Preparation method of ruthenium-iridium-titanium ternary metal mesh electrode containing nano tip structure

Abstract

The invention belongs to the field of preparation of electrochemical electrodes, and discloses a preparation method of a ruthenium-iridium-titanium ternary metal mesh electrode containing a nano tip structure; the method comprises the following steps: (1), performing pretreatment of a titanium wire mesh substrate, including removal of a substrate oxide film and removal of oil stains; (2), performing acid etching; (3), forming a nano tip; (4), performing preparation, coating and thermal oxidation of middle-layer coating liquid; and (5), performing preparation, coating and thermal oxidation of an active layer coating solution. The surface of the prepared electrode channel contains a large number of nano tip structures, the effective reaction area of the electrode is increased, the collision opportunity of reactants and the surface of the electrode is increased, and mass transfer is promoted. The method is low in equipment requirement, low in production cost, simple to operate and easy to regulate and control. Meanwhile, the invention also discloses application of the ruthenium-iridium-titanium metal mesh electrode containing the nano-tip structure prepared by the invention to total nitrogen removal performance evaluation and control experiments in actual production wastewater, and high total nitrogen removal efficiency and low cost and energy consumption of wastewater treatment are realized.

Description

technical field [0001] The invention belongs to the field of electrochemical electrode preparation, and in particular relates to a preparation method of a metal mesh electrode containing a nano-tip structure. Background technique [0002] Coated titanium electrodes are generally called DSA and MMOA. It is a new type of high-efficiency and energy-saving electrode material that is based on metal titanium and coated with an electrocatalytic active coating of platinum group element oxides as the main component. [0003] The titanium base is the valve metal. It is conductive when used as a cathode in the process of electrolysis of brine, but it is non-conductive as an anode and has the property of unidirectional current carrying. Adding an intermediate layer between the substrate and the active layer is an important step in coating titanium electrodes. The oxide formed between the intermediate layer and the titanium substrate will inhibit the penetration and diffusion of oxygen ...

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Problems solved by technology

[0004] However, the shape of most coated titanium electrodes is plate-like, and the electrode form of this two-dimensional structure will affect the electrode activity to a certain extent, and will limit its application scenarios.

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