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Preparation and structure of a single Au atom on the TiO2(110) surface : control of the Au-metal oxide surface interaction
| Title: | Preparation and structure of a single Au atom on the TiO2(110) surface : control of the Au-metal oxide surface interaction |
| Authors: | Asakura, Kiyotaka Browse this author →KAKEN DB | | Takakusagi, Satoru Browse this author | | Ariga, Hiroko Browse this author | | Chun, Wang-Jae Browse this author | | Suzuki, Shushi Browse this author | | Koike, Yuichiro Browse this author | | Uehara, Hiromitsu Browse this author | | Miyazaki, Kotaro Browse this author | | Iwasawa, Yasuhiro Browse this author |
| Issue Date: | 18-Dec-2012 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | Faraday Discussions |
| Volume: | 162 |
| Start Page: | 165 |
| End Page: | 177 |
| Publisher DOI: | 10.1039/c2fd20131c |
| Abstract: | Three-dimensional Au structures on bare and organic-compound-modified TiO2(110) surfaces were interrogated by Au L-3-edge polarization dependent total reflection fluorescence X-ray absorption fine structure (PTRF-XAFS) spectroscopy. On the bare TiO2(110) surface, icosahedral Au-55 nanoclusters were the main product found. When the surfaces were modified with ortho or meso mercaptobenzoic acid (o-MBA or m-MBA), Au was atomically dispersed. Sulfur atoms in the o- and m-MBA formed strong covalent bonds with Au to produce stable Au-MBA (o-and m-forms) surface complexes. On the other hand, only oxygen atoms on the surface did not make a strong enough interaction to stabilize the Au species. We discuss how the Au species formed on the modified TiO2(110) surface and the possibility to control the Au structure by the surface modification method. |
| Rights: | Faraday Discuss., 2012, 162, 165-177 - Reproduced by permission of The Royal Society of Chemistry (RSC) |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/54029 |
| Appears in Collections: | 触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 朝倉 清高
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