Yes, you can use platinum electrode as working and counter for PEIS but using the same electrode material as both the working and counter electrode, there might be potential interference in the impedance spectra due to non-ideal behavior at the electrode-electrolyte interface.
Yes you can.no problem. Ensure cleaning all the tips and electrodes and use 3.5M or saturated I'd prefer 3.5M KCl
Yes, you can technically use a platinum electrode as a working electrode with an Ag|AgCl reference electrode for PEIS (Photoelectrochemical Impedance Spectroscopy) measurements. However, it's not the most recommended approach due to potential stability issues.
Issues could be:
The platinum electrode might not be stable in the electrolyte used for PEIS, leading to drifting baseline or inaccurate measurements.
Platinum can potentially react with the analyte being studied in PEIS, affecting the measurement results.
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