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Preparation method, product and application of a transition metal-doped nickel-based metal-organic framework three-dimensional electrode material

A transition metal and organic framework technology is applied in the field of preparation of transition metal-doped nickel-based metal-organic framework three-dimensional electrode materials, which can solve the problems of organic ligand loss, metal node agglomeration, and destruction of the original structure of MOF materials Potential, increasing conductivity, reducing the effect of catalytic reaction resistance

Active Publication Date: 2021-11-09
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature pyrolysis process will destroy the original structure of MOF materials, resulting in the loss of organic ligands and the agglomeration of metal nodes, which is not conducive to the use of the inherent advantages of MOF itself for catalysis.

Method used

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  • Preparation method, product and application of a transition metal-doped nickel-based metal-organic framework three-dimensional electrode material
  • Preparation method, product and application of a transition metal-doped nickel-based metal-organic framework three-dimensional electrode material
  • Preparation method, product and application of a transition metal-doped nickel-based metal-organic framework three-dimensional electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of three-dimensional conductive graphite substrate

[0038]The graphite sheet was ultrasonically cleaned with acetone, ethanol and ultrapure water for 20 minutes, dried in an oven at 60°C for 4 hours, and then the graphite sheet was used as the working electrode, the platinum sheet was used as the counter electrode, and the concentrated sulfuric acid was used as the electrolyte. The graphite sheet was electrochemically oxidized and peeled off for 1 min. After the peeling, it was washed with a large amount of ultrapure water and dried in an oven at 60°C for 4 hours to obtain a three-dimensional graphite substrate;

[0039] (2) Preparation of cerium-doped nickel-based metal-organic framework three-dimensional electrode materials

[0040] First measure 16mL of DMF, 1mL of ethanol and 1mL of ultrapure water as a mixed solvent, then weigh 119mg of nickel chloride hexahydrate, 6.5mg of cerium nitrate hexahydrate and 116mg of terephthalic acid, add them to the ...

Embodiment 2

[0053] According to the preparation method in Example 1, the difference is that the amount of cerium nitrate hexahydrate in step (2) is 2 mg, and the cerium-doped nickel-based metal organic framework three-dimensional electrode material is prepared.

[0054] The prepared cerium-doped nickel-based metal-organic framework three-dimensional electrode material exhibited an overpotential of 293 mV in an alkaline electrolyte.

Embodiment 3

[0056] According to the preparation method in Example 1, the difference is that the amount of cerium nitrate hydrate in step (2) is 13 mg, and the cerium-doped nickel-based metal organic framework three-dimensional electrode material is prepared.

[0057] The prepared cerium-doped nickel-based metal-organic framework three-dimensional electrode material exhibits an overpotential of 280 mV in an alkaline electrolyte.

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Abstract

The invention discloses a preparation method of a transition metal-doped nickel-based metal-organic framework three-dimensional electrode material: (1) prepare a three-dimensional conductive graphite substrate by preparing a graphite sheet through an electrochemical stripping method; (2) prepare the three-dimensional conductive graphite substrate obtained in step (1). The obtained material is placed in a mixed solution of divalent nickel salt, doped transition metal salt and terephthalic acid, and undergoes a one-step hydrothermal reaction to in-situ grow loaded transition metal-doped nickel-based metal-organic framework nanoparticles on a three-dimensional conductive graphite substrate. Sheet arrays to obtain transition metal-doped nickel-based metal-organic framework three-dimensional electrode materials. The present invention also provides the transition metal-doped nickel-based metal-organic framework three-dimensional electrode material obtained by the above preparation method and its application in electrolysis of water and oxygen evolution in alkaline electrolyte. The three-dimensional electrode material exhibits excellent catalytic performance and good stability in alkaline electrolyte, and has high practical value and prospect in industrial application.

Description

technical field [0001] The invention belongs to the technical field of energy conversion and environmental catalysis, and specifically relates to a preparation method of a transition metal-doped nickel-based metal-organic framework three-dimensional electrode material and its product and application. Background technique [0002] In order to solve the increasingly serious environmental problems caused by the rapid consumption of fossil fuels, the development of advanced low-cost and high-efficiency energy conversion and storage devices has become a primary development goal, such as fuel cells, metal-air batteries, and water electrolyzers. At the same time, in order to promote the development of clean and renewable energy, the efficiency of these devices needs to be further improved. However, the anodic oxygen evolution reaction has been one of the limiting reactions for the development of these electrochemical energy storage and conversion devices due to its slow kinetics du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/065C25B11/091C25B1/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/04Y02E60/36
Inventor 侯阳程帆鹏杨彬雷乐成
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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