Microring electrode: Transient and steady-state chronoamperometric current for first-order EC reactions

The transient diffusion-limited current at the ring electrode is calculated over significant time intervals and reaction rates for the full range of significant ring sizes using Danckwerts’ expression [J. Galceran, S.L. Taylor, P.N. Bartlett, J. Electroanal. Chem. 466 (1999) 15]. The steady state current for a ring electrode for EC reaction for all reaction rate is also derived. Limiting case results are compared with digital simulation results and are found to be in good agreement.