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A Chemical Reaction Interposed Between Two Electron Transfers

3 A Chemical Reaction Interposed Between Two Electron Transfers. An electrochemical process in which the product of the electron transfer undergoes a chemical reaction that generates a species which in turn is electrochemically active is defined as an ECE mechanism. It is commonly schematized as  [Pg.87]

Such a series of events can have associated aspects of more or less complicated nature depending upon 12 [Pg.88]

1 An irreversible chemical reaction interposed between two reversible one-electron transfers (case R-R). The so-called ErQEr process, if n — n2 = 1, can be written as  [Pg.88]

Amongst the ECE mechanisms, this one is perhaps the most commonly encountered in inorganic electrochemistry. [Pg.88]

The cyclic voltammetric response depends on the separation between E2 and E, or AE0. Hence, several cases are possible depending on whether  [Pg.88]


This being stated, the occurrence of a chemical reaction interposed between two electron transfers can be easily detected by plotting a graph of i vs. 1/2 20,22 pjgure 53 shows that at short times after the potential step (corresponding to kf = 0) the current depends only on the process Ox — Red, thus the slope of the function depends on the number , of electrons. [Pg.131]




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