Preparation method for NiCoP nanowire electro-catalytic electrode

Abstract

The invention discloses a preparation method for a NiCoP nanowire electro-catalytic electrode. A NiCo salt nanowire is adopted as a phosphorization precursor, hypophosphite is used as a phosphorus source, and the phosphorization process of the NiCo salt nanowire is achieved by controlling the annealing technique in a stored program control tube type annealing furnace. The diameter of the NiCoP nanowire obtained through the method is 140 nanometers, the length of the obtained NiCoP nanowire is about 3.2 micrometers, and the surface of the nanowire is roughly and evenly grown on a 3D netty foamed nickel substrate, so that the specific surface area and the electric conductivity of an electro-catalytic material are effectively improved, and the electro-catalytic hydrogen evolution performance and stability of an electrode material are improved. The electro-catalytic hydrogen production performance of the electrode is tested in 1M of a KOH electrolyte, the overpotential under the electric current density of 10 mA / cm<2> is 109 mV, and the Tafel slope is 88.5 mV / dec, so that the material has the superior electro-catalytic hydrogen production performance compared with common electro-catalytic hydrogen evolution materials. Meanwhile, the preparation technique is simple, the equipment requirement is conventional, reactive materials are abundant, price is low, and the electrode is environmentally friendly.

Description

technical field [0001] The invention relates to a catalytic hydrogen production material for electrolysis of water, in particular to a preparation method of a NiCoP electrocatalytic hydrogen production material for electrolysis of water. Background technique [0002] Due to the serious energy demand and environmental pollution, it is imminent to find an efficient, clean and sustainable energy source. Hydrogen, as an abundant, renewable and clean energy source, is considered to be one of the most promising energy materials in the future [[1] Bard , A.J.; Fox, M.A. Acc. Chem. Res. 1995, 28, 141]. At present, there are many ways to produce hydrogen, among which hydrogen production by electrolysis of water has attracted much attention due to its simple equipment, no pollution, and high product purity. The hydrogen production reaction of electrolyzed water occurs on the electrode surface, including two basic half-reactions, the cathodic hydrogen evolution reaction and the anode ...

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Problems solved by technology

But its disadvantage is that the specific surface area of ​​the prepared coating is too small, which leads to poor durability, and it will cause a decline in performance after a period of time.

[0005] The patent application No. 201410133843.9 discloses a method for preparing a high-performance nickel-based ruthenium-containing composite oxide hydrogen evolution electrode, which mainly uses a solvothermal synthesis method to grow nickel-ruthenium oxide nanorods in situ on a foamed nickel substrate to obtain The specific surface area of ​​the electrode is large, and it is firmly combined with the substrate. The resulting product has a large specific surface area, many active sites and strong catalytic activity. It has excellent hydrogen evolution performance and high stability, but its disadvantage is that the prepared product High toxicity and easy to pollute the environment

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