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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

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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)

Submitter: 朝倉 清高

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