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Preparation method and application of MoS2/transition metal/graphene composite hydrogen dissociation electrode in microbial electrolytic tank

A microbial electrolysis cell and graphene composite technology, which is applied in the fields of chemical power sources and new energy materials, can solve the problems of poor electrical conductivity, slow reaction kinetics, limited hydrogen evolution reaction speed, etc., and achieves a single product, simple preparation process, and energy consumption. low effect

Inactive Publication Date: 2018-06-22
太原学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure MoS 2 The two-dimensional structure severely limits the number of exposed active sites, while MoS 2 Wide bandgap and vertical stacking of multilayer S-Mo-S make MoS 2 Poor electrical conductivity and slow reaction kinetics limit the rate of hydrogen evolution reaction

Method used

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  • Preparation method and application of MoS2/transition metal/graphene composite hydrogen dissociation electrode in microbial electrolytic tank
  • Preparation method and application of MoS2/transition metal/graphene composite hydrogen dissociation electrode in microbial electrolytic tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Weigh 60 mg of graphene oxide and place it in a beaker, add 60 mL of deionized water, and then sonicate for 2 hours to obtain a graphene oxide aqueous solution.

[0043] (2) Weigh 66 mg of ammonium tetrathiomolybdate and add it to the solution obtained in (1), and sonicate for 10 minutes to obtain a uniform solution. Then add 80mgCuCl 2 2H 2 O Ultrasonic 10min. Finally, 2 mL of hydrazine hydrate was added and stirred evenly.

[0044] (3) Transfer the solution obtained in (2) to a 100mL autoclave, and react at 180°C for 12h. Finally, the reactor was cooled to room temperature, and the black precipitate in the reactor was collected, rinsed several times with deionized water and absolute ethanol, and then dried under vacuum at 60°C.

[0045] (4) Weigh 8 mg of MoS prepared in step (3) 2 / transition metal / graphene composite catalyst, placed in absolute ethanol and sonicated for 0.5 h to make a suspension. Draw up the suspension with a pipette gun, and evenly drop it ...

Embodiment 2

[0051] (1) Weigh 60 mg of graphene oxide and place it in a beaker, add 60 mL of deionized water, and then sonicate for 2 hours to obtain a graphene oxide aqueous solution.

[0052] (2) Weigh 132 mg of ammonium tetrathiomolybdate and add it to the solution obtained in (2), and sonicate for 10 minutes to obtain a uniform solution. Then add 50mgCuCl 2 2H 2 O Ultrasonic 10min. Finally, 1 mL of hydrazine hydrate was added and stirred evenly.

[0053] (3) Transfer the solution obtained in (2) to a 100mL autoclave, and react at 190°C for 11h. Finally, the reactor was cooled to room temperature, and the black precipitate in the reactor was collected, rinsed several times with deionized water and absolute ethanol, and then dried under vacuum at 60°C.

[0054] (4) Weigh 16 mg of MoS prepared in step (3) 2 / transition metal / graphene composite catalyst, placed in absolute ethanol and sonicated for 0.5 h to make a suspension. Draw up the suspension with a pipette gun, and evenly drop...

Embodiment 3

[0058] (1) Weigh 40 mg of graphene oxide and place it in a beaker, add 50 mL of deionized water, and then sonicate for 2 hours to obtain a graphene oxide aqueous solution.

[0059] (2) Weigh 44 mg of ammonium tetrathiomolybdate and add it to the solution obtained in (2), and sonicate for 10 minutes to obtain a uniform solution. Then add 40mgZn(NO 3 ) 2 ·6H 2 O Ultrasonic 10min. Finally, 1 mL of hydrazine hydrate was added and stirred evenly.

[0060] (3) Transfer the solution obtained in (2) to a 100mL autoclave, and react at 200°C for 10h. Finally, the reactor was cooled to room temperature, and the black precipitate in the reactor was collected, rinsed several times with deionized water and absolute ethanol, and then dried under vacuum at 60°C.

[0061] (4) Weigh 12 mg of MoS prepared in step (3) 2 / transition metal / graphene composite catalyst, placed in absolute ethanol and sonicated for 0.5 h to make a suspension. Draw up the suspension with a pipette gun, and evenl...

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Abstract

The invention discloses a preparation method and application of an MoS2 / transition metal / graphene composite hydrogen dissociation electrode in a microbial electrolytic tank. The preparation method comprises the following steps: (1) dissolving graphene oxide with deionized water, performing ultrasonic peeling to obtain a graphene oxide solution, then, adding ammonium tetrathiomolybdate, a salt compound of transition metal and a reducing agent in sequence, and dispersing uniformly to obtain a mixed solution; (2) transferring the mixed solution into a reaction kettle, preserving heat for 10 to 12hours at 170 to 200 DEG C, and centrifuging, washing and drying a product to obtain the MoS2 / transition metal / graphene composite hydrogen dissociation catalyst; (3) uniformly loading an electrode material with the MoS2 / transition metal / graphene composite hydrogen dissociation catalyst to obtain the hydrogen dissociation electrode. According to the preparation method and the application of the MoS2 / transition metal / graphene composite hydrogen dissociation electrode in the microbial electrolytic tank, a reaction system is uniform; the production cost is low; the MoS2 / transition metal / graphene composite hydrogen dissociation electrode has good electrochemical performance, has a good catalytic hydrogen production effect, and can achieve double effects of treating pollution and producing energy.

Description

technical field [0001] The invention relates to MoS in a microbial electrolytic cell 2 A preparation method and application of a transition metal / graphene composite hydrogen evolution electrode belong to the field of chemical power sources and new energy materials. Background technique [0002] The gradual depletion of traditional energy sources and serious environmental pollution are two major problems facing the world today. Vigorously developing renewable clean energy has become the most urgent task and topic for people. Hydrogen is a clean, efficient and renewable energy source. However, the traditional hydrogen production technology needs to consume a large amount of fossil fuels or electricity, and the production cost is relatively high. Microbial electrolysis cell (MEC) is a new hydrogen production technology developed in recent years. Under the action of electroactive microorganisms, it uses electrochemical technology to convert the chemical energy of organic matt...

Claims

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Application Information

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IPC IPC(8): C02F3/34H01M8/16C02F103/22C02F103/32
CPCC02F3/34C02F3/348C02F2103/001C02F2103/22C02F2103/32C02F2209/08H01M8/16Y02E60/50
Inventor 代红艳李晓静刘宪杨慧敏宋秀丽
Owner 太原学院
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