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FeNiCo oxygenated chemical nanosheet with adjustable metal proportion as well as preparation method and application thereof

A compound and nanosheet technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of high price, limited large-scale application, lack of resources, etc., and achieve the effects of low cost, low cost, and sufficient contact area.

Active Publication Date: 2018-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, the best electrocatalytic oxygen evolution catalyst is RuO 2 , IrO 2 and other noble metal-based compounds, but their scarcity and high price limit their large-scale application

Method used

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  • FeNiCo oxygenated chemical nanosheet with adjustable metal proportion as well as preparation method and application thereof
  • FeNiCo oxygenated chemical nanosheet with adjustable metal proportion as well as preparation method and application thereof
  • FeNiCo oxygenated chemical nanosheet with adjustable metal proportion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) A metal-organic framework ZIF-67 with a particle size of 800 nm was prepared by a static precipitation method;

[0030] 2) Weigh 0.4mmol FeSO 4 ·7H 2 O with 0.6mmol NiSO 4 ·6H 2 O, fully dissolved in 20ml of deionized water to obtain liquid A;

[0031] 3) Weigh 40mg of metal-organic framework ZIF-67 powder, fully disperse it in 5ml of absolute ethanol to obtain liquid B;

[0032] 4) Pour liquid B into liquid A quickly, and stir magnetically at room temperature for 30 minutes;

[0033] 5) The product obtained in step 4) was washed four times with a mixed solution of absolute ethanol / deionized water, and then freeze-dried to obtain FeNiCo oxygenate nanosheets with uniform morphology, namely Fe4Ni6-ZIF nanosheets.

[0034] The formation process of FexNiy-ZIF nanosheet of the present invention is as follows figure 1 Shown: After liquid A and liquid B are mixed, ZIF-67 will dissociate in the solution environment, releasing 2-methylimidazolium ions and Co 2+ , the 2...

Embodiment 2

[0039] 1) A metal-organic framework ZIF-67 with a particle size of 800 nm was prepared by a static precipitation method;

[0040] 2) Weigh 0.6mmol FeSO 4 ·7H 2 O with 0.4mmol NiSO 4 ·6H 2 O, fully dissolved in 20ml of deionized water to obtain liquid A;

[0041] 3) Weigh 40mg of metal-organic framework ZIF-67 powder, fully disperse it in 5ml of absolute ethanol to obtain liquid B;

[0042] 4) Pour liquid B into liquid A quickly, and stir magnetically at room temperature for 30 minutes;

[0043] 5) The product obtained in step 4) was washed four times with a mixed solution of absolute ethanol / deionized water, and freeze-dried to obtain FeNiCo oxygenate nanosheets with uniform morphology, namely Fe6Ni4-ZIF nanosheets.

[0044] The Fe6Ni4-ZIF nano sheet of present embodiment gained, crystallinity is low ( figure 2 It can be seen from the XRD diffraction results), the morphology is uniform ( image 3 c), ICP element analysis shows that the molar ratio of metals is Fe / Ni / Co...

Embodiment 3

[0046] 1) A metal-organic framework ZIF-67 with a particle size of 800 nm was prepared by a static precipitation method;

[0047] 2) Weigh 1.0mmol FeSO 4 ·7H 2 O, fully dissolved in 20ml of deionized water to obtain liquid A;

[0048] 3) Weigh 40mg of metal-organic framework ZIF-67 powder, fully disperse it in 5ml of absolute ethanol to obtain liquid B;

[0049] 4) Pour liquid B into liquid A quickly, and stir magnetically at room temperature for 30 minutes;

[0050] 5) The product obtained in step 4) was washed four times with a mixed solution of absolute ethanol / deionized water, and then freeze-dried to obtain FeNiCo oxygenate nanosheets with uniform morphology, namely Fe-ZIF nanosheets.

[0051] The Fe6Ni4-ZIF nano sheet of present embodiment gained, crystallinity is low ( figure 2 It can be seen from the XRD diffraction results), the morphology is uniform ( image 3 a), ICP elemental analysis shows that the molar ratio of the metal is Fe / Ni / Co≈100 / 0 / 0, which has a ce...

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Abstract

The invention relates to a FeNiCo oxygenated chemical nanosheet with adjustable metal proportion as well as a preparation method and application thereof. The preparation method comprises the followingsteps that S1, a metal organic framework ZIF-67 is prepared by adopting a normal-temperature standing precipitation method; S2, FeSO4*7H2O and NiSO4*6H2O are weighed according to a certain ratio andare fully dissolved in deionized water so as to obtain liquid A, and a proper amount of metal organic framework ZIF-67 powder obtained in the step S1 is taken and and is fully dispersed in absolute ethyl alcohol so as to obtain liquid B; S3, the liquid B is rapidly poured into the liquid A, and stirring is carried out; and S4, a product obtained in the step S3 is washed, and a centrifuged productis subjected to freeze drying so as to obtain the FeNiCo oxygenated chemical nanosheet with uniform morphology. The FeNiCo oxygenated chemical nanosheet as well as the preparation method and application thereof have the beneficial effects that the FeNiCo oxygenated chemical nanosheet serves as an anode for electrocatalytic water decomposition, and the oxygen evolution catalytic performance is excellent; and the material is simple in synthetic process, low in cost, environmentally-friendly and extremely high in repeatability.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a FeNiCo oxygen-containing compound nanosheet with adjustable metal ratio and a preparation method thereof, which can be used as a catalyst material for an oxygen evolution reaction. Background technique [0002] Nowadays, human's demand for fossil energy has increased dramatically, which has led to the depletion of traditional energy materials, and at the same time, people are increasingly concerned about energy crisis, energy security, and environmental pollution caused by the use of fossil energy. Efficient, environmentally friendly, and low-cost production of hydrogen—a safe, clean, and sustainable alternative energy source—will address growing global energy needs. [0003] Hydrogen production by electrolysis of water is one of the important ways for the development of clean and renewable energy. Water electrolysis includes two reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06C01G53/00B82Y40/00
CPCB82Y40/00C01G53/006C01P2002/72C01P2002/82C01P2002/85C01P2004/03C01P2004/04C01P2004/22C01P2006/12C25B1/04C25B11/095Y02E60/36
Inventor 周亮黄文忠麦立强李坚涛
Owner WUHAN UNIV OF TECH
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