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Fenico oxygenate nanosheets with adjustable metal ratio and its preparation method and application

A technology of compounds and nanosheets, which is applied in the field of nanomaterials and electrochemistry, can solve the problems of high price, large-scale application limitations, and lack of resources, and achieve the effect of low cost, low cost, and sufficient contact area

Active Publication Date: 2020-04-21
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 oxygenate nanosheets with adjustable metal ratio and its preparation method and application
  • Fenico oxygenate nanosheets with adjustable metal ratio and its preparation method and application
  • Fenico oxygenate nanosheets with adjustable metal ratio and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0031] 3) Weigh 40 mg metal organic framework ZIF-67 powder and fully disperse it in 5 ml 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, that is, Fe4Ni6-ZIF nanosheets.

[0034] The present invention Fe x Ni y -The formation process of ZIF nanosheets 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+...

Embodiment 2

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

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

[0041] 3) Weigh 40 mg metal organic framework ZIF-67 powder and fully disperse it in 5 ml 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 then freeze-dried to obtain FeNiCo oxygenate nanosheets with uniform morphology, that is, 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 elemental analysis shows that the molar ratio of metals ...

Embodiment 3

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

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

[0048] 3) Weigh 40 mg metal organic framework ZIF-67 powder and fully disperse it in 5 ml 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, that is, Fe-ZIF nanosheets.

[0051] The Fe-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 metal molar ratio Fe / Ni / Co≈100 / 0 / 0, has a certain electrocata...

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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. The electrolysis of water includes two r...

Claims

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Application Information

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Patent Type & Authority Patents(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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