Kondoh, Hiroshi

写真a

Affiliation

Faculty of Science and Technology, Department of Chemistry (Yagami)

Position

Professor

Related Websites

External Links

Career 【 Display / hide

  • 1990.04
    -
    1997.03

    通産省工業技術院, 化学技術研究所, 研究員

  • 1997.03
    -
    1998.03

    通産省工業技術院 , 物質工学工業技術研究所, 主任研究官

  • 1998.03
    -
    2002.03

    東京大学 , 大学院理学系研究科化学専攻, 専任講師

  • 2002.03
    -
    2006.05

    東京大学, 大学院理学系研究科化学専攻, 助教授

  • 2003.04
    -
    2004.03

    名古屋大学, 大学院工学研究科, 非常勤講師

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Academic Background 【 Display / hide

  • 1988.03

    The University of Tokyo, Faculty of Science, Department of Chmistry

    University, Graduated

  • 1990.03

    The University of Tokyo, Graduate School, Division of Science, Department of Chemsitry

    Graduate School, Completed, Master's course

Academic Degrees 【 Display / hide

  • D.Sc., The University of Tokyo, Dissertation, 1995.09

 

Research Areas 【 Display / hide

  • Nanotechnology/Materials / Fundamental physical chemistry (Physical Chemistry)

Research Keywords 【 Display / hide

  • Synchrotron Radiation Science

  • Surface Science

  • 触媒化学

Research Themes 【 Display / hide

  • Development of synchrotron-based technique to study dynamic phenomena at solid surfaces and its application, 

    1998
    -
    Present

 

Books 【 Display / hide

  • Foundation and Application of XAFS

    KONDOH Hiroshi, 講談社, 2017.07

    Scope: 5章5節、6節

  • XAFS Techniques for Catalysts, Nanomaterials, and Surfaces

    KONDOH Hiroshi, Springer International Publishing, Switzerland, 2016.10

    Scope: pp.365-382

  • ブルーバックス「すごいぞ!身の回りの表面科学」

    尾嶋正治 他, 講談社, 2015.10

  • Current Trends of Surface Science and Catalysis

    KONDOH Hiroshi, Springer, New-York, 2014.03

    Scope: Chapter 9

  • 現代表面科学シリーズ(全6巻)

    日本表面科学会編, 共立出版, 2013.10

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Papers 【 Display / hide

  • A newly designed compact CEY-XAFS cell in the soft X-ray region and its application to surface XAFS measurements under ambient-pressure conditions without photoinduced side effects

    Shimizu H., Toyoshima R., Isegawa K., Mase K., Nakamura J., Kondoh H.

    Physical Chemistry Chemical Physics (Physical Chemistry Chemical Physics)  24 ( 5 ) 2988 - 2996 2022.02

    ISSN  14639076

     View Summary

    We report a newly designed compact cell to measure XAFS spectra with the conversion electron yield (CEY) method in the soft X-ray region under ambient-pressure gas conditions. Secondary electrons generated from the gas and sample by collision of X-ray-absorption-induced Auger electrons are collected by a positively biased collector electrode to obtain XAFS spectra. It was confirmed that this cell is applicable to soft X-ray surface XAFS measurements for different types of materials such as insulating organic materials and metal oxides under 1 bar gas conditions. During the measurements, photoinduced side effects were observed; i.e. photoinduced degradation of organic materials and photoinduced reduction/oxidation of metal oxides. We found that these photoinduced side effects can be sufficiently suppressed by controlling the measuring conditions. The presented measuring approach will enable surface XAFS spectra to be obtained in the soft X-ray region for various types of functional materials under ambient-pressure working conditions. This journal is

  • Ligand effects on surface oxide at RhPd(100) alloy surfaces: A density functional theory calculation study

    Shirahata N., Toyoshima R., Yoshida M., Ueda K., Mase K., Mun B.S., Kondoh H.

    Surface Science (Surface Science)  716 2022.02

    ISSN  00396028

     View Summary

    Density functional theory calculations were applied to a study on ligand effects on a Pd surface oxide formed on RhPd(100) alloy surfaces. It was found that chemical composition of the topmost layer of alloy significantly influences on the electronic structure of the Pd surface oxide. Such interlayer ligand effects are originating from the Rh−O and Pd−O interactions between the topmost layer of alloy and the Pd surface oxide. These effects give rise to substantial changes in binding energies of adsorbates and could change catalytic activity depending on atomic fraction of the Rh−Pd alloy.

  • Assessing nickel oxide electrocatalysts incorporating diamines and having improved oxygen evolution activity using operando UV/visible and X-ray absorption spectroscopy

    Miura T., Tsunekawa S., Onishi S., Ina T., Wang K., Watanabe G., Hu C., Kondoh H., Kawai T., Yoshida M.

