We are using GCE for Electrochemical sensing purpose. We dropcasted Graphene on the electrode surface and tried to observe the redox peaks in potassium ferricyanide solution. We got the proper redox peak for the first time, further on polishing with Alumina slurry no redox peaks were observed in potassium ferricyanide even in bare GCE. So what would be the possible problems and the solution?

  • We tried to remove the deposited material by running 50 segments of CV in 1 M of Sulphuric acid.
  • We tried sonicating the electrode with acetone.
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