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MoS<x>/carbon black nanometer composite material and preparation method and application thereof

A technology of nano-composite materials and carbon black, applied in the field of composite materials, can solve the problems of complex preparation methods and gaps in catalytic performance, and achieve the effects of increasing catalytic performance, improving performance and enhancing electrical conductivity.

Active Publication Date: 2017-07-18
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these current studies, the preparation methods of composite materials are generally very complicated, and organic solvents are often used, and the catalytic performance is still far behind that of platinum-based noble metal catalysts.

Method used

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  • MoS&lt;x&gt;/carbon black nanometer composite material and preparation method and application thereof
  • MoS&lt;x&gt;/carbon black nanometer composite material and preparation method and application thereof
  • MoS&lt;x&gt;/carbon black nanometer composite material and preparation method and application thereof

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preparation example Construction

[0036] The present invention also provides a method for preparing the aforementioned nanocomposite material, wherein the method includes the following steps:

[0037] (1) Disperse carbon black in water, preferably ultrasonically for 10-30 minutes, to obtain a carbon black dispersion;

[0038] In a specific embodiment of the present invention, the ratio of carbon black to water is preferably 1-16 mg:1 mL, and the carbon black is selected from at least one of acetylene black, Cabot carbon black, and Ketjen black, preferably It is at least one of Cabot Black XC-72, Cabot Black XC-72R or Cabot Black BP-2000. The higher the conductivity of these carbon blacks, the prepared MoS x / Carbon black nanocomposite material has better conductivity. During specific implementation, the ultrasonic power can be 500-1200W.

[0039] (2) The sulfur source and the molybdenum source are added to the carbon black dispersion to obtain a mixed solution;

[0040] In the specific implementation process, the sul...

Embodiment 1

[0051] Example 1: MoS x / Preparation and Application of Carbon Black Nanocomposite

[0052] Prepare MoS x / Carbon black nanocomposite

[0053] Disperse 200mg of acetylene black into 50ml of deionized water (4mg / mL), and use an ultrasonic processor to ultrasonically disperse for 10 minutes at room temperature (ultrasonic power of 650W) to obtain an acetylene black dispersion; subsequently, add 200mg of ammonium tetrathiomolybdate, The mixed solution is obtained; the mixed solution is transferred to a 100ml polytetrafluoroethylene-lined hydrothermal kettle, and then sent to a preheated 220°C blast oven to react for 24 hours. After the reaction is completed, the oven is closed and allowed to cool naturally. Filter and wash with deionized water; dry the washed product in a vacuum oven at 40°C for 12 hours to obtain powdered MoS x / Carbon black nanocomposite materials. The preparation process and principle are as figure 1 Shown.

[0054] For the prepared MoS x / Carbon black nanocomposi...

Embodiment 2

[0065] Example 2: MoS x / C Preparation of Nanocomposites

[0066] The acetylene black in Example 1 was changed to Cabot Black XC-72, and the other preparation conditions of the composite material were the same as in Example 1. MoS was prepared under these conditions x / Carbon black nanocomposite, MoS x The mass percentage of 1T is about 25%, the content of 1T is about 50%, and the atomic ratio of Mo and S is 1:2.11.

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PUM

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Abstract

The embodiment of the invention discloses a MoS<x> / carbon black nanometer composite material and a preparation method and application thereof. In the MoS<x> / carbon black nanometer composite material, x is more than or equal to 2 but less than or equal to 2.3, and based on total mass of the nanometer composite material, the mass percent of MoS<x> accounts for 5-50%. Compared with a 20% Pt / c catalyst, the prepared MoS<x> / carbon black nanometer composite material has the advantages that the performance is equivalent and is even improved by about 20%; and moreover, the prepared MoS<x> / carbon black nanometer composite material also has favorable catalytic stability, and the catalytic performance is not obviously reduced after catalytic circulation for 5,000 times.

Description

Technical field [0001] The present invention relates to the field of composite materials, in particular to a MoS x / Carbon black nanocomposite material, its preparation method and its application. Background technique [0002] As a clean new energy, hydrogen is of great significance to environmental protection and energy security. How to produce hydrogen on a large scale is a basic problem for the commercial use of hydrogen energy. The electrochemical hydrogen evolution reaction (Hydrogen Evolution Reaction, HER) is regarded as a feasible solution for large-scale hydrogen production, but this reaction has a higher cathode overpotential on the cathode, which leads to a substantial increase in the energy cost of hydrogen production. As the catalyst of this reaction, platinum-based precious metals can reduce the cathode overpotential. However, due to the limited reserves of platinum-based precious metals on the earth, they cannot meet the needs of large-scale applications. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/86H01M8/0606H01M8/22
CPCH01M4/362H01M4/5815H01M4/583H01M4/86H01M8/0606H01M8/22C01G39/06C25B11/04C25B1/04H01M8/0656H01M2250/20Y02E60/36Y02P70/50Y02T90/40Y02E60/50Y02E60/10H01M4/366H01M2004/8689
Inventor 翟茂林曹朋飞彭静李久强
Owner PEKING UNIV
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