Abstract: Electrode kinetics plays a central role in electrochemical processes relevant to a number of industrial sectors including chemical, energy, material and environment protection. The electrode kinetic processes include diffusion, charge transfer in electrolyte and surface adsorption/ desorption. The modes of mass transfer processes include convection, diffusion and electronic migration. The current-voltage relationship is the basic route to characterize the electrode reaction kinetics, and under specific electrode conditions, the Tafel semi-log equation and Butler-Volmer dynamic equation could be derived respectively for polarization curves and electrode reaction kinetics. The surface processes include pre-positive and post-positive surface conversions. Moreover, fluid mechanics calculations can reveal the tangential flow behavior on the surface of electrode and the effects on mass transfer of rotating disk electrode process.

Key words: electrode process, kinetics, mass transfer, surface adsorption, fluid mechanics