The value of the electric potential
of an electrode at which one of the charges defined is zero. The reference electrode
against which this is measured should always be clearly stated. The potential difference with respect to the potential of zero charge is defined by
where the potential at the point of zero charge is that for the given electrode in the absence of specific adsorption
(other than that of the solvent).
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook