TY - JOUR
T1 - SERS observation of the effects of pressure and water on the absorbed state of nitrogen dioxide on a silver powder surface
AU - Matsuta, Hideyuki
AU - Hirokawa, Kichinosuke
N1 - Funding Information:
The authors are grateful to Nissan Science Foundation for financial support. One of us (HM) would like to thank Professor Y. Nishina, Dr. N. Kuroda and Dr. Y. Sasaki for many useful discussions and Raman measurements, and Dr. M. Oku for preparing this paper.
PY - 1986/7/2
Y1 - 1986/7/2
N2 - The effects of pressure and water on the adsorbed state of nitrogen dioxide on silver powder produced from an aqueous solution of AgNO3 were studied by SERS. NO2 of 102 Pa was added to the silver powder in the sample chamber and then pressure was raised up to ∼105 Pa with dry Ar, N2 or O2. The observed surface species are NO3- and NO2- ions under atmospheric pressure. When the total pressure decreases, NO2- is transformed into NO3- and NO+. This reaction is reversible with the total pressure variation of dry gases regardless of kind. Once the silver powder adsorbing nitrogen oxides is exposed to moistened gas or air of ∼105 Pa, the reversible variation was interrupted, and NO3- and NO2- ions are observed on the silver surface.
AB - The effects of pressure and water on the adsorbed state of nitrogen dioxide on silver powder produced from an aqueous solution of AgNO3 were studied by SERS. NO2 of 102 Pa was added to the silver powder in the sample chamber and then pressure was raised up to ∼105 Pa with dry Ar, N2 or O2. The observed surface species are NO3- and NO2- ions under atmospheric pressure. When the total pressure decreases, NO2- is transformed into NO3- and NO+. This reaction is reversible with the total pressure variation of dry gases regardless of kind. Once the silver powder adsorbing nitrogen oxides is exposed to moistened gas or air of ∼105 Pa, the reversible variation was interrupted, and NO3- and NO2- ions are observed on the silver surface.
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U2 - 10.1016/0039-6028(86)90495-4
DO - 10.1016/0039-6028(86)90495-4
M3 - Article
AN - SCOPUS:0010149497
VL - 172
SP - L555-L560
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 3
ER -