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Potential-dependent structure of the interfacial water on the gold electrode

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Title: Potential-dependent structure of the interfacial water on the gold electrode
Authors: Nihonyanagia, Satoshi Browse this author
Yea, Shen Browse this author →KAKEN DB
Uosaki, Kohei Browse this author
Dreesen, Laurrent Browse this author
Humbert, Christphe Browse this author
Thiry, Paul Browse this author
Peremans, Andre Browse this author
Keywords: Sum frequency generation
Electrochemical methods
Surface structure, morphology, roughness, and topography
Metal–electrolyte interfaces
Issue Date: 1-Dec-2004
Publisher: Elsevier
Journal Title: Surface Science
Volume: 573
Issue: 1
Start Page: 11
End Page: 16
Publisher DOI: 10.1016/j.susc.2004.04.059
Abstract: Doubly tunable sum frequency generation (SFG) spectra demonstrate that the water molecules at gold/electrolyte interface change their orientation with applied potential. At negative potentials, water molecules in the double layer align with their oxygen atom pointing to the solution. As potential became positive to be close to the potential of zero charge (PZC), the SFG signal decreased, suggesting the OH groups of the water molecule are either in random orientation or parallel to the electrode. As potential became more positive than the PZC, the SFG signal increased again with the oxygen-up orientation as same as in the negative potential region, indicating that water molecules interact with the adsorbed sulfate anions. The peak position of the SFG spectra indicates a relatively disordered state of water molecules at the gold electrode surface, in contrast to the previously observed ice-like structure of water at electrolyte/oxide interfaces.
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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