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Hokkaido University Collection of Scholarly and Academic Papers >
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In Situ Electrochemical, Electrochemical Quartz Crystal Microbalance, Scanning Tunneling Microscopy, and Surface X-ray Scattering Studies on Ag/AgCl Reaction at the Underpotentially Deposited Ag Bilayer on the Au(111) Electrode Surface
| Title: | In Situ Electrochemical, Electrochemical Quartz Crystal Microbalance, Scanning Tunneling Microscopy, and Surface X-ray Scattering Studies on Ag/AgCl Reaction at the Underpotentially Deposited Ag Bilayer on the Au(111) Electrode Surface |
| Authors: | Uosaki, Kohei Browse this author →KAKEN DB | | Morita, Jun Browse this author | | Katsuzaki, Tomoko Browse this author | | Takakusagi, Satoru Browse this author | | Tamura, Kazuhisa Browse this author | | Takahasi, Masamitu Browse this author | | Mizuki, Jun'ichiro Browse this author | | Kondo, Toshihiro Browse this author |
| Issue Date: | 30-Jun-2011 |
| Publisher: | American Chemical Society |
| Journal Title: | Journal of Physical Chemistry C |
| Volume: | 115 |
| Issue: | 25 |
| Start Page: | 12471 |
| End Page: | 12482 |
| Publisher DOI: | 10.1021/jp2010502 |
| Abstract: | Ag/AgCl reaction at the Ag bilayer, which was underpotentially prepared on a Au(111) surface, was investigated using electrochemical quartz crystal microbalance (EQCM), scanning tunneling microscopy (STM), surface X-ray scattering (SXS), and electrochemical techniques. When the potential was scanned positively from -200 mV, the Cl^[-] ion was adsorbed on the Au(111) electrode surface around 0 mV, and then the phase transition of the adsorbed Cl^[-] ion layer from random orientation to (√3 x √3) structure took place at around +130 mV. The Ag bilayer and Cl^[-] ions were oxidatively reacted to form the AgCl monolayer with (√13 x √13)R13.9° structure around +200 mV, accompanied with the formation of AgCl monocrystalline clusters on the AgCl monolayer surface. The structure of the AgCl monolayer on the Au(111) surface was changed from (√13 x √13)R13.9° structure to (4 x 4) structure around +500 mV. When the potential was scanned back negatively, the AgCl monolayer was electrochemically reduced, and a Ag monolayer, not a bilayer, was formed on the Au(111) surface. In the subsequent potential cycles, the structural change between the Ag monolayer and the AgCl monolayer was reversibly observed. All oxidative structural changes were much slower than the reductive ones. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/50205 |
| 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)
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Submitter: 魚崎 浩平
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