Preparation method for tantalum-contained interlayer metallic oxide electrode

Abstract

The invention belongs to the electrochemical technical field, and relates to a preparation method for a tantalum-contained interlayer metallic oxide electrode. The electrode is suitable for occasions including steel plate high-speed electroplating, seawater electrolysis marine life pollution and damage prevention devices, sodium hypochlorite electrolysis production devices, sewage treatment, cathode protection and the like in the electrochemistry industrial field. The main process comprises three steps, namely substrate pretreatment, tantalum-contained interlayer preparation and oxide coatingpreparation: firstly, a tantalum-contained interlayer is prepared on a titanium substrate by adopting a thermal decomposition method, and then a mixed metallic oxide electro-catalysis coating is prepared on the tantalum-contained interlayer; the mass percent purity of the metallic titanium substrate is larger than 99%; and the process is simple and convenient to carry out, the metallic oxide electrode with larger size or more complicated structure can be prepared, and the tantalum-contained interlayer can better protect the titanium substrate, delay the titanium substrate inactivation, improve the stability of the oxide electrode and prolong the service life.

Description

Technical field: [0001] The invention belongs to the technical field of electrochemistry, and relates to a preparation method of a metal oxide electrode containing a tantalum intermediate layer. The electrode is suitable for the electrochemical industry, such as high-speed electroplating of steel plates, electrolytic seawater anti-sea biofouling devices, sodium hypochlorite electrolytic production devices, Sewage treatment, cathodic protection, etc. Background technique: [0002] The anode used in the electrolysis industry requires good electrocatalytic activity in order to reduce the tank pressure of the electrolytic cell and improve the electrolysis efficiency; at the same time, it also needs to have high stability and long service life. Conventional RuO 2 -TiO 2 Metal oxide anodes and oxide anodes modified by adding a small amount of Ir, Sn, Co, etc. on this basis have good electrocatalytic activity, but their stability needs to be improved, especially under the conditi...

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Problems solved by technology

The method of adding tantalum coating on the titanium substrate of the metal oxide electrode has molten salt electroplating [Cardarelli F, Taxil P, Savall A. Preparation of oxygen evolving electrodes with long service life under extreme conditions, Journal of Applied Electrochemistry, 1998( 28): 245~250] and magnetron sputtering method [Pan Jianyue, Sun Fengmei, Luo Qifu. Technology research on titanium anode magnetron sputtering tantalum, coating industry, 2004, 26(3): 26-28], etc., but existing These methods generally have disadvantages such as complex process, high cost, and not suitable for preparing large-scale electrodes.

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