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Nitrogen-doped carbon-coated nanoflower-shaped MoSe2 composite material and preparation and application

A nitrogen-doped carbon and composite material technology, applied in the preparation and application of energy materials, can solve the problems of limited commercial application, high price, poor stability, etc., and achieve high hydrogen evolution catalytic activity, stability and cost The effect of low cost and simple preparation method

Active Publication Date: 2017-05-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a nitrogen-doped Heterocarbon-coated nanoflower-like MoSe 2 Composite material namely nano flower-like MoSe 2 / CN composite material and preparation method of the material

Method used

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  • Nitrogen-doped carbon-coated nanoflower-shaped MoSe2 composite material and preparation and application
  • Nitrogen-doped carbon-coated nanoflower-shaped MoSe2 composite material and preparation and application
  • Nitrogen-doped carbon-coated nanoflower-shaped MoSe2 composite material and preparation and application

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Effect test

Embodiment 1

[0039] A nitrogen-doped carbon-coated nanoflower-like MoSe 2 The preparation method of composite material, comprises the following steps:

[0040] 1) Weigh 0.45g of sodium borohydride and dissolve it in deionized water to prepare a concentration of 0.59mol / L aqueous solution, i.e. sodium borohydride solution;

[0041] 2) Add 2.42g of selenium powder into the sodium borohydride solution obtained in step 1), and stir at 65°C for 0.8h (stirring speed is 20rpm) to obtain a mixed solution;

[0042] 3) Take 3g of ammonium molybdate and dissolve it in deionized water to prepare a concentration of 0.77mol / L aqueous solution, i.e. ammonium molybdate solution;

[0043]4) Add the ammonium molybdate solution in step 3) into the salt solution obtained in step 2), and stir at 60° C. for 1.5 h (stirring speed is 20 rpm) to obtain a mixed solution;

[0044] 5) Add 9 g of ammonium citrate to the mixed solution obtained in step 4), stir at 60°C for 0.6h (stirring speed is 20rpm), put the resu...

Embodiment 2

[0052] A nitrogen-doped carbon-coated nanoflower-like MoSe 2 The preparation method of composite material, comprises the following steps:

[0053] 1) Weigh 0.38g of sodium borohydride and dissolve it in deionized water to prepare a concentration of 0.5mol / L aqueous solution, i.e. sodium borohydride solution;

[0054] 2) Add 1.58g of selenium powder into the sodium borohydride solution obtained in step 1), and stir at 50°C for 0.5h (stirring speed is 40rpm) to obtain a mixed solution;

[0055] 3) Weigh 2.42g of sodium molybdate and dissolve it in deionized water to prepare a 0.5mol / L aqueous solution, i.e. sodium molybdate solution;

[0056] 4) Add the sodium molybdate solution in step 3) into the mixed solution obtained in step 2), and stir at 50° C. for 0.5 h (stirring speed is 40 rpm) to obtain a mixed solution;

[0057] 5) Add 1 g of citric acid into the salt solution obtained in step 4), stir at 50°C for 0.5h (stirring speed is 40rpm), add the obtained mixture into a 50m...

Embodiment 3

[0063] A nitrogen-doped carbon-coated nanoflower-like MoSe 2 The preparation method of composite material, comprises the following steps:

[0064] 1) Weigh 1.51g of sodium borohydride and dissolve it in deionized water, and prepare a concentration of 2mol / L aqueous solution, i.e. sodium borohydride solution;

[0065] 2) Add 6.32g of selenium powder into the sodium borohydride solution obtained in step 1), and stir at 80°C for 2h (stirring speed is 30rpm) to obtain a mixed solution;

[0066] 3) Take by weighing 9.52g potassium molybdate and dissolve it in deionized water, and be prepared with a concentration of 2mol / L aqueous solution, i.e. potassium molybdate solution;

[0067] 4) Add the potassium molybdate solution in step 3) into the mixed solution obtained in step 2), and stir at 80° C. for 2 hours (stirring speed is 30 rpm) to obtain a mixed solution;

[0068] 5) Add 10 g of glucose to the mixed solution obtained in step 4), stir at 80° C. for 1 h (stirring speed is 30 ...

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Abstract

The invention belongs to the field of energy material preparation and application, and discloses a nitrogen-doped carbon-coated nanoflower-shaped MoSe2 composite material and preparation and application. The method comprises the following steps: 1) adding selenium powder into a sodium borohydride solution, mixing, adding a molybdenum source solution, stirring and mixing, further adding an organic carbon source, putting into a high-pressure reaction kettle, performing a heat-preservation reaction, cooling, filtering, washing, drying, and calcining in an inert gas atmosphere, so as to obtain a MoSe2 / C product; 2) dispersing the MoSe2 / C product into water, adding a nitrogen source, performing ultrasonic treatment, performing heating stirring till being evaporated to dryness so as to obtain a precursor; (3) heating the precursor in the inert gas atmosphere, and calcining at 500-700 DEG C, thereby obtaining the nitrogen-doped carbon-coated nanoflower-shaped MoSe2 composite material. The nitrogen-doped carbon-coated nanoflower-shaped MoSe2 composite material is relatively large in specific surface area, good in hydrogen separation catalysis activity and stability, simple in method, wide in raw material source, low in cost and applicable to large-scale production.

Description

technical field [0001] The invention belongs to the field of preparation and application of energy materials, in particular to a nitrogen-doped carbon-coated nano-flower MoSe 2 Composite material and preparation method thereof, the nitrogen-doped carbon-coated nano-flower-like MoSe 2 Composite materials are used in hydrogen evolution (HER) catalysts. Background technique [0002] Energy and the environment are two necessary conditions for sustainable development. However, the energy crisis and environmental pollution problems that the world is facing have become increasingly severe, threatening the survival and development of human beings. With the rapid development of green secondary energy such as solar energy and wind energy, hydrogen production by hydrolysis using green energy such as solar energy and wind energy has become a promising means of comprehensive utilization of green energy. Compared with methanol and other fossil fuels, hydrogen has attracted more and mor...

Claims

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Application Information

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IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCC25B1/04B01J27/24C25B11/057C25B11/091B01J35/40Y02E60/36
Inventor 牛晓君谢贵婷
Owner SOUTH CHINA UNIV OF TECH
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