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Molybdenum disulfide and carbon nanotube composite material catalyst as well as preparation and application thereof

A technology of carbon nanotubes and molybdenum disulfide, which is applied in the field of electrocatalytic materials, can solve the problems of poor hydrogen evolution performance and achieve the effects of simple operation, strong controllability and wide source of materials

Pending Publication Date: 2020-11-27
DALIAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a molybdenum disulfide and carbon nanotube composite material electrocatalyst to solve the problem of poor electrocatalytic hydrogen evolution performance in the prior art, and at the same time make the molybdenum disulfide after the composite carbon nanotube has an adjustable interlayer distance

Method used

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  • Molybdenum disulfide and carbon nanotube composite material catalyst as well as preparation and application thereof
  • Molybdenum disulfide and carbon nanotube composite material catalyst as well as preparation and application thereof
  • Molybdenum disulfide and carbon nanotube composite material catalyst as well as preparation and application thereof

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preparation example Construction

[0041] The invention relates to a preparation method and application of an electrocatalytic hydrogen evolution electrocatalyst with controllable interlayer spacing molybdenum disulfide / carbon nanotube, and belongs to the technical field of electrocatalytic material preparation. The method comprises the following steps: respectively dissolving organic sulfur source, molybdate and carbon nanotube in a solvent; mixing molybdenum salt and sulfur source and adding carbon nanotube solution to carry out hydrothermal reaction; centrifuging and separating with water and ethanol respectively Washing; drying to obtain solid powder; cooling to room temperature to obtain the product. The above catalyst is added to the sulfuric acid solution, and the electrocatalytic hydrogen evolution reaction is completed by using three electrodes as a working system.

[0042] details as follows:

[0043] S1. Mix 10-20mL deionized water and 10-20mL N,N-dimethylamide 1:2 as a solvent, mix 0.05-0.1g organi...

Embodiment 1

[0048] First, 0.2 g of carbon nanotubes were dispersed in a mixed solvent containing 5 mL of distilled water and 10 mL of N,N-dimethylamide solution. Next, dissolve 0.0846g of sodium molybdate in 5mL of distilled water and stir thoroughly for 30min until uniform. Then 0.1052g of dithiooxamide was uniformly dispersed in 10mL of N,N-dimethylamide solution. Finally, the three solutions were mixed, fully stirred for 30 minutes until uniform, and then loaded into a 1-2 MPa autoclave (the volume of the filled solution accounted for 60% of the volume of the autoclave lining during the reaction), and reacted at a constant temperature of 180°C for 24 hours. The product was cooled to room temperature for centrifugation, washed with water and ethanol solution for 6 times, and dried at 60°C to collect the powder. Get the final product MoS 2 / CNT.

[0049] figure 1 is the MoS obtained in this example 2 / CNT electrocatalyst XRD diffraction pattern, compared with the PDF standard card, ...

Embodiment 2

[0052] Firstly, 0.3 g of carbon nanotubes were dispersed in a mixed solvent containing 5 mL of distilled water and 10 mL of N,N-dimethylamide solution. Next, dissolve 0.0846g of sodium molybdate in 5mL of distilled water and stir thoroughly for 30min until uniform. Then 0.1052g of dithiooxamide was uniformly dispersed in 10mL of N,N-dimethylamide solution. Finally, the three solutions were mixed, fully stirred for 30 minutes until uniform, and then loaded into a 1-2 MPa autoclave (the volume of the filled solution accounted for 60% of the volume of the autoclave lining during the reaction), and reacted at a constant temperature of 180°C for 24 hours. The product was cooled to room temperature for centrifugation, washed with water and ethanol solution for 6 times, and dried at 60°C to collect the powder. Get the final product MoS 2 / CNT.

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Abstract

The invention provides a molybdenum disulfide and carbon nanotube composite material catalyst. The preparation method comprises the following steps: by taking deionized water and N, N-dimethylformamide as a solvent, mixing an organic sulfide, a molybdenum salt compound and a carbon nanotube with a molybdenum salt solution and a sulfur source compound, and then adding a carbon nanotube solution, sufficiently and uniformly stirring, carrying out a hydrothermal reaction, carrying out centrifugal separation, respectively washing with water and ethanol, and drying so as to obtain solid powder; andcooling to room temperature to obtain the product. The use method comprises the following steps: adding the catalyst into a sulfuric acid solution, and completing an electrocatalytic hydrogen evolution reaction by taking three electrodes as a working system. According to the prepared electrocatalyst, the interlayer spacing of molybdenum disulfide compounded with the carbon nanotubes is controllably changed, more reaction active sites are exposed, and the electrocatalytic hydrogen evolution performance of molybdenum disulfide is improved; molybdenum disulfide growing on the carbon nanotubes hasa flower-sheet-shaped structure, so that the specific surface area is increased, and excellent adsorption capacity is shown.

Description

technical field [0001] The invention relates to the field of electrocatalytic materials, and more specifically relates to the preparation of an electrocatalyst composed of molybdenum disulfide and carbon nanotube composite material with controllable layer spacing synthesized from organic sulfides and the application of electrocatalytic hydrogen evolution. Background technique [0002] With the deepening of people's demand for energy, how to use clean, cheap and reliable energy to alleviate the surge in energy consumption has become more serious. In order to meet the energy demand, many explorations have been carried out. Among them, the electrocatalytic technology has attracted great attention, and the products of the electrocatalytic reaction process provide the basis for sustainable development in the future. For example, the hydrogen evolution reaction occupies an important position in electrocatalytic reactions. The hydrogen evolution reaction has attracted attention a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/02B01J35/10B82Y30/00C25B11/06C25B1/02B01J35/00
CPCB01J27/051B82Y30/00C25B1/02B01J35/00B01J35/30B01J35/61
Inventor 董晓丽许文文王宇郑楠
Owner DALIAN POLYTECHNIC UNIVERSITY
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