    Physical Chemistry Chemical Physics (Physical Chemistry Chemical Physics)  23 ( 40 ) 23280 - 23287 2021.10

    ISSN  14639076

     View Summary

    The electrolysis of water using renewable energy is a promising approach to developing a sustainable hydrogen-based economy. To improve the efficiency of this process, it will be necessary to develop highly active electrocatalysts that promote the oxygen evolution reaction (OER). In the present study, the OER activity of a nickel oxide electrocatalyst was dramatically improved following the addition of a diamine to the electrolyte solution during electrodeposition. Operando UV/vis absorption spectroscopy was used to assess a number of nickel catalysts containing various diamines and other organic compounds. The data indicate that Ni(ii) complexes were formed with the diamines during electrodeposition. Consequently, the catalytic activity of these materials was enhanced based on increased concentrations of active reaction sites for the OER process. Ni K-edge X-ray absorption spectra showed that these catalysts were composed of γ-NiOOH with a Ni3.6+ valence state. The coordination of the diamine molecules to the γ-NiOOH produced structural distortion that contributed to improved OER activity. This structural distortion is likely the most important factor in enhancing the OER activity of inorganic-organic composite catalysts.

  • In situ AP-XPS study on reduction of oxidized Rh catalysts under CO exposure and catalytic reaction conditions

    Toyoshima R., Ueda K., Koda Y., Kodama H., Sumida H., Mase K., Kondoh H.

    Journal of Physics D: Applied Physics (Journal of Physics D: Applied Physics)  54 ( 20 )  2021.05

    ISSN  00223727

     View Summary

    Reduction of oxidized Rh catalysts under carbon monoxide (CO) exposure and reaction conditions were studied by using ambient-pressure x-ray photoelectron spectroscopy. First, Rh powders pressed into a pellet were deeply oxidized and the reduction process under 100 mTorr CO environment was monitored in situ at different temperatures. The oxidized Rh surfaces are composed of Rh2O3 and RhO2, the latter of which is more segregated near the surface. Both oxide species are reduced simultaneously to the metallic state; kinetic analyses indicate that the activation energy of the reduction of the Rh oxides is 1.68 eV, which is a little larger than those for Pd oxides, probably due to a stronger Rh-O interaction. Reduction of oxidized Rh nano-particles deposited on SiO2 under two reaction conditions (CO + O2 and CO + NO + O2) was observed with increasing temperature. It was found that the reduction temperature shifts to the higher temperature in the presence of NO, even though the S-factors are almost the same. The NO molecule more strongly prevents the reduction of oxidized Rh catalyst compared to O2.

  • Formation and behavior of carbonates on Ag(110) in the presence of ethylene and oxygen

    Isegawa K., Ueda K., Amemiya K., Mase K., Kondoh H.

    Journal of Physical Chemistry C (Journal of Physical Chemistry C)  125 ( 17 ) 9032 - 9037 2021.05

    ISSN  19327447

     View Summary

    Intermediate species formed on Ag(110) surfaces under the presence of ethylene and oxygen in the sub-Torr pressure range were studied by near-ambient-pressure X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) measurements. Carbonates are clearly observed exclusively under an ethylene-rich condition (0.2 Torr ethylene and 0.04 Torr oxygen; ethylene/oxygen = 5) at a high temperature of 500 K or relatively low-temperature conditions (≤470 K) at an oxygen-rich gas ratio (ethylene/oxygen = 1/5). NEXAFS results support the formation of carbonates and indicate that the carbonates are adsorbed almost parallel to the Ag(110) surface. The carbonates coexist with surface oxides with different composition ratios depending on the ethylene/oxygen pressure ratio and surface temperature. From these results we propose that the carbonates are formed by reaction(s) between ethylene and oxygen on the Ag(110) surface.

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Papers, etc., Registered in KOARA 【 Display / hide

Reviews, Commentaries, etc. 【 Display / hide

  • In-situ Observations of Catalytic Surface Reactions with Soft X-rays under Working Conditions

    KONDOH Hiroshi

    J. Phys.: Condens. Matter (Institute of Physics)  27   083003(1) - 083003(15) 2015.02

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

  • In-situ observation of model catalysts under reaction conditions using x-ray core-level spectroscopy

    KONDOH Hiroshi

    Chem. Rec. (Wiley)  14 ( 5 ) 806 - 818 2014.08

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

Presentations 【 Display / hide

  • オペランド分光による触媒の動的挙動の観測

    KONDOH Hiroshi

    電気化学会第85回大会 (東京) , 

    2018.03

    Oral presentation (invited, special), 電気化学会

  • 触媒反応のオペランド計測

    KONDOH Hiroshi

    科学技術未来戦略ワークショップ「高度炭素・水素循環に資する革新的反応・分離のためのCxHyOz制御科学」 (東京) , 

    2017.11

    Oral presentation (invited, special), JST-CRDS

  • 作動する触媒を追う-分光観測を通して-

    KONDOH Hiroshi

    第57回オーロラセミナー (旭川) , 

    2017.07

    Oral presentation (invited, special), 触媒学会北海道支部

  • Operando Observations of Catalytic Reactions on Platinum Group Metal Surfaces with Near Ambient Pressure XPS

