Influence of steps on the adsorption and thermal evolution of SO2 on clean and oxygen precovered Pt surfaces

Journal article


Publication Details

Author(s): Streber R, Papp C, Lorenz MPA, Höfert O, Zhao W, Wickert S, Darlatt E, Bayer A, Denecke R, Steinrück HP
Journal: Journal of Physical Chemistry C
Publisher: American Chemical Society
Publication year: 2010
Volume: 114
Journal issue: 46
Pages range: 19734-19743
ISSN: 1932-7447
eISSN: 1932-7455


Abstract


We investigated the adsorption and reaction of SO on clean and oxygen precovered, flat, and regularly stepped Pt surfaces, Pt(111), Pt(322), and Pt(355) by in situ high resolution X-ray photoelectron spectroscopy. Induced by the steps and/or the coadsorbed oxygen, several new SO species are observed, in addition to the two known SO species on Pt(111). On all investigated surfaces, a hit and stick mechanism is found for the adsorption, and no diffusion from terrace to step sites occurs at low temperatures. For the oxygen free stepped surfaces, a higher reactivity toward SO dissociation/disproportionation is found compared to Pt(111). On all three oxygen precovered Pt surfaces some SO is already formed directly upon SO exposure at low temperatures. Heating of this mixed O/SO layers first results in oxidation of more SO to SO, and at higher temperatures in subsequent oxidation of SO to SO, which finally decomposes above 450 K. The different reactions show a significant influence of the steps. © 2010 American Chemical Society.


FAU Authors / FAU Editors

Bayer, Andreas Dr.
Lehrstuhl für Physikalische Chemie II
Höfert, Oliver
Lehrstuhl für Physikalische Chemie II
Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Streber, Regine
Graduiertenzentrum der FAU
Zhao, Wei
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions with authors

Universität Leipzig


Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Streber, R., Papp, C., Lorenz, M.P.A., Höfert, O., Zhao, W., Wickert, S.,... Steinrück, H.-P. (2010). Influence of steps on the adsorption and thermal evolution of SO2 on clean and oxygen precovered Pt surfaces. Journal of Physical Chemistry C, 114(46), 19734-19743. https://dx.doi.org/10.1021/jp105994f

MLA:
Streber, Regine, et al. "Influence of steps on the adsorption and thermal evolution of SO2 on clean and oxygen precovered Pt surfaces." Journal of Physical Chemistry C 114.46 (2010): 19734-19743.

BibTeX: 

Last updated on 2019-06-08 at 09:04