Chemistry
Rotating Disk Electrodes for Studying Electrode Kinetics
Quick fact
By analyzing how the current through a rotating disk electrode changes with rotation speed and potential, scientists can directly extract the rate constant of electron transfer—often without knowing the diffusion coefficient in advance.
Why this is interesting
Ever wondered how scientists measure the speed of an electron transfer, the heart of every battery and fuel cell? They spin an electrode to control the flow of molecules—here's how.