| Themes > Science > Chemistry > Electrochemistry > Introduction to Electrochemical Techniques > Polarization of Reactions > Concentration Polarization |
Many electrochemical reactions produce or consume species in the solution. The rates of reactions involving dissolved species which participate as reactants in the rate-determining step (that stage in the reaction which controls its rate) will be dependent on the concentration of the dissolved species. As the dissolved species are consumed by the reaction, so a greater change in potential will be required to maintain the current, and this is known as concentration polarization. A reaction for which concentration polarization dominates is referred to as mass-transport or diffusion controlled. |
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