Speaker
Dr
Davide Ferri
(PSI)
Description
A spectroscopic cell has been commissioned and tested on solid catalysts at beamline SuperXAS that enables combination of quickEXAFS and DRIFT measurements in a novel geometry in a single experiment. Pt/Al2O3, Pd/Al2O3 and Pd/CZ were tested under pulsed conditions, CO vs. O2. Beside obtaining high quality EXAFS data, IR spectra of adsorbed species both on the support and on the metal nano-particles were obtained in the synchronous measurements, this potentially allowing for the direct comparison with structural information from EXAFS analysis. Further combination with a modulated excitation approach that is achieved by the pulsed experimental conditions enabled to massively enhance the sensitivity of quickEXAFS. Contributions related to adsorbed species, such as Pt-CO, Pt-H and Pd-CO could be isolated in the time-resolved quickEXAFS data.
Primary author
Dr
Gian Luca Chiarello
(Università di Milano)
Co-authors
Dr
Davide Ferri
(PSI)
Luca Quaroni
(Paul Scherrer Institut)
Dr
Maarten Nachtegaal
(Paul Scherrer Institut)
