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Preparation method and application of molybdenum selenide-based nano composite material

A nanomaterial, molybdenum selenide-based technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as insufficient molybdenum selenide, and achieve good durability, small mechanical stress and Volume change, effect of multiple reactive active sites

Active Publication Date: 2021-07-02
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the modification schemes and preparation methods proposed by most current research work based on molybdenum selenide can only focus on solving one of the problems, which is far from enough to realize the industrial application of molybdenum selenide

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  • Preparation method and application of molybdenum selenide-based nano composite material
  • Preparation method and application of molybdenum selenide-based nano composite material
  • Preparation method and application of molybdenum selenide-based nano composite material

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preparation example Construction

[0039] The invention provides a method for preparing molybdenum selenide-based nanomaterials, comprising: S) mixing an organic molybdenum source, an organic zinc source, and an organic selenium source in an unsaturated amine solvent, and heating and reacting in a stirring and protective atmosphere , to obtain molybdenum selenide-based nanomaterials.

[0040] The present invention uses organometallic sources as precursors to prepare single-layer porous molybdenum selenide nano-heterostructure composite materials modified by zinc selenide quantum dots through a one-step method. The synthesis path is simple, the operation is convenient, and the compound with high activity and high stability Electrochemical hydrogen evolution catalysts and supercapacitor energy storage hosts optimize the structure of active materials and regulate their internal electronic forms, which have good practical prospects.

[0041] The preparation method provided by the invention enables the energy active...

Embodiment 1～3

[0055] Add 0.1mmol (32.6mg) molybdenum dioxide acetylacetonate, 0.1mmol (26.3mg) zinc acetylacetonate, 0.15mmol (51.0mg) dibenzyldiselenide and 5.0ml oleylamine solution into a 100mL three-necked flask. In an atmosphere of magnetic stirring and inert gas, the device was first heated to 130°C at a constant rate of 10°C / min to remove dissolved oxygen and other low-boiling impurities in the reactants. Afterwards, the device was heated to 290°C, 300°C, and 310°C at a rate of 10°C / min and kept for 30 min. After the reaction, the system was cooled down to room temperature by self-heating, and the obtained sample was dark in color, uniformly dispersed in the reaction medium, washed several times with a mixture of absolute ethanol and toluene, and dried overnight in a vacuum oven at 70°C. In order to remove surface oleylamine, the dried sample was placed in a tube furnace with hydrogen (3%) / argon atmosphere, raised to 400°C at a heating rate of 5°C / min, kept for half an hour, and sele...

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Abstract

The invention provides a preparation method of a molybdenum selenide-based nano material. The method comprises the following steps: S) mixing an organic molybdenum source, an organic zinc source and an organic selenium source in an unsaturated amine solvent, and heating and reacting in a stirring and protective atmosphere to obtain the molybdenum selenide-based nano material. Compared with the prior art, the molybdenum selenide-based nano material is generated through a one-step hydrothermal reflux method, and the molybdenum selenide-based nano material is a zinc selenide quantum dot modified single-layer porous molybdenum selenide nano heterojunction, so that an active material in the nano material has the unique advantage of dual regulation and control of a microstructure and an electronic structure, and excellent reaction activity and cycling stability are shown in the electrochemical process; and the single-layer structure can increase the effective specific surface area of the molybdenum selenide-based nano material as an electrode, and a nano channel formed by the porous framework can provide sufficient transportation or reaction places for electrons / ions and electrolyte, so that the molybdenum selenide-based nano material can be applied to the field of energy conversion and storage as a multifunctional efficient material.

Description

technical field [0001] The invention belongs to the technical field of energy conversion and storage, and in particular relates to a preparation method and application of a molybdenum selenide-based nanometer material. Background technique [0002] With the destruction of the environment and the shortage of fossil resources, the demand of human society for new and environmentally friendly secondary energy is becoming more and more urgent. As a carrier of green energy, hydrogen energy has many advantages such as zero pollution emission, high energy density, and abundant sources, and is considered to be the most potential alternative to fossil energy. [0003] Hydrogen production by electrolysis of water is currently the most efficient and sustainable way to produce hydrogen. However, in the absence of catalysts, this reaction needs to break through a very high potential barrier to be realized. Platinum and other noble metal materials are the most ideal catalysts for electrol...

Claims

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Application Information

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IPC IPC(8): B01J27/057C25B11/091C25B1/04
CPCB01J27/0573C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 杨晴杨静
Owner UNIV OF SCI & TECH OF CHINA