A fictitious layer corresponding to the dotted straight lines of the
diagram which shows the concentration profile along the direction
perpendicular to an electrode surface. The thickness
of this layer is
called the effective (or equivalent) thickness of the
diffusion layer. Its definition is apparent from the
figure. It is the thickness which the
diffusion layer would have if
the concentration profile were a straight line coinciding with the
tangent to the true concentration profile at the
interface, and that straight line were extended up
to the point where the bulk concentration is reached.
has a formal
significance only. It is simply another way of writing the
mass transfer coefficient
defined in terms of a
resistivity instead of a
conductivity.
Source:
PAC, 1981, 53, 1827
(Nomenclature for transport phenomena in electrolytic systems)
on page 1837
Cite as:
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.
https://doi.org/10.1351/goldbook.
