The adsorption of ClO- 4 ion on liquid gallium from aqueous solutions of (NaClO4 + HClO4) 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.
NaClO4 electrosorption on liquid gallium from water / G. Pezzatini; M. Foresti; M. Innocenti; R. Guidelli.. - In: JOURNAL OF ELECTROANALYTICAL CHEMISTRY AND INTERFACIAL ELECTROCHEMISTRY. - ISSN 0022-0728. - STAMPA. - 295:(1990), pp. 265-273. [10.1016/0022-0728(90)85021-V]
NaClO4 electrosorption on liquid gallium from water
PEZZATINI, GIOVANNI;FORESTI, MARIA LUISA;INNOCENTI, MASSIMO;GUIDELLI, ROLANDO
1990
Abstract
The adsorption of ClO- 4 ion on liquid gallium from aqueous solutions of (NaClO4 + HClO4) 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.
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