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

A transition metal, organic framework technology, applied in the field of preparation of transition metal-doped nickel-based metal-organic framework three-dimensional electrode materials, can solve the problems of destroying the original structure of MOF materials, agglomeration of metal nodes, loss of organic ligands, etc. The effect of catalytic reaction resistance, reducing overpotential, increasing conductivity

Active Publication Date: 2021-03-02
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 of transition metal doped nickel-based metal organic framework three-dimensional electrode material, product and application thereof
  • Preparation method of transition metal doped nickel-based metal organic framework three-dimensional electrode material, product and application thereof
  • Preparation method of transition metal doped nickel-based metal organic framework three-dimensional electrode material, product and application thereof

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 obtained.

[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. The preparation method comprises the following stepsof: (1) preparing a three-dimensional conductive graphite substrate from a graphite flake by an electrochemical stripping method; and (2) putting the material obtained in the step (1) into a mixed solution of a bivalent nickel salt, a doped transition metal salt and terephthalic acid, and carrying out a one-step hydrothermal reaction so as to grow and load a transition metal doped nickel-based metal organic framework nanosheet array on a three-dimensional conductive graphite substrate in situ, thus obtaining the transition metal doped nickel-based metal organic framework three-dimensional electrode material. The invention further provides the transition metal doped nickel-based metal organic framework three-dimensional electrode material obtained through the preparation method and application of the transition metal doped nickel-based metal organic framework three-dimensional electrode material to water electrolysis and oxygen evolution in alkaline electrolyte. The three-dimensional electrode material shows excellent catalytic performance in alkaline electrolyte, has good stability, 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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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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