The Cottrell's Equation calculator computes the electrochemistry current based on the time, number of electrons, Faraday constant, area of the electrode, initial concentration of the reducible analyte and a diffusion coefficient for species.
INSTRUCTIONS: Choose units and enter the following:
Current (i): The electrochemical current is returned in amperes. However, this can be automatically converted to compatible units via the pull-down menu.
Cottrell's equation describes the change in electrical current in electrochemistry as a function of time (t), number of electrons(n), the Faraday constant (96485.3399 C/mol), the area (A) of the electrode, initial concentration of reducible analyte (cj0), and a diffusion coefficient for species.
` i = (n*F*A*c_j^0*sqrt(D_j))/sqrt(pi*t)`
where: