The possibility for platinum electrodeposition on metallic and nonmetallic electrodes has been examined. Several materials were used to prepare the working electrodes for platinum electrodeposition: tungsten, titanium, rhenium, zirconium, stainless steel, glassy carbon (GC), polyaniline, and poly(2-hydroxy-3-aminophenazine). Efforts were made to establish experimental conditions under which the, very initial, nucleation stage of the platinum electrodeposition could be studied. It was found that tungsten, titanium, and GC were suitable substrates for nucleation and growth studies in aqueous 0.1 M HClO4 solution containing K2PtCl6.