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Molybdenum diselenide/carbon black composite hydrogen evolution electro-catalysis material and preparation method thereof

An electrocatalytic material, the technology of molybdenum diselenide, which is applied in the field of electrocatalytic hydrogen evolution, can solve the problems of low yield, complicated preparation process and high production cost of graphene oxide, and achieve good electrocatalytic performance, simple oxidation process and low price. cheap effect

Inactive Publication Date: 2015-12-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a molybdenum diselenide / carbon black composite hydrogen evolution electrocatalytic material and its preparation method to solve the problems of high production cost, low graphene oxide production yield, complicated preparation process, The problem of high energy consumption

Method used

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  • Molybdenum diselenide/carbon black composite hydrogen evolution electro-catalysis material and preparation method thereof
  • Molybdenum diselenide/carbon black composite hydrogen evolution electro-catalysis material and preparation method thereof

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preparation example Construction

[0031] A kind of preparation method of molybdenum diselenide / carbon black composite hydrogen evolution electrocatalytic material provided by the present invention, the specific steps are as follows:

[0032] In the first step, the improved Hummer method prepares carbon black oxide with low oxidation degree;

[0033] Weigh carbon black, place it in a three-necked flask, add concentrated sulfuric acid with a mass concentration of 98%, and stir magnetically for 24 hours at room temperature; Sodium nitrate in water, potassium permanganate, and magnetically stirred for 30 minutes; the mass ratio between the anhydrous sodium nitrate, potassium permanganate and carbon black satisfies 0.1:0.3:1. Add high-purity water into the three-necked flask (preferably add high-purity water three times, so that the reaction rate can be fully carried out in order to control the reaction rate), stir; remove the three-necked flask from the oil bath, add high-purity water and hydrogen peroxide solutio...

Embodiment 1

[0040] In the first step, the improved Hummer method prepares carbon black oxide with low oxidation degree;

[0041] Weigh 1.0g of carbon black into a 250ml three-necked flask, add 23ml of concentrated sulfuric acid with a mass concentration of 98% to the three-necked flask, and stir magnetically for 24 hours at room temperature; transfer the three-necked flask to an oil bath at 50-55°C for heating in an oil bath After constant temperature, add 100mg of anhydrous sodium nitrate into the three-necked flask; 5min later, add 300mg potassium permanganate in portions, and stir magnetically for 30min; add 3ml of high-purity water, add 3ml of high-purity water after 5min, add 40ml of high-purity water after 5min, and continue stirring for 15min; Remove the three-necked flask from the oil bath, add 140ml of high-purity water and 6ml of 30% hydrogen peroxide solution in sequence, stir for 5 minutes and cool to room temperature; transfer the solution in the three-necked flask to six 50ml...

Embodiment 2

[0054] In the first step, the improved Hummer method prepares carbon black oxide with low oxidation degree;

[0055] Weigh 1.0g of carbon black into a 250ml three-necked flask, add 23ml of concentrated sulfuric acid with a mass concentration of 98% to the three-necked flask, and stir magnetically for 24 hours at room temperature; transfer the three-necked flask to an oil bath at 50-55°C for heating in an oil bath After constant temperature, add 100mg of anhydrous sodium nitrate into the three-necked flask; 5min later, add 300mg potassium permanganate in portions, and stir magnetically for 30min; add 3ml of high-purity water, add 3ml of high-purity water after 5min, add 40ml of high-purity water after 5min, and continue stirring for 15min; Remove the three-necked flask from the oil bath, add 140ml of high-purity water and 6ml of 30% hydrogen peroxide solution in sequence, stir for 5 minutes and cool to room temperature; transfer the solution in the three-necked flask to six 50ml...

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Abstract

The invention relates to a molybdenum diselenide / carbon black composite hydrogen evolution electro-catalysis material and a preparation method thereof and belongs to the field of electro-catalysis hydrogen evolution. According to the preparation method, a carbon black oxide with low oxidation degree is obtained by an improved Hummer method; a sodium molybdate crystal and Se powder are used as a molybdenum source and a selenium source; hydrazine hydrate is used as an Se powder dispersion solvent and a reducing agent; DMF is used as a solvent; the molybdenum diselenide / carbon black composite hydrogen evolution electro-catalysis material can be prepared by one-step solvent thermal reaction at 200 DEG C. The preparation method of the carbon black oxide with low oxidation degree is simple in process and high in yield; the molybdenum diselenide / carbon black composite hydrogen evolution electro-catalysis material can be prepared by a simple and mild one-step solvothermal method; the molybdenum diselenide / carbon black composite hydrogen evolution electro-catalysis material is low in cost and high in repeatability; the large-scale synthesis is liable to implement; when the molybdenum diselenide / carbon black composite hydrogen evolution electro-catalysis material is applied to electro-catalysis hydrogen evolution reaction, the molybdenum diselenide / carbon black composite hydrogen evolution electro-catalysis material shows excellent electro-catalytic property.

Description

technical field [0001] The invention belongs to the field of electrocatalytic hydrogen evolution, and in particular relates to a molybdenum diselenide / carbon black composite hydrogen evolution electrocatalytic material and a preparation method thereof. Background technique [0002] With the continuous development of the economy, the demand for energy is increasing day by day, which has caused the increasingly intensified contradiction between supply and demand of energy worldwide. In my country, the current energy consumption mode is still dominated by the use of fossil fuels; while a large amount of non-renewable fossil energy is consumed, it has also caused serious environmental pollution problems. Searching for new, green and renewable energy is an inevitable choice to realize the sustainable development of energy, economy and ecology in our country. Renewable energy includes solar energy, wind energy, biomass energy, hydrogen energy, etc. Among them, hydrogen is a recog...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/12C25B1/04B01J27/057
CPCY02E60/36
Inventor 刁鹏薛宁
Owner BEIHANG UNIV
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