The influence of cations on the electrode kinetics of ferricyanide-ferrocyanide system on the rotating gold electrode

Preparation and physicochemical and electrochemical characterization of exfoliated graphite oxide

“…Fig. 7B shows the oxidation of AA is found to be affected to a very small extent when ammonium ions are present in the electrolyte [49][50][51][52]. Thus, the EGO layer can be used to either catalyze or suppress the oxidation of AA at pH 7.0 depending upon the nature of the supporting electrolyte and its ionic strength.…”

“…The variation in the E a p , E c p , E p and the heterogeneous rate constant as a function of K + ion concentration in the electrolyte is given in Table 3. The observations can be rationalized by invoking the concept of the K + ion acting as a bridge between the electrode surface and the redox moiety present in the solution [49][50][51][52]. The predominantly negatively charged EGO-coated electrode surface attracts K + , which in turn forms a bridge between the EGO surface and the Fe(CN) 3−/4− 6 ions.…”

“…tions of K + than at lower concentrations. Redox kinetics of Fe(CN) 3−/4− 6 is reported to be affected by the nature and concentration of the supporting electrolyte [49][50][51][52]. Though it involves an outer sphere mechanism, the kinetics is complicated, since there is a possibility of formation of ion-pairand bridged-ion-pair-like structures,…”

Electrochemical Characterization of the Self‐assembled Monolayer of 6‐Thioguanine on the Mercury Electrode

“…Values of the formal potential for this couple ranging between 0.165 and 0.310 V (vs. SCE) (depending on the nature and concentration of the supporting electrolyte) have been determined at a bare gold electrode [33].…”

Nanoporous dual-electrodes with millimetre extensions: parallelized fabrication and area effects on redox cycling

“…At the electrodes the flux is defined via the Butler-Volmer-Equation. The transfer characteristics within the 3 M KCl electrolyte are approximated by a transfer rate of k = 8.5 Â 10 À2 cm s À1 , 53 a transfer coefficient of a = 0.5 and a redox potential of E 0 = 350 mV vs. Ag/AgCl. The sensor geometry is reduced to one radially symmetric pore in a cylindrical element, which is known as the diffusion domain approach.…”