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Epitaxial growth of a palladium layer on an Au(100) electrode

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Title: Epitaxial growth of a palladium layer on an Au(100) electrode
Authors: Naohara, Hideo Browse this author
Ye, Shen Browse this author →KAKEN DB
Uosaki, Kohei Browse this author
Keywords: Au(100) electrodes
Epitaxial growth
Palladium layer
Issue Date: 8-Sep-1999
Publisher: Elsevier
Journal Title: Journal of Electroanalytical Chemistry
Volume: 473
Issue: 1-2
Start Page: 2
End Page: 9
Publisher DOI: 10.1016/S0022-0728(99)00083-2
Abstract: The electrochemical deposition process of palladium from a PdCl42− complex on an Au(100) substrate was investigated using in situ scanning tunneling microscopy (STM). The reactant, i.e. the PdCl42− complex, was found to adsorb on the Au(100) surface with an ordered structure in the potential region where neither a cathodic nor an anodic current flowed. The electrochemical deposition of palladium on the Au(100) proceeded at potentials more negative than 1.0 V. The electrodeposition of the first palladium layer started not only on the terrace but also on gold islands which were formed as a result of the lifting process of the reconstructed Au(100) surface and then proceeded two-dimensionally. The following palladium layer was found to grow mainly from the deposited palladium region on top of the gold islands. The shape of the gold island could be identified even after four palladium layers were deposited. The bulk and surface structures of the deposited palladium layer were characterized by X-ray diffraction (XRD) and the copper underpotential deposition (upd) reaction, respectively, and the formation of the Pd(100) phase with a (1×1) surface structure was confirmed.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 魚崎 浩平

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