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Chemistry

Probing Electron Transfer Kinetics at Electrode Surfaces with Cyclic Voltammetry

Quick fact

The peak-to-peak separation in a cyclic voltammogram, which is exactly 59 mV for a fully reversible one-electron transfer at 25°C, directly reflects the rate of electron transfer, with larger separations indicating slower kinetics and allowing direct measurement of the heterogeneous rate constant.

Why this is interesting

You've probably seen a cyclic voltammogram that looks like a duck with a current peak on the way up and another on the way back. Did you know that the distance between those two 'legs' is the key to unlocking how fast electrons jump?