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Basic Research on the Mechanism of Catalytic Activity of Metal/Oxide Nano-Hetero Interfaces

Research Project

Project/Area Number 16360319
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals
Research InstitutionNational Institute of Advanced Industrial Science and Technology (AIST)

Principal Investigator

KOHYAMA Masanori  National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Ubiquitous Energy Devices, Group Leader, ユビキタスエネルギー研究部門, グループ長 (60344157)

Co-Investigator(Kenkyū-buntansha) AKITA Tomoki  National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Ubiquitous Energy Devices, Research Scientist, ユビキタスエネルギー研究部門, 研究員 (80356344)
TANAKA Shingo  National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Ubiquitous Energy Devices, Research Scientist, ユビキタスエネルギー研究部門, 研究員 (50357448)
TANAKA Koji  National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Ubiquitous Energy Devices, Senior Research Scientist, ユビキタスエネルギー研究部門, 主任研究員 (40357439)
FUJITANI Tadahiro  National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Innovation in Sustainable Chemistry, Group Leader, 環境化学研究部門, グループ長 (50190054)
MAEDA Yasushi  National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Innovation in Sustainable Chemistry, Research Scientist, 環境化学研究部門, 研究員 (30357983)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2005: ¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 2004: ¥9,800,000 (Direct Cost: ¥9,800,000)
Keywordsmetal / oxide nano-hetero interfaces / gold nano particles / titanium oxide / electron microscopy observation / electron holography / scanning probe microscope / first-principles calculation / interface stoichiometry / ナノ触媒 / 走査トンネル顕微鏡
Research Abstract

In order to elucidate the mechanism of catalytic activity of metal/oxide interfaces such as gold catalysts, we have applied the three methods ; electron microscopy observation, scanning probe microscopy (SPM) observation, and ab initio calculation, closely combined to each other. For Au/TiO_2 interfaces, the SPM observation has shown that the reduced Ti-rich TiO_2 surfaces have stronger attractive interactions with Au atoms or clusters, which is consistent with ab initio calculations indicating that Ti-rich or O-rich TiO_2 surfaces can make stronger adhesion with Au layers than stoichiometric surfaces. By ab initio calculations, we have made comparison between the simulated scanning tunneling microscopy (STM) image and the experimental STM image for the Au adsorption on the reduced Ti-rich surface, and we have also examined Pt/TiO_2 and Ag/TiO_2 systems for comparison. By applying the electron holography through the electron microscope to Au/TiO_2 catalysts, we observed that the mean inner potential in Au clusters suddenly increases for the cluster sizes less than 2-4 nm. The dependence of this phenomenon on the methods of sample preparation has been examined, and it seems that the interface dipole associated with O-rich interfaces is important for the potential increase. In this way, it can be said that the interface stoichiometry is the key for the catalytic activity. About the Au/CeO_2 system with remarkable catalytic activity, we have found dynamic and reversible shape changes of Au clusters deposited on CeO_2 during the electron microscopy observation, in accordance with easy formation and ordering of O-vacancies by electron beams. During this phenomenon, we have observed that the interface layer itself is tightly attached to the CeO_2 surface, where the interface is supposed to be off-stoichiometric. In any case, the dynamical shape changes of deposited metal clusters according to the atmosphere should be closely concerned with the catalytic activity.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (35 results)

All 2006 2005 2004

All Journal Article (33 results) Book (2 results)

  • [Journal Article] Nanoscale Characterization of Pb/TiO_2 Catalysis and Ag/TiO_2 Catalysis by Electron Holography2006

    • Author(s)
      S.Ichikawa, T.Akita, K.Okazaki, K.Tanaka, M.Kohyama
    • Journal Title

      MRS Symposium Proceedings 900E

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Analytical TEM Observation of Au Nano-Particles on Cerium Oxide2006

    • Author(s)
      T.Akita, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      MRS Symposium Proceedings 900E

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 電子線ホログラフィー法のナノヘテロ触媒への応用2006

    • Author(s)
      市川聡, 秋田知樹, 田中孝治, 香山正憲
    • Journal Title

      顕微鏡 41

      Pages: 61-63

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Analytical TEM Observation of Au Nano-Particles on Cerium Oxide (accepted)2006

