Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/06

  • 研究者氏名
    Researcher Name

    山本達 Susumu YAMAMOTO
    准教授 Associate Professor
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    計測研究部門 放射光ナノ構造可視化研究分野
    Division of Measurements, Synchrotron Radiation Soft X-ray Microscopy
  • 研究キーワード
    Research Keywords

    Operando measurements
    Synchrotron radiation X-ray
    Surface chemistry
    Next-generation synchrotron radiation facility
Research Subject
Catalytic surface science opened by synchrotron radiation X-ray operando measurements

研究の背景 Background


Surfaces and interfaces of materials play important roles as reaction fields in the material and energy conversion processes such as catalysts/photocatalysts, fuel cells, lithium ion batteries. These reaction fields are usually in contact with gas atmospheres and liquids, and it has been difficult to directly observe them using conventional surface science techniques in ultrahigh vacuum. Recently, “operand” measurements, which can directly study the reaction field under the reaction, are developing rapidly.

研究の目標 Outcome


My research theme is "operando observation of molecules and photo-excited carriers on catalyst surfaces/interfaces" using various light sources such as synchrotron radiation X-rays, infrared light, and ultrashort lasers. I aim to develop a novel operando measurement method that utilizes the high-brilliant synchrotron radiation X-rays at the "next-generation synchrotron radiation facility", and to elucidate the mechanism of function expression not only in model systems but also in practical materials.

研究図Research Figure

Fig.1. Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) system developed at SPring-8 BL07LSU.Fig.2. Different wetting behavior of water on two Cu surfaces revealed by O 1s AP-XPS spectra. (p(H2O)= 1 Torr, T= 295 K)Fig.3. Photocatalytic activity of TiO2 surfaces is positively correlated with the lifetime of photo-excited carriers, which was experimentally determined by time-resolved XPS.

文献 / Publications

[1] e-J. Surf. Sci. Nanotechnol. 17, 130-147 (2019). [2] Phys. Chem. Chem. Phys. 20, 19532-19538 (2018). [3] J. Synchrotron Rad. 21, 352-365 (2014). [4] J. Phys. Soc. Jpn. 82, 021003 (2013). [5] Rev. Sci. Instrum. 83, 023109 (2012). [6] J. Phys. Chem. C (Letters) 111, 7848-7850 (2007).