Advanced Peak Redox Current Calculator

Understanding Peak Redox Current and Randles-Sevcik Equation

Electrochemistry heavily relies on cyclic voltammetry to analyze reaction mechanisms and charge transfer dynamics. The peak redox current ($i_p$) represents the maximum current observed in a cyclic voltammogram. Determining this value accurately helps researchers understand diffusion characteristics and concentration profiles near the working electrode interface.

Formula Used

For a reversible electrochemical system, the Randles-Sevcik equation at 298.15 K and general temperatures is expressed as:

$$i_p = 0.4463 \cdot n \cdot F \cdot A \cdot C \cdot \left(\frac{n F v D}{R T}\right)^{1/2}$$

Where $n$ is electrons transferred, $F$ is Faraday's constant, $A$ is electrode area, $C$ is concentration, $v$ is scan rate, $D$ is diffusion coefficient, $R$ is the gas constant, and $T$ is temperature.

How to Use This Calculator

Input your parameters across the three configuration columns. Specify the number of electrons, active electrode surface area, analyte concentration in millimoles, diffusion coefficient scaling factor, scan rate, system temperature, and electron transfer mechanism. Click the submit button to instantly compute your exact peak redox current value.

Frequently Asked Questions