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A kind of black phosphorus-molybdenum disulfide nano electrocatalyst and its preparation method and application

A technology of molybdenum disulfide and electrocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of high cost, limited precious metal content, and inability to be promoted on a large scale, and achieve good stability and high The effect of catalytic activity

Active Publication Date: 2020-04-03
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Noble metals exhibit excellent catalytic activity. For example, Pt / C is currently the best hydrogen production catalyst for water electrolysis. However, noble metals cannot be widely used due to their limited content and high cost.

Method used

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  • A kind of black phosphorus-molybdenum disulfide nano electrocatalyst and its preparation method and application
  • A kind of black phosphorus-molybdenum disulfide nano electrocatalyst and its preparation method and application
  • A kind of black phosphorus-molybdenum disulfide nano electrocatalyst and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of a kind of black phosphorus-molybdenum disulfide nano electrocatalyst that the present invention also proposes comprises the steps:

[0044] The precursor (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea are dispersed in deionized water to obtain a mixed material, followed by hydrothermal reaction, then cooled to room temperature, ultrasonic stripping, washing, and vacuum drying to obtain molybdenum disulfide nanosheets;

[0045] In an ice-water bath, place the bulk black phosphorus in an organic surfactant for ultrasonic exfoliation, then centrifuge once to remove the unexfoliated black phosphorus, then centrifuge twice, wash the solid material, and dry in vacuum to obtain black phosphorus nanosheets;

[0046] The black phosphorus nanosheets and the molybdenum disulfide nanosheets are evenly dispersed in ethanol to obtain a mixed solution, which is subjected to solvothermal reaction after being uniformly ultrasonicated, and vacuum-dried to obtain a ...

Embodiment 2

[0048] The preparation method of a kind of black phosphorus-molybdenum disulfide nano electrocatalyst that the present invention also proposes comprises the steps:

[0049] The precursor (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea are dispersed in deionized water to obtain a mixed material, and in the mixed material (NH4 ) 6 Mo 7 o 24 4H 2 The concentration of O is 0.025mmol / mL, the concentration of thiourea in the mixed material is 1.0mmol / mL, followed by hydrothermal reaction, the temperature of hydrothermal reaction is 210℃, the time of hydrothermal reaction is 20h, then cooled to room temperature, ultrasonic stripping 2h, centrifuge the material cooled to room temperature, the centrifugation speed is 6000 rpm, the centrifugation time is 7min, the centrifuged product is ultrasonically washed with a polar solvent for 1min, and then continue to centrifuge, centrifuge The rotating speed is 10,000 rpm, and the centrifugation time is 5 minutes, and then the centrifuged produ...

Embodiment 3

[0053] The preparation method of a kind of black phosphorus-molybdenum disulfide nano electrocatalyst that the present invention also proposes comprises the steps:

[0054] The precursor (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea are dispersed in deionized water to obtain a mixed material, and in the mixed material (NH 4 ) 6 Mo 7 o 24 4H 2 The concentration of O is 0.030mmol / mL, the concentration of thiourea in the mixed material is 0.7mmol / mL, followed by hydrothermal reaction, the temperature of hydrothermal reaction is 230℃, the time of hydrothermal reaction is 16h, then cooled to room temperature, ultrasonic stripping 4h, the material cooled to room temperature is subjected to centrifugation, the centrifugation speed is 10000 rpm, the centrifugation time is 5min, the centrifuged product is ultrasonically washed with ethanol for 2min, and then the centrifugation is continued, the centrifugation speed 6000 rpm, the centrifugation time is 7min, and then the centrifuged ...

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Abstract

The invention discloses a black phosphorus-molybdenum disulfide nanometer electro-catalyst. A molybdenum disulfide nano-sheet is loaded on the surface of a black phosphorus nano-sheet. The invention also discloses a preparation method of the black phosphorus-molybdenum disulfide nanometer electro-catalyst. The method comprises the following steps: uniformly dispersing black phosphorus nano-sheet and molybdenum disulfide nano-sheet in ethyl alcohol, thereby acquiring a mixed solution; ultrasonically and uniformly dispersing and then performing solvothermal reaction; performing vacuum drying, thereby acquiring the black phosphorus-molybdenum disulfide nanometer electro-catalyst. The invention also discloses an application of the black phosphorus-molybdenum disulfide nanometer electro-catalyst in electrolytic hydrogenation reaction. According to the invention, under the electron injection effect of the black phosphorus nano-sheet to the molybdenum disulfide nano-sheet, the molybdenum disulfide nano-sheet can enrich electrons; the electro-catalyst has higher electro-catalytic activity in the electrolytic hydrogenation reaction; as a non-noble metal catalyst, the black phosphorus-molybdenum disulfide nanometer electro-catalyst has the advantages of easily acquired raw materials and low cost; and meanwhile, after repeated catalyzing tests, the black phosphorus-molybdenum disulfide nanometer electro-catalyst shows performance and structure stability.

Description

technical field [0001] The invention relates to the technical field of energy catalysis, in particular to a black phosphorus-molybdenum disulfide nanometer electrocatalyst and its preparation method and application. Background technique [0002] The energy crisis and environmental pollution have become increasingly serious, threatening the survival and development of human beings. Hydrogen energy is a very important energy source. Due to its high energy density and environmental friendliness, hydrogen is considered to be an ideal energy carrier for sustainable energy storage and a substitute for fossil fuels. At present, the production of hydrogen depends on the fossil fuel industry, so it also faces many difficulties, such as low purity and high cost of hydrogen. Using electric current to split water to generate hydrogen and oxygen is a very effective hydrogen production method, and the production cost is low, and the hydrogen produced is of high purity. [0003] Hydrogen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19C25B1/04C25B11/06
CPCB01J27/19B01J35/0033B01J35/0073C25B1/04C25B11/04Y02E60/36
Inventor 王传浩曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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