Electrochemical scanning tunneling microscopy observation of ordered surface layers on an anionic clay-modified electrode

摘要: Electrochemical scanning tunneling microscopy (STM) observations have been performed on a highly ordered pyrolytic graphite (HOPG) electrode modified with cast film of hydrotalcite (HT) crystal ([Mg6Al2(OH)16]3/4CO3·1/2Cl·2H2O). The was in contact an aqueous solution 5 mM Na3[Fe(CN)6] and 0.1 M Na2SO4 at 600 mV (vs Ag/AgCl). STM image the showed two-dimensional lattice = 1.40 ± 0.04 nm, b 1.85 α 63 3°. One bright spot present every 3.4 [Mg6Al2(OH)16]2+ units, leading to conclusion that represented [Fe(CN)6]3- ion adsorbed surface. At 81 Ag/AgCl), exhibited 1.74 1.83 nm 60 This ascribed made by mixture [Fe(CN)6]4- HT −200 1.94 1.90 3°, wh...