High-performance iron-doped nickel- or cobalt-based amorphous oxyhydroxide catalyst prepared by room temperature method, and research thereof on high-efficiency hydrogen production by electrolyzing water

Abstract

The invention discloses a high-performance iron-doped nickel- or cobalt-based amorphous oxyhydroxide catalyst prepared by a room temperature method, and a research thereof on high-efficiency hydrogen production by electrolyzing water, and belongs to the technical field of hydrogen production by electro-catalytic materials. According to the technical scheme, FeCl3. 6H2O and ethyl alcohol are mixed to form a precursor solution to conduct surface slow corrosion on conductive substrates such as foamed nickel and cobalt produced in a macro-scale mode, and a nickel-iron or cobalt-iron oxide catalyst grows on the surfaces of the conductive substrates in situ. A chemical reduction reaction is creatively introduced, and the excellent oxygen evolution catalyst is obtained on a commercial metal conductive substrate by utilizing chemical corrosion at room temperature. According to the unique material synthesis path, the non-noble metal cobalt or nickel-based oxygen evolution catalyst shows excellent oxygen evolution activity in an alkaline environment after in-situ iron doping, the overpotential is reduced to about 280 millivolts at the large current degree of 500 mA / cm<2>, the operation is stable in the large-current environment of 1.5 A / cm<2> or above, and the catalyst is suitable for industrial large-scale application and has wide application prospects. And the hydrogen fuel automobile and hydrogen energy industry in China is assisted.

Description

technical field [0001] The present invention relates to the research field of electrocatalytic materials used in the electrolysis of water to produce hydrogen, in particular to a FeOOH / M-OOH nanosheet array oxygen evolution based on in-situ growth on the surface of metal foams such as foamed nickel, cobalt, copper or iron or porous conductive materials The preparation method of the catalyst and its application in the oxygen evolution reaction of electrolytic water in alkaline solution, wherein M refers to low-cost iron, cobalt, nickel, copper and other single or double transition metals. Background technique [0002] Continuing concerns about energy shortages and environmental pollution are driving attention towards clean energy alternatives to fossil fuels. Various forms of new energy such as wind energy, hydropower, solar energy, and geothermal energy have been rapidly applied and developed. These energy sources have the advantages of large reserves, clean, environmentally...

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Problems solved by technology

On the other hand, most of the oxygen evolution catalysts with excellent performance are based on nickel-iron-based materials, while the oxygen evolution activity of cobalt-based materials has not been improved.

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