Electrolyzed water catalyst of nonconventional local area structure and preparation method thereof

Abstract

The invention relates to an electrolyzed water catalyst of nonconventional local area structure and a preparation method thereof. In the preparation method, A-position element of perovskite is selectively dissolved by using a method of treatment through an ultrasonic-assisted ferric iron solution, perovskite crystal oxide with small specific surface area is converted into amorphous hydroxide of ananostructure, and the hydroxide has extraordinary local area electron structure and geometric structure, thereby having ultrahigh oxygen precipitation performance. In consideration of pH difference of AB-position elements of a perovskite material, ferric iron with proper acidity is selected as a regulator, material structure is changed, and new active sites are introduced, so that ultrahigh OER activity is caused; the catalyst can be applied in the field of fuel cells, metal-air cells and water electrolysis.

Description

technical field [0001] The invention relates to an electrocatalyst with an unconventional local structure and a preparation method thereof, belonging to the field of synthesis of electrocatalytic materials. Background technique [0002] Energy and environmental issues are increasingly becoming the focus of attention. At present, countries that use fossil fuels such as coal and oil as their main fuels are already facing serious environmental pollution, coupled with the deepening dual crisis of limited reserves of fossil fuels, developing and utilizing clean and renewable energy, improving energy structure, and reducing greenhouse gases Emissions and protection of the environment on which human beings depend have become an important part of the world's energy sustainable development strategy. Electrolysis of water and photolysis of water can provide a steady stream of hydrogen, and hydrogen is considered to be a clean energy carrier for driving fuel cells and reducing car...

AI Technical Summary

Problems solved by technology

Noble metal RuO 2 or IrO 2 It has good catalytic activity for oxygen evolution reaction (OER), but these noble metal catalysts cannot meet the requirements of large-scale applications due to high cost and low stability.

[0004] Perovskite materials have high intrinsic activity for OER, but their small specific surface area seriously hinders the practical application of perovskites as OER catalysts.

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