研究論文
酸素発生用酸化物被覆電極の高性能化
1988 年 13 巻 1 号 p. 5-13
詳細
1988 年 13 巻 1 号 p. 5-13
In order to improve the catalytic activity of an oxygen evolution electrode, the platinum group metal oxides coated electrodes have been investigated by the chronopotentiometric measurements and the real surf ace area of an electrode has been estimated by the cyclic voltammetry.
Generally, the overpotential characteristics of the electrodes are improved by mixing of platinum group metal oxides. In 1M H2SO4, it was found that the Ti/IrO2-RuO2 complex electrode had a better catalytic activity for the oxygen evolution reaction than of the Ti/IrO2 or Ti/RuO2. The complex electrode was most active among the tested electrodes for oxygen evolution. On the other hand in 5M NaOH the Ti/ RuO2-Rh2O3 complex electrode was found to be most active for the oxygen evolution reaction. The properties of these complex electrodes might be caused fundamentally by the low overpotential characteristics of RuO2 both in acid and in alkaline. The activity of RuO2 was improved by the addition of Rh2O3 or IrO2.
