By using the cathodic and anodic peak separation, can we comment on electrochemical reversibility?
Hey there,
for a reversible system, you'll have an interpeak distance of 59/n (where n is the stoichiometric number of electrons involved).
If you have a quasi-reversible system (interpeak distance > 59/n), you could try to estimate the standard electrochemical rate constant (k0) by using the Method of Nicholson.
Also, note that:
- If your redox couple is surface-sensitive, the kinetics are influenced by the surface functionalities of the electrode (it is the case for the ferri-ferrocyanide couple for example; IrCl62-/IrCl63- isn't surface-sensitive)
- if your electrode is porous, this may artificially lower your interpeak distance.
Hey there,
for a reversible system, you'll have an interpeak distance of 59/n (where n is the stoichiometric number of electrons involved).
If you have a quasi-reversible system (interpeak distance > 59/n), you could try to estimate the standard electrochemical rate constant (k0) by using the Method of Nicholson.
Also, note that:
- If your redox couple is surface-sensitive, the kinetics are influenced by the surface functionalities of the electrode (it is the case for the ferri-ferrocyanide couple for example; IrCl62-/IrCl63- isn't surface-sensitive)
- if your electrode is porous, this may artificially lower your interpeak distance.
Absolutely yes! In fact the peak separation (for chemically reversible systems) is the quickest judgment of electrochemical reversibility.
A very basic question for a Research Forum... Please read any textbook on electrochemistry.
We can comment on chemical reversibility on seeing the cathodic and anodic current ratio if exact 1 which is different from electrochemical reversibility, however is there any relation to those kind of reversibility with Formal potential which could makes a sense to justify that.
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