Investigation of the electronic interaction between TiO2(1 1 0) surfaces and Au clusters by PES and STM

Taketoshi Minato; Tomofumi Susaki; Susumu Shiraki; Hiroyuki S. Kato; Maki Kawai; Ken Ichi Aika

doi:10.1016/j.susc.2004.06.047

Investigation of the electronic interaction between TiO₂(1 1 0) surfaces and Au clusters by PES and STM

Taketoshi Minato, Tomofumi Susaki, Susumu Shiraki, Hiroyuki S. Kato, Maki Kawai, Ken Ichi Aika

Research output: Contribution to journal › Conference article › peer-review

99 Citations (Scopus)

Abstract

The electronic interaction between TiO₂(110) surfaces and Au clusters has been investigated by photoelectron spectroscopy (PES) and scanning tunneling microscopy (STM) to elucidate the high catalytic activity of Au/TiO₂. With increasing Au amount, the shift of O 2p nonbonding peak towards the Fermi level and the decrease in the Ti 3d peak area were precisely observed in the valence band PES spectra of Au/TiO₂(110). These changes in the valence band structure are attributed to the electron transfer from the surface defects on TiO₂(110) into the Au clusters. At the low coverage region, the STM images consistently show that the Au clusters nucleate at the surface defects of TiO₂(110). Here, we discuss the electronic interaction between the Au clusters and the TiO₂ surface relating to the catalytic activity of Au clusters on surfaces.

Original language	English
Pages (from-to)	1012-1017
Number of pages	6
Journal	Surface Science
Volume	566-568
Issue number	1-3 PART 2
DOIs	https://doi.org/10.1016/j.susc.2004.06.047
Publication status	Published - 2004 Sep 20
Event	Proceedings of the 22nd European Conference on Surface Science - Prague, Czech Republic Duration: 2003 Sep 7 → 2003 Sep 12

Keywords

Catalysis
Gold
Photoelectron spectroscopy
Scanning tunneling microscopy
Surface defects
Titanium oxide

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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@article{5b6829a111224b8ca8ca290f7e6a22d4,

title = "Investigation of the electronic interaction between TiO2(1 1 0) surfaces and Au clusters by PES and STM",

abstract = "The electronic interaction between TiO2(110) surfaces and Au clusters has been investigated by photoelectron spectroscopy (PES) and scanning tunneling microscopy (STM) to elucidate the high catalytic activity of Au/TiO2. With increasing Au amount, the shift of O 2p nonbonding peak towards the Fermi level and the decrease in the Ti 3d peak area were precisely observed in the valence band PES spectra of Au/TiO2(110). These changes in the valence band structure are attributed to the electron transfer from the surface defects on TiO2(110) into the Au clusters. At the low coverage region, the STM images consistently show that the Au clusters nucleate at the surface defects of TiO2(110). Here, we discuss the electronic interaction between the Au clusters and the TiO2 surface relating to the catalytic activity of Au clusters on surfaces.",

keywords = "Catalysis, Gold, Photoelectron spectroscopy, Scanning tunneling microscopy, Surface defects, Titanium oxide",

author = "Taketoshi Minato and Tomofumi Susaki and Susumu Shiraki and Kato, {Hiroyuki S.} and Maki Kawai and Aika, {Ken Ichi}",

year = "2004",

month = sep,

day = "20",

doi = "10.1016/j.susc.2004.06.047",

language = "English",

volume = "566-568",

pages = "1012--1017",

journal = "Surface Science",

issn = "0039-6028",

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number = "1-3 PART 2",

note = "Proceedings of the 22nd European Conference on Surface Science ; Conference date: 07-09-2003 Through 12-09-2003",

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TY - JOUR

T1 - Investigation of the electronic interaction between TiO2(1 1 0) surfaces and Au clusters by PES and STM

AU - Minato, Taketoshi

AU - Susaki, Tomofumi

AU - Shiraki, Susumu

AU - Kato, Hiroyuki S.

AU - Kawai, Maki

AU - Aika, Ken Ichi

PY - 2004/9/20

Y1 - 2004/9/20

N2 - The electronic interaction between TiO2(110) surfaces and Au clusters has been investigated by photoelectron spectroscopy (PES) and scanning tunneling microscopy (STM) to elucidate the high catalytic activity of Au/TiO2. With increasing Au amount, the shift of O 2p nonbonding peak towards the Fermi level and the decrease in the Ti 3d peak area were precisely observed in the valence band PES spectra of Au/TiO2(110). These changes in the valence band structure are attributed to the electron transfer from the surface defects on TiO2(110) into the Au clusters. At the low coverage region, the STM images consistently show that the Au clusters nucleate at the surface defects of TiO2(110). Here, we discuss the electronic interaction between the Au clusters and the TiO2 surface relating to the catalytic activity of Au clusters on surfaces.

AB - The electronic interaction between TiO2(110) surfaces and Au clusters has been investigated by photoelectron spectroscopy (PES) and scanning tunneling microscopy (STM) to elucidate the high catalytic activity of Au/TiO2. With increasing Au amount, the shift of O 2p nonbonding peak towards the Fermi level and the decrease in the Ti 3d peak area were precisely observed in the valence band PES spectra of Au/TiO2(110). These changes in the valence band structure are attributed to the electron transfer from the surface defects on TiO2(110) into the Au clusters. At the low coverage region, the STM images consistently show that the Au clusters nucleate at the surface defects of TiO2(110). Here, we discuss the electronic interaction between the Au clusters and the TiO2 surface relating to the catalytic activity of Au clusters on surfaces.

KW - Catalysis

KW - Gold

KW - Photoelectron spectroscopy

KW - Scanning tunneling microscopy

KW - Surface defects

KW - Titanium oxide

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VL - 566-568

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JO - Surface Science

JF - Surface Science

SN - 0039-6028

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T2 - Proceedings of the 22nd European Conference on Surface Science

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