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Electrodeposition method for preparing nickel oxide nanosheet supported nickel-molybdenum oxide quantum dots

A nickel oxide nanosheet and electrodeposition technology, applied in the field of new material technology and chemical synthesis, to achieve excellent bifunctional hydrogen evolution and oxygen evolution activity and stability, strong binding force, and overcoming the effects of easy falling off

Active Publication Date: 2020-05-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zero-dimensional nanomaterials have an ultra-high surface atomic ratio, higher activity and more active sites, but high surface energy promotes their agglomeration. How to obtain uniformly dispersed nanoparticles is the key to limit their practical application as electrode materials.

Method used

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  • Electrodeposition method for preparing nickel oxide nanosheet supported nickel-molybdenum oxide quantum dots
  • Electrodeposition method for preparing nickel oxide nanosheet supported nickel-molybdenum oxide quantum dots
  • Electrodeposition method for preparing nickel oxide nanosheet supported nickel-molybdenum oxide quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Weigh nickel acetate and ammonium molybdate and dissolve in deionized water respectively to obtain 5.078g / L nickel acetate electrolyte solution and 1.248g / L ammonium molybdate electrolyte solution; activate the surface of commercially available carbon cloth, and place the carbon cloth in succession Ultrasonic cleaning in acetone, alcohol, and deionized water for 10 minutes, taking out the carbon cloth and placing it in an acid solution (68wt% concentrated nitric acid and water are prepared according to the volume ratio of 1:3), and pouring it into the reaction of the polytetrafluoroethylene lining place it in an oven, activate it, keep it warm at 90°C for 12 hours, take it out and place it in deionized water for ultrasonic cleaning for 5 minutes, and then dry it in the oven for later use; use the surface-activated carbon cloth as the working electrode, and the carbon rod As a counter electrode, place it in the prepared nickel acetate electrolyte solution, use a workstatio...

Embodiment 2

[0055] Weigh nickel nitrate and ammonium molybdate and dissolve them in deionized water to obtain 1g / L nickel acetate electrolyte solution and 5g / L ammonium molybdate electrolyte solution; activate the surface of the carbon cloth, place the carbon cloth in acetone, alcohol, Ultrasonic cleaning in deionized water for 10 minutes, taking out the carbon cloth and placing it in an acid solution, pouring it into a polytetrafluoroethylene-lined reaction kettle, placing it in an oven, activating it, and keeping it warm at 60°C for 24 hours, After taking it out, put it in deionized water and ultrasonically clean it for 5 minutes, and then dry it in an oven for later use; use the surface-activated carbon cloth as the working electrode, and the carbon rod as the counter electrode, place it in the prepared nickel nitrate electrolyte solution, and use a workstation with a constant voltage of -1V Deposit for 14400s under high pressure to obtain the precursor material; place the deposited pre...

Embodiment 3

[0058] Weigh nickel sulfate and ammonium molybdate and dissolve in deionized water to obtain 20g / L nickel sulfate electrolyte solution and 0.1g / L ammonium molybdate electrolyte solution; activate the surface of carbon cloth, place carbon cloth in acetone, alcohol 1. Ultrasonic cleaning in deionized water for 10 minutes, take out the carbon cloth and place it in an acid solution, pour it into a polytetrafluoroethylene-lined reaction kettle, place it in an oven, activate it, and keep it warm at 120°C for 5 hours After taking it out, put it in deionized water and ultrasonically clean it for 5 minutes, and then dry it in the oven for later use; use the surface-activated carbon cloth as the working electrode, and the carbon rod as the counter electrode, place it in the prepared nickel sulfate electrolyte solution, and use the workstation -6V constant Press and deposit for 600s to obtain the precursor material; place the deposited precursor material in the prepared ammonium molybdate...

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Abstract

The invention discloses an electrodeposition method for preparing nickel oxide nanosheet supported nickel-molybdenum oxide quantum dots. The method comprises the following steps: activating the surface of carbon cloth to obtain pretreated carbon cloth; putting the surface-activated carbon cloth serving as a working electrode and a carbon rod serving as a counter electrode into the prepared nickelsalt electrolyte solution, and performing constant-pressure deposition by using a workstation to obtain a precursor material; putting the deposited precursor material into the prepared molybdenum saltelectrolyte solution, and carrying out constant-pressure deposition by using a workstation; carrying out washing with absolute ethyl alcohol after deposition, and performing drying in a drying oven to obtain the nickel oxide nanosheet supported nickel-molybdenum oxide quantum dots. The nickel oxide nanosheet supported nickel-molybdenum oxide quantum dot material is composed of three phases including nickel oxide, elemental nickel and molybdenum oxide, quantum dots are 2-20 nm in size and are uniformly distributed on nickel oxide nanosheets, and the nickel oxide nanosheets are uniformly distributed on the carbon cloth. According to a technical scheme in the invention, required equipment is simple, operation is convenient, conditions are controllable, repeatability is high, preparation costis low, and the method is suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of new material technology and chemical synthesis technology, and specifically relates to a preparation method for preparing nickel-molybdenum oxide quantum dot material loaded on nickel oxide nanosheets by electrodeposition, and provides a clean, simple process and low-cost preparation method. Background technique [0002] At present, coal, oil and natural gas are gradually depleted as the main energy sources, and a large amount of pollutants are produced at the same time. Environmental pollution and energy shortages have become prominent problems that plague the further development of the social economy. The development of clean and recyclable hydrogen energy is the way to solve these problems one. Hydrogen production technologies include hydrogen production from chemical raw materials, photochemical hydrogen production, thermochemical hydrogen production, and hydrogen production by electrolysis of water, among whic...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04C25D5/12C25D3/12C25D3/54C25D5/54B01J23/883
CPCC25B1/04C25D5/12C25D3/12C25D3/54C25D5/54B01J23/883B01J23/002C25B11/091B01J35/399B01J35/393B01J35/33B01J35/23Y02E60/36
Inventor 韩晓鹏李肖鹏胡文彬邓意达钟澄
Owner TIANJIN UNIV
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