A method for preparing nanoporous nickel-iron-sulfur alloy with high catalytic oxygen evolution performance by electrodeposition in eutectic ionic liquid

Abstract

The invention relates to a method for preparing a nanometer porous nickel-iron-sulfur alloy having a high catalytic oxygen evolution property through electrodeposition in a eutectic type ionic liquid, and belongs to the technical field of material preparation. The method includes fully mixing a quaternary ammonium salt with an alcohol or an amide to obtain the eutectic type ionic liquid, then adding a nickel salt precursor, an iron salt precursor and a sulfur salt precursor into the eutectic type ionic liquid, fully stirring and mixing the mixture to obtain an ionic liquid iron salt-nickel salt-sulfur salt composite electrolyte, subjecting a copper or nickel substrate that is adopted as a working electrode to repeated soaking with dilute hydrochloric acid and absolute ethanol, washing the working electrode with deionized water, then drying the working electrode, keeping the working electrode for later use, performing constant-potential electrodeposition by adopting a three-electrode system, washing the working electrode substrate after the electrodeposition with absolute ethanol and distilled water, and drying the working electrode substrate, and then a nanometer porous nickel-iron-sulfur alloy material film can be obtained on the surface of the working electrode substrate. A nickel-iron-sulfur alloy nanometer porous material having a high catalytic oxygen evolution property can be prepared by electrodeposition through the method.

Description

technical field [0001] The invention relates to a method for preparing a nanoporous nickel-iron-sulfur alloy with high catalytic oxygen evolution performance by electrodeposition in a deep eutectic ionic liquid, and belongs to the technical field of material preparation. Background technique [0002] Nickel and its alloy catalytic materials have become a research hotspot of oxygen evolution electrode materials because of their low cost, wide source, high catalytic oxygen evolution activity, and strong corrosion resistance. They are recognized as ideal electrode materials that are expected to replace noble metals. In nickel-based alloys, the catalytic performance of nickel-iron alloys is better than that of other nickel-based catalysts because nickel-iron alloys form catalytically active nickel hydroxylation during the catalytic process. Due to the poor electrical conductivity between metals, the catalytic performance of nickel-iron-based catalytic materials cannot be further...

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Problems solved by technology

[0003] The traditional methods for preparing nickel-iron-sulfur alloys mainly include solvothermal method, hydrothermal method, liquid phase method, electrodeposition method, mechanical method, etc. These methods often have high temperature, high consumption, and difficulty in control during the preparation process. Disadvantages, great damage to the environment, high technical requirements for equipment, difficult performance control and many other problems limit the wide application of nickel-iron-sulfur alloys

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