Analytical expression for transient chronoamperometric current at ultramicroband electrode

Theory of Potential Step Chronoamperometry at a Microband Electrode: Complete Explicit Semi-Analytical Formulae for the Faradaic Current Density and the Faradaic Current

“…is the Euler gamma constant. Finally, Senthamarai and Rajendran [13] presented a heuristic Padé approximant intended for all t: …”

“…Apart from the above rigorous theoretical models, a number of electrochemists [6,[11][12][13] have presented various heuristic approximations to the PSCA current, mostly in order to cover the intermediate time interval, in which the analytical solutions from Refs. [4,5] were not satisfactory.…”

Chronoamperometry on ring, ring-recessed and disk electrodes, and their arrays. The sensitive measurement of diffusion coefficients independent of a knowledge of concentration or number of electrons transferred

“…Current transients at band electrodes were studied by a number of researchers [39,[41][42][43][44][45][46]. A number of analytical expressions were derived [39,[41][42][43][44] have in common that current scales inversely proportionally to the logarithm of time. Those analytical expressions for band electrodes are not in quantitative agreement with current transients calculated earlier numerically on ring electrodes [30] as well as with results presented here.…”