Titanium-base TiNx/TiO2-RuO2 nano coating anode

Abstract

The invention belongs to the technical field of preparation of insoluble anodes in electrochemical industry, and particularly relates to a titanium-base TiNx / TiO2-RuO2 nano coating anode. The anode comprises a titanium base positioned on the inside, a TiNx middle layer positioned in the middle, and a TiO2-RuO2 nano coating positioned on the outside, wherein the TiNx middle layer is prepared by ionitriding the titanium base; and the TiO2-RuO2 nano coating can be prepared by a sol-gel process. The thickness of the TiNx middle layer in the anode can reach 50-200 mu m. The TiO2-RuO2 nano coating comprises a multilayer structure, and the grains have small size and are uniformly arranged to form a favorable nano array, thereby greatly increasing the active surface area of the anode and enhancing the electrocatalytic activity of the anode. Compared with the prior art, the titanium-base TiNx / TiO2-RuO2 nano coating anode has obviously higher electrocatalytic activity and service life than the prior art, and has favorable popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of insoluble anode preparation in the electrochemical industry, and specifically relates to a titanium-based TiNx / TiO 2 -RuO 2 Nano-coated anode. Background technique [0002] The anode is a key component in the electrochemical industry, generally divided into soluble anodes and insoluble anodes. Among them, the earliest applications of soluble anodes are graphite anodes and lead anodes. The anode can be divided into a chlorine analysis anode and an oxygen analysis anode according to the different gases released. The graphite anode belongs to the chlorine evolution anode, and the lead alloy anode belongs to the oxygen evolution anode. [0003] With the continuous development of industry and science and technology, traditional anode materials are increasingly showing their limitations. For example, the corrosion resistance of graphite anode is not very ideal, and the strength is not high; the electrocata...

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Problems solved by technology

[0005] However, at a high overpotential, the electrolyte contacts the substrate through the microcracks in the coating, so the surface of the Ti substrate is easily oxidized to form poorly conductive and loose TiO 2 layer, causing the cell voltage to rise sharply within a few hours and cause the coating to peel off, especially in an oxygen evolution environment with a high overpotential, the requirements for the anode are more stringent

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