TY  - JOUR
AU  - Albertin, Stefano
AU  - Gustafson, J.
AU  - Zhou, J.
AU  - Pfaff, S.
AU  - Shipilin, M.
AU  - Blomberg, S.
AU  - Merte, L. R.
AU  - Gutowski, Olof
AU  - Dippel, A-C
AU  - Zetterberg, J.
AU  - Lundgren, E.
AU  - Hejral, Uta
TI  - Surface optical reflectance combined with x-ray techniques during gas-surface interactions
JO  - Journal of physics / D
VL  - 53
IS  - 22
SN  - 1361-6463
CY  - Bristol
PB  - IOP Publ.
M1  - PUBDB-2021-00469
M1  - arXiv:2001.03062
SP  - 224001
PY  - 2020
AB  - High energy surface x-ray diffraction (HESXRD), x-ray reflectivity (XRR), mass spectrometry (MS) and surface optical reflectance (SOR) have been combined to simultaneously obtain sub-second information on the surface structure and morphology from a Pd(100) model catalyst during in situ oxidation at elevated temperatures and pressures resulting in Pd bulk oxide formation. The results show a strong correlation between the HESXRD and SOR signal intensities during the experiment, enabling phase determination and a time-resolved thickness estimation of the oxide by HESXRD, complemented by XRR measurements. The experiments show a remarkable sensitivity of the SOR to changes in the surface phase and morphology, in particular to the initial stages of oxidation/reduction. The data imply that SOR can detect the formation of an ultrathin PdO surface oxide layer of only 2–3 Å thickness.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000523432900001
DO  - DOI:10.1088/1361-6463/ab77df
UR  - https://bib-pubdb1.desy.de/record/454395
ER  -