In common electrochemical usage,a "kinetically controlled reaction" is one in which the transport of redox molecules is fast relative to the rate of electron transfer at the electrode-electrolyte interface.Increasing diffusion rates to reach the kinetic limit is a central concept of many electroanalytical techniques used to investigate electron-transfer kinetics (7,2).For example,in cyclic voltamme-try experiments of freely diffusing redox species,the electrode reaction rate becomes controlled by electron-transfer kinetics at sufficiently high potential sweep rates,a consequence of increased diffusion rates as the sweep rate is increased (3-5).
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