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Preparation method of vanadium doping molybdenum disulfide nanoflower with defects and electrocatalysis application thereof

A molybdenum disulfide, nanoflower technology, applied in the direction of molybdenum sulfide, nanotechnology, electrodes, etc.

Inactive Publication Date: 2018-11-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement of catalytic activity faces great challenges due to its inherent low electrical conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1: Take a 50 mL hydrothermal reaction kettle for laboratory use. The hydrothermal reaction kettle has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of deionized water and add it to a 50 mL polytetrafluoroethylene liner, add molybdenum trioxide (0.5760 g, 4.0 mmol) and potassium thiocyanate (1.9436 g, 20 mmol) sequentially under stirring, and heat the autoclave After sealing, place in an oven at 180 °C for 30 h. After natural cooling, deionized water and ethanol were used to centrifugally wash and dry in vacuum to obtain black molybdenum disulfide nanopowder with defects.

[0019] Step 2: Take a 50 mL hydrothermal reaction kettle for laboratory use. The hydrothermal reaction kettle has a stainless steel shell and a polytetrafluoroethylene liner. Add 40 mL of deionized water into a 50 mL polytetrafluoroethylene liner, add vanadium trichloride (0.1573 g, 1.0 mmol) and defective molybdenum disulfide (1.9208 g, 12 mmol) in turn under stirring,...

Embodiment 2

[0028] Step 1: Take a 50 mL hydrothermal reaction kettle for laboratory use. The hydrothermal reaction kettle has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of deionized water and add it to a 50 mL polytetrafluoroethylene liner, add ammonium molybdate (0.7840 g, 4.0 mmol) and thioacetamide (2.4042 g, 32 mmol) in turn under stirring, and heat the autoclave After sealing, place it in an oven at 190°C for 26 hours. After natural cooling, deionized water and ethanol were used to centrifugally wash and dry in vacuum to obtain black molybdenum disulfide nanopowder with defects.

[0029] Step 2: Take a 50 mL hydrothermal reaction kettle for laboratory use. The hydrothermal reaction kettle has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of deionized water and add it to a 50 mL polytetrafluoroethylene liner, add ammonium metavanate (0.1404 g, 1.2 mmol) and defective molybdenum disulfide (2.4011 g, 15 mmol) in turn under stirring...

Embodiment 3

[0038] Step 1: Take a 50 mL hydrothermal reaction kettle for laboratory use. The hydrothermal reaction kettle has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of deionized water and add it to a 50 mL polytetrafluoroethylene liner, add sodium molybdate (1.2098 g, 5.0 mmol) and thiourea (3.8060 g, 50 mmol) in sequence under stirring, and seal the hydrothermal autoclave Incubate in an oven at 200 °C for 24 h. After natural cooling, deionized water and ethanol were used to centrifugally wash and dry in vacuum to obtain black molybdenum disulfide nanopowder with defects.

[0039] Step 2: Take a 50 mL hydrothermal reaction kettle for laboratory use. The hydrothermal reaction kettle has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of deionized water and add it to a 50 mL polytetrafluoroethylene liner, add vanadium pentoxide (0.3640 g, 2.0 mmol) and defected molybdenum disulfide (2.8813 g, 18 mmol) in turn under stirring, and cont...

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Abstract

The invention provides a preparation method of vanadium doping molybdenum disulfide nanoflower with defects and electrocatalysis application thereof. Firstly, a molybdenum and sulfur pre-reaction solution is prepared, and the reaction solution is heated to synthesize defective molybdenum disulfide nano-powder; then hydrothermal reaction is carried out on the defective molybdenum disulfide nano-powder and vanadium source compound to synthesize vanadium doping molybdenum disulfide spherical nano-powder; under the protection of inert gases, annealing treatment is carried out to obtain vanadium doping molybdenum disulfide nanoflower-shaped nano-powder. Vanadium doping molybdenum disulfide with defects is applied to electrocatalysis hydrogen generation reaction (HER), the catalytic performanceis excellent, the overpotential is as low as -0.160V (relative standard hydrogen electrode), and the Tafel slope is as low as 46mV / dec.

Description

technical field [0001] The invention relates to the field of preparation and application of inorganic nanopowder, in particular to a method for preparing defective vanadium-doped molybdenum disulfide nanoflowers based on a hydrothermal method and its application in electrocatalytic water splitting. Background technique [0002] The finiteness of fossil fuels and the polluting gases and particles released during their consumption are major issues facing the sustainable development of the world today. With the enhancement of people's awareness of environmental protection, the development of clean, efficient and renewable new energy has become the current focus of research. Due to the intermittent, unstable, and regional shortcomings of green energy such as solar energy, ocean energy, and wind energy, green energy cannot be widely used on a large scale. Hydrogen energy has the advantages of high energy density, clean and renewable, and stable and continuous. received widesprea...

Claims

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Application Information

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IPC IPC(8): C01G39/06C25B11/06C25B1/04B82Y40/00
CPCB82Y40/00C01G39/06C25B1/04C25B11/091Y02E60/36
Inventor 孙旭郭成英高令峰匡轩张勇魏琴
Owner UNIV OF JINAN
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