EFFECTS OF THE ANODIC DECOMPOSITION OF GAAS PARTICLES AT THE PT ELECTRODE INTERFACE

The electrolytic decomposition effect of GaAs particles on electrochemical phenomena at the Pt/10(-3)M KCl aqueous solution interface has been studied using voltammetric, time-based, and electrochemical-impedance techniques. The observed anodic decomposition effect of the GaAs particles on electrochemical phenomena was significant within the positive potential range (0 to 1.0 V vs. SCE). On the other hand, the cathodic decomposition effect of the GaAs particles was negligible in the negative potential range (0 to -1.0 V vs. SCE). The GaAs particles act as current activators or mediators during the anodic process and act as charge screens during the cathodic process. The solution resistance and related total impedance were increased due to the presence of the GaAs particles. The anodic decomposition of the GaAs particles can be used to increase the hydrogen evolution at the counterelectrode.