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      Catalysis Today

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study of Interaction Between Au and TiO_2(110) at Low Coverage (submitted)2006

    • Author(s)
      K.Okazaki-Maeda, Y.Maeda, Y.Morikawa, S.Tanaka, M.Kohyama
    • Journal Title

      Materials Transactions

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Electronic Structure of Ag and Adsorbed on TiO_2(110) Surfaces by First-Principle Calculations (submitted)2006

    • Author(s)
      K.Okazaki-Maeda, Y.Maeda, Y.Morikawa, S.Tanaka, M.Kohyama
    • Journal Title

      Materials Transactions

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Nanoscale Characterization of Pd/TiO_2 Catalysts and Ag/TiO_2 Catalysts by Electron Holography2006

    • Author(s)
      S.Ichikawa, T.Akita, K.Okazaki, K.Tanaka, M.Kohyama
    • Journal Title

      MRS Symposium Proceedings 900E

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Analytical TEM Observation of Au Nano-particles on Cerium Oxide2006

    • Author(s)
      T.Akita, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      MRS Symposium Proceedings 900E

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Application of Electron Holography to Gold Catalysts (in Japanese)2006

    • Author(s)
      S.Ichikawa, T.Akita, K.Tanaka, M.Kohyama
    • Journal Title

      Microscope (in Japanese) 41

      Pages: 61-63

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Analytical TEM Observation of Au Nano-Particles on Cerium Oxide2006

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      Catalysis Today (accepted)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study of Interaction Between Au and TiO_2(110) at Low Coverage2006

    • Author(s)
      K.Okazaki-Maeda, Y.Maeda, Y.Morikawa, S.Tanaka, M.Koyhama
    • Journal Title

      Materials Transactions (submitted)

    • NAID

      10019276598

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Electronic Structure of Ag and Au Adsorbed on TiO_2(110) Surfaces by First-Principle Calculations2006

    • Author(s)
      K.Okazaki-Maeda, Y.Maeda, Y.Morikawa, S.Tanaka, M.Koyhama
    • Journal Title

      Materials Transactions (submitted)

    • NAID

      10019276635

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Analytical TEM Observation of Au Nano-Particles on Cerium Oxide2006

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      Catalysis Today (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Electron Holographic Characterization of Nano-Hetero Interface Effect in Gold Catalysis2005

    • Author(s)
      S.Ichikawa, T.Akita, K.Okazaki, K.Tanaka, M.Kohyama
    • Journal Title

      MRS Symposium Proceedings 839

      Pages: 43-48

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] TEM Observation of Gold Nanoparticles Deposited on Cerium Oxide2005

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      Journal of Materials Science 40

      Pages: 3101-3106

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effects of Stoichiometry on Electronic of Au and Pt Supported on T1O_2(110)2005

    • Author(s)
      K.Okazaki, Y.Morikawa, S.Tanaka, K.Tanaka, M.Kohyama
    • Journal Title

      Journal of Materials Science 40

      Pages: 3075-3080

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] TEM Observations of Au and Ir Particles Supported on CeO_22005

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, S.Tsubota, M.Haruta
    • Journal Title

      Journal of Materials Science 54

      Pages: 81-85

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Electronic Structures of Au Supported on TiO_22005

    • Author(s)
      K.Okazaki, S.Ichikawa, Y.Maeda, M.Haruta, M.Kohyama
    • Journal Title

      Applied Catalysis A-General 291

      Pages: 45-54

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] First-Principles Calculations of Metal/Oxide Interfaces : Effects of Interface Stoichimetry2005

    • Author(s)
      M.Kohyama, S.Tanaka, K.Okazaki, R.Yang, Y.Morikawa
    • Journal Title

      Materials Science Forum 502

      Pages: 27-32

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Electron Holographic Characterization of Nano-Hetero Interface Effect in Gold Catalysts2005

    • Author(s)
      S.Ichikawa, T.Akita, K.Okazaki, K.Tanaka, M.Kohyama
    • Journal Title

