KEIO RESEARCHERS INFORMATION SYSTEM

Career 【 Display / hide 】

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 】

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 】

Academic Degrees 【 Display / hide 】

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

Research Areas 【 Display / hide 】

Research Areas 【 Display / hide 】

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

Research Keywords 【 Display / hide 】

Research Keywords 【 Display / hide 】

• Synchrotron Radiation Science

• Surface Science

• 触媒化学

Research Themes 【 Display / hide 】

Research Themes 【 Display / hide 】

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

  1998

  -

  Present

Books 【 Display / hide 】

Books 【 Display / hide 】

• Compendium of Surface and Interface Analysis

  Springer, Singapore, 2018

  Scope: Chapter “Ambient Pressure X-Ray Photoelectron Spectroscopy”

• X線光電子分光法

  高桑　雄二 他, 講談社, 2018

  Scope: 5.6節、6.1節

• 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

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Papers 【 Display / hide 】

Papers 【 Display / hide 】

• Acid-Base Bifunctional Catalysis of the Lewis Acidic Isolated Co(OH)<inf>2</inf> and Basic N Anion Generated from CeO<inf>2</inf> and 2-Cyanopyridine

  Tamura M., Haga M., Junkaew A., Asada D., Ichikawa R., Toyoshima R., Nakayama A., Kondoh H., Nakagawa Y., Tomishige K.

  ACS Catalysis 14 ( 17 ) 13015 - 13029 2024.09

  　View Summary

  Acid-base bifunctional catalysts, which have both acid and base sites that are arranged at an appropriate distance, are one of the effective catalyst categories and have been extensively studied as a simple and effective method for designing heterogeneous and homogeneous catalysts in both the laboratories and industry. Recently, we found that a heterogeneous-homogeneous hybrid strong base site of N- was constructed only by mixing 2-cyanopyridine and CeO2 in the solution, where the N- site was formed by the covalent bonding between the lattice O atom of CeO2 and the C atom of the CN group in 2-cyanopyridine. Herein, an effective acid-base bifunctional catalyst with proximal sites of the heterogeneous-homogeneous hybrid base site and metal species-derived Lewis acid site is presented. The introduction of Co species into CeO2 forms isolated Co(OH)2 on CeO2, and further introduction of 2-cyanopyridine generates the heterogeneous-homogeneous hybrid base site of N- near the Co(OH)2 without the interference of these sites. The acid-base bifunctional sites work cooperatively to provide about 10-fold higher activity to the hydromethoxylation of acrylonitrile than the heterogeneous-homogeneous hybrid base site alone. Catalyst characterizations such as XRD, TEM, UV-vis, NO adsorption, XPS, Raman, XAS, NH3-TPD and in situ XPS, DFT calculations, and kinetic studies show that acrylonitrile and methanol are activated by the Lewis acidic Co(OH)2 and the hybrid base site, respectively, and the cooperative work results in the large rate enhancement.

  • Access to Document (DOI)

• In Situ Observation of Charge Transfer in the Cocatalyst-Loaded SrTiO<inf>3</inf>:Al Photocatalyst under UV Irradiation by Conversion-Electron-Yield Soft-X-ray Absorption Spectroscopy

  Wang Z., Toyoshima R., Yoshida M., Mase K., Kondoh H.

  Journal of Physical Chemistry C 128 ( 22 ) 9193 - 9201 2024.06

  ISSN  19327447

  　View Summary

  We developed an in situ observation system for photoinduced surface phenomena under ambient-pressure conditions based on conversion-electron-yield soft-X-ray absorption spectroscopy (CEY-SXAS). We applied this technique to in situ observation for photoinduced hole transfer in a highly efficient photocatalyst, Al-doped SrTiO3 (STO:Al), with cocatalysts, Rh/Cr2O3 for the hydrogen evolution reaction (HER) site and the CoOOH oxygen evolution reaction (OER) site. In situ Co L-edge CEY-SXAS measurements under saturated water vapor conditions revealed that UV-vis irradiation readily induces oxidation of Co in the CoOOH OER site, which provides evidence for photoinduced hole transfer from the STO:Al site to the OER site. Interestingly, without loading of the Rh/Cr2O3 HER site or without introducing water vapor, no photoinduced hole transfer to the CoOOH OER site was observed. Coexisting of the Rh/Cr2O3 HER site and water vapor on the STO:Al surface is crucial to the hole transfer to the OER site under photoirradiation.

  • Access to Document (DOI)

• Dehydrogenative oxidation of hydrosilanes using gold nanoparticle deposited on citric acid-modified fibrillated cellulose: unveiling the role of molecular oxygen

  Suwattananuruk B., Uetake Y., Ichikawa R., Toyoshima R., Kondoh H., Sakurai H.

