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Molybdenum doped vanadium disulfide micron flower material and preparation method and application thereof

A technology of vanadium disulfide and micron flowers, applied in the field of electrocatalytic materials, can solve the problem of low electrocatalytic hydrogen evolution activity, achieve high electrocatalytic hydrogen evolution activity, good catalytic activity, and improve electrocatalytic hydrogen evolution activity

Active Publication Date: 2019-06-28
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the low electrocatalytic hydrogen evolution activity of existing hydrothermally synthesized vanadium disulfide materials, the first purpose of the present invention is to provide a molybdenum-doped vanadium disulfide micron flower material with excellent electrocatalytic hydrogen evolution activity

Method used

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  • Molybdenum doped vanadium disulfide micron flower material and preparation method and application thereof
  • Molybdenum doped vanadium disulfide micron flower material and preparation method and application thereof
  • Molybdenum doped vanadium disulfide micron flower material and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 0.2106g of ammonium metavanadate, 2mL of ammonia water, and 0.0392g of ammonium molybdate, add them to 35mL of deionized water, and stir magnetically at a stirring speed of 200r / min to dissolve them into a transparent solution; then weigh 1.5026g Add thioacetamide to the above clear solution, and continue stirring to completely dissolve it into a light yellow solution. Pour the above light yellow solution into a polytetrafluoroethylene liner and seal it, then put the polytetrafluoroethylene liner into a stainless steel reaction kettle and tighten it, and then place it in an oven at 160°C for 24 hours. After naturally cooling to room temperature, the obtained product was washed successively with absolute ethanol and deoxygenated deionized water; then it was frozen in a refrigerator for 12 hours, and then placed in a freeze dryer at -50°C for 30 hours in vacuum to obtain molybdenum doped Heterogeneous vanadium disulfide micron flower material.

[0036]Use X-ray dif...

Embodiment 2

[0039] Weigh 0.1989g of ammonium metavanadate, 2mL of ammonia water, and 0.0588g of ammonium molybdate, add them to 35mL of deionized water successively, and perform magnetic stirring at a stirring speed of 200r / min to dissolve them into a transparent solution; then weigh 1.5026g Add thioacetamide to the above clear solution, and continue stirring to completely dissolve it into a light yellow solution. Pour the above light yellow solution into a polytetrafluoroethylene liner and seal it, then put the polytetrafluoroethylene liner into a stainless steel reaction kettle and tighten it, and then place it in an oven at 160°C for 24 hours. After naturally cooling to room temperature, the obtained product was washed successively with absolute ethanol and deoxygenated deionized water; then it was frozen in a refrigerator for 12 hours, and then placed in a freeze dryer at -50°C for 30 hours in vacuum to obtain molybdenum doped Heterogeneous vanadium disulfide micron flower material. ...

Embodiment 3

[0043] Weigh 0.2223g of ammonium metavanadate, 2mL of ammonia water, and 0.0196g of ammonium molybdate, add them to 35mL of deionized water successively, and perform magnetic stirring at a stirring speed of 200r / min to dissolve them into a transparent solution; then weigh 1.5026g Add thioacetamide to the above clear solution, and continue stirring to completely dissolve it into a light yellow solution. Pour the above light yellow solution into a polytetrafluoroethylene liner and seal it, then put the polytetrafluoroethylene liner into a stainless steel reaction kettle and tighten it, and then place it in an oven at 160°C for 24 hours. After naturally cooling to room temperature, the obtained product was washed successively with absolute ethanol and oxygen-depleted deionized water; then it was placed in a vacuum drying oven at 60° C. for 24 hours in vacuum to obtain molybdenum-doped vanadium disulfide micron flower material.

[0044] Use XRD and Raman to characterize the struct...

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Abstract

The invention discloses a molybdenum doped vanadium disulfide micron flower material and a preparation method and application thereof. The molybdenum doped vanadium disulfide micro flower material iscomposed of molybdenum doped vanadium disulfide nanosheets by self-assembly. The preparation method comprises the steps of adding a vanadium source, a molybdenum source and ammonia water to water, stirring until being transparent, adding a sulfur source, and stirring to obtain a mixture; making the mixture be further subjected to an one-step hydrothermal reaction, and washing and drying a reactionproduct to obtain the molybdenum doped vanadium disulfide micron flower material; the preparation method has the advantages of simple process, low cost, high yield, mild condition, simple required equipment and environmentally friendly performance, and is capable of mass production. The application of the molybdenum doped vanadium disulfide micron flower material in an electrocatalytic hydrogen evolution reaction shows the excellent catalytic activity, the overpotential is as low as 0.243V (relative to a standard hydrogen electrode), and the Tafel slope is as low as 52.6mV / Dec.

Description

technical field [0001] The invention relates to an electrocatalytic material, in particular to a molybdenum-doped vanadium disulfide micron flower material, and also relates to its preparation method and application in electrocatalytic hydrogen evolution reaction, belonging to the technical field of electrocatalytic material preparation. Background technique [0002] At present, the excessive consumption of fossil fuels has caused a series of extremely serious environmental problems such as global warming. The development of clean and efficient renewable energy is the direction of energy development in the future. Among many energy carriers, hydrogen energy is considered to be a green and efficient energy carrier for building future energy infrastructure due to its high energy density and clean and renewable advantages. As a clean, efficient, safe and easy-to-operate hydrogen production method, electrocatalytic water splitting stands out among many hydrogen production metho...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/00B01J35/02B01J37/10C25B1/02C25B11/06
CPCY02E60/36
Inventor 郑学军何文远彭金峰王银民
Owner XIANGTAN UNIV
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