Updated on 2022/04/04

写真a

 
OGAWA Satoshi
 
Organization
Graduate School of Engineering Energy Engineering 1 Assistant Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Energy Science and Engineering
Title
Assistant Professor
Contact information
メールアドレス

Degree 1

  1. Doctor (Engineering) ( 2014.4   Nagoya University ) 

Research Interests 8

  1. Nanoparticle

  2. Hydrogen storage material

  3. Hydrogen storage material

  4. X-ray Photoelectron Spectroscopy (XPS)

  5. X-ray Absorption Fine Structure (XAFS)

  6. XPS

  7. Nanoparticle

  8. XAFS

Research Areas 2

  1. Nanotechnology/Materials / Applied condensed matter physics  / X-ray spectroscopy analysis

  2. Nanotechnology/Materials / Nanostructural physics  / Nanoparticle

Current Research Project and SDGs 1

  1. 水素吸蔵ナノ材料の創製とその評価

Research History 4

  1. Nagoya University   Graduate School of Engineering Energy Engineering 1   Assistant Professor

    2017.4

  2. Nagoya University   Graduate School of Engineering Department of Materials,Physics and Energy Engineering Quantum Energy System Engineering   Assistant Professor

    2014.4 - 2017.3

  3. Research Fellow of the Japan Socie ty for the Promotion of Science

    2011.4 - 2014.3

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    Country:Japan

  4. Research Fellow of the Japan Socie ty for the Promotion of Science

    2011.4 - 2014.3

Education 5

  1. Nagoya University   Graduate School, Division of Engineering   Department of Quantum Engineering

    2009.4 - 2014.3

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    Country: Japan

  2. Nagoya University   Graduate School, Division of Engineering   Department of Quantum Engineering

    2011.4 - 2014.3

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    Country: Japan

  3. Nagoya University   Graduate School, Division of Engineering   Department of Quantum Engineering

    2011.4 - 2014.3

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    Country: Japan

  4. Nagoya University   Faculty of Engineering

    2005.4 - 2009.3

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    Country: Japan

  5. Nagoya University   Faculty of Engineering

    2005.4 - 2009.3

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    Country: Japan

Professional Memberships 3

  1. The Japan Institute of Metals and Materials

    2016.9

  2. The Japanese Society for Synchrotron Radiation Research

    2014.10

  3. The Japanese XAFS Society

    2009.9

Committee Memberships 1

  1. 日本XAFS研究会   企画幹事  

    2020.1 - 2021.12   

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    Committee type:Academic society

Awards 1

  1. Student Award

    2013.12   9th International Symposium on Atomic Level Characterization for New Materials and Devices '13   XAFS and XPS study of hydro-/dehydrogenation reaction of Mg-Pd nanoparticles

    Satoshi Ogawa

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    Award type:Award from international society, conference, symposium, etc. 

 

Papers 32

  1. Sulfur in humin as a redox-active element for extracellular electron transfer

    Pham Duyen Minh, Oji Hiroshi, Yagi Shinya, Ogawa Satoshi, Katayama Arata

    GEODERMA   Vol. 408   2022.2

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    Language:Japanese   Publisher:Geoderma  

    Humin (HM), an insoluble humic substance that occurs as an organo-mineral complex, mediates extracellular electron transfer (EET) among microorganisms in the geosphere. Although sulfur (S)-containing functional groups have been posited as possible redox-active groups in HM, there has been no direct evidence in this regard. Here, we characterized the redox-active S in HM from different natural sources using synchrotron radiation-based X-ray absorption spectroscopy in partial fluorescence yield mode. The S content in HM is less than 0.9%, with the oxidation states ranged widely from −2 to +6. About 9% to 19% of total S in HM was redox variable, corresponding to 1.2 × 10−5 to 17.1 × 10−5 Eq/g-HM redox capacity. The redox capacity of HM driven by S is comparable to or larger than the electron donating capacity of HM observed in anaerobic microbial dechlorination of pentachlorophenol, suggesting that S is one of the significant redox-active elements in HM. These findings provide new insights into the role of S cycling in biogeochemical processes and microbial energy networks.

