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Transition metal sulfide/carbon nanotube composite material as well as preparation method and application thereof

A technology of carbon nanotubes and transition metals, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, and electrolytic inorganic material coatings. Effect

Inactive Publication Date: 2017-05-17
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods did improve the oxygen evolution performance of sulfides, the catalytic efficiencies of most reported sulfide-based electrocatalysts did not reach a level comparable to that of RuO 2 or IrO 2 level of

Method used

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  • Transition metal sulfide/carbon nanotube composite material as well as preparation method and application thereof
  • Transition metal sulfide/carbon nanotube composite material as well as preparation method and application thereof
  • Transition metal sulfide/carbon nanotube composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: prepare highly hydrophilic porous iron sulfide / carbon nanotube composite material (FeS 2 / CNTs)

[0045] (1) Electrode pretreatment: take a glassy carbon electrode (PINE USA, rotating disk electrode, diameter 5mm), and perform polishing, washing, and 16KHz ultrasonic pretreatment for 10s in sequence;

[0046] (2) Preparation of carbon nanotube-modified glassy carbon electrodes: Add arrayed carbon nanotubes (1mg) to a mixture (1mL) of ethanol and water with a volume ratio of 1:1, and form a suspension by ultrasonication at 16KHz for 1h. The suspension is added dropwise on the surface of the glassy carbon electrode pretreated in step (1), and dried naturally to form a uniform thin layer of carbon nanotubes (the thin layer is about 40 μg of carbon nanotubes), to obtain carbon nanotube-modified Glassy carbon electrode;

[0047] (3) Preparation of electroplating solution: Add precursor thiourea (9.1344g, 0.3mol / L) and ferric chloride (0.1590g, 2mmol / L) to dei...

Embodiment 2

[0050] Embodiment 2: prepare highly hydrophilic porous cobalt sulfide / carbon nanotube composite material (CoS 2 / CNTs)

[0051] (1) Electrode pretreatment: Take a glassy carbon electrode (PINE USA, rotating disk electrode, diameter 5mm), and perform polishing, washing, and 20KHz ultrasonic pretreatment for 60s in sequence;

[0052] (2) Preparation of carbon nanotube-modified glassy carbon electrodes: Add arrayed carbon nanotubes (1mg) to a mixture (1mL) of ethanol and water with a volume ratio of 1:4, and form a suspension by ultrasonication at 40KHz for 2h. The suspension is added dropwise on the surface of the glassy carbon electrode pretreated in step (1), and dried naturally to form a uniform thin layer of carbon nanotubes (the thin layer is about 40 μg of carbon nanotubes), to obtain carbon nanotube-modified Glassy carbon electrode;

[0053] (3) Preparation of electroplating solution: add precursor thiourea (18.2688g, 0.6mol / L) and cobalt chloride (0.3807g, 4mmol / L) to ...

Embodiment 3

[0057] Embodiment 3: prepare highly hydrophilic porous nickel sulfide / carbon nanotube composite material (NiS 2 / CNTs)

[0058] (1) Electrode pretreatment: take a glassy carbon electrode (PINE USA, rotating disk electrode, diameter 5mm), and perform polishing, water washing, and 32KHz ultrasonic pretreatment for 30s in sequence;

[0059] (2) Preparation of carbon nanotube-modified glassy carbon electrodes: Add arrayed carbon nanotubes (1mg) to a mixture (1mL) of ethanol and water with a volume ratio of 1:5, and form a suspension by ultrasonication at 28KHz for 5h. The suspension is added dropwise on the surface of the glassy carbon electrode pretreated in step (1), and dried naturally to form a uniform thin layer of carbon nanotubes (the thin layer is about 40 μg of carbon nanotubes), to obtain carbon nanotube-modified Glassy carbon electrode;

[0060] (3) Preparation of electroplating solution: add precursor thiourea (27.4032g, 0.9mol / L) and nickel chloride (0.5705g, 8mmol / ...

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Abstract

The invention provides a transition metal sulfide / carbon nanotube composite material. A preparation method of the transition metal sulfide / carbon nanotube composite material comprises the following steps: adding carbon nanotubes to a solvent, forming a suspension by ultrasonic treatment; dropping the suspension on the surface of a pretreated glassy carbon electrode; naturally airing to form a uniform thin layer of carbon nanotubes, to obtain a carbon nanotube-modified glassy carbon electrode; adding thiourea and transition metal salt to deionized water; adjusting pH to 0-13 to obtain an electroplating solution; placing the carbon nanotube-modified glassy carbon electrode in the electroplating solution for electroplating to obtain the glassy carbon electrode covered with a transition metal sulfide / carbon nanotube composite material; washing with water and drying naturally; scraping the transition metal sulfide / carbon nanotube composite material from the surface of the glassy carbon electrode. The preparation method provided by the invention is simple in operation and easy in mass production; the prepared composite material has great advantages in catalytic oxygen evolution and energy conversion, and can be used as a catalyst for photo and electro-catalytic oxygen evolution reaction.

Description

[0001] (1) Technical field [0002] The invention belongs to the research field of nanocomposite materials, in particular to a highly hydrophilic porous transition metal sulfide / carbon nanotube composite material prepared by an electrochemical simultaneous deposition and dissolution method, and its application research as an electrocatalyst; The above transition metal sulfide / carbon nanotube composites are denoted as MS 2 / CNT, wherein, M=Co, Ni, Fe or a mixture of the three in any proportion. [0003] (2) Background technology [0004] As a non-renewable energy source, traditional fossil energy is facing a major crisis of resource depletion, and a series of environmental problems brought about by the use of fossil energy have a great relationship with the combustion of this type of energy. Therefore, it is imminent to actively develop clean and renewable energy. Due to the advantages of clean, renewable, high conversion efficiency and wide application range, fuel cells have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J35/10B01J37/34C25D9/04C25B11/06C25B1/04
CPCC25B1/04C25D9/04B01J27/043B01J37/348C25B1/55C25B11/057C25B11/051C25B11/075B01J35/33B01J35/60B01J35/39Y02E60/36
Inventor 杨植阳济章聂华贵葛梦展侯俊婕黄少铭
Owner WENZHOU UNIVERSITY
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