Characterization of coadsorbed H2O/HClO4 on Au(111) by X-ray photoelectron spectroscopy

F. P. Coenen; M. Kästner; G. Pirug; H. P. Bonzel; U. Stimming

doi:10.1021/j100083a023

Characterization of coadsorbed H₂O/HClO₄ on Au(111) by X-ray photoelectron spectroscopy

F. P. Coenen, M. Kästner, G. Pirug, H. P. Bonzel, U. Stimming

Forschungszentrum Jülich (FZJ)

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Abstract

Adsorbed layers of H₂O and HClO₄ on Au( 111 ) are prepared at various temperatures under vacuum conditions and analyzed by X-ray photoelectron spectroscopy (XPS). Total coverages are in the range of (1-3) × 10¹⁵ cm^-2. Nonequilibrated layers obtained at 80 K by a sequential adsorption of H₂O and HClO₄ (or vice versa) exhibit different O1s and C12p binding energies and desorption characteristics ("layering"). Low O1s binding energies indicate direct interaction of oxygen lone pair orbitals of ClO₄^- with surface orbitals of Au. In light of these O1s binding energies, ClO₄^- ions interacting with the Au(111) surface are likely to exist for equilibrated mixed layers with molecule ratios [H₂O]/[HClO₄] below 7.

Original language	English
Pages (from-to)	7885-7890
Number of pages	6
Journal	Journal of Physical Chemistry
Volume	98
Issue number	32
DOIs	https://doi.org/10.1021/j100083a023
State	Published - 1994
Externally published	Yes

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title = "Characterization of coadsorbed H2O/HClO4 on Au(111) by X-ray photoelectron spectroscopy",

abstract = "Adsorbed layers of H2O and HClO4 on Au( 111 ) are prepared at various temperatures under vacuum conditions and analyzed by X-ray photoelectron spectroscopy (XPS). Total coverages are in the range of (1-3) × 1015 cm-2. Nonequilibrated layers obtained at 80 K by a sequential adsorption of H2O and HClO4 (or vice versa) exhibit different O1s and C12p binding energies and desorption characteristics ({"}layering{"}). Low O1s binding energies indicate direct interaction of oxygen lone pair orbitals of ClO4- with surface orbitals of Au. In light of these O1s binding energies, ClO4- ions interacting with the Au(111) surface are likely to exist for equilibrated mixed layers with molecule ratios [H2O]/[HClO4] below 7.",

author = "Coenen, {F. P.} and M. K{\"a}stner and G. Pirug and Bonzel, {H. P.} and U. Stimming",

year = "1994",

doi = "10.1021/j100083a023",

language = "English",

volume = "98",

pages = "7885--7890",

journal = "Journal of Physical Chemistry",

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TY - JOUR

T1 - Characterization of coadsorbed H2O/HClO4 on Au(111) by X-ray photoelectron spectroscopy

AU - Coenen, F. P.

AU - Kästner, M.

AU - Pirug, G.

AU - Bonzel, H. P.

AU - Stimming, U.

PY - 1994

Y1 - 1994

N2 - Adsorbed layers of H2O and HClO4 on Au( 111 ) are prepared at various temperatures under vacuum conditions and analyzed by X-ray photoelectron spectroscopy (XPS). Total coverages are in the range of (1-3) × 1015 cm-2. Nonequilibrated layers obtained at 80 K by a sequential adsorption of H2O and HClO4 (or vice versa) exhibit different O1s and C12p binding energies and desorption characteristics ("layering"). Low O1s binding energies indicate direct interaction of oxygen lone pair orbitals of ClO4- with surface orbitals of Au. In light of these O1s binding energies, ClO4- ions interacting with the Au(111) surface are likely to exist for equilibrated mixed layers with molecule ratios [H2O]/[HClO4] below 7.

AB - Adsorbed layers of H2O and HClO4 on Au( 111 ) are prepared at various temperatures under vacuum conditions and analyzed by X-ray photoelectron spectroscopy (XPS). Total coverages are in the range of (1-3) × 1015 cm-2. Nonequilibrated layers obtained at 80 K by a sequential adsorption of H2O and HClO4 (or vice versa) exhibit different O1s and C12p binding energies and desorption characteristics ("layering"). Low O1s binding energies indicate direct interaction of oxygen lone pair orbitals of ClO4- with surface orbitals of Au. In light of these O1s binding energies, ClO4- ions interacting with the Au(111) surface are likely to exist for equilibrated mixed layers with molecule ratios [H2O]/[HClO4] below 7.

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DO - 10.1021/j100083a023

M3 - Article

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JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

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ER -

Characterization of coadsorbed H₂O/HClO₄ on Au(111) by X-ray photoelectron spectroscopy

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