NaClO 4 electrosorption on liquid gallium from water

Abstract

The adsorption of ClO − 4 ion on liquid gallium from aqueous solutions of (NaClO 4 + HClO 4) of concentrations ranging from 0.01 to 5.62 M was determined on the basis of capacitive charge measurements carried out by a computerized chronocoulometric technique. At electrolyte concentrations < 1 M, perchlorate ion is adsorbed non-sperifically, the Gouy-Chapman-Grahame theory applies over the whole accessible range of charge densities, and the potential of zero charge is constant and equal to −(920 ± 5) mV/MCE. Only at ClO − 4 concentrations ⩾1 M does anionic positive specific adsorption start to be felt.