Hello all,
I have been trying to modify a plain printed carbon electrode with cobalt(II) phthalocyanine and I have found my CV does not look like any of the CVs in literature. I have attached a copy of my CV to demonstrate.
Protocol:
Suspended 10mM CoPC in 1:1 H20:MeOH, probe sonicate for 10 minutes. Solvent cast 5uL onto the WE and leave to dry at room temp.Wash with MeOH and run in pH7.2 PBS (0.1M).
Most literature shows redox peaks for CoPC at ~-0.3 - -0.1V, however my electrode using a Pt count, AG/AgCl ref shows 1 giant reduction peak at -0.22V but no oxidation peak occurs.
Any suggestions?
I think depends on kind of material (sheet / chemicals), concentration, cleaning procedure.
Have you tried altering the potential window and changing the scan rate? Maybe scan to a less negative potential potential? For instance, scan down to -0.5 V vs Ag/AgCl. Reduce the scan rate and see if you can improve the response.
I agree with the previous answers and suggest you to add cobalt (III) oxyhydroxide to phthalocyanine. It would enhance the catalytic efficiency of the catalyst.
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