I am polymerizing pyrrole on Screen Printed Carbon Electrode, but the trend looks as in picture attached what may be the reason behind this ?
i think this is depending on the polymerization conditions
This would suggest that the electrode area is changing due to the polymerization.
Can you give the continous scan segment number ?
The lowest one is first cycle followed by upper ones. Scan was done in voltage range of 0 t0 0.8 @ 10 mV/S
Kim's reply above is right. The same happens also with metal deposition, i.e. during nucleation.
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