L'acétonitrile n'est pas électroactif, c'est un solvant qui est connu pour sa stabilité électrochimique sur un large domaine (-2 à 2 V/ECS). Il est souvent utiliser comme solvant avec l'électrolyte support TBAP, TBAF ou LiCLO4, .....dans beaucoup de synthèse organique par voie électrochimique.

Hi Siegfried,

Here are some answers:

1)Yes depending on the cell design you could do CV with proton exchange membrane. In hydrated aqueous cells, PEM acts as a solid acid and conducts protons, essentially an electrolyte. This could also be other types of cations as well. 2) Acetonitrile has a very high potential window of stability (~ 4 V), you 'll need supporting electrolyte (some kind of a soluble salt), combination of acetonitrile/TBAF (a tetrafluoroborate salt) is very common. 3) Avoid glue and materials which could cause contamination, and watch out for your contacts.

Best,

Arman

Arman Bonakdarpour Thanks. But I don't want to use acetonitrile as a solvent. I want to use it as analyt. So I use water with a soluble salt and then I put acetonitrile (5 mM) in the solution because I want to know the E0 of acetonitrile. But I guess, seeing the answer I got, that's not possible because acetonitrile isn't redox-active. Am I right?

Hi Siegfried,

These are my thoughts for now, but you need to check them out in more details. Check the potential window of stability for acetonitrile, if I recall, it is -2.5 to about 1.5 (vs SHE), but there should be lots of references here. Therefore at the low and high potential limits you will reduce or oxidize water. If you start with acetonitrile (and some salt for conductivity but no water), you will reduce or oxidize acetonitrile eventually when you got low or high enough in potential and may not get a reversible redox behavior.

Best,

Arman