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Title: In-situ X-ray photoelectron spectroscopy studies of water on metals and oxides at ambient conditions

Abstract

X-ray photoelectron spectroscopy (XPS) is a powerful tool for surface and interface analysis, providing the elemental composition of surfaces and the local chemical environment of adsorbed species. Conventional XPS experiments have been limited to ultrahigh vacuum (UHV) conditions due to a short mean free path of electrons in a gas phase. The recent advances in instrumentation coupled with third-generation synchrotron radiation sources enables in-situ XPS measurements at pressures above 5 Torr. In this review, we describe the basic design of the ambient pressure XPS setup that combines differential pumping with an electrostatic focusing. We present examples of the application of in-situ XPS to studies of water adsorption on the surface of metals and oxides including Cu(110), Cu(111), TiO2(110) under environmental conditions of water vapor pressure. On all these surfaces we observe a general trend where hydroxyl groups form first, followed by molecular water adsorption. The importance of surface OH groups and their hydrogen bonding to water molecules in water adsorption on surfaces is discussed in detail.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Materials Sciences Division
OSTI Identifier:
927886
Report Number(s):
LBNL-205E
TRN: US0804745
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Journal of Physics: Condensed Matter
Additional Journal Information:
Journal Volume: 20
Country of Publication:
United States
Language:
English
Subject:
36; ADSORPTION; BONDING; DESIGN; ELECTRONS; ELECTROSTATICS; FOCUSING; HYDROGEN; MEAN FREE PATH; OXIDES; PUMPING; SYNCHROTRON RADIATION SOURCES; WATER; WATER VAPOR; X-RAY PHOTOELECTRON SPECTROSCOPY; photoelectron spectroscopy XPS UHV

Citation Formats

Salmeron, Miquel, Yamamoto, S, Bluhm, H, Andersson, K, Ketteler, G, Ogasawara, H, Salmeron, M, and Nilsson, A. In-situ X-ray photoelectron spectroscopy studies of water on metals and oxides at ambient conditions. United States: N. p., 2007. Web.
Salmeron, Miquel, Yamamoto, S, Bluhm, H, Andersson, K, Ketteler, G, Ogasawara, H, Salmeron, M, & Nilsson, A. In-situ X-ray photoelectron spectroscopy studies of water on metals and oxides at ambient conditions. United States.
Salmeron, Miquel, Yamamoto, S, Bluhm, H, Andersson, K, Ketteler, G, Ogasawara, H, Salmeron, M, and Nilsson, A. 2007. "In-situ X-ray photoelectron spectroscopy studies of water on metals and oxides at ambient conditions". United States. https://www.osti.gov/servlets/purl/927886.
@article{osti_927886,
title = {In-situ X-ray photoelectron spectroscopy studies of water on metals and oxides at ambient conditions},
author = {Salmeron, Miquel and Yamamoto, S and Bluhm, H and Andersson, K and Ketteler, G and Ogasawara, H and Salmeron, M and Nilsson, A},
abstractNote = {X-ray photoelectron spectroscopy (XPS) is a powerful tool for surface and interface analysis, providing the elemental composition of surfaces and the local chemical environment of adsorbed species. Conventional XPS experiments have been limited to ultrahigh vacuum (UHV) conditions due to a short mean free path of electrons in a gas phase. The recent advances in instrumentation coupled with third-generation synchrotron radiation sources enables in-situ XPS measurements at pressures above 5 Torr. In this review, we describe the basic design of the ambient pressure XPS setup that combines differential pumping with an electrostatic focusing. We present examples of the application of in-situ XPS to studies of water adsorption on the surface of metals and oxides including Cu(110), Cu(111), TiO2(110) under environmental conditions of water vapor pressure. On all these surfaces we observe a general trend where hydroxyl groups form first, followed by molecular water adsorption. The importance of surface OH groups and their hydrogen bonding to water molecules in water adsorption on surfaces is discussed in detail.},
doi = {},
url = {https://www.osti.gov/biblio/927886}, journal = {Journal of Physics: Condensed Matter},
number = ,
volume = 20,
place = {United States},
year = {Mon Oct 29 00:00:00 EDT 2007},
month = {Mon Oct 29 00:00:00 EDT 2007}
}