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Molybdenum disulfide with atomic layer steps and preparation method thereof

A molybdenum disulfide and atomic layer technology, applied in the fields of molybdenum sulfide, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of insufficient boundary of molybdenum disulfide and low catalytic performance of hydrogen evolution

Active Publication Date: 2020-01-07
TAIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose a method for forming molybdenum disulfide atomic layer steps, increase the atomic layer boundary, and expose more active sites, thereby overcoming the shortcomings of insufficient molybdenum disulfide boundary and low hydrogen evolution catalytic performance, and improving the efficiency of molybdenum disulfide. Electrocatalytic Hydrogen Evolution Activity of Molybdenum

Method used

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  • Molybdenum disulfide with atomic layer steps and preparation method thereof
  • Molybdenum disulfide with atomic layer steps and preparation method thereof
  • Molybdenum disulfide with atomic layer steps and preparation method thereof

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Embodiment Construction

[0026] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0027] The concrete steps of this embodiment are as follows:

[0028] ① Pretreatment of raw materials: use molybdenum disulfide with a purity of 99.99%, grind; perform ultrasonic peeling in a warm water bath, peeling time is 2 hours, and the temperature of the water bath is 60°C;

[0029] ② Centrifugal cleaning: Disperse the sample obtained by stripping in step ① in deionized water, then place it in a centrifuge and centrifuge at a speed of 8000 rpm; pour off the supernatant, and redisperse the cleaned sample in deionized water , repeat the above operation 3 times; dry in a blast drying oven at a drying temperature of 40°C for 2 hours;

[0030] ③ Prepare the dispersion solution: add 25 ml of deionized water to the beaker; add 20 ml of ethanol to the beaker; add 5 ml of PVP to the beaker; stir the mixed solution evenly with a glass rod, an...

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Abstract

The invention discloses a method for preparing molybdenum disulfide nanosheets with atomic layer steps, which is characterized by comprising the following steps: pretreating raw materials; centrifugally cleaning; preparing a dispersion solution; dispersing a sample; performing pulse laser processing; and performing centrifugal cleaning and separation. The invention further discloses the molybdenumdisulfide nanosheets with the atomic layer step. The molybdenum disulfide nanosheet is prepared through the method.

Description

technical field [0001] The invention relates to the field of electrocatalytic hydrogen evolution materials, in particular to a molybdenum disulfide nanosheet with atomic layer steps and a preparation method thereof. [0002] technical background [0003] Excessive use of fossil fuels has caused serious environmental problems such as environmental pollution and global warming. Hydrogen is an ideal alternative energy source for fossil fuels. At present, the production of hydrogen by electrolysis of water or photolysis of water is the two main technical routes for producing hydrogen. Among them, direct electrolysis of water requires a large overpotential, resulting in a waste of electric energy and increasing the price of hydrogen. People need to add catalysts to reduce the overpotential of electrolyzed water. [0004] From an electrochemical point of view, water electrolysis includes two half-reactions: hydrogen evolution reaction and oxygen evolution reaction. Molybdenum dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B82Y40/00B82Y30/00B01J27/051
CPCC01G39/06B82Y30/00B82Y40/00B01J27/051C01P2004/04C01P2004/64B01J35/33
Inventor 王宗鹏申士杰林志萍钟文武
Owner TAIZHOU UNIV
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