Preferred Label : Frumkin effect;
IUPAC definition : In an electrode reaction, when reactants or intermediates are adsorbed, the rate of
reaction may no longer be related to the concentration by a simple law. The deviation
may be due to either entropic or energetic effects or both. The situation best understood
is that where a reactant is non-specifically adsorbed in the outer Helmholtz plane
(inner boundary of the diffuse layer). The effect of such adsorption on electrode
kinetics is usually termed the Frumkin effect. Rate constants, transfer coefficients
etc. corrected for this effect are frequently called 'true' rate constants etc. It
would be preferable to describe them as 'corrected for the Frumkin effect', but in
any case, if such a correction is carried out, the basis on which it is made should
be clearly described.;
Origin ID : F02538;
See also
In an electrode reaction, when reactants or intermediates are adsorbed, the rate of
reaction may no longer be related to the concentration by a simple law. The deviation
may be due to either entropic or energetic effects or both. The situation best understood
is that where a reactant is non-specifically adsorbed in the outer Helmholtz plane
(inner boundary of the diffuse layer). The effect of such adsorption on electrode
kinetics is usually termed the Frumkin effect. Rate constants, transfer coefficients
etc. corrected for this effect are frequently called 'true' rate constants etc. It
would be preferable to describe them as 'corrected for the Frumkin effect', but in
any case, if such a correction is carried out, the basis on which it is made should
be clearly described.
