Surface reaction studies of water and oxygen with polycrystalline Ni3Fe: Evidence of water dissociation to produce hydrogen and its suppression by oxygen coadsorption

W. J. Chia; Y. W. Chung

doi:10.1016/0966-9795(95)00049-6

Surface reaction studies of water and oxygen with polycrystalline Ni₃Fe: Evidence of water dissociation to produce hydrogen and its suppression by oxygen coadsorption

W. J. Chia^*, Y. W. Chung

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The interaction of water vapor and oxygen with polycrystalline Ni₃Fe has been studied by Auger electron spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermal desorption. Water adsorbs molecularly on the surface at or below 150 K. Between 150 and 200 K, some adsorbed water molecules desorb in vacuum, while others dissociate into hydroxyls, atomic oxygen, and hydrogen. XPS studies suggest iron to be the active species in controlling the dissociation of water on polycrystalline Ni₃Fe surface. Water dissociation into atomic hydrogen is greatly suppressed by the presence of small concentrations of oxygen in water vapor.

Original language	English (US)
Pages (from-to)	283-288
Number of pages	6
Journal	Intermetallics
Volume	4
Issue number	4
DOIs	https://doi.org/10.1016/0966-9795(95)00049-6
State	Published - 1996

Keywords

A. Model systems
B. Environmental embrittlement
B. Hydrogen embrittlements

ASJC Scopus subject areas

Chemistry(all)
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0966-9795(95)00049-6

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title = "Surface reaction studies of water and oxygen with polycrystalline Ni3Fe: Evidence of water dissociation to produce hydrogen and its suppression by oxygen coadsorption",

abstract = "The interaction of water vapor and oxygen with polycrystalline Ni3Fe has been studied by Auger electron spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermal desorption. Water adsorbs molecularly on the surface at or below 150 K. Between 150 and 200 K, some adsorbed water molecules desorb in vacuum, while others dissociate into hydroxyls, atomic oxygen, and hydrogen. XPS studies suggest iron to be the active species in controlling the dissociation of water on polycrystalline Ni3Fe surface. Water dissociation into atomic hydrogen is greatly suppressed by the presence of small concentrations of oxygen in water vapor.",

keywords = "A. Model systems, B. Environmental embrittlement, B. Hydrogen embrittlements",

author = "Chia, {W. J.} and Chung, {Y. W.}",

note = "Funding Information: The authors wish to thank Dr C. T. Liu of Oak Ridge National Laboratoryf or supplyingt he Ni,Fe alloy. This work was supported by the National ScienceF oundation, Grant No. DMR 9410701.",

year = "1996",

doi = "10.1016/0966-9795(95)00049-6",

language = "English (US)",

volume = "4",

pages = "283--288",

journal = "Intermetallics",

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TY - JOUR

T1 - Surface reaction studies of water and oxygen with polycrystalline Ni3Fe

T2 - Evidence of water dissociation to produce hydrogen and its suppression by oxygen coadsorption

AU - Chia, W. J.

AU - Chung, Y. W.

N1 - Funding Information: The authors wish to thank Dr C. T. Liu of Oak Ridge National Laboratoryf or supplyingt he Ni,Fe alloy. This work was supported by the National ScienceF oundation, Grant No. DMR 9410701.

PY - 1996

Y1 - 1996

N2 - The interaction of water vapor and oxygen with polycrystalline Ni3Fe has been studied by Auger electron spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermal desorption. Water adsorbs molecularly on the surface at or below 150 K. Between 150 and 200 K, some adsorbed water molecules desorb in vacuum, while others dissociate into hydroxyls, atomic oxygen, and hydrogen. XPS studies suggest iron to be the active species in controlling the dissociation of water on polycrystalline Ni3Fe surface. Water dissociation into atomic hydrogen is greatly suppressed by the presence of small concentrations of oxygen in water vapor.

AB - The interaction of water vapor and oxygen with polycrystalline Ni3Fe has been studied by Auger electron spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermal desorption. Water adsorbs molecularly on the surface at or below 150 K. Between 150 and 200 K, some adsorbed water molecules desorb in vacuum, while others dissociate into hydroxyls, atomic oxygen, and hydrogen. XPS studies suggest iron to be the active species in controlling the dissociation of water on polycrystalline Ni3Fe surface. Water dissociation into atomic hydrogen is greatly suppressed by the presence of small concentrations of oxygen in water vapor.

KW - A. Model systems

KW - B. Environmental embrittlement

KW - B. Hydrogen embrittlements

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