Preparation method and application of core-shell petal-shaped nickel-cobalt-phosphorus coated silver nanowire electro-catalysis electrode material

Abstract

The invention discloses a preparation method of a three-dimensional core-shell petal structure nickel-cobalt-phosphorus coated silver nanowire electro-catalysis electrode material. The preparation method comprises the following steps: preparing a silver nanowire dispersion liquid; adding nickel nitrate, cobalt nitrate, ammonium fluoride and urea into the silver nanowire dispersion liquid, and stirring at room temperature until the materials are dissolved; carrying out a hydrothermal reaction, cooling to room temperature after the reaction is finished to obtain a reaction precipitate, and centrifugally cleaning the precipitate with deionized water; freeze-drying the washed precipitate to obtain a nickel-cobalt hydroxide coated silver nanowire as a precursor material; and phosphorization of the nickel-cobalt hydroxide coated silver nanowire is realized in a tubular furnace, and the three-dimensional core-shell petal structure nickel-cobalt-phosphorus coated silver nanowire electro-catalysis electrode material is obtained. The invention further discloses application of the nickel-cobalt-phosphorus-coated silver nanowire electrode material, wherein the nickel-cobalt-phosphorus-coated silver nanowire electrode material is used for OER / HER bifunctional catalytic electrolysis of water.

Description

technical field [0001] The invention belongs to the technical field of preparation of bifunctional water electrolysis electrode materials, and particularly relates to a preparation method of a three-dimensional core-shell petal-shaped nickel-cobalt-phosphorus-wrapped silver nanowire electrocatalytic electrode material. Background technique [0002] The non-renewable nature of traditional fossil fuels and environmental issues have forced researchers to develop advanced renewable energy technologies to achieve clean and renewable energy production and conversion. Currently, lithium-ion batteries, supercapacitors and electrolysis of water for hydrogen production are recognized It is an efficient way to convert and store energy. Among them, the products of electrolysis of water are hydrogen and oxygen. The reaction is safe, efficient, pollution-free, and the products are easy to separate. Hydrogen is an ideal high-efficiency, zero-emission, and sustainable clean energy. Early s...

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Problems solved by technology

[0003] The patent with the publication number CN109647460A discloses a method for preparing a NiCoP@NiCoPOx oxygen evolution catalyst with a porous three-dimensional core-shell structure by a one-step reduction method. First, at room temperature, NiCl 2 and K 3 Co(CN) 6 After ultrasonic mixing at a molar ratio of 1:1, the cyano rubber precursor was prepared by standing still, and then an equal or excess amount of NaBH was added to the cyano rubber precursor 4 / NaH 2 PO 2 Co-reducing agent, stirring to make the cyano rubber precursor react with the reducing agent, and the product after the reduction reaction is washed, centrifuged, and dried to form a NiCoP@NiCoPOx oxygen evolution catalyst with a porous three-dimensional core-shell structure. Although the preparation method is simple and the production cost is low , but its oxygen evolution activity is poor

[0004] The patent with the publication number CN112708906A discloses a method for preparing a nickel-cobalt bimetallic phosphide nanorod array electrode wrapped in nitrogen-doped porous carbon. Nickel-cobalt bimetallic organic frameworks (NiCo-MOFs@NF) were generated as precursors by immersion method, and finally NiCo-cobalt bimetallic phosphide nanorods wrapped in nitrogen-doped porous carbon were prepared by one-step carbonization and phosphating in a tube furnace array electrodes (NiCoP X @NGC@NF), although the prepared NiCoP X @NGC@NF catalyst has excellent hydrogen evolution performance, simple preparation and high reproducibility, but no research on oxygen evolution performance

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