Ml. Shi et Fc. Anson, NON-STEADY-STATE ROTATING-DISK VOLTAMMETRY OF REDOX COUPLES INCORPORATED IN PERFLUOROSULFONATED IONOMER COATINGS ON ELECTRODES, Analytical chemistry, 69(14), 1997, pp. 2661-2668
The differences in the affinity of Nafion coatings for Ru(NH3)(6)(3+/2
+) and Os(bpy)(3)(3+/2+) counterions and the difference in the mobilit
ies of the two types of cations within Nafion are used to explain the
differences in the voltammetric signatures that they exhibit. A new me
thod is proposed with which to determine whether apparent diffusion co
efficients of electroactive counterions in electrode coatings differ w
hen they are evaluated in transient or in steady-state experiments. Th
e utility of non-steady-state cyclic voltammetry with Nafion-coated ro
tating disk electrodes to separate the contribution to the observed cu
rrent from dissolved and Nafion-confined reactants is demonstrated.