In situ characterization by Raman and IR vibrational spectroscopies on a single instrument: DeNOx reaction over a Pd/?-Al2O3 catalystPresented at the International Congress on Operando Spectroscopy, Lunteren, The Netherlands, March 2?6, 2003.

For the first time, in situ Raman and FTIR measurements have been carried out on a single bench-top instrument to characterize an alumina-supported palladium during the catalytic DeNOx reaction. While IR spectroscopy gives access to dedicated information on the NOx adsorbed species, Raman spectroscopy is highly sensitive to the molecular structure modifications of the active phase and allows us to characterize the adsorbed species as well as their bonds with the support. The ability to monitor the very same reaction via both techniques in a quasi-simultaneous approach provides full and complementary vibrational information giving a better insight into the catalytic reaction.