An improvement of the Pt Ti anode by the use of TiO2 binder

To improve the durability of the platinized titanium anode, TiO2 gel prepar ed by sol-gel method was used as the binder between Pt film and Ti substrat e. The durability of Pt/TiO2/Ti and Pt/Ti electrodes after annealing at 200 , 300, 400 and 550 degrees C were examined in 1 M H2SO4 solution at an anod ic current density of 200 A/dm(2), temperature being at 60 degrees C. When the anode with TiO2 binder was annealed at 550 degrees C, the durability of Pt/T anodes was improved by a factor of about 3, compared with usual type anode annealed at 200 degrees C. It was found that TiO2 binder began to cry stallize from amorphous to anatase structure at around 300 degrees C. We as sumed that a mixed phase of Pt, TiO2 and Ti could be formed at temperatures over 300 degrees C.