Metallic oxide coating electrode and manufacture method thereof

Abstract

The invention discloses a metal oxide coating electrode, which comprises a metal base body and a metal oxide coating. The metal oxide coating electrode is characterized in that an intermediate layer is arranged between the metal base body and the metal oxide coating; the intermediate layer is coated on the metal base body, and the metal oxide coating is coated on the intermediate layer; the intermediate layer is the product which is obtained from the intermediate layer coating fluid manufactured from the nanometer powder of the titanium based ceramal compound soaked in the platinum group metal compound solution, coated on the metal base body, dried, oxidized and pyrolyzed. The invention also discloses a metal oxide coating electrode preparation method. The invention has the advantages that the precious metal consumption is less, the electric catalyzing activity is high, the electric conductivity is good, the anode oxidation resistance is strong, the service life is long, the manufacture is simple, and the production cost is low.

Description

technical field [0001] The invention relates to a metal oxide electrode and a preparation method thereof, in particular to a metal oxide coating electrode provided with an intermediate layer and a preparation method thereof, belonging to the field of electrochemical engineering. Background technique [0002] Both the electrochemical industry and the electrometallurgical industry are inseparable from electrodes, and the selection of electrode materials is extremely important. The direction and kinetics of the electrode process, the structure type of the electrode and the electrolytic cell and the life of the cell, the maintenance cost and labor consumption, and the dynamic index of the process all depend to a large extent on the structure of the electrode and the materials used, especially The electrode type and cell structure design are closely related to the durability, conductivity, electrocatalytic activity and power consumption of the electrode material. The continuous d...

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Problems solved by technology

Regarding the inhibition of the oxidation-induced passivation of the titanium substrate to cause electrode failure, the relevant literature has proposed the use of tantalum as the intermediate layer, but a fatal shortcoming of this method is that the cost of manufacturing the electrode is too high, and the application value is lost.

It is also pointed out in the literature that the oxidation passivation time of the titanium substrate can be reduced by increasing the number of coatings of the catalytic layer and increasing the thickness of the catalytic layer, but this undoubtedly greatly increases the manufacturing cost of the electrode, and in terms of the final effect, it affects the life of the electrode. Improvement is also limited

A Chinese patent application with application number 2006101441469 discloses a SnO 2 / IrO 2 -Ta 2 o 5 -SnO 2 / Ti electrode, a kind of titanium is disclosed in CN 03133317 as substrate, is coated with PbO 2 or SeO 2 In addition to the narrow scope of application, the above-mentioned electrodes all have the problems of high manufacturing cost and short electrode life

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