Fast sweep cyclic voltammetry at ultra-microelectrodes: Evaluation of the method for fast electron-transfer kinetic measurements

摘要: With ultra-microelectrodes (in the 10 μ m diameter range), it is possible to decrease ohmic drop values that allow use of very high scan rates in cyclic voltammetry (10–1000 kV s−1. Although reduced as compared with standard size microelectrodes, is, however, not negligible and thus must be appropriately corrected for. On other hand, at these sweep double-layer charging current a substantial portion total current. The correct treatment voltammetric data necessitates an correction takes into account mutual dependence faradaic currents. Such applied reduction anthracene dimethylformamide, test example fast electron-transfer kinetics (kSap = 3.5 cm s−1), ranging from 20 250 system analysed both by direct simulation voltammograms means convolution diffusion function (πt)−12. effect band-pass limitations potentiostat measurer on responses also discussed.