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Electrodeposition of Ag and Pd on a reconstructed Au(111) electrode surface studied by in situ scanning tunneling microscopy

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Title: Electrodeposition of Ag and Pd on a reconstructed Au(111) electrode surface studied by in situ scanning tunneling microscopy
Authors: Takakusagi, Satoru Browse this author →KAKEN DB
Kitamura, Ken Browse this author
Uosaki, Kohei Browse this author
Keywords: Ag
Pd
Au(111)
electrodeposition
surface reconstruction
STM
Issue Date: 1-Sep-2009
Publisher: Elsevier Ltd.
Journal Title: Electrochimica Acta
Volume: 54
Issue: 22
Start Page: 5137
End Page: 5141
Publisher DOI: 10.1016/j.electacta.2009.04.014
Abstract: Electrochemical deposition of Ag and potential-induced structural change of the deposited Ag layer on a 23 x √3 reconstructed surface of Au(111) electrode were followed by in situ scanning tunneling microscope (STM). A uniform Ag monolayer was formed on a reconstructed Au(111) surface in a 50 mM H2SO4 solution at +0.3 V (vs. Ag/AgCl) after adding a solution containing Ag2SO4 so that the concentration of Ag+ in the STM cell became ca. 2 μM. No characteristic height corrugation such as the Au reconstruction was observed on the surface, indicating that the lifting of the substrate Au reconstruction occurred by Ag deposition. The formed Ag monolayer was converted to a net-like shaped Ag nano-pattern of biatomic height when the potential was stepped from +0.3 V to -0.2 V in the solution containing 2 μM Ag+. This result indicates that the substrate Au(111)-(1 x 1) surface was converted to the reconstructed surface even in the presence of Ag adlayer. Quite different structure was observed for Pd deposition on a reconstructed surface of Au(111) electrode at +0.3 V and the origin for this difference between Ag and Pd deposition are discussed.
Type: article (author version)
URI: http://hdl.handle.net/2115/39957
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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