Carbon-based ferronickel bimetallic oxygen evolution catalyst and preparation method thereof

A carbon-based nickel-iron, bimetallic technology, applied in the field of carbon-based nickel-iron bimetallic oxygen evolution catalyst and its preparation, can solve the problems of poor catalytic oxygen evolution performance and stability, poor stability, and easy corrosion

Active Publication Date: 2021-03-19
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these precious metals have low natural reserves, high prices, and are easily corroded during the electrochemical oxidation process, resulting in poor stability. These problems limit the RuO 2 , IrO 2 Further application of materials such as
The green and cheap layered nickel-iron double

Method used

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  • Carbon-based ferronickel bimetallic oxygen evolution catalyst and preparation method thereof
  • Carbon-based ferronickel bimetallic oxygen evolution catalyst and preparation method thereof
  • Carbon-based ferronickel bimetallic oxygen evolution catalyst and preparation method thereof

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Embodiment 1

[0019] S1. Mix commercially available multi-walled carbon nanotubes and sodium tetraphenylborate in a mass ratio of 1:2, and mix them uniformly by ball milling to obtain a mixed powder.

[0020] S2. Put the mixed powder above in a ceramic ark, and raise the temperature from room temperature to 800° C. at a heating rate of 10° C. per minute under an argon atmosphere, and keep it warm for 4 hours to obtain borided carbon nanotubes.

[0021] S3, get 10mg of borated carbon nanotubes and disperse them in 5mL water, then add 40wt% Ni(NO 3 ) 2 ·6H 2 O and 25wt% Fe(NO 3 ) 3 9H 2 O. Ultrasonic to make it completely dispersed, then continue to stir for 12h, and centrifuge the mixed material to obtain surface impregnated Ni 2+ and Fe 3+ The carbon nanotubes are dried to obtain the precursor powder of boride carbon nanotubes adsorbing nickel and iron.

[0022] S4. Heat the precursor powder in step 3 from room temperature to 380° C. at a rate of 10° C. per minute in an argon atmosp...

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Abstract

The invention discloses a carbon-based ferronickel bimetallic oxygen evolution catalyst and a preparation method thereof. The preparation method of the catalyst comprises the steps of: mixing carbon nanotubes and a boron-containing organic matter to obtain mixed powder, and calcining the mixed powder to obtain boronized carbon nanotubes; dispersing the boronized carbon nanotubes in water, adding anickel salt and an iron salt, performing full dipping to obtain a mixed material, conducting separation to obtain a solid substance, and performing drying to obtain precursor powder; and placing theprecursor powder in an inert atmosphere for heat treatment, and then conducting natural cooling to room temperature to obtain a target product. According to the preparation method, boron is used for modifying the surfaces of the carbon nanotubes, the reducing capacity of the surfaces of the carbon nanotubes is reduced, NiFeOOH clusters are successfully grown on the surface of the carbon nanotubes,the NiFeOOH cluster catalyst loaded by the carbon nanotubes is obtained, and the catalyst has the advantages of good conductivity, large specific surface area and the like, shows extremely high catalytic activity and has higher oxygen evolution activity. The production cost is low, and industrial application can be achieved.

Description

technical field [0001] The invention belongs to the technical field of new chemical materials, and in particular relates to a carbon-based nickel-iron bimetallic oxygen evolution catalyst and a preparation method thereof. Background technique [0002] High-performance oxygen evolution reaction (OER) catalysts in renewable energy technologies such as electrolysis of water, metal-air batteries, fuel cells and CO 2 Transformation, etc.) plays a crucial role. However, the complex and slow reaction kinetics of OER catalysts seriously restricts the catalytic performance and practical application. Therefore, it is urgent to develop efficient and stable OER catalysts to accelerate the reaction kinetics and reduce the excessively high reaction overpotential. At present, the catalyst considered as the benchmark in the OER reaction is the noble metal RuO 2 , IrO 2 and other catalysts. However, these precious metals have low natural reserves, high prices, and are easily corroded du...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/10
CPCB01J23/755B01J35/1004
Inventor 闫文盛陆影谈浩
Owner UNIV OF SCI & TECH OF CHINA
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