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Silver selenide-cobalt diselenide composite material with Turing structure as well as preparation method and application of silver selenide-cobalt diselenide composite material

A technology of cobalt diselenide and composite materials, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor understanding of catalysts, and achieve good electrocatalytic moisture analysis and oxygen performance. Effect of high Faraday efficiency and low energy efficiency

Active Publication Date: 2020-06-30
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to design Turing structures to make catalysts rich in interfacial structures is poorly understood

Method used

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  • Silver selenide-cobalt diselenide composite material with Turing structure as well as preparation method and application of silver selenide-cobalt diselenide composite material
  • Silver selenide-cobalt diselenide composite material with Turing structure as well as preparation method and application of silver selenide-cobalt diselenide composite material
  • Silver selenide-cobalt diselenide composite material with Turing structure as well as preparation method and application of silver selenide-cobalt diselenide composite material

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preparation example Construction

[0034] The invention provides a preparation method of silver selenide-cobalt diselenide composite material with Turing structure, comprising: mixing and reacting nanoribbon-shaped cobalt diselenide, silver salt, water and amine solvent to obtain Silver selenide-cobalt diselenide composite material with spirit structure.

[0035] Wherein, the present invention has no special limitation on the sources of all raw materials, which can be commercially available or self-made.

[0036] The nanoribbon-shaped cobalt diselenide is preferably prepared according to the following method: cobalt salt, sodium selenite, water and amine solvent are mixed, heated and reacted to obtain nanoribbon-shaped cobalt diselenide; the cobalt salt is preferably soluble Inorganic cobalt salt, more preferably one or more of cobalt sulfate, cobalt acetate and cobalt nitrate, more preferably cobalt acetate; the molar ratio of the cobalt salt and sodium selenite is preferably 1: (0.8~1.2) , more preferably 1:...

Embodiment 1

[0047] Dissolve 20mg of nanoribbon-shaped cobalt diselenide and 20mg of silver nitrate in a mixed solution of 10mL diethylenetriamine and 5mL deionized water, and obtain a uniform solution after ultrasonication at 300W for 5min, then put it into a 50mL beaker at room temperature 200rpm After stirring for four hours, the obtained product was centrifuged, washed three times with deionized water and three times with ethanol, and dried in vacuum to obtain a silver selenide-cobalt diselenide composite material with a Turing structure.

[0048] Utilize scanning electron microscope to analyze the Turing structure silver selenide-cobalt diselenide obtained in embodiment 1, obtain its scanning electron microscope picture, as figure 1 shown.

[0049] Utilize transmission electron microscope to analyze the silver selenide-cobalt diselenide composite material with Turing structure obtained in embodiment 1, obtain its transmission electron microscope photograph, as figure 2 shown.

[00...

Embodiment 2

[0055] Dissolve 20mg of nanoribbon-shaped cobalt diselenide and 5mg of silver nitrate in a mixed solution of 10mL diethylenetriamine and 5mL deionized water, and obtain a uniform solution after ultrasonication at 300W for 5min, then put it into a 50mL beaker at room temperature 200rpm After stirring for four hours, the obtained product was centrifuged, washed three times with deionized water and three times with ethanol, and dried in vacuum to obtain a silver selenide-cobalt diselenide composite material with a Turing structure.

[0056] Utilize scanning electron microscope to analyze the silver selenide-cobalt diselenide composite material with Turing structure obtained in embodiment 2, obtain its scanning electron microscope picture, as Image 6 shown.

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Abstract

The invention provides a preparation method of a silver selenide-cobalt diselenide composite material with a Turing structure, wherein the preparation method comprises the steps: carrying out mixed reaction on nano strip-shaped cobalt diselenide, a silver salt, water and an amine solvent, to obtain the silver selenide-cobalt diselenide composite material with the Turing structure. Compared with the prior art, according to the preparation method disclosed by the invention, the regulation on the morphology of the silver selenide-cobalt diselenide composite material is realized; the interface density of the obtained silver selenide-cobalt diselenide composite material with the Turing structure is larger than that of most materials with interface structures, so that the silver selenide-cobaltdiselenide composite material with the Turing structure has excellent electro-catalytic moisture oxygen evolution performance, high Faraday efficiency, high energy efficiency and low overvoltage.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic moisture analysis for oxygen, and in particular relates to a silver selenide-cobalt diselenide composite material with Turing structure, its preparation method and application. Background technique [0002] In recent years, due to excessive dependence on fossil fuel resources, it has had a serious negative impact on the ecological environment and the global economy. The use of electrochemical conversion processes to produce clean and efficient energy does not affect the environment. Among them, the conversion of renewable electricity into chemical fuels through water electrolysis, carbon dioxide reduction and metal-air batteries are the most common electrochemical conversion methods in recent years, but the main bottleneck is the need for a highly efficient, stable and economical catalytic analysis. Catalysts for oxygen reactions. [0003] Recently, a variety of methods to enhance the a...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J35/00B01J35/02C25B1/04C25B11/06
CPCB01J27/0573C25B1/04C25B11/091B01J35/31B01J35/00B01J35/30B01J35/33Y02E60/36
Inventor 高敏锐张晓隆高飞跃杨朋朋
Owner UNIV OF SCI & TECH OF CHINA
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