In situ structural study on underpotential deposition of Ag on Au(111) electrode using surface X-ray scattering technique

In situ surface X-ray scattering (SXS) measurements were carried out to study the structure of a Ag layer on a Au(111) electrode formed by underpotential deposition (upd) in sulfuric acid solution. Specular rod profiles showed that a monolayer of Ag was formed at a potential between the second and t...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2002-09, Vol.532 (1), p.201-205
Main Authors: Kondo, Toshihiro, Morita, Jun, Okamura, Masayuki, Saito, Toshiya, Uosaki, Kohei
Format: Article
Language:English
Subjects:
Ag on Au
Chemistry
Electrochemistry
Electrodeposition
Exact sciences and technology
General and physical chemistry
In situ surface X-ray scattering (SXS)
Study of interfaces
Underpotential deposition (UPD)
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Summary:In situ surface X-ray scattering (SXS) measurements were carried out to study the structure of a Ag layer on a Au(111) electrode formed by underpotential deposition (upd) in sulfuric acid solution. Specular rod profiles showed that a monolayer of Ag was formed at a potential between the second and third upd peaks, and a bilayer of Ag was formed at a potential between the third upd peak and bulk deposition. Non-specular rod profiles demonstrated that electrochemically deposited Ag atoms both in the first and second layers were situated at the threefold hollow cubic closest packing (ccp) site of the underlying Au and Ag layers, respectively.
ISSN:1572-6657
1873-2569
DOI:10.1016/S0022-0728(02)00705-2