Volume 162, 2013
From the journal:

Faraday Discussions

Preparation and structure of a single Au atom on the TiO2(110) surface: control of the Au–metal oxide surface interaction

Kiyotaka Asakura,*a   Satoru Takakusagi,a   Hiroko Ariga,a   Wang-Jae Chun,b   Shushi Suzuki,c   Yuichiro Koike,a   Hiromitsu Uehara,a   Kotaro Miyazakia  and  Yasuhiro Iwasawad  

* Corresponding authors

a Catalysis Research Center, Hokkaido University Kita 21-10, Kita Sapporo 001-0021, Japan
E-mail: askr@cat.hokudai.ac.jp
Fax: +81-11-706-9113
Tel: +81-11-706-9113

b Graduate School of Arts and Sciences, International Christian University, Mitaka, Tokyo 181-8585, Japan
E-mail: wchun@icu.ac.jp
Fax: +81-422-33-1449
Tel: +81-422-33-3293

c Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
E-mail: shushi@apchem.nagoya-u.ac.jp
Fax: +81- 52-789-5299
Tel: +052-789-5299

d Innovation Research Center for Fuel Cells, Department of Engineering Science, Graduate School of Information Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
E-mail: iwasawa@pc.uec.ac.jp
Fax: +81-(0)42-443-5483
Tel: +81-(0)42-443-5921

Abstract

Three-dimensional Au structures on bare and organic-compound-modified TiO2(110) surfaces were interrogated by Au L3-edge polarization dependent total reflection fluorescence X-ray absorption fine structure (PTRF-XAFS) spectroscopy. On the bare TiO2(110) surface, icosahedral Au55 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.

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/C2FD20131C
Article type
Paper
Submitted
23 Nov 2012
Accepted
12 Dec 2012
First published
18 Dec 2012

Faraday Discuss., 2013,162, 165-177

Permissions

Request permissions

Preparation and structure of a single Au atom on the TiO2(110) surface: control of the Au–metal oxide surface interaction

K. Asakura, S. Takakusagi, H. Ariga, W. Chun, S. Suzuki, Y. Koike, H. Uehara, K. Miyazaki and Y. Iwasawa, Faraday Discuss., 2013, 162, 165 DOI: 10.1039/C2FD20131C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements