I know it is a very basic question but we have tried many times and are getting different values so for the confirmation I am posting here.
F is the Faraday constant (96,485 C mol-1 ). C0 is the bulk concentration of O2 (1.2 × 10-6 mol cm-3 ). D0 is the diffusion coefficient of O2 in 0.1 M KOH (1.9 × 10-5 cm2 s -1 ). ν is the kinematic viscosity of the electrolyte (0.01 cm2 s -1 ). k is the electron transfer rate constant and adopts 0.2 when ω is expressed in rpm.)