I keep getting this kind of CV and DPV curves. The DPV does seem like having a plateau instead of a smooth peak.

(1) What could be the cause of this?

(2) If I use the DPV peak to compare different concentrations, would that be valid in a peer-reviewed article?

I changed the scan rate from 0.01 V/s to 0.25 V/s (my potentiostat max), but could not find a sharp and short peak anywhere.

Another question is, (3) I feel like increasing the scan rate more could help me get the sharp peak, am I wrong to think that way?

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