Infrared spectroscopic observation of water at a polycrystalline gold electrode/aqueous perchlorate solution interface

✍ Scribed by F. Kitamura; T. Ohsaka; K. Tokuda

• Book ID: 104114990
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 389 KB
• Volume: 42
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/s0013-4686(96)00295-2

✦ Synopsis

The interfacial behaviour of water molecules at a polycrystalline gold electrode surface in aqueous lithium, potassium and magnesium perchlorate solutions were investigated by in situ Fourier transform infrared reflection absorption spectroscopy (FT-IRAS). OH stretching absorption bands of water associated with anions or cations were observed, which showed almost no potential-dependent frequency shift in every solution. On the other hand, weak but relatively narrow bands were detected in 3500-3200 cm-' region, which apparently shifted toward lower frequencies with negative potential change (N 50 cm-'/V). We tentatively assigned these bands to modes of water molecules present in the Helmholtz layer.