Oxygen evolution on titanium anodes coated with conductive metallic oxides: Kinetics and mechanism in alkaline solution
✍ Scribed by Shixiong Jin; Siyu Ye
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 830 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
Ti/SnO, + CuCo,O, and Ti/RuO, + TiO, anodes were used to study oxygen evolution in alkaline solutions and to compare the kinetics on both electrodes. On each electrode the existence of two Tafel regions was confirmed. At low current density (cd) the Tafel slope is 39mV decade-', whereas at high cd it is 120mV decade-'. The reaction orders with respect to the activity of OH-(a,,.), or the activity of water (a,) in two Tafel regions and in dilute and concentrated alkaline solutions, respectively, were obtained. According to the obtained kinetic data, the mechanisms of oxygen evolution on these types of electrodes were proposed.