Preferred Label : diffusion current;
Detailed label : diffusion current (or diffusion-controlled current);
IUPAC definition : A faradaic current whose magnitude is controlled by the rate at which a reactant in
an electrochemical process diffuses toward an electrode-solution interface (and, sometimes,
by the rate at which a product diffuses away from that interface). For the reaction
mechanism there are two common situations in which a diffusion current can be observed.
In one, the rate of formation of B from electroinactive C is small and the current
is governed by the rate of diffusion of B toward the electrode surface. In the other,
C predominates at equilibrium in the bulk of the solution, but its transformation
into B is fast; C diffuses to the vicinity of the electrode surface and is there rapidly
converted into B, which is reduced.;
Origin ID : D01722;
See also
A faradaic current whose magnitude is controlled by the rate at which a reactant in
an electrochemical process diffuses toward an electrode-solution interface (and, sometimes,
by the rate at which a product diffuses away from that interface). For the reaction
mechanism there are two common situations in which a diffusion current can be observed.
In one, the rate of formation of B from electroinactive C is small and the current
is governed by the rate of diffusion of B toward the electrode surface. In the other,
C predominates at equilibrium in the bulk of the solution, but its transformation
into B is fast; C diffuses to the vicinity of the electrode surface and is there rapidly
converted into B, which is reduced.
