YES, absolutely, sometimes the platinum wire is flattened to achieve more surface. The only precaution is to have more surface area than the working electrode.
You can use platinum.sheet instead of platinum rod as counter electrode for Cyclic voltammetry test. The counter electrode needs to be a lot bigger than the working electrode.the products are formed at the counter electrode which must not enter the main reactions.
Yes, u can use use as platinum foil/ sheeet as a counter electrode with desire size and also you prepare the counter electrode as home made by using silver paste and copper wire(for contact) with platinum foil.
You can use platinum foil as counter electrode and normally we platinise platinum sheet in chloroplatinic acid electrchemically to increase the surface area.
My sample is fine powder (Pd/Al2O3), if i deposit a thin layer over Indium foil (not IOT) and use it as working electrode, will it work in CV? And what could be the preferred electrolyte solution. Suggestion from expert in the field