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Preparation and application of hierarchical porous copper phosphide/carbon hydrolysis electrocatalysts derived from copper-containing metal-organic frameworks

An organic framework, hierarchical porous technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of large size, cumbersome and complicated material preparation process, low product yield, etc., achieve uniform distribution of active centers, improve catalytic performance, The effect of high catalyst yield

Active Publication Date: 2022-01-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently synthesized MOFs precursor materials still have the problem of large size.
Although there are studies to reduce the dimensionality and size by subsequent top-down exfoliation of MOFs, the material preparation process is cumbersome and the product yield is low.

Method used

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  • Preparation and application of hierarchical porous copper phosphide/carbon hydrolysis electrocatalysts derived from copper-containing metal-organic frameworks
  • Preparation and application of hierarchical porous copper phosphide/carbon hydrolysis electrocatalysts derived from copper-containing metal-organic frameworks
  • Preparation and application of hierarchical porous copper phosphide/carbon hydrolysis electrocatalysts derived from copper-containing metal-organic frameworks

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Hierarchically porous copper phosphide / carbon (Cu 3 P@C) A method for preparing an electrolytic water catalyst, comprising the following steps:

[0031] a) Preparation of sea urchin-like Cu-MOF: In a three-neck flask, 5 mg of Cu with a side length of 300-600 nm 2 O cubes were dispersed in 10 mL of N,N-dimethylformamide (DMF) solvent (0.5 mg / mL) and magnetically stirred to form solution A. 0.021 g of trimesic acid was fully dissolved in 10 mL of DMF solvent (0.01 mol / L) to form solution B. Add solution B to solution A under magnetic stirring, and react at 25°C for 5 min. Then the stirring was stopped, and the solution was aged for 30 min. Cool, centrifuge at 8000 rpm for 5 min, wash with deionized water and ethanol, and dry overnight at 60°C under vacuum to obtain the Cu-MOF precursor.

[0032] b) Cu 3 P@C catalyst material preparation: 50 mg of Cu-MOF precursor and 1000 mg of NaH 2 PO 2 Place them at a distance of 2-5 cm, and in an argon or nitrogen atmosphere, r...

Embodiment 2

[0035] Hierarchically porous copper phosphide / carbon (Cu 3 P@C) A method for preparing an electrolytic water catalyst, comprising the following steps:

[0036] a) Preparation of sea urchin-like Cu-MOF: In a three-necked flask, 8 mg of Cu with a side length of 300-600 nm 2 O cubes were dispersed in 10 mL of N,N-dimethylformamide (DMF) solvent (0.8 mg / mL) and magnetically stirred to form solution A. 0.105 g of trimesic acid was fully dissolved in 10 mL of DMF solvent (0.05 mol / L) to form solution B. Add solution B to solution A under magnetic stirring, and react at 60°C for 20 min. Then the stirring was stopped, and the solution was aged for 90 min. Cool, centrifuge at 8000 rpm for 5 min, wash with deionized water and ethanol, and dry overnight at 60°C under vacuum to obtain the Cu-MOF precursor.

[0037] b) Cu 3 Preparation of P@C catalyst material: 50 mg of Cu-MOF precursor and 500 mg of NaH 2 PO 2 Place them at a distance of 2-5 cm, and in an argon or nitrogen atmosphe...

Embodiment 3

[0040] Hierarchically porous copper phosphide / carbon (Cu 3 P@C) A method for preparing an electrolytic water catalyst, comprising the following steps:

[0041] a) Preparation of sea urchin-like Cu-MOF: In a three-necked flask, 12 mg of Cu with a side length of 300-600 nm 2 O cubes were dispersed in 10 mL of N,N-dimethylformamide (DMF) solvent (1.2 mg / mL) and magnetically stirred to form solution A. 0.83 g of terephthalic acid was fully dissolved in 10 mL of DMF solvent (0.5 mol / L) to form solution B. Add solution B to solution A under magnetic stirring, and react at 90°C for 40 min. Then the stirring was stopped, and the solution was aged for 120 min. Cool, centrifuge at 8000 rpm for 5 min, wash with deionized water and ethanol, and dry overnight at 60°C under vacuum to obtain the Cu-MOF precursor.

[0042] b) Cu 3 Preparation of P@C catalyst material: 50 mg of Cu-MOF precursor and 400 mg of NaH 2 PO 2 Place them at a distance of 2-5 cm, and in an argon or nitrogen atmo...

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Abstract

The invention belongs to the technical field of preparation of electrocatalytic hydrogen evolution materials, relates to electrocatalysts for hydrolysis, in particular to a hierarchical porous copper phosphide / carbon (Cu 3 P@C) Preparation method of hydrolysis electrocatalyst and its application in electrolysis of water for hydrogen evolution. The preparation method of the present invention uses cuprous oxide as the Cu source for synthesizing Cu-MOF, uses sodium metaphosphate as the phosphorus source, adopts a bottom-up method to prepare Cu-MOF, and performs in-situ phosphorus on MOFs through high-temperature calcination. forming hierarchically porous Cu 3 P@C catalyst. The method disclosed by the invention has the advantages of simple process, relatively mild conditions, high catalyst yield, low production cost and the like, and can be used for large-scale production. Utilize the Cu prepared by the method disclosed in the invention 3 P@C electrolytic water catalyst has the advantages of porous, high specific surface area, uniform distribution of active centers and high exposure ratio. Using it as a hydrogen evolution electrocatalyst can increase the contact area of ​​the catalytic reaction and improve the catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrocatalytic hydrogen evolution materials, and relates to a hydrolysis electrocatalyst, in particular to a hierarchical porous copper phosphide / carbon (Cu 3 Preparation method and application of P@C) hydrolysis electrocatalyst. Background technique [0002] With the continuous development of society, the burning of fossil fuels has brought serious environmental pollution problems, making people more and more urgent to build a new clean energy system. Hydrogen has the advantages of high combustion calorific value, abundant sources, only water as the combustion product, and no secondary pollution. It is a clean and efficient renewable energy. At present, about 95% of hydrogen production in industry depends on the consumption of fossil fuels, and the production process produces a large amount of greenhouse gases, which brings serious environmental pollution problems. At present, hydrogen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/091C25B1/04
CPCY02E60/36
Inventor 邱凤仙荣坚潘少兵张涛朱瑶杨冬亚房媛媛许锦超
Owner JIANGSU UNIV
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