Chemical composition and reactivity of water on clean and oxygen-covered Pd{111}
(2008) In Surface Science 602(22). p.3540-3549- Abstract
- The chemical composition and dissociation behaviour of water adsorbed on clean and oxygen pre-covered Pd{111} was studied using high-resolution time-resolved and temperature-programmed X-ray photoelectron spectroscopy. We find that water remains intact at all temperatures up to desorption on the clean surface and at high oxygen coverage(0.69 ML) when a surface oxide is formed. The highest desorption peaks occur at 163 K from the clean surface and at 172 K from the surface oxide. At the intermediate coverage of 0.20 ML oxygen reacts with coadsorbed water at 155 K, to generate a mixed H2O/OH layer exhibiting a (root 3- x root 3)R30 degrees diffraction pattern, which is stable up to 177 K. The measured ratio between intact water and the... (More)
- The chemical composition and dissociation behaviour of water adsorbed on clean and oxygen pre-covered Pd{111} was studied using high-resolution time-resolved and temperature-programmed X-ray photoelectron spectroscopy. We find that water remains intact at all temperatures up to desorption on the clean surface and at high oxygen coverage(0.69 ML) when a surface oxide is formed. The highest desorption peaks occur at 163 K from the clean surface and at 172 K from the surface oxide. At the intermediate coverage of 0.20 ML oxygen reacts with coadsorbed water at 155 K, to generate a mixed H2O/OH layer exhibiting a (root 3- x root 3)R30 degrees diffraction pattern, which is stable up to 177 K. The measured ratio between intact water and the hydroxyl species in this layer varies between 1.5 and 2 depending on temperature. (C) 2008 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1304373
- author
- Gladys, M. J. ; El Zein, A. A. ; Mikkelsen, Anders LU ; Andersen, Jesper N LU and Held, G.
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Photoelectron spectroscopy, Oxygen, Catalysis, Chemisorption, Water, Palladium
- in
- Surface Science
- volume
- 602
- issue
- 22
- pages
- 3540 - 3549
- publisher
- Elsevier
- external identifiers
-
- wos:000261361100014
- scopus:84954358504
- ISSN
- 0039-6028
- DOI
- 10.1016/j.susc.2008.09.031
- language
- English
- LU publication?
- yes
- id
- af8e0dfa-11fe-4246-b844-fcd7c437f39c (old id 1304373)
- date added to LUP
- 2016-04-01 13:57:30
- date last changed
- 2022-03-21 21:26:51
@article{af8e0dfa-11fe-4246-b844-fcd7c437f39c,
abstract = {{The chemical composition and dissociation behaviour of water adsorbed on clean and oxygen pre-covered Pd{111} was studied using high-resolution time-resolved and temperature-programmed X-ray photoelectron spectroscopy. We find that water remains intact at all temperatures up to desorption on the clean surface and at high oxygen coverage(0.69 ML) when a surface oxide is formed. The highest desorption peaks occur at 163 K from the clean surface and at 172 K from the surface oxide. At the intermediate coverage of 0.20 ML oxygen reacts with coadsorbed water at 155 K, to generate a mixed H2O/OH layer exhibiting a (root 3- x root 3)R30 degrees diffraction pattern, which is stable up to 177 K. The measured ratio between intact water and the hydroxyl species in this layer varies between 1.5 and 2 depending on temperature. (C) 2008 Elsevier B.V. All rights reserved.}},
author = {{Gladys, M. J. and El Zein, A. A. and Mikkelsen, Anders and Andersen, Jesper N and Held, G.}},
issn = {{0039-6028}},
keywords = {{Photoelectron spectroscopy; Oxygen; Catalysis; Chemisorption; Water; Palladium}},
language = {{eng}},
number = {{22}},
pages = {{3540--3549}},
publisher = {{Elsevier}},
series = {{Surface Science}},
title = {{Chemical composition and reactivity of water on clean and oxygen-covered Pd{111}}},
url = {{http://dx.doi.org/10.1016/j.susc.2008.09.031}},
doi = {{10.1016/j.susc.2008.09.031}},
volume = {{602}},
year = {{2008}},
}