  Nanoscale 16 ( 26 ) 12474 - 12481 2024.05

  ISSN  20403364

  　View Summary

  Efficient and environmentally friendly synthesis of silanols is a crucial issue across the broad fields of academic and industrial chemistry. Herein, we describe the dehydrogenative oxidation of hydrosilane using a gold nanoparticle catalyst supported by fibrillated citric acid-modified cellulose (F-CAC). Au:F-CAC catalysts with various particle sizes (1.7 nm, 4.9 nm, and 7.7 nm) were prepared using the trans-deposition method, a technique previously reported by our group. These catalysts exhibited significant catalytic activity to produce silanols with high turnover frequency (TOF) of up to 7028 h−1. Recycling experiments and transmission electron microscopy (TEM) observation represented the high durability of Au:F-CAC under the reaction conditions, allowing kinetic studies on size dependency. Mechanistic studies were conducted, including isotope labelling experiments, kinetics, and various spectroscopies. Notably, the near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) of the model catalyst (Au:PVP) revealed the formation of catalytically active cationic Au sites on the surface through the adsorption of molecular oxygen, providing a new insight into the reaction mechanism.

  • Access to Document (DOI)

• Understanding of a Pt thin-film H<inf>2</inf> sensor under working conditions using AP-XPS and XAFS

  Toyoshima R., Tanaka T., Kato T., Abe H., Uchida K., Kondoh H.

  Chemistry Letters 53 ( 2 )  2024.02

  ISSN  03667022

  　View Summary

  The operating principle of a Pt thin-film H2 gas sensor was investigated using a combination of surface sensitive ambient-pressure X-ray photoelectron spectroscopy and bulk sensitive X-ray absorption fine structure techniques, which provided chemical and structure information under working conditions, coupled with electric resistivity measurements. It is shown that the sensor response was in a linear relation with both coverages of H and O atoms on the Pt surface. Moreover, the bulk structure of Pt remains unchanged under H2 exposure. These observations support that the resistivity change is associated with electron scattering in the near-surface region.

  • Access to Document (DOI)

• Promotional Effect of Ag on the Catalytic Decomposition of N<inf>2</inf>O in the Presence of O<inf>2</inf> over the Al<inf>2</inf>O<inf>3</inf>-Supported Rh Catalyst

  Jing Y., He C., Zhang N., Murano Y., Toyoshima R., Kondoh H., Kageyama Y., Inomata H., Toyao T., Shimizu K.I.

  ACS Catalysis 13 ( 19 ) 12983 - 12993 2023.10

  　View Summary

  Catalytic decomposition of N2O into N2 and O2 is one of the most important techniques for removing N2O from the atmosphere to curb global warming. Supported RhOx catalysts are known to show high efficiency for N2O decomposition, even in the presence of O2, compared with other materials, such as supported metal oxides and Fe-based zeolite catalysts. In this study, the addition of Ag was found to enhance the efficiency of an Al2O3-supported RhOx catalyst (RhOx/Al2O3) for N2O decomposition. The promotional effect of Ag was investigated using various operando spectroscopic methods, including X-ray absorption spectroscopy, diffuse reflectance UV-vis spectroscopy (DR UV-vis), ambient-pressure X-ray photoelectron spectroscopy, and kinetic studies. The results demonstrated that the addition of Ag enhanced the catalytic efficiency of the supported RhOx catalysts by enhancing the thermal reduction of Rh oxide, which was identified as the rate-determining step, especially at low temperatures.

  • Access to Document (DOI)

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

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

• Development of ambient pressure ultrasoft-X-ray fluorescence yield XAFS and its application to operando observations for a new type of fuel cell

  Kondoh, Hiroshi

  学事振興資金研究成果実績報告書 (慶應義塾大学)  2021

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

  Kondō, Hiroshi

  科学研究費補助金研究成果報告書 2020

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

  Kondo, Hiroshi

  科学研究費補助金研究成果報告書 2016

• Development of time-resolved ambient-pressure surface core-level spectroscopy and its application to surface dynamic processes

  Kondo, Hiroshi

  科学研究費補助金研究成果報告書 2010

Reviews, Commentaries, etc. 【 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 】

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 】

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

• Development of operando measurement system based on ultrasoft-x-ray charged-particle-yield surface XAFS and its application to studies on catalysis

  2022.04

  -

  2025.03

  MEXT,JSPS, Grant-in-Aid for Scientific Research, 基盤研究(B), Principal investigator

• 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 】

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 】

Courses Taught 【 Display / hide 】

• SURFACE AND INTERFACE SCIENCE

  2024

• SOLID STATE CHEMISTRY (INORGANIC AND ANALYTICAL CHEMISTRY 3)

  2024

• SEMINAR IN CHEMISTRY

  2024

• LABORATORIES IN CHEMISTRY 1

  2024

• INORGANIC CHEMISTRY 1

  2024

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Courses Previously Taught 【 Display / hide 】

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 】

Social Activities 【 Display / hide 】

• VUV・SX高輝度光源利用者懇談会

  2012.04

  -

  Present

Academic Activities 【 Display / hide 】

Academic Activities 【 Display / hide 】

• Associate Editor

  Royal Society of Chemistry, 

  2022.06

  -

  Present

Memberships in Academic Societies 【 Display / hide 】

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 】

Committee Experiences 【 Display / hide 】

• 2023.05

  -

  Present

  理事, 日本表面真空学会

• 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

  -

  2022.09

  評議員, 日本放射光学会

• 2016.11

  -

  2023.03

  専門委員, 文部科学省科学技術・学術審議会

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