Homogeneous coupling

Identification of the main electroactive antioxidants involved in the global anodic signal recorded on the stratum comeum or in the cream is difficult due to the wide diversity of components. Indeed, species can react according to a heterogeneous way directly at the electrode or according to a homogeneous coupled reaction. 

We consider three simple schemes, shown in Fig. 6.11, and examine the effect of homogeneous coupled reactions on the current at the electrode they are CE, EC, and EC, where E represents an electrochemical step (at the electrode) and C a chemical step (in solution). The equations to calculate the rate constants from experimental measurements for the various types of electrode can be found in the specialized literature. In most studies the electrochemical step has been considered reversible—thus, in the following, the rate constant for the electrode reaction is not indicated. 

Skoda-Foldes, R., Horvath, J., Tuba, Z., Kollar, L. Homogeneous coupling and carbonylation reactions of steroids possessing iodoalkene moieties. Catalytic and mechanistic aspects. J. Organomet. Chem. 1999, 586, 94-100. 

To appreciate the effect of the catalysis to the i-E wave of the reactant, it is instructive to consider first the separate electrode reactions of reactant and mediator, and then the results of their homogeneous coupling. Fig. 1A shows the... 

Accounting of homogeneous reactions and analysis of heterogeneous-homogeneous coupling ... 

The simplest model accounting for the magnetic field effect is an adaptation of the classical noninteracting-hard-ball approximation where the number of hard ball-like ions is N c. In homogeneous coupled... 

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