When i take CV, the curve is double lined instead of one, i have tried changing the electrodes, i attach the picture here, Anybody who had similar experience please give your expertise?
Thanks in advance
Abisheik,
I encountered the same problem as yours before using the CHI Electrochemical Workstation (I think you use the same one judging from the software interface). The problem is not due to the working electrode but the reference electrode. Particularly for your second figure, I can see the current signal is pretty noisy. It suggests that the potential of the reference electrode is not fixed. Try replacing it with a new one and re-test to see if the problem persists. If so, considering changing the counter electrode or use other working electrode (which you are confident must work).
Check the film on the working electrode. Is it stable during the process or some parts removed. That will change film resistance and lead to instability in output current.
A high impedance Reference Electrode (RE) will cause problems that range from simple overloads to potentiostat oscillation[1]. If the impedance is too high[1,2], then replace the RE.
1. Measuring the Impedance of Your Reference Electrode https://www.gamry.com/application-notes/electrodes-cells/measuring-the-impedance-of-your-reference-electrode/
2. Reference Electrodes:Reference Electrode Impedance https://www.basinc.com/manuals/EC_epsilon/Maintenance/reference#impedance
Fill the reference electode with a fresh KCl and then it may give you desired results.
Respected People of Science,
Thank you for your advice, i tried with different Reference electrodes, I found that my RE is responsible for the disortion caused. Thank you for helping me out!
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