    DOI: 10.1016/j.geoderma.2021.115580

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    Scopus

  2. Effects of the amount of Au nanoparticles on the visible light response of TiO2 photocatalysts

    Yoshida Tomoko, Misu Yuhei, Yamamoto Muneaki, Tanabe Tetsuo, Kumagai Jun, Ogawa Satoshi, Yagi Shinya

    CATALYSIS TODAY   Vol. 352   page: 34 - 38   2020.8

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    Language:Japanese   Publisher:Catalysis Today  

    We have succeeded to prepare Au nanopareticle deposited TiO2 photocatalysts (Au/TiO2) with control of Au nanoparticle size to be around 8 nm and variation of number density using a colloid photodepostion method. The prepared Au/TiO2 exhibits activity on decomposition (oxidation) of formic acid by thermally activated and photo-activated catalytic reactions. The thermally activated catalytic decomposition gradually increases with increasing the number density of deposited Au NPs and saturated, suggesting that the decomposition occurs on Au NPs surface and/or near the interface of TiO2 and Au NPs. On the other hand, the photocatalytic decomposition is significantly improved with rather small number density deposition of Au NPs and disappeared with high number density deposition. ESR measurements of Au/TiO2 in the surrounding similar to the photocatalytic decomposition suggests that electrons excited by plasmon resonance absorption in the Au NPs transfer to TiO2 to promote the decomposition. However, high number density deposition enhances electron capture by neighboring Au NPs and reduces the photocatalytic activity. Thus there should be the optimum number density of Au NPs on TiO2 for photocatalytic decomposition of formic acid.

    DOI: 10.1016/j.cattod.2019.12.035

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  3. Characterization by Synchrotron-Radiation X-Ray Photoelectron Spectroscopy of NO Adsorption on Rh (vol 16, pg 36, 2018)

    Koda Yuki, Sumida Hirosuke, Ogawa Satoshi, Tsukada Chie, Namatame Hirofumi

    E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY   Vol. 17   page: 69 - 70   2019.7

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    Language:Japanese   Publisher:e-Journal of Surface Science and Nanotechnology  

    Figures 3 and 4 in the original article [1] were inappropriately displayed. Correct figures are shown below. “Table 1” and “Table 3” that appear in the text on p. 39 in Ref. 1 should be replaced by “Table I” and “Table III”, respectively. The publisher found that they occurred during the production process. None of the corrections change any discussion and conclusions of the article. (Figure Presented).

    DOI: 10.1380/ejssnt.2019.69

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  4. Development of sample preparation technique to characterize chemical structure of humin by synchrotron-radiation-based X-ray photoelectron spectroscopy

    Duyen Minh Pham, Miyata Yasushi, Awata Takanori, Nakatake Masashi, Zhang Chung Fang, Kanda Keiji, Ogawa Satoshi, Ohta Shozo, Yagi Shinya, Katayama Arata

    SURFACE AND INTERFACE ANALYSIS   Vol. 51 ( 2 ) page: 226 - 233   2019.2

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    Language:Japanese   Publisher:Surface and Interface Analysis  

    Carbon-binding state of humin (HM, a non-conductive insoluble organo-mineral humic substance) was successfully characterized for the first time by synchrotron-radiation–based X-ray photoelectron spectroscopy (XPS). Four sample preparation techniques—HM on double-sided carbon tape, indium sheet, copper mesh, and in pellet formed from the mixture of HM and copper powder (Cu) at different mixing ratios (1:1, 1:2, and 1:6 v/v)—were compared. The results show that HM samples prepared using the first three methods had significant charge buildup, which made the interpretation of the XPS spectra impossible because of the shifts in the binding energy of C 1s XPS spectra. Pellets of HM:Cu mixture enhanced the electrical conductivity and reduced charge buildup on the sample surface. Pellets prepared with HM:Cu ratio of 1:1 (v/v) provided the minimum charge buildup and high sensitivity with difference in C 1s spectra regardless of the observing position. The C 1s spectra, estimated by the subtraction of the carbon contamination in Cu, showed the resolution of CC (284.0 eV), CC/CH (285.1 eV), CO (286.3 eV), CO (287.3 eV), and OCO (288.3 eV) and three additional peaks of CF (289.3 eV), CF2 (290.2 eV), and CF3 (291.4 eV). Soft X-ray absorption spectroscopic (XAS) analysis further proved the existence of fluoride (F 1s) in HM structure. The detection of fluorinated carbon in HM showed a great advancement of XPS compared with other conventional analyses. X-ray with the incident angle of 0° provided the smallest (nearly negligible) energy shift in the C 1s spectra of HM and did not damage the surface of the sample.

