Preparation method for constructing two-dimensional metal-organic frameworks (MOFs) nano-hydrolysis electrocatalyst based on foamy copper and application of two-dimensional MOFs nano-hydrolysis electrocatalyst to water electrolysis for hydrogen evolution

A technology of metal-organic framework and electrocatalyst, which is applied in the direction of electrolysis components, electrolysis process, electrodes, etc., to achieve the effects of simple and controllable preparation process, good electrical conductivity, excellent hydrogen evolution performance and stability

Active Publication Date: 2019-03-26
BEIJING CEI TECH
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Problems solved by technology

[0006] In order to solve the problems existing in the application of MOFs in electrocatalytic hydrogen evolution in the prior art, the present invention provides a preparation method for in-situ construction of two-dimensional metal-organic framework nano-electrocatalytic hydrogen evolution materials based on copper foam as a substrate and using a self-sacrificing template method

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  • Preparation method for constructing two-dimensional metal-organic frameworks (MOFs) nano-hydrolysis electrocatalyst based on foamy copper and application of two-dimensional MOFs nano-hydrolysis electrocatalyst to water electrolysis for hydrogen evolution
  • Preparation method for constructing two-dimensional metal-organic frameworks (MOFs) nano-hydrolysis electrocatalyst based on foamy copper and application of two-dimensional MOFs nano-hydrolysis electrocatalyst to water electrolysis for hydrogen evolution
  • Preparation method for constructing two-dimensional metal-organic frameworks (MOFs) nano-hydrolysis electrocatalyst based on foamy copper and application of two-dimensional MOFs nano-hydrolysis electrocatalyst to water electrolysis for hydrogen evolution

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Embodiment 1

[0032] A method for preparing a two-dimensional metal-organic framework nanometer hydrolysis electrocatalyst using foamed copper as a substrate, comprising the following steps:

[0033] a) Preparation of copper phosphate nanosheets: Cut foamed copper with a thickness of 0.16 mm into blocks with a length and width of 30×20 mm, soak in 1 mol / L HCl and ultrasonically clean for 15 min, then rinse with distilled water and ethanol respectively 3 minutes. Then soak the pretreated copper foam in 2 mL of (NH 4 ) 2 S 2 o 8 (0.1 mol / L) and 2 mL of Na 2 HPO 4(0.4mol / L) in 20 mL aqueous solution, reacted at 20°C for 1 h, took it out, rinsed with deionized water, and dried in vacuum at 50°C for 2 h to obtain a substrate with copper phosphate nanosheets grown on the surface.

[0034] b) Preparation of copper-containing MOFs nanosheets: Dissolve 0.84 g of trimesic acid in 40 mL of ethanol solution (0.10 mol / L) in a polyvinyl fluoride reactor, and grow copper phosphate nanosheets in step...

Embodiment 2

[0037] A method for preparing a two-dimensional metal-organic framework nanometer hydrolysis electrocatalyst using foamed copper as a substrate, comprising the following steps:

[0038] a) Preparation of copper phosphate nanosheets: Cut the foamed copper with a thickness of 0.16 mm into a block with a length and width of 30×20 mm, soak it in 3 mol / L HCl and ultrasonically clean it for 15 min, then wash it with distilled water and ethanol respectively 3 minutes. Then soak the pretreated copper foam in 3 mL of (NH 4 ) 2 S 2 o 8 (0.3 mol / L) and 3 mL of Na 2 HPO 4 (0.6 mol / L) in 20 mL aqueous solution, reacted at 30 °C for 2 h, took it out, rinsed with deionized water, and dried in vacuum at 50 °C for 2 h to obtain a substrate with copper phosphate nanosheets grown on the surface.

[0039] b) Preparation of copper-containing MOFs nanosheets: Dissolve 1.26 g of trimesic acid in 40 mL of ethanol solution (0.15 mol / L) in a polyvinyl fluoride reactor, and grow copper phosphate n...

Embodiment 3

[0042] A method for preparing a two-dimensional metal-organic framework nanometer hydrolysis electrocatalyst using foamed copper as a substrate, comprising the following steps:

[0043] a) Preparation of copper phosphate nanosheets: Cut the foamed copper with a thickness of 0.16 mm into blocks with a length and width of 30×20 mm, immerse them in 5 mol / L HCl and ultrasonically clean them for 15 min, then wash them with distilled water and ethanol respectively 3 minutes. Then soak the pretreated copper foam in 4.5 mL of (NH 4 ) 2 S 2 o 8 (0.6 mol / L) and 4.5 mL of Na 2 HPO 4 (0.7 mol / L) in 20 mL aqueous solution, reacted at 50 °C for 3 h, took it out, rinsed with deionized water, and dried in vacuum at 50 °C for 2 h to obtain a substrate with copper phosphate nanosheets grown on the surface.

[0044] b) Preparation of copper-containing MOFs nanosheets: 1.81 g of 2-aminoterephthalic acid was fully dissolved in 40 mL of methanol solution (0.25 mol / L) in a polyvinyl fluoride r...

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Abstract

The invention belongs to the technical field of electrocatalytic hydrogen evolution material preparation, and relates to a preparation method for constructing a two-dimensional metal-organic frameworks (MOFs) nano-hydrolysis electrocatalyst based on foamy copper. The preparation method comprises the following steps: based on foamy copper, carrying out the in-situ growth of flower-like copper phosphate nanosheets on the surface of foamy copper through a self-sacrificing template method at first; and then, carrying out the in-situ growth of copper-bearing MOFs nanosheets on the surface of foamycopper based on the copper phosphate nanosheets grown on the surface of foamy copper, wherein the copper-bearing MOFs nanosheets are perpendicular to Cu3(PO4)2 nanosheets. The preparation method provided by the invention has the beneficial effects that foamy copper is adopted as a reaction base, has a three-dimensional network macro-porous structure, and is stable in structure, rich in material source and low in price; through the structural design of the base and the adoption of the self-sacrificing template method for the in-situ growth of the MOFs nanosheets, no extra metal sources need tobe added, the preparation process is simple and controllable, and the structure of the catalyst grown on the surface of the base is stable; and the morphology of a composite material is changed by regulating and controlling the reaction time and the reaction temperature, the ultra-thin MOFs nanosheets are formed, and the specific surface area and the active site exposure ratio are high.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrocatalytic hydrogen evolution materials, and relates to electrolytic water catalysts, in particular to a method for preparing a two-dimensional metal-organic framework nanometer hydrolysis electrocatalyst based on copper foam and its application to electrolytic water hydrogen evolution. Background technique [0002] With the continuous development of society, the consumption of fossil fuels is increasing rapidly, which has brought serious environmental pollution problems, making the demand for the construction of new energy systems more and more urgent. Hydrogen energy has the advantages of high combustion calorific value, abundant sources, only water as the combustion product, and no secondary pollution. At present, industrial hydrogen production is mainly through the consumption of fossil fuels to produce hydrogen, but the use of fossil fuels will emit a large amount of greenhouse g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04C25B11/03
CPCC25B1/04C25B11/031C25B11/095Y02E60/36
Inventor 邱凤仙荣坚潘少兵张涛朱瑶许锦超杨冬亚徐吉成
Owner BEIJING CEI TECH
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