Abstract
The value of spectroelectrochemistry (SPEC) for the elucidation of electrode reactions with complex stoichiometries (aO +ne-⇄bR) is investigated theoretically. The analytical equations presented enable the modelling of the absorbance response in both normal- and parallel-beam modes and any potential-controlled technique. As a proof of concept, the SPEC signals of the 1:2 and 2:1 stoichiometries in chronoamperometry and cyclic voltammetry are studied and compared with the 1:1 case, demonstrating how SPEC can assist the simultaneous and unambiguous determination of the stoichiometric coefficients of the redox species.
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