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

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...

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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 hydroxide (NiFe-LDH) is considered as an ideal non-precious metal-based catalyst, but its catalytic oxygen evolution performance and stability are poor at high current densities, and its conductivity is relatively low. , these defects are the main obstacles restricting its industrial application

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