtain a homogeneous solution.

[0040] (2) Add 40 mg of graphene oxide sol to the homogeneous solution in step (1), ultrasonically homogenize and stir for 1 h; transfer the solution obtained above to a 100 mL reactor, and perform a hydrothermal reaction at 180° C. for 12 h; The hydrothermal reaction product was subjected to centrifugal separation, washed with water and absolute ethanol three times respectively, then subjected to freezing treatment and dried in a vacuum freeze-drying oven for 24 hours to obtain a graphene-supported cobalt-nickel sulfide composite material.

[0041](3) Put the obtained graphene-supported cobalt-nickel sulfide composite material into a porcelain boat and pl...

Embodiment 2

[0046] (1) Weigh 1mmol of cobalt acetate, 2mmol of nickel acetate and 9mmol of thiourea and dissolve them in 20mL of water and 30mL of tert-butanol solution, and stir at room temperature for 3h to obtain a uniformly mixed solution; slowly dropwise add 2mL of Ammonia and stirred for 1h to obtain a homogeneous solution.

[0047] (2) Add 30.4mg of graphene oxide sol to the homogeneous solution in step (1), ultrasonically homogenize and stir for 1h; transfer the solution obtained above to a 100mL reactor, and perform a hydrothermal reaction at 150°C for 10h The hydrothermal reaction product is subjected to centrifugation, washed with water and absolute ethanol three times respectively, then subjected to freezing treatment and dried in a vacuum freeze-drying oven for 48 hours to obtain a graphene-supported cobalt-nickel sulfide composite material.

[0048] (3) Put the obtained graphene-supported cobalt-nickel sulfide composite material into a porcelain boat and place it in a tube f...

Embodiment 3

[0052] (1) Weigh 1mmol of cobalt acetate, 2mmol of nickel acetate and 9mmol of thiourea and dissolve them in 20mL of water and 30mL of tert-butanol solution, and stir at room temperature for 4h to obtain a uniformly mixed solution; slowly dropwise add 2mL of Ammonia and stirred for 1h to obtain a homogeneous solution.

[0053] (2) Add 304 mg of graphene oxide sol to the homogeneous solution in step (1), ultrasonically homogenize and stir for 2 h; transfer the solution obtained above to a 100 mL reactor, and perform a hydrothermal reaction at 200° C. for 15 h; The hydrothermal reaction product was subjected to centrifugation, washed with water and absolute ethanol three times respectively, then subjected to freezing treatment and dried in a vacuum freeze-drying oven for 36 hours to obtain a graphene-supported cobalt-nickel sulfide composite material.

[0054] (3) Put the obtained graphene-supported cobalt-nickel sulfide composite material into a porcelain boat and place it in a...

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Abstract

The invention belongs to the field of electrochemical materials, and discloses a sulfur and nitrogen codoping graphene loaded vulcanized cobalt and nickel catalytic material and preparation and application. A metal cobalt source, a nickel source and thiourea are dissolved in a solvent, a mixture is subjected to ultrasonic stirring and mixing, later, ammonium hydroxide is added dropwise, a mixtureis stirred and mixed, then, graphene oxide is added, a mixture is subjected to ultrasonic stirring and mixing and then subjected to hydro-thermal treatment, next, centrifugal washing and freeze dryingare carried out, and a graphene loaded vulcanized cobalt and nickel composite material is obtained; and then, in a nitrogen atmosphere, calcination treatment is carried out, graphene oxide is furtherreduced to obtain the sulfur and nitrogen codoping graphene loaded vulcanized cobalt and nickel catalytic material. The synthetic method is simple, the cost is low, the energy consumption is relatively low, environmental friendliness is achieved, and the obtained product has good electrical conductivity and electrochemical catalysis performance and is suitable for actual application of a water cracked cathode and anode catalytic material.

Description

technical field [0001] The invention belongs to the field of electrochemical materials, and in particular relates to a sulfur-nitrogen co-doped graphene-loaded cobalt-nickel sulfide catalytic material and its preparation and application. Background technique [0002] The development of the current society is highly dependent on fossil fuels, making our economy extremely vulnerable to fluctuations in the price of fossil fuels; in addition, the excessive use of fossil fuels has exacerbated environmental pollution and the greenhouse effect. Therefore, it is imminent to develop a clean, renewable, environmentally friendly and non-polluting alternative energy source. Primary energy represented by oil, coal, and natural gas will eventually be replaced by clean and renewable energy such as solar energy, wind energy, ocean energy, and biomass energy. Compared with various alternative energy sources, hydrogen energy, as an all-weather resource, can be produced by electrolysis of wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06C01G53/00
CPCC01G53/006C25B1/04C25B11/091Y02E60/36
Inventor 蒋仲杰邓冰露
Owner SOUTH CHINA UNIV OF TECH
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