      MRS Symposium Proceedings 839

      Pages: 43-48

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effects of Stoichiometry on Electronic States of Au and Pt Supported on TiO_2(110)2005

    • Author(s)
      K.Okazaki, Y.Morikawa, S.Tanaka, K.Tanaka, M.Kohyama
    • Journal Title

      Journal of Materials Science 40

      Pages: 3075-3080

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] TEM Observations of Au and Ir Particles Supported on CeO_22005

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, S.Tsubota, M.Haruta
    • Journal Title

      Journal of Electron Microscopy 54

      Pages: 81-85

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] First-Principles Calculations of Metal/Oxide Interfaces : Effects of Interface Stoichiometry2005

    • Author(s)
      M.Kohyama, S.Tanaka, K.Okazaki, R.Yang, Y.Morikawa
    • Journal Title

      Materials Science Forum 502

      Pages: 27-32

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] TEM Observation of Gold Nanoparticles Deposited in Cerium Oxide2005

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      Journal of Materials Science 40

      Pages: 3101-3101

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Electronic Structure of Au Supported on TiO_22005

    • Author(s)
      K.Okazaki, S.Ichikawa, Y.Maeda, M.Haruta, M.Kohyama
    • Journal Title

      Applied Catalysis A 291

      Pages: 45-45

    • Related Report
      2005 Annual Research Report
  • [Journal Article] TEM Observation of Au and Ir Particles Supported on CeO_22005

    • Author(s)
      T.Akita, M Okumura K.Tanaka, M.Kohyama, S.Tsubota, M.Haruta
    • Journal Title

      Journal of Electron Microscopy 54

      Pages: 81-81

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Analytical TEM Observation of Gold Nano-Particles on Cerium Oxide2005

    • Author(s)
      T.Akita, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      Materials Research Society Symposium Proceedings 900E

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Electron Holographic Characterization of Nano-Hetero Interface Effect in Gold Catalysts2005

    • Author(s)
      S.Ichikawa, T.Akita, K.Okazaki, K.Tanaka, M.Kohyama
    • Journal Title

      Materials Research Society Symposium Proceedings Vol.839

    • Related Report
      2004 Annual Research Report
  • [Journal Article] TEM Observation of Gold Nanoparticles Deposited on Cerium Oxide2005

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, M.Haruta
    • Journal Title

      Journal of Materials Science (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effects of Stoichiometry on Electronic States of Au and Pt Supported on TiO_2(110)2005

    • Author(s)
      K.Okazaki, Y.Morikawa, S.Tanaka, K.Tanaka, M.Kohyama
    • Journal Title

      Journal of Materials Science (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Electronic Structures of Au supported on TiO_22005

    • Author(s)
      K.Okazaki, S.Ichikawa, Y.Maeda, M.Haruta, M.Kohyama
    • Journal Title

      Applied Catalysis A (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] TEM Observation of Au and Ir Particles Supported on CeO_22005

    • Author(s)
      T.Akita, M.Okumura, K.Tanaka, M.Kohyama, S.Tsubota, M.Haruta
    • Journal Title

      Journal of Electron Microscopy (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Ab-initio Study of Metal/Oxide Nano-Hetero Interfaces : Effects of Interface Stoichiometry2004

    • Author(s)
      M.Kohyama, S.Tanaka, K.Okazaki, R.Yang
    • Journal Title

      Computational Modeling and Simulation of Materials, Part A : Advances in Science and Technology 42

      Pages: 429-440

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] 金ナノ粒子触媒の電子線ホログラフィー観察,「材料開発のための顕微鏡法と応用写真集」(日本金属学会編)2006

    • Author(s)
      市川聡, 秋田知樹, 田中孝治, 香山正憲
    • Total Pages
      1
    • Publisher
      日本金属学会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] 計算科学からの挑戦 : 金属/無機ナノヘテロ界面の機能設計に向けて,「ユビキタスエネルギーの最新技術」(境哲男, 小林哲彦監修)2006

    • Author(s)
      香山正憲, 田中真悟, 岡崎(前田)一行
    • Total Pages
      9
    • Publisher
      シーエムシー出版
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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