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Molybdenum disulfide/carbon black composite hydrogen-evolution electrocatalytic material and preparation method therefor

An electrocatalytic material, molybdenum disulfide technology, applied in the field of electrocatalytic hydrogen evolution, can solve the problems of high production cost of composite hydrogen evolution electrocatalytic materials, low yield of graphene oxide preparation, complicated preparation process, etc., to achieve good electrocatalytic performance, Ease of large-scale synthesis and simple method effects

Inactive Publication Date: 2015-12-30
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a molybdenum disulfide / carbon black composite hydrogen evolution electrocatalytic material and its preparation method to solve the problems of high production cost of composite hydrogen evolution electrocatalytic material, low yield of graphene oxide preparation, complicated preparation process and high energy consumption. question

Method used

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  • Molybdenum disulfide/carbon black composite hydrogen-evolution electrocatalytic material and preparation method therefor

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preparation example Construction

[0029] A kind of preparation method of molybdenum disulfide / carbon black composite hydrogen evolution electrocatalytic material provided by the present invention, the specific steps are as follows:

[0030] In the first step, the improved Hummer method prepares carbon black oxide with low oxidation degree;

[0031] 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; transfer the three-necked flask to an oil bath for heating in an oil bath, and after constant temperature, add Anhydrous sodium nitrate, potassium permanganate, and magnetically stirred for 30 minutes; the mass ratio of the anhydrous sodium nitrate, potassium permanganate, and carbon black is 0.1:0.3:1.

[0032] Add high-purity water into the three-necked flask (the high-purity water is added three times, and then adjust the reaction rate to make the reaction fully), stir; remove the three-neck...

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 100 mg of anhydrous sodium nitrate into the three-necked flask; add 300 mg of potassium permanganate after 5 minutes, control the temperature of the oil bath at 50-55 ° C, and stir for 30 minutes by magnetic force; add 3 ml of high-purity water into the three-necked flask, and re- Add 3ml of high-purity water, add 40ml of high-purity water after 5 minutes, and continue stirring for 15 minutes; remove the three-necked flask from the oil bath, add 140ml of high-purity water, 6ml of hydrogen peroxide solution with a mass concentration of 30...

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 100 mg of anhydrous sodium nitrate into the three-necked flask; add 300 mg of potassium permanganate after 5 minutes, control the temperature of the oil bath at 50-55 ° C, and stir for 30 minutes by magnetic force; add 3 ml of high-purity water into the three-necked flask, and re- Add 3ml of high-purity water, add 40ml of high-purity water after 5 minutes, and continue stirring for 15 minutes; remove the three-necked flask from the oil bath, add 140ml of high-purity water, 6ml of hydrogen peroxide solution with a mass concentration of 30...

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Abstract

The invention relates to a molybdenum disulfide / carbon black composite hydrogen-evolution electrocatalytic material and a preparation method therefor and belongs to the field of electrocatalytic hydrogen evolution. According to the preparation method, firstly, a carbon black oxide with low degree of oxidation is prepared by adopting an improved Hummer method; and then, the molybdenum disulfide / carbon black composite hydrogen-evolution electrocatalytic material is prepared through one-step solvothermal reaction at the temperature of 220 DEG C in a manner of taking sodium molybdate crystals as a molybdenum source, taking sulfourea as a sulfur source and taking dimethylformamide as a solvent. According to the method provided by the invention, the carbon black oxide with low degree of oxidation is simple in preparation process and high in yield; the molybdenum disulfide / carbon black composite hydrogen-evolution electrocatalytic material is prepared by adopting a simple, convenient and mild one-step solvothermal method, the cost is low, the repeatability is high, and large-scale synthesis is facilitated. When the molybdenum disulfide / carbon black composite hydrogen-evolution electrocatalytic material is applied to electrocatalytic hydrogen evolution reaction, excellent catalysis performance is shown, the reduced current density reaches 25.0mA / cm<2> when tested overpotential is 200mV, and the reduced current density reaches 36.2mA / cm<2> when tested overpotential is 226mV; the molybdenum disulfide / carbon black composite hydrogen-evolution electrocatalytic material has good electrocatalytic stability.

Description

technical field [0001] The invention belongs to the field of electrocatalytic hydrogen evolution, and in particular relates to a molybdenum disulfide / 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 recogn...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/12C25B1/04B01J27/051
CPCY02E60/36
Inventor 刁鹏薛宁
Owner BEIHANG UNIV
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