The formation of an OH-containing overlayer on Ni(100)

The OH-containing hexagonal compound on a Ni(100) surface formed under reaction of O 2 with H 2 has been studied using high resolution electron energy-loss spectroscopy (HREELS) and X-ray photoelectron spectroscopy (XPS). The proton of the hexagonal OH species originates from a hydrogen atom dissolv...

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Bibliographic Details
Published in:Surface science 1994-09, Vol.317 (1), p.109-116
Main Authors: Nakamura, Junji, Kazuta, Mayumi, Kawamura, Shinichi, Matsuo, Iwao, Uematsu, Takayoshi, Yamada, Taro, Tanaka, Ken-ichi
Format: Article
Language:English
Subjects:
Adsorption and desorption kinetics
evaporation and condensation
Applied sciences
Chemistry
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
General and physical chemistry
Metals. Metallurgy
Physics
Solid-fluid interfaces
Solid-gas interface
Surface physical chemistry
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:The OH-containing hexagonal compound on a Ni(100) surface formed under reaction of O 2 with H 2 has been studied using high resolution electron energy-loss spectroscopy (HREELS) and X-ray photoelectron spectroscopy (XPS). The proton of the hexagonal OH species originates from a hydrogen atom dissolved in the bulk of the nickel crystal. The O 1s spectrum of the hexagonal compound has two peaks at 529.6 and 531.5 eV which are attributed to NiO and OH, respectively. The results of angle-resolved XPS showed that a monolayer of the OH species is formed on one or two layers of NiO, and that the hexagonal LEED pattern is due to the OH arrangement on the surface. An island growth model for the formation of the hexagonal compound is proposed.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(94)90257-7