Carbon monoxide adsorption on alkali metal predosed silver surfaces

✍ Scribed by Kevin J. Maynard; Martin Moskovits

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 340 KB
• Volume: 142
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(87)80941-7

✦ Synopsis

Surface-enhanced Raman scattering (SERS) spectra of CO on potassium predosed silver surfaces show two bands at 757 and 1216 cm-' in addition to the usual CO stretching vibration at P 2 130 cm-'. The frequencies of both of these bands are sensitive to isotope exchange of both carbon and oxygen. These high1 anharmonic vibrations are most easily assignable to the K-O-C bend and O-C stretch of an O-bonded 1 : 1 complex between potassium and CO, although other structures cannot be ruled out. Results with Na and Cs in place of potassium show similar behaviour.