Fundamentals of Electrode Reactions and Current-Potential Relations

Fundamentals of Electrode Reactions and Current-Potential Relations 

In many electrochemical techniques, we measure current-potential curves for electrode reactions and obtain useful information by analyzing them. In other techniques, although we do not actually measure current-potential curves, the current-potential relations at the electrodes are the basis of the techniques. Thus, in this section, we briefly discuss current-potential relations at the electrode. 

both Ox (oxidized form) and Red (reduced form) exist in the solution and their concentrations in the bulk of the solution are Q)x and CRed (mol cm 3), respectively. The potential of the electrode, E (V), can be controlled by an external voltage source connected to the electrolytic cell (Fig. 5.1). The electrode reaction usually consists of the following three processes  

counter electrode with a constant potential A, current measuring device V, voltage measuring device. 

Transport of the electroactive species from the bulk of the solution to the electrode surface. 

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Fundamentals of Electrode Reactions and Current-Potential Relations I 111... 

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