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Preparation method of molybdenum disulfide nanosheet @ cobalt sulfide nanoneedle in-situ array electrode

An array electrode, molybdenum disulfide technology, applied in the direction of cobalt sulfide, molybdenum sulfide, chemical instruments and methods, etc., can solve the problems of complicated preparation and so on

Active Publication Date: 2018-08-14
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although, these composites improve the MoS 2 HER performance in alkali, but its performance still needs to be further improved, and these samples are powders that require a later film-making process, and the process is more complicated than in-situ preparation

Method used

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  • Preparation method of molybdenum disulfide nanosheet @ cobalt sulfide nanoneedle in-situ array electrode
  • Preparation method of molybdenum disulfide nanosheet @ cobalt sulfide nanoneedle in-situ array electrode
  • Preparation method of molybdenum disulfide nanosheet @ cobalt sulfide nanoneedle in-situ array electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The carbon paper substrate on which the cobalt tetroxide array was grown was reacted in an Ar+S atmosphere at 600° C. for 1 h, cooled naturally and then taken out for use. Dissolve molybdenum chloride in ethanol solution at room temperature, stir to dissolve, and obtain 450 mM molybdenum chloride ethanol solution. Soak the carbon paper substrate with the cobalt sulfide array in the molybdenum chloride solution, take it out and dry it on a hot table at 80°C for 10 min. Put the coated substrate into the tube furnace, ventilate Ar gas to vacuumize repeatedly three times to discharge the residual air in the tube furnace, and then ventilate Ar gas with a flow rate of 1 SCCM. 1 g of sulfur powder is placed on the upper part of the tube furnace. The temperature in the tube furnace rises, the sulfur powder evaporates to form sulfur vapor, and reacts at 600°C for 30 minutes in an Ar+S atmosphere, and takes it out after natural cooling. Among them, Co 3 o 4 The array adopts th...

Embodiment 2

[0030] The carbon paper substrate on which the cobalt tetroxide array was grown was reacted in an Ar+S atmosphere at 500° C. for 1 h, cooled naturally and then taken out for use. Dissolve molybdenum chloride in ethanol solution at room temperature, stir to dissolve, and obtain 200 mM molybdenum chloride ethanol solution. Soak the carbon paper substrate with the cobalt sulfide array in the molybdenum chloride solution, take it out and dry it on a hot table at 80°C for 10 min. Put the coated substrate into the tube furnace, ventilate Ar gas to vacuumize repeatedly three times to discharge the residual air in the tube furnace, and then ventilate Ar gas with a flow rate of 1 SCCM. The temperature in the tube furnace rises, the sulfur powder evaporates to form sulfur vapor, and reacts at 800°C for 30 minutes in an Ar+S atmosphere, and takes it out after natural cooling. Figure 5 (a) SEM image and (b) linear voltammetry scan image in 1M KOH of the molybdenum disulfide nanosheet@co...

Embodiment 3

[0032] The carbon paper substrate on which the cobalt tetroxide array was grown was reacted in an Ar+S atmosphere at 500° C. for 1 h, cooled naturally and then taken out for use. Dissolve molybdenum chloride in ethanol solution at room temperature, stir to dissolve, and obtain 330 mM molybdenum chloride ethanol solution. Soak the carbon paper substrate with the cobalt sulfide array in the molybdenum chloride solution, take it out and dry it on a hot table at 80°C for 10 min. Put the coated substrate into the tube furnace, ventilate Ar gas to vacuumize repeatedly three times to discharge the residual air in the tube furnace, and then ventilate Ar gas with a flow rate of 1 SCCM. The temperature in the tube furnace rises, the sulfur powder evaporates to form sulfur vapor, and reacts at 800°C for 30 minutes in an Ar+S atmosphere, and takes it out after natural cooling. Figure 6 (a) SEM image and (b) linear voltammetry scan image in 1M KOH of the molybdenum disulfide nanosheet@co...

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Abstract

The invention provides a preparation method of a molybdenum disulfide nanosheet @ cobalt sulfide nanoneedle in-situ array electrode. The preparation method comprises the steps of conducting sulfuration on a substrate where an cobaltosic oxide array grows in Ar+S atmosphere or N2+S atmosphere the first time, so that an cobalt sulfide nanoneedle array electrode is obtained; dissolving molybdenum chloride into volatile nonaqueous solvent, coating the surface of the cobalt sulfide nanoneedle array electrode with an obtained solution, and drying the cobalt sulfide nanoneedle array electrode for use; and then, putting a sample in the Ar+S atmosphere or the N2+S atmosphere, conducting sulfuration the second time, conducting furnace cooling, and taking the sample out, so that the molybdenum disulfide nanosheet @ cobalt sulfide nanoneedle in-situ array electrode is obtained.

Description

technical field [0001] The invention relates to an in-situ composite electrode and its preparation, and belongs to the field of energy storage and conversion materials and devices. Background technique [0002] Molybdenum disulfide is a new type of two-dimensional layered transition metal sulfide similar to graphite. The three atomic layers of S-Mo-S are connected by covalent bonds in the layer, and the S-Mo-S layers are bonded by van der Waals bonds. . Studies have shown that the electron transport in the molybdenum disulfide S-Mo-S layer is faster, but the electron transport in the interlayer, that is, the c-axis direction of the crystal is difficult, which is only about one thousandth of that in the layer. Studies also show that the active sites of molybdenum disulfide are located at the edge of the layer, and it has excellent hydrogen evolution reaction (hydrogen evolution reaction, HER) performance in acidic solution. Therefore, the preparation of molybdenum disulfide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04C01G51/00C01G39/06B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01G39/06C01G51/30C01P2002/72C01P2004/03C25B1/04C25B11/04Y02E60/36
Inventor 黄妞丁玉岳闫术芳孙小华孙盼盼
Owner CHINA THREE GORGES UNIV
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