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SERS Observation of the Adsorption Behavior of O2, H2O, and SO2 on Silver Powder Surfaces at Nearly Real Environmental Conditions

Volume 43, Number 2 (Feb. 1989) Page 239-245

Matsuta, Hideyuki; Hirokawa, Kichinosuke

The interaction of O2, H2O, and SO2 on silver powder prepared from the reduction of AgNO3 by NaBH4 was studied by surface-enhanced Raman scattering (SERS) at room temperature. The presence of H2O of about 103 Pa and O2 of about 104-105 Pa was necessary for observation of SERS peaks of SO32- and SO42-. The superoxide ion O2- was observed under high partial pressure for O2 conditions. SERS peaks of atomic oxygen, superoxide ion O2-, SO32-, and SO42- disappeared on evacuation. SERS peaks of surface species such as Ag2O did not disappear on evacuation.