Electrode Reactions and Electrode Capacitance
Figure 1 describes the process that occurs in simple
electrode reactions. In the case of reduction, a species (O)
capable of receiving an electron from the electrode diffuses
to the surface, receives an electron and diffuses away from
the surface. Current at the surface is generated by the
transfer of electrons from the electrode to the redox
species. In solution current is carried by migration of ions.
You already studied this in your measurements of
conductivity.
One can ask whether a current