%0 Journal Article
%A Albertin, Stefano
%A Gustafson, J.
%A Zhou, J.
%A Pfaff, S.
%A Shipilin, M.
%A Blomberg, S.
%A Merte, L. R.
%A Gutowski, Olof
%A Dippel, A-C
%A Zetterberg, J.
%A Lundgren, E.
%A Hejral, Uta
%T Surface optical reflectance combined with x-ray techniques during gas-surface interactions
%J Journal of physics / D
%V 53
%N 22
%@ 1361-6463
%C Bristol
%I IOP Publ.
%M PUBDB-2021-00469
%M arXiv:2001.03062
%P 224001
%D 2020
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000523432900001
%R 10.1088/1361-6463/ab77df
%U https://bib-pubdb1.desy.de/record/454395