A stable pure hydroxyl layer on Pt[110]-(1x2)

Title: A stable pure hydroxyl layer on Pt[110]-(1x2)
Creator: Shavorskiy, A.; Eralp, T.; Gladys, M. J.; Held, G.
Relation: Journal of Physical Chemistry C Vol. 113, Issue 52, p. 21755-21764
Publisher Link: http://dx.doi.org/10.1021/jp907424w
Publisher: American Chemical Society
Resource Type: journal article
Date: 2009
Description: The adsorption of water and coadsorption with oxygen on the missing-row reconstructed Pt{110}-(1×2) surface was studied by using temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy. Coadsorbed oxygen below saturation (<0.65 ± 0.05 ML) leads to the formation of OH, which occupies sites near the ridge Pt atoms. In contrast to the more closely packed Pt{111} surface, OH appears not to form hydrogen bonds with coadsorbed water molecules and is stable after the desorption of water up to about 205 K (as determined by TPD). Because OH and atomic oxygen compete for adsorption sites, water dissociation is only observed for oxygen coverages below saturation. In the absence of coadsorbed oxygen, water stays intact at all temperatures and forms a strongly bound layer of 2 ML coverage on the clean Pt{110}-(1×2) surface at temperatures between 140 and 175 K.
Subject: hydroxyl layer; desorption; coadsorption; oxygen
Identifier: http://hdl.handle.net/1959.13/916922
Identifier: uon:8152
Identifier: ISSN:1932-7447
Language: eng
Reviewed

		Thumbnail	File	Description	Size	Format