Preparation and Characterization of Ternary Mixed Oxide Containing IrO2,RuO2,TiO2 on Platinum Coated Titanium Anode

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Ali Asghari, Sepideh | 2010

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Type of Document: M.Sc. Thesis
Language: English
Document No: 41517 (57)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Ghorbani, Mohammad; Davami, Parviz
Abstract:
Ruthenium based-oxide coatings on Titanium anodes are widely used as DSA (Dimensionally Stable Anode) for chlorine and chlorate production. Coatings consisting of composition of highly conductive oxide of noble metals (Ru, Ir and Pt) make them as long lasting anodes in chlor-alkali technology.In this work, a newly anode by a ternary coating of IrO2, RuO2, and TiO2 on the Pt-coated Ti was developed through thermal decomposition of iridium and titanium and ruthenium inorganic salts dissolved in n-pentane. The effect of deposition parameters such as current density, time, different condition of baking, heating, mole ratio and pulling up the samples was investigated to find out reasonable service life for application in electrolysis devices. Measuring the thickness, surface morphology and microstructure by Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray spectroscopy (EDX) and the behavior of corrosion by Polarization, EIS and Cyclic Voltammetry (CV) have been investigated.The high stability of the DSAs produced in the present work can be greatly enhanced by heat treatment at 450oC, pulling out rate 500mm/min, mole ratio Ir=0.15, Ru=0.25, Ti=0.6.
Keywords:
Mixed Metal Oxide ; Titanium Anods Corrosion ; Titanium Anodes

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