Kuch, Wolfgang and Schulze, Mathias and Schnurnberger, Werner and Bolwin, Klaus (1993) XPS Lineshape Analysis of Potassium Coadsorbed with Water on Ni(111). Surface Science (287/288), pp. 600-604. Elsevier Science Publishers B.V.. ISSN 0039-6028/93/$06.00.
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Abstract
The line profiles of XP spectra of H2O/K/Ni(111) were investigated for K submonolayer coverages. The K2p spectra exhibit a strong alteration of lineshape with increasing water coverage. Without coadsorbed water a significant asymmetry was found which decreased rapidly and independently of the potassium precoverage with increasing water exposure up to ΘH2O = 0.7. The asymmetry observed in the K2p spectra is assigned to a coupling of the potassium adatoms to the electronic structure of the nickel substrate. The coadsorption of water suppresses this mechanism via a loosening of the potassium-nickel coupling. Since the decrease of asymmetry is independent of the potassium coverage, it is concluded that this process is due to an adsorbate-substrate interaction between the water and the nickel substrate only. This contradicts models in which the coadsorption of water and potassium on metal substrates is manifested in hydration of the potassium adatoms.
Item URL in elib: | https://elib.dlr.de/46195/ | ||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||
Title: | XPS Lineshape Analysis of Potassium Coadsorbed with Water on Ni(111) | ||||||||||||||||||||
Authors: |
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Date: | 1993 | ||||||||||||||||||||
Journal or Publication Title: | Surface Science | ||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||
Page Range: | pp. 600-604 | ||||||||||||||||||||
Publisher: | Elsevier Science Publishers B.V. | ||||||||||||||||||||
Series Name: | Surface Science | ||||||||||||||||||||
ISSN: | 0039-6028/93/$06.00 | ||||||||||||||||||||
Status: | Published | ||||||||||||||||||||
Keywords: | Ni(111), water adsorption, potassium adsorption | ||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||
HGF - Program: | Efficient Energy Conversion (old) | ||||||||||||||||||||
HGF - Program Themes: | E BZ - Fuel cells (old) | ||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||
DLR - Program: | E BZ - Fuel cells | ||||||||||||||||||||
DLR - Research theme (Project): | E - Membran-Brennstoffzellen (old) | ||||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Electrochemical Energy Technology | ||||||||||||||||||||
Deposited By: | Schulze, Dr.rer.nat. Mathias | ||||||||||||||||||||
Deposited On: | 12 Dec 2006 | ||||||||||||||||||||
Last Modified: | 27 Apr 2009 13:20 |
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