    DOI: 10.1002/sia.6574

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  5. Surface chemical states of gold nanoparticles prepared using the solution-plasma method in a CsCl aqueous solution

    Tsukada Chie, Yoshida Hikaru, Ogawa Satoshi, Yoshigoe Akitaka, Yagi Shinya, Yaita Tsuyoshi

    SURFACE AND INTERFACE ANALYSIS   Vol. 51 ( 1 ) page: 85 - 88   2019.1

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    Language:Japanese   Publisher:Surface and Interface Analysis  

    In this study, gold nanoparticles (AuNPs) prepared in a 5 mM CsCl aqueous solution using the solution-plasma method are characterized via transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy with synchrotron radiation (SR-XPS). The particle diameter is measured over the process time via TEM. During the solution-plasma process, small particles of 2.1 to 2.2-nm diameter are generated in the CsCl aqueous solution; these particles then enlarge via Ostwald ripening over time until they reach an equilibrium size of ~13 nm after 36 days. In addition, the surface chemical states of the AuNPs are characterized at different depths via SR-XPS. The SR-XPS measurements obtained using incident X-ray energy (hν) of 945.0 eV revealed that Cs─Au, Cl─Au, and Cs─Cl─Au bonds are present 1.2 nm below the surface. The measurements obtained at an incident X-ray energy of 2515.0 eV showed that Cs─Cl─Au bonding is also present 2.5 nm below the surface, indicating that Cs and Cl strongly interact with Au. The TEM and SR-XPS measurements revealed that 2 processes occur cyclically during the growth process via Ostwald ripening: (i) the Cs and Cl in the aqueous solution adsorb on the AuNP surface and (ii) Au atoms subsequently bond to the AuNPs surface.

    DOI: 10.1002/sia.6555

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  6. Au nanorods fabricated by means of solution plasma method

    Tsukada Chie, Mizutani Tsuyoshi, Ogawa Satoshi, Nameki Hirofumi, Yagi Shinya

    SURFACE AND INTERFACE ANALYSIS   Vol. 48 ( 11 ) page: 1248 - 1251   2016.11

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    Language:Japanese  

    DOI: 10.1002/sia.6096

    Web of Science

  7. XAFS analysis for quantification of the gallium coordinations in Al2O3-supported Ga2O3 photocatalysts

    Akatsuka M., Yoshida T., Yamamoto N., Yamamoto M., Ogawa S., Yagi S.

    16TH INTERNATIONAL CONFERENCE ON X-RAY ABSORPTION FINE STRUCTURE (XAFS16)   Vol. 712   2016

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  8. Characterization of nitrogen ion implanted TiO2 photocatalysts by XAFS and XPS

    Yoshida Tomoko, Niimi Satoshi, Yamamoto Muneaki, Ogawa Satoshi, Nomoto Toyokazu, Yagi Shinya

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS   Vol. 365   page: 79 - 81   2015.12

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  9. In situ UV-vis investigation of growth of gold nanoparticles prepared by solution plasma sputtering in NaCl solution

    Mizutani Tsuyoshi, Ogawa Satoshi, Murai Takaaki, Nameki Hirofumi, Yoshida Tomoko, Yagi Shinya

    APPLIED SURFACE SCIENCE   Vol. 354   page: 397 - 400   2015.11

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  10. Hydrogen storage property of materials composed of Mg nanoparticles and Ni nanoparticles fabricated by gas evaporation method

    Fujimoto Taishi, Ogawa Satoshi, Kanai Tomomi, Uchiyama Naoki, Yoshida Tomoko, Yagi Shinya

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   Vol. 40 ( 35 ) page: 11890 - 11894   2015.9

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  11. Vulcanization reaction of squalene and S-8 powder studied by Sulfur K-edge NEXAFS under liquid phase

    Yagi S., Menjo Y., Tsukada C., Ogawa S., Kutluk G., Namatame H., Taniguchi M.

    INTERNATIONAL CONFERENCE ON SOLID FILMS AND SURFACES (ICSFS 2014)   Vol. 76   2015

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  12. Spectroscopic and morphological studies on interaction between gold nanoparticle and liposome constructed with phosphatidylcholine

    Tsukada C., Tsuji T., Matsuo K., Nomoto T., Kutluk G., Sawada M., Ogawa S., Yoshida T., Yagi S.

    INTERNATIONAL CONFERENCE ON SOLID FILMS AND SURFACES (ICSFS 2014)   Vol. 76   2015

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  13. Hydrogen storage property of Ni nanoparticles fabricated by the gas evaporation method

    Fujimoto Taishi, Ogawa Satoshi, Yoshida Tomoko, Uchiyama Naoki, Yagi Shinya

    SURFACE AND INTERFACE ANALYSIS   Vol. 46 ( 12-13 ) page: 1121 - 1124   2014.12

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    Language:Japanese  

    DOI: 10.1002/sia.5566

    Web of Science

  14. Spectral studies on sulfur poisoning of Pd/Mg6Ni by NEXAFS and XPS

    Yagi S., Nambu M., Tsukada C., Ogawa S., Kutluk G., Namatame H., Taniguchi M.

