heterogeneous diffusion rate constant

in electrochemistry

Defined by the equation:

$k d = I l n F c A$

where the limiting current $I l$ is assumed to be due to the diffusion species of concentration $c$ and of diffusion coefficient $D$ . $n$ is the charge number of the cell reaction written so that the stoichiometric coefficient of this species is unity. $A$ is usually taken as the geometric area of the electrode, and $F$ is the Faraday constant.

Source:

PAC, 1974, 37, 499 (Electrochemical nomenclature) on page 513