SURFACE HYSTERESIS FOR COPPER TRAPPING ON BORON-DOPED DIAMOND ELECTRODE

摘要

The electrochemical reduction of Cu~(2+) proceeded on both surfaces, which underwent electrochemical hydrogen or oxygen evolution. However, the reduced copper atoms were trapped only on the surface on which the hydrogen was evolved in advance. On the oxygen evolved surface, the reduced copper atoms were not trapped on the surface and it formed metal clusters in the solution. These two surfaces changed reversibly depending on the pretreatment. The time course of this surface transition was investigated as a function of the gas evolution period and also the electrode potential.