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Carbon cloth loaded CoS2/MoS2 heterojunction composite material and preparation method and application thereof

A composite material, heterojunction technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc. The effect of broad application prospect, simple equipment and simple process

Pending Publication Date: 2020-08-07
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such materials have poor electrical conductivity, hindered electron transport, and low intrinsic activity, making it difficult to match the electrochemical activity of noble metal catalysts.
In addition, the relatively complex synthesis conditions and instability of the materials in unfavorable pH environments also limit their popularization and application.

Method used

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  • Carbon cloth loaded CoS2/MoS2 heterojunction composite material and preparation method and application thereof
  • Carbon cloth loaded CoS2/MoS2 heterojunction composite material and preparation method and application thereof
  • Carbon cloth loaded CoS2/MoS2 heterojunction composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A carbon cloth supported CoS 2 / MoS 2 A method for preparing a heterojunction composite material, comprising the following steps:

[0041] Weigh 0.33mmol CoCl 2 ·6H 2 O and 0.66mmol PMo 12 , add a certain amount of water, stir to dissolve; then add 4mmol C 2 h 4 NS, stirred for 30 minutes, placed in a 50mL reaction kettle, and added a piece of carbon cloth with a size of 2*4, followed by a hydrothermal reaction in an oven at 180°C for 24 hours. After the reaction was completed, the carbon cloth was rinsed with water and ethanol in sequence; CoS loaded on the prepared carbon cloth 2 / MoS2 The composite material was placed in a porcelain boat, and under an inert atmosphere, the temperature was programmed to rise to 400°C at 2°C / min for heat treatment, and kept at this temperature for 60 minutes, and then cooled to obtain the final product.

Embodiment 2

[0043] A carbon cloth supported CoS 2 / MoS 2 A method for preparing a heterojunction composite material, comprising the following steps:

[0044] Weigh 0.33mmol CoCl 2 ·6H 2 O and 0.66mmol PMo 12 , add a certain amount of water, stir to dissolve; then add 4mmol C 2 h 4 NS, stirred for 30 minutes, placed in a 50mL reaction kettle, and added a piece of carbon cloth with a size of 2*4, followed by a hydrothermal reaction in an oven at 180°C for 24 hours. After the reaction was completed, the carbon cloth was rinsed with water and ethanol in sequence; CoS loaded on the prepared carbon cloth 2 / MoS 2 The composite material is placed in a porcelain boat, under an inert atmosphere, the temperature is programmed to rise to 400°C at 2°C / min for heat treatment, and kept at this temperature for 10 minutes, and then cooled to obtain the final product.

Embodiment 3

[0046] A carbon cloth supported CoS 2 / MoS 2 A method for preparing a heterojunction composite material, comprising the following steps:

[0047] Weigh 0.33mmol CoCl 2 ·6H 2 O and 0.66mmol PMo 12 , add a certain amount of water, stir to dissolve; then add 4mmol C 2 h 4 NS, stirred for 30 minutes, placed in a 50mL reaction kettle, and added a piece of carbon cloth with a size of 2*4, followed by a hydrothermal reaction in an oven at 180°C for 24 hours. After the reaction was completed, the carbon cloth was rinsed with water and ethanol in sequence; CoS loaded on the prepared carbon cloth 2 / MoS 2 The composite material is placed in a porcelain boat, under an inert atmosphere, the temperature is programmed to rise to 400°C at 2°C / min for heat treatment, and kept at this temperature for 30 minutes, and then cooled to obtain the final product.

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Abstract

The invention discloses a carbon cloth loaded CoS2 / MoS2 heterojunction composite material and a preparation method thereof and an application of the composite material as a water electrolysis catalyst. The preparation method comprises the following steps: mixing a metal cobalt salt, a molybdenum source and a sulfur source in a solution, adding a piece of carbon cloth, carrying out hydrothermal reaction, washing and drying after the hydrothermal reaction is finished, placing the obtained material in an inert atmosphere, carrying out programmed heating to a certain temperature, and carrying outannealing treatment to obtain the carbon cloth loaded CoS2 / MoS2 heterojunction composite material. Compared with the prior art, the method is simple to operate and easy for large-scale production; andthe carbon cloth is beneficial to improving the conductivity and stability of the material, and the CoS2 / MoS2 heterostructure can optimize the electronic structure and improve the catalytic activity.

Description

technical field [0001] The invention relates to a carbon cloth loaded CoS 2 / MoS 2 The heterojunction composite material and its preparation method and application belong to the technical field of electrolytic water catalysts. Background technique [0002] In recent years, the excessive consumption of traditional fossil fuels and the growing demand for energy have forced people to explore new energy sources to replace traditional fossil fuels. Hydrogen energy has attracted widespread attention because of its high energy density, abundant reserves and environmental friendliness. Among various hydrogen production methods, hydrogen production by electrolysis of water is an efficient and environmentally friendly hydrogen production method. At present, the water electrolysis process includes two half-reactions, the hydrogen evolution reaction (HER) at the cathode and the oxygen evolution reaction (OER) at the anode. Due to the large activation energy barriers of the two react...

Claims

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Application Information

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IPC IPC(8): B01J27/051C25B1/04C25B11/06
CPCB01J27/0515C25B1/04C25B11/057C25B11/051C25B11/091B01J35/33Y02E60/36
Inventor 徐林周光耀林英姿赵明明吴小妹唐亚文
Owner NANJING NORMAL UNIVERSITY