UNIGE document Scientific Article
previous document  unige:14687  next document
add to browser collection

Modulation Excitation PM-IRRAS: A New Possibility for Simultaneous Monitoring of Surface and Gas Species and Surface Properties

Urakawa, Atsushi
Baiker, Alfons
Published in Chimia. 2006, vol. 60, no. 4, p. 231-233
Abstract Polarization-modulation infrared reflection-absorption spectroscopy (Pm-irras) is a sensitive tool for the analysis of species residing at gas-solid and gas-liquid interfaces. the polarization-modulation allows excellent back-ground compensation and the analysis of surface/interface species under moderate pressure (e.g. atmospheric pressure of ir-absorbing gases) is possible. we demonstrate a new possibility to extract simultaneously information of gas and solid phases in addition to surface species from the Pm-irras experiments, using co oxidation over Pt film as an example. modulation excitation spectroscopy (mes) has been combined with this technique to enhance the sensitivity and to analyze the kinetic behavior of species. the surface species involved in the oxidation process, the state of Pt, and the gas phase species (co and co2) could be simultaneously monitored in situ and analyzed quantitatively. the technique can serve as a valuable tool for investigations of various dynamic phenomena occurring at gas-solid interfaces.
Keywords Co oxidationFas-solid interfaceIn situ spectroscopyModulation excitation spectroscopyPm-irras
Stable URL https://archive-ouverte.unige.ch/unige:14687
Full text
Article - document accessible for UNIGE members only Limited access to UNIGE

257 hits

1 download


Deposited on : 2011-03-18

Export document
Format :
Citation style :