I am trying to set-up a new cyclic voltammetry measurement station in my lab but the results are very poor. I am using the following parameters:
working electrode: platinum wire, 0.25mm diameter counter electrode: platinum wire, 0.25mm diameter reference electrode: none solvent: acetonitrile electrolyte: ferrocenecarboxaldehyde support electrolyte: tetrabutylammonium hexafluorophosphate scan rate: ~600mV/s
Platinum wires each have a submerged length of about 2mm to 5mm and are separated by about 2cm. I was previously using tetrabutylammonium iodide, but that is probably not a good support because the iodide ions will become iodine and forming a blocking layer on my electrode?
I also tried using graphite rods as the electrodes but obtained similar poor-looking CV shapes.
What should I change to obtain the standard CV shape of an outer-sphere redox species?