    APPLIED SURFACE SCIENCE   Vol. 267   page: 45 - 47   2013.2

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  15. Morphological and spectroscopic studies on enlargement of Pd nanoparticle in L-cysteine aqueous solution by AFM and XPS

    Tsukada C., Ogawa S., Niwa H., Nomoto T., Kutluk G., Namatame H., Taniguchi M., Yagi S.

    APPLIED SURFACE SCIENCE   Vol. 267   page: 48 - 52   2013.2

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  16. NEXAFS Study of Air Oxidation for Mg Nanoparticle Thin Film

    Ogawa S., Murakami S., Shirai K., Akanishi K., Ohta T., Yagi S.

    15TH INTERNATIONAL CONFERENCE ON THIN FILMS (ICTF-15)   Vol. 417   2013

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  17. Aggregation mechanism of Pd nanoparticles in L-cysteine aqueous solution studied by NEXAFS and AFM

    Tsukada C., Ogawa S., Mizutani T., Kutluk G., Namatame H., Taniguchi M., Yagi S.

    APPLIED SURFACE SCIENCE   Vol. 262   page: 184 - 187   2012.12

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  18. Adsorption behavior of L-cysteine on Ag nanoparticles under water environment studied by S K-edge NEXAFS

    Tsukada C., Yagi S., Nomoto T., Mizutani T., Ogawa S., Nameki H., Nakanishi Y., Kutluk G., Namatame H., Taniguchi M.

    APPLIED SURFACE SCIENCE   Vol. 262   page: 231 - 233   2012.12

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  19. STUDY ON RADIATION DAMAGE FOR L-CYSTEINE ON AU NANOPARTICLE BY SOFT X-RAY

    Tsukada Chie, Mizutani Tsuyoshi, Ogawa Satoshi, Nomoto Toyokazu, Nameki Hironori, Ueno Tetsuro, Sawada Masahiro, Kutluk Galif, Namatame Hirofumi, Taniguchi Masaki, Yoshida Tomoko, Yagi Shinya

    NANOCON 2012, 4TH INTERNATIONAL CONFERENCE     page: 648 - 653   2012

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    Language:Japanese  

    Web of Science

  20. IN-SITU MG K- AND PD L-3-EDGES NEXAFS INVESTIGATION OF MG-PD NANOPARTICLES

    Ogawa Satoshi, Mizutani Tsuyoshi, Ogawa Masahiro, Yogi Chihiro, Ohta Toshiaki, Yoshida Tomoko, Yagi Shinya

    NANOCON 2012, 4TH INTERNATIONAL CONFERENCE     page: 274 - 279   2012

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    Language:Japanese  

    Web of Science

  21. Comparison of platinum photodeposition processes on two types of titanium dioxide photocatalysts

    Yamamoto Muneaki, Minoura Yasuhiro, Akatsuka Masato, Ogawa Satoshi, Yagi Shinya, Yamamoto Akira, Yoshida Hisao, Yoshida Tomoko

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 22 ( 16 ) page: 8730 - 8738   2020.4

  22. Synthesis of Ag nanoparticles prepared by a solution plasma method and application as a cocatalyst for photocatalytic reduction of carbon dioxide with water

    Tomoko Yoshida, Naoto Yamamoto, Tsuyoshi Mizutani, Muneaki Yamamoto, Satoshi Ogawa, Shinya Yagi, Hirofumi Nameki, Hisao Yoshida

    Catalysis Today   Vol. 303   page: 320 - 326   2018.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    Silver nanoparticles (Ag NPs) were synthesized by a solution plasma method (SPM) in an aqueous solution of ammonia. Optical emission spectra of the plasma revealed that Ag NPs are fabricated with the sputtering of Ag rods as electrode by the produced energetic plasma particles such as H, OH and O radicals. In-situ optical absorption measurements of the solution during the discharge directly presented the concerted formation and aggregation processes of the Ag NPs, which controlled the size of Ag NPs. The synthesized Ag NPs were loaded on gallium oxide (Ga2O3) photocatalyst, and the photocatalytic activities of the obtained Ag loaded Ga2O3 (Ag/Ga2O3) samples were evaluated. Although the photocatalytic reaction proceeded over all the samples to produce CO, the CO production rates decreased with the reaction time. Measurements of DR UV–vis spectra and TEM images revealed that a part of the Ag NPs migrated and aggregated on the photocatalyst surface to become larger particles during the photocatalytic reaction, which would be related to the decrease of the photocatalytic activity. It was also found that the photoirradiation treatment on the prepared Ag/Ga2O3 sample before the use for the photocatalytic reaction improves the photocatalytic performance.

