Is there anyone to explain me about the CV behavior of carbon based composite of Vanadium Nitride in which i am clearly obtaining anodic peak around -0.5 V vs Ag/ AgCl but there is no cathodic peak?
I am attaching the graph in attachment
thanks
In order to observe a redox pair rather than a "unpaired" anodic/cathodic peak, two main criteria must be fulfilled:
1) The electrochemical reaction product (in your case the species arising from the oxidation of vanadium nitride) must not be consumed in any consecutive non-electrochemical reactions (an example of such consecutive reaction would be oxidation of Ag to Ag+ in a solution containing chloride anions - before the Ag+ can be reduced, it reacts with the chlorides and precipitates as AgCl - no reduction peak will be observed)
2) There shouldn't be any factors hindering electron transfer between the electrode and the analyte.
Can you confirm that the products of vanadium nitride oxidation do not undergo any follow-up chemical reactions in your system?
PS: I would recommend the following https://sop4cv.com/chapters/ElectrochemicalReversibility.html as well as the other resources linked on this site, for a "quick and dirty" look into the matter.
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