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Foamed nickel-based porous NiFe hydrotalcite nanosheet as well as preparation and application thereof

A technology of hydrotalcite and nanosheets, which is applied in the field of nanomaterial preparation and electrocatalysis, which can solve the problems of complex porous structure and lack of porous structure, and achieve excellent catalytic performance, simple operation and high efficiency

Pending Publication Date: 2020-06-05
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the materials constructed by the above methods do not have a porous structure, and some methods of forming a porous structure are more complicated.
[0005] Therefore, how to precisely construct the porous structure of NiFe LDH ultrathin nanosheets in a fast, facile, and green manner and precisely tune the electronic configurations of surface cations remains a great challenge.

Method used

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  • Foamed nickel-based porous NiFe hydrotalcite nanosheet as well as preparation and application thereof
  • Foamed nickel-based porous NiFe hydrotalcite nanosheet as well as preparation and application thereof
  • Foamed nickel-based porous NiFe hydrotalcite nanosheet as well as preparation and application thereof

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Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1: Preparation of foamed nickel-based porous NiFe LDH ultrathin nanosheet material (NiFe LDHMs / NF-200)

[0044] Weigh 0.214g (0.9mmol) of nickel chloride hexahydrate, 0.081g (0.3mmol) of ferric chloride hexahydrate, 0.498g (8.3mmol) of urea and 0.118g (3.2mmol) of ammonium fluoride and dissolve them in 20mL to In deionized water, stir to form a homogeneous solution. Add 200 μL of hydrogen peroxide solution dropwise to the above solution (the concentration of hydrogen peroxide solution is 0.0979 mol / L), and then transfer it to a 50 mL stainless steel reactor with a polytetrafluoroethylene liner, and place the treated nickel foam Immerse in the reaction solution prepared above, seal it and place it in an oven, react at 120°C for 16 hours, cool to room temperature naturally after the reaction, take out the reaction solution and centrifuge it at 10000rpm for 2min, and wash the obtained product with deionized water and anhydrous The porous NiFe LDH ultrathin nano...

Embodiment 2

[0050] Embodiment 2: Preparation of foamed nickel-based porous NiFe LDH ultrathin nanosheet material (NiFe LDHMs / NF-20)

[0051] Weigh 0.214g (0.9mmol) of nickel chloride hexahydrate, 0.081g (0.3mmol) of ferric chloride hexahydrate, 0.498g (8.3mmol) of urea and 0.118g (3.2mmol) of ammonium fluoride and dissolve them in 20mL to In deionized water, stir to form a homogeneous solution. Add 20 μL of hydrogen peroxide solution dropwise to the above solution (the concentration of hydrogen peroxide solution is 0.0979 mol / L), then transfer it to a 50 mL stainless steel reaction kettle with a polytetrafluoroethylene liner, and place the treated nickel foam Immerse in the reaction solution prepared above, seal it and place it in an oven, react at 120°C for 16 hours, cool to room temperature naturally after the reaction, take out the reaction solution and centrifuge it at 10000rpm for 2min, and wash the obtained product with deionized water and anhydrous The porous NiFe LDH ultrathin na...

Embodiment 3

[0052] Embodiment 3: the preparation (NiFe LDHMs / NF-60) of foam nickel-based porous NiFe LDH ultra-thin nanosheet material

[0053] Weigh 0.214g (0.9mmol) of nickel chloride hexahydrate, 0.081g (0.3mmol) of ferric chloride hexahydrate, 0.498g (8.3mmol) of urea and 0.118g (3.2mmol) of ammonium fluoride and dissolve them in 20mL to In deionized water, stir to form a homogeneous solution. Add 60 μL of hydrogen peroxide solution dropwise to the above solution (the concentration of hydrogen peroxide solution is 0.02937 mol / L), and then transfer it to a 50 mL stainless steel reactor with a polytetrafluoroethylene liner, and place the treated nickel foam Immerse in the reaction solution prepared above, seal it and place it in an oven, react at 120°C for 16 hours, cool to room temperature naturally after the reaction, take out the reaction solution and centrifuge it at 10000rpm for 2min, and wash the obtained product with deionized water and anhydrous The porous NiFe LDH ultrathin na...

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Abstract

The invention relates to a foamed nickel-based porous NiFe hydrotalcite nanosheet as well as preparation and application thereof. The invention discloses a preparation method of a foamed nickel-basedporous NiFe hydrotalcite nanosheet. The preparation method comprises the following steps that foamed nickel is immersed into a reaction solution, wherein the reaction solution comprises bivalent nickel salt, trivalent iron salt, urea, ammonium fluoride, hydrogen peroxide and water; then a reaction is conducted at the temperature of 100-120 DEG C under the closed condition, so that the foamed nickel-based porous NiFe hydrotalcite nanosheet is obtained after the reaction is completed.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation and electrocatalysis, in particular to a foamed nickel-based porous NiFe hydrotalcite nanosheet and its preparation and application. Background technique [0002] With the increasing global energy crisis and environmental pollution, efficient water electrolysis catalysts are considered to be an important way to achieve clean and sustainable energy conversion and storage systems and have been intensively studied. However, in the anodic reaction, thermodynamics and slow electrocatalytic hydrogen evolution reaction (OER) kinetics often limit the overall efficiency of the system during electrolysis due to the involvement of four electron transfers and the formation of O–O bonds at high potentials. At present, noble metal oxides (iridium oxide and ruthenium oxide) are the best OER catalysts. Although the catalytic activity is high, the disadvantages of precious metal resources such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/00B01J35/10C25B1/04C25B11/06
CPCB01J37/0018B01J23/755C25B1/04C25B11/051B01J35/33B01J35/647Y02E60/36
Inventor 郎建平赵中胤黄小青倪春燕
Owner SUZHOU UNIV
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