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Porous flaky molybdenum phosphide/carbon composite material and preparation method thereof

A composite material, molybdenum phosphide technology, applied in the field of material processing, can solve the problem of low hydrogen evolution catalytic activity, and achieve the effects of high purity, low production cost and wide application

Inactive Publication Date: 2019-11-22
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a porous sheet molybdenum phosphide / carbon composite material and its preparation method, aiming to solve the technical problem of low hydrogen evolution catalytic activity of existing molybdenum phosphide

Method used

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  • Porous flaky molybdenum phosphide/carbon composite material and preparation method thereof
  • Porous flaky molybdenum phosphide/carbon composite material and preparation method thereof
  • Porous flaky molybdenum phosphide/carbon composite material and preparation method thereof

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preparation example Construction

[0024] On the one hand, an embodiment of the present invention provides a method for preparing a porous sheet-like molybdenum phosphide / carbon composite material, comprising the following steps:

[0025] S01: Provide molybdenum source, phosphorus source, carbon source and sodium chloride;

[0026] S02: dissolving the molybdenum source, phosphorus source, carbon source and sodium chloride in an aqueous solvent to obtain a mixed solution;

[0027] S03: drying the mixed solution to obtain a precursor powder;

[0028] S04: Calcining the precursor powder and then cleaning it to obtain a porous flake molybdenum phosphide / carbon composite material.

[0029] The preparation method of the porous flake molybdenum phosphide / carbon composite material provided by the embodiment of the present invention uses molybdenum source, phosphorus source, carbon source and sodium chloride as raw materials, dissolves it in a water solvent to obtain a mixed solution, and passes through Drying treatme...

Embodiment 1

[0043] A kind of preparation method of porous flake molybdenum phosphide / carbon composite material, comprises the following steps:

[0044] (1). Dissolve 100 mg ammonium molybdate tetrahydrate, 100 mg ammonium dihydrogen phosphate, and 1000 mg dicyandiamide in 50 mL deionized water, stir and ultrasonically dissolve until completely dissolved, and continue stirring for about 30 minutes to obtain the first mixed solution;

[0045] (2). Add 3000 mg of sodium chloride to the solution obtained in step (1), stir until completely dissolved, and continue stirring for 3 hours to obtain the second mixed solution;

[0046] (3). Put the second mixed solution into a refrigerator freezer at -30°C and freeze for 24 hours, then place the frozen product in a vacuum freeze dryer, and freeze-dry for 72 hours to obtain a dry solid powder. Grind for 10 minute;

[0047] (4). The dried precursor was calcined in a nitrogen atmosphere at a heating rate of 5°C / min, raised to 900°C, and calcined at a c...

Embodiment 2

[0050] A kind of preparation method of porous flake molybdenum phosphide / carbon composite material, comprises the following steps:

[0051] (1). Dissolve 100 mg ammonium molybdate tetrahydrate, 100 mg ammonium dihydrogen phosphate, and 1000 mg dicyandiamide in 50 mL deionized water, stir and ultrasonically dissolve until completely dissolved, and continue stirring for about 30 minutes to obtain the first mixed solution;

[0052] (2). Add 1000 mg of sodium chloride to the solution obtained in step (1), stir until completely dissolved, and continue stirring for 3 hours to obtain the second mixed solution;

[0053] (3). Put the second mixed solution into a refrigerator freezer at -30°C and freeze for 24 hours, then place the frozen product in a vacuum freeze dryer, and freeze-dry for 72 hours to obtain a dry solid powder. Grind for 10 minute;

[0054] (4). The dried precursor was calcined in a nitrogen atmosphere at a heating rate of 5°C / min, raised to 900°C, and calcined at a c...

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Abstract

The invention belongs to the technical field of material processing, and particularly relates to a porous flaky molybdenum phosphide / carbon composite material and a preparation method thereof. The preparation method comprises the following steps of providing a molybdenum source, a phosphorus source, a carbon source and sodium chloride; dissolving the molybdenum source, the phosphorus source, the carbon source and sodium chloride in a water solvent to obtain a mixed solution; drying the mixed solution to obtain precursor powder; calcining the precursor powder, and then cleaning to obtain the porous flaky molybdenum phosphide / carbon composite material. According to the preparation method disclosed by the invention, the high-purity two-dimensional flaky molybdenum phosphide / carbon composite material can be obtained, the whole preparation process is safe and reliable, the process conditions are simple and easy to control, the production cost is low, and the preparation method is suitable for industrial large-scale production; the obtained porous flaky molybdenum phosphide / carbon composite material has the characteristics of small molybdenum phosphide particle size, high purity and large effective specific surface area, shows good catalytic activity similar to platinum, and can be widely applied to the field of catalysis.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a porous sheet-like molybdenum phosphide / carbon composite material and a preparation method thereof. Background technique [0002] Platinum and other precious metals are widely used in the catalytic process of petrochemical industry, organic synthesis, fuel cell, automobile and electronic industry because of their catalytic effect. On the other hand, the price is very expensive and the application cost is high. Because of this, people have been looking for new catalytic materials that can replace noble metal catalysts such as platinum. [0003] Among the numerous new catalytic materials, molybdenum phosphide (MoP) has attracted widespread interest due to its good chemical and thermodynamic stability, outstanding corrosion resistance, and good electrical conductivity. Especially after molybdenum phosphide exhibits an electronic structure similar to platin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J37/32C25B11/06C25B1/02
CPCB01J27/19B01J37/32C25B1/02C25B11/091B01J35/33
Inventor 冯其张震尧克光李辉王海江
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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