Preparation of oxygen-evolving titanium anode - iridium-tantalum coated titanium anode
With the successful application of ammonia-evolving titanium anode in the chlor-alkali industry, oxygen-evolving titanium anode has gradually been favored by applied electrochemistry. In an acidic oxygen-evolving environment, the anode will be severely corroded by acid and the strong oxidizing property of oxygen evolution, and the anode will be worn and corroded. Therefore, a long oxygen-evolving titanium anode with excellent electrochemical catalytic activity and superior electrolysis life has always been the goal of electrochemical workers.
Two major categories of commonly used titanium anodes
Iridium-based oxygen-evolving coated titanium anode and ruthenium-based chlorine-evolving coated titanium anode are currently the two main types of electrode materials for precious metal-coated titanium anodes, which use RuO₂ and IrO₂ as the main active substances, respectively. At present, the preparation method of coated titanium anode is mainly based on high-temperature thermal decomposition oxidation. Although the iridium-tantalum coated anode is not as active as the ruthenium-based coated anode in chlorine evolution, it can maintain a certain stability in the oxygen evolution environment. Therefore, the iridium-tantalum coated anode is currently the most widely used electrochemical anode material in oxygen evolution environments.
Improvement of oxygen-evolving titanium anode
Over the years, we have worked with our customers to solve the problems encountered in applications. After demonstration and research, we have improved the precious metal components of the coating and the preparation method of the coating, and continuously improved the performance of the iridium-tantalum coated anode to adapt to a wider range of electrochemical applications.
Preparation method of titanium anode - thermal decomposition oxidation
Thermal decomposition oxidation is a traditional method for preparing coated titanium anodes. It mainly involves dissolving various metal salts in organic solvents to form a coating liquid that is brushed on a titanium substrate and sintered at high temperature. The coated titanium anode is obtained after repeated brushing and sintering.
Advantages and disadvantages of thermal decomposition oxidation method
Thermal decomposition oxidation method has the advantages of low cost, simple process, and easy grasp of coating points by staff. The life of titanium anode is jointly affected by the precious metal loading, calcination temperature and substrate pretreatment, among which calcination temperature and insulation time are the main factors affecting the quality of the anode.
The precious metal coating prepared by thermal decomposition oxidation method has some deficiencies in microstructure. Under the electron microscope, the coating anode will have cracks after calcination, making the titanium anode matrix easy to be penetrated by the electrolyte, resulting in anode corrosion failure. However, as far as the current application of precious metal coating anode is concerned, thermal decomposition method is still the mainstream preparation method.
Why is thermal decomposition oxidation method widely used?
Thermal decomposition method is still a widely used preparation method, which is simple to operate, short preparation process and low equipment requirements.
Baoji JM-TITANIUM-Professional anode design and manufacturer
Over the years, we have been specialized in anode research and development, production and manufacturing, and our products are exported to many countries around the world. Various series of anodes can be designed and produced according to the actual environmental parameters of different users. You are welcome to visit and negotiate.
Nicole
Company: Baoji Jimiyun Dynamic Co., Ltd
Country:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel:+86 13369210920
Gmail:nicole@jmyunti.com
Website:www.jm-titanium.com