Kinetic passivation of steps with sulfur and CO/S site exchange processes on stepped Pt surfaces
Streber R, Papp C, Lorenz MPA, Bayer A, Denecke R, Steinrück HP (2008)
Publication Type: Journal article, Original article
Publication year: 2008
Journal
Original Authors: Streber R., Papp C., Lorenz M.P.A., Bayer A., Denecke R., Steinrück H.-P.
Publisher: Elsevier
Book Volume: 452
Pages Range: 94-98
DOI: 10.1016/j.cplett.2007.12.038
Abstract
We studied the influence of preadsorbed sulfur on the adsorption of CO on Pt(3 5 5) and Pt(3 2 2) by in situ X-ray photoelectron spectroscopy. At low temperatures, no adsorption of CO at steps is found, indicating a passivation by sulfur. Upon heating, population of step sites with CO occurs. This behavior is attributed to a kinetic passivation of the steps by sulfur at low temperatures, which is lifted upon heating. The characteristic transition temperatures of 185 K for Pt(3 5 5) and 240 K for Pt(3 2 2) are significantly different, due to a higher activation barrier for the CO/S site exchange process for Pt(3 2 2). © 2007 Elsevier B.V. All rights reserved.
Authors with CRIS profile
Regine Streber
Graduiertenzentrum der FAU
Christian Papp
Lehrstuhl für Physikalische Chemie II
Andreas Bayer
Lehrstuhl für Physikalische Chemie II
Hans-Peter Steinrück
Lehrstuhl für Physikalische Chemie II
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Streber, R., Papp, C., Lorenz, M.P.A., Bayer, A., Denecke, R., & Steinrück, H.-P. (2008). Kinetic passivation of steps with sulfur and CO/S site exchange processes on stepped Pt surfaces. Chemical Physics Letters, 452, 94-98. https://dx.doi.org/10.1016/j.cplett.2007.12.038
MLA:
Streber, Regine, et al. "Kinetic passivation of steps with sulfur and CO/S site exchange processes on stepped Pt surfaces." Chemical Physics Letters 452 (2008): 94-98.
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