Preferred Label : concentration overpotential;
IUPAC definition : The concentration overpotential of an electrode reaction at a given electrode current
density (c.d.) is basically the difference in equilibrium potentials across the diffusion
layer. More precisely, it is the potential of a reference electrode (of the same electrode
reaction as the working electrode ) with the interfacial concentrations which establish
themselves at c.d., relative to the potential of a similar reference electrode with
the concentrations of the bulk solution. From such a measured potential difference,
with c.d. flowing, one needs to subtract the ohmic potential drop prevailing between
the two electrodes.;
Origin ID : C01230;
See also
The concentration overpotential of an electrode reaction at a given electrode current
density (c.d.) is basically the difference in equilibrium potentials across the diffusion
layer. More precisely, it is the potential of a reference electrode (of the same electrode
reaction as the working electrode ) with the interfacial concentrations which establish
themselves at c.d., relative to the potential of a similar reference electrode with
the concentrations of the bulk solution. From such a measured potential difference,
with c.d. flowing, one needs to subtract the ohmic potential drop prevailing between
the two electrodes.