    DOI: 10.1016/j.cattod.2017.08.047

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  23. Characterization by synchrotron-radiation X-ray photoelectron spectroscopy of NO adsorption on Rh

    Yuki Koda, Hirosuke Sumida, Satoshi Ogawa, Chie Tsukada, Hirofumi Namatame

    e-Journal of Surface Science and Nanotechnology   Vol. 16   page: 36 - 40   2018.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Surface Science Society of Japan  

    Rhodium nanoparticles were deposited by the evaporation method on a silicon wafer. The process used He gas in a Rh evaporation chamber that was connected to the load-lock chamber of BL6N1 at Aichi Synchrotron Radiation Center (Aichi SR). NO gas was introduced into the evaporation chamber, and the deposited Rh nanoparticles were exposed to NO with and without an ambient atmosphere to study the effect of O2 on the electronic properties of the Rh nanoparticles and the behavior of NO molecules using synchrotron-radiation X-ray photoelectron spectroscopy (SR-XPS). The diameter of the Rh nanoparticles was estimated by transmission electron microscopy to be 2.7±0.6 nm. The XPS analysis indicates that the deposited Rh nanoparticles before NO exposure were in the metallic state. After exposure to NO, a part of the outermost surface of the Rh nanoparticles changed into Rh oxide, and NO molecules, atomic N and O species, and NO2 were detected. On the other hand, after exposure to NO in ambient air, the surface of the Rh nanoparticles was preferentially oxidized. In addition, a few NO molecules were adsorbed on the surface of Rh, and a small amount of the adsorbed NO that reacted with the surface oxygen turned into NO2.

    DOI: 10.1380/ejssnt.2018.36

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  24. Fabrication and in/ex situ XPS characterization of Rh nanoparticles

    Yuki Koda, Hirosuke Sumida, Satoshi Ogawa, Chie Tsukada, Hirofumi Namatame

    e-Journal of Surface Science and Nanotechnology   Vol. 15   page: 50 - 54   2017.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Surface Science Society of Japan  

    Rh nanoparticles have been fabricated by the evaporation method using the He gas in the Rh evaporation chamber, connected with the pre-evacuation chamber of BL6N1 at Aichi Synchrotron Radiation Center (Aichi SR). The electronic and geometric properties of the Rh nanoparticles have been verified without atmosphere exposure (in situ XPS) and after atmosphere exposure (ex situ XPS) using SR-XPS and TEM. The size of Rh nanoparticles is estimated 1.8±0.5 nm in diameter and deposited on a substrate. Judging from the result of the in situ XPS analysis with photon energy of 2.0 keV and 3.5 keV, the surface of the deposited Rh nanoparticles without atmosphere exposure is the metallic state. On the other side, the outermost surface changes into Rh oxide after atmosphere exposure even in a short time. For a long time atmosphere exposure moreover, the Rh oxide increases in the depth direction, and the deep area is in the higher oxidation state.

    DOI: 10.1380/ejssnt.2017.50

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  25. Hydrogen storage of binary nanoparticles composed of Mg and Pd Reviewed

    Satoshi Ogawa, Taishi Fujimoto, Tsuyoshi Mizutani, Masahiro Ogawa, Naoki Uchiyama, Kazuo Kato, Toshiaki Ohta, Tomoko Yoshida, Shinya Yagi

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   Vol. 40 ( 35 ) page: 11895 - 11901   2015.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    The hydrogen storage property of the binary nanoparticles composed of Mg and Pd has been investigated by the QCM technique without the exposure to the air. The two types of nanopardcles have been fabricated by the gas evaporation method with the He gas. The one is the nanoparticles composed of the both Mg and Pd atoms (Mg-Pd NPs) and the other one is the composite of the Mg and Pd nanoparticles (Mg NPs-Pd NPs). Both the Mg-Pd NPs and the Mg NPs-Pd NPs can absorb the hydrogen under the room temperature and 1 atm of H-2 gas. However, the desorptions of the hydrogen have not been observed about the both samples. We have also studied the chemical state of the NPs by XPS and XAFS. The XAFS analyses have revealed that the MgH2 in the NPs can not be dehydrogenated at the room temperature even if the catalytic effect of the Pd. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.ijhydene.2015.04.087

    Web of Science

  26. 金属ナノ粒子を用いた水素吸蔵材料の分光学的手法による化学状態分析 Reviewed

    小川智史, 内山直樹, 