    KONDOH Hiroshi

    TIMS-CENIDE Joint Symposium on Nanoscience and Nanotechnology (Tsukuba, Japan) , 

    2017.03

    Oral presentation (invited, special), TIMS, Tsukuba University

  • オペランド観測と触媒開発-見ると造るが1 つになる時代へ-

    KONDOH Hiroshi

    触媒学会界面分子変換研究会・日本表面科学会触媒表面科学研究部会合同ワークショップ (東京都・文京区) , 

    2017.03

    Oral presentation (invited, special), 触媒学会界面分子変換研究会・日本表面科学会触媒表面科学研究部会

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • Development of ambient-pressure ultrasoft x-ray surface XAFS and application to operando observation of catalytic reactions under ambient pressure conditions

    2018.06
    -
    2020.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Challenging Research (Exploratory) , Principal investigator

  • Mechanistic Study on catalytic reaction by combination of soft-x-ray and infrared operando spectroscopy

    2014.04
    -
    2017.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A) , Principal investigator

     View Summary

    In this study it was aimed to develop spectroscopic operando observation systems using soft-X-rays and infrared rays and to apply these techniques to detection of catalytically active phases and reactants adsorbing on the active phases under reaction conditions. The development of both operando observation systems has been successfully achieved, which enables us to observe catalytically active surfaces under reaction conditions via X-ray photoelectron spectroscopy, polarized X-ray absorption spectroscopy and polarization-modulation infrared reflection absorption spectroscopy, combined with monitoring of catalytic activity by mass spectrometry. On the basis of this approach we have been able to reveal catalytically active phases and reaction mechanisms, which had been hardly uncovered, and thus we could demonstrate that this approach is useful in catalytic studies.

Awards 【 Display / hide

  • 日本表面真空学会学会賞

    2021.05, 公益社団法人 日本表面真空学会

    Type of Award: Award from Japanese society, conference, symposium, etc.

  • 平成26年度電気化学会論文賞

    2015.03, 電気化学会, Structure and Photo-Induced Charge Transfer of Pyridine Molecules Adsorbed on TiO2(110): A NEXAFS and Core-Hole-Clock Study

  • 日本表面科学会フェロー

    2014.05, 公益社団法人日本表面科学会

    Type of Award: Other

  • 第7回花王研究奨励賞

    KONDOH Hiroshi, 2005.05, 走査型トンネル顕微鏡と放射光X線分光法による自己組織化膜の構造と分子プロセスの解明

    Type of Award: Award from publisher, newspaper, foundation, etc.

 

Courses Taught 【 Display / hide

  • SURFACE AND INTERFACE SCIENCE

    2022

  • SOLID STATE CHEMISTRY (INORGANIC AND ANALYTICAL CHEMISTRY 3)

    2022

  • SEMINAR IN CHEMISTRY

    2022

  • LABORATORIES IN CHEMISTRY 1

    2022

  • INORGANIC CHEMISTRY 1

    2022

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Courses Previously Taught 【 Display / hide

  • 表面界面科学

    keio Univeristy

    2020.10
    -
    Present

    Autumn Semester

  • 化学A

    Keio University

    2009.04
    -
    Present

    Spring Semester, Lecture, Within own faculty, 1h, 200people

    量子化学、構造化学

  • 表面化学特論

    Keio University

    2009.04
    -
    Present

    Autumn Semester, Lecture, Within own faculty, 1h, 40people

  • 現代化学概論

    Keio University

    2009.04
    -
    Present

    Autumn Semester, Lecture, 1h, 200people

  • 化学実験第1

    Keio University

    2008.04
    -
    Present

    Spring Semester, Laboratory work/practical work/exercise, Within own faculty, 6h, 35people

    物理化学実験、無機化学実験

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Social Activities 【 Display / hide

  • VUV・SX高輝度光源利用者懇談会

    2012.04
    -
    Present

Academic Activities 【 Display / hide

  • Associate Editor

    Royal Society of Chemistry, 

    2022.06
    -
    Present

Memberships in Academic Societies 【 Display / hide

  • 触媒学会, 

    2002.04
    -
    Present
  • 日本放射光学会, 

    1999.04
    -
    Present
  • 日本表面科学会, 

    1992.12
    -
    Present
  • The Chemical Society of Japan, 

    1991.03
    -
    Present
  • The Physical Society of Japan, 

    1988.10
    -
    Present

Committee Experiences 【 Display / hide

  • 2018.04
    -
    Present

    領域アドバイザー, JST-CREST

  • 2018.04
    -
    2022.03

    幹事, 日本化学会物理化学ディビジョン

  • 2017.10
    -
    Present

    評議員, 日本放射光学会

  • 2016.11
    -
    Present

    専門委員, 文部科学省科学技術・学術審議会

  • 2016.04
    -
    2017.03

    副委員長, 日本化学会第97春季年会・会場総務委員会

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