Fe-doped Ni-MOF nanosheet as well as preparation method and application thereof

A nanosheet, soluble technology, applied in electrodes, electrical components, electrolysis process, etc., can solve the problems of hindering electrocatalytic performance and poor electrical conductivity of MOFs, and achieve the effect of excellent electrocatalytic performance, improved oxygen evolution performance, and simple method.

Active Publication Date: 2021-10-29
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the poor electrical conductivity of MOFs hinders the development of electrocatalytic performance.

Method used

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  • Fe-doped Ni-MOF nanosheet as well as preparation method and application thereof
  • Fe-doped Ni-MOF nanosheet as well as preparation method and application thereof
  • Fe-doped Ni-MOF nanosheet as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of Fe-doped Ni-MOF nanosheets, comprising the following steps:

[0043] S1. Precursor NiCo-LDH nanosheets prepared by hydrothermal method

[0044] S1.1, the Co(NO 3 ) 2 ·6H2 O (0.08g, 0.275mmol), Ni (NO 3 ) 2 ·6H 2 O (0.04g, 0.1375mmol), hexamethylenetetramine (HMT, 0.234g) were dissolved in 12mL of ethylene glycol aqueous solution (the volume ratio of ethylene glycol to deionized water was 1:5), and stirred until a uniform solution to obtain solution A;

[0045] S1.2. Place nickel foam in hydrochloric acid solution and ultrasonically clean it for 20 minutes; then ultrasonically clean it with water for 4 times, each cleaning time is 5 minutes; finally use ethanol to ultrasonically clean it for 5 minutes to obtain pretreated nickel foam; among them, hydrochloric acid solution It is obtained by mixing hydrochloric acid with a mass concentration of 37% and water at a volume ratio of 1:3;

[0046] S1.3. Put a piece of S1.2 pretreated foamed nicke...

Embodiment 2

[0052] A preparation method of Fe-doped Ni-MOF nanosheets, comprising the following steps:

[0053] S1. Precursor NiCo-LDH nanosheets prepared by hydrothermal method

[0054] S1.1, the Co(NO 3 ) 2 ·6H 2 O (0.08g, 0.275mmol), Ni (NO 3 ) 2 ·6H 2 O (0.04g, 0.1375mmol), hexamethylenetetramine (HMT, 0.234g) were dissolved in 12mL of ethylene glycol aqueous solution (the volume ratio of ethylene glycol to deionized water was 1:5), and stirred until a uniform solution to obtain solution A;

[0055] S1.2. Place nickel foam in hydrochloric acid solution and ultrasonically clean it for 20 minutes; then ultrasonically clean it with water for 4 times, each cleaning time is 5 minutes; finally use ethanol to ultrasonically clean it for 5 minutes to obtain pretreated nickel foam; among them, hydrochloric acid solution It is obtained by mixing hydrochloric acid with a mass concentration of 37% and water at a volume ratio of 1:3;

[0056] S1.3. Put a piece of S1.2 pretreated foamed nic...

Embodiment 3

[0062] A preparation method of Fe-doped Ni-MOF nanosheets, comprising the following steps:

[0063] S1. Precursor NiCo-LDH nanosheets prepared by hydrothermal method

[0064] S1.1, the Co(NO 3 ) 2 ·6H 2 O (0.08g, 0.275mmol), Ni (NO 3 ) 2 ·6H 2 O (0.04g, 0.1375mmol), hexamethylenetetramine (HMT, 0.24g) were dissolved in 12mL of ethylene glycol aqueous solution (the volume ratio of ethylene glycol to deionized water was 1:5), and stirred until a uniform solution to obtain solution A;

[0065] S1.2. Place nickel foam in hydrochloric acid solution and ultrasonically clean it for 20 minutes; then ultrasonically clean it with water for 4 times, each cleaning time is 5 minutes; finally use ethanol to ultrasonically clean it for 5 minutes to obtain pretreated nickel foam; among them, hydrochloric acid solution It is obtained by mixing hydrochloric acid with a mass concentration of 37% and water at a volume ratio of 1:3;

[0066] S1.3. Put a piece of S1.2 pretreated foamed nick...

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Abstract

The invention provides a Fe-doped Ni-MOF nanosheet as well as a preparation method and application thereof, and belongs to the technical field of electrochemical material preparation. The method comprises the following steps that: S1, terephthalic acid and soluble iron salt are fully dissolved in a solvent to obtain a solution B, wherein the mass ratio of the terephthalic acid to the soluble ferric salt is 1: (0.1-0.3); and S2, a NiCo-LDH nanosheet material taking foamed nickel as a substrate and the solution B obtained in the step S1 are put into a closed container, then solvothermal high-pressure reaction is carried out at 100-120 DEG C, and after the reaction is completed, filtering and drying are performed to obtain the Fe-Ni-MOF nanosheet. The electro-catalyst of the Fe-Ni-MOF layered nanosheet structure, which is low in price and excellent in electro-catalytic performance, is synthesized by a method of combining a technology of creating a high-temperature and high-pressure environment through a solvothermal method and a metal ion synergistic effect, and the method is simple and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of preparation of electrochemical materials, in particular to an Fe-doped Ni-MOF nanosheet and its preparation method and application. Background technique [0002] The electrocatalytic oxygen evolution reaction (OER) is a crucial half-reaction in energy storage conversion technologies such as water electrolysis and metal-air batteries. Limited by the four-electron transfer coupling process, OER is a kinetically slow process. Even with expensive catalysts, the OER process still requires a high overpotential. Therefore, it is of great significance to develop highly active and stable OER electrocatalysts. [0003] At present, according to the properties of materials, OER catalysts in alkaline environments can be roughly divided into two categories: one is RuO 2 , IrO 2 and other noble metal-doped catalysts; the second is based on Fe, Ni, Co and other transition metal catalysts. Precious metal materials ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C25B11/095C25B1/04H01M4/90H01M4/88
CPCC08G83/008C25B11/095C25B1/04H01M4/9008H01M4/88Y02E60/36Y02E60/50
Inventor 林双燕孙婷婷徐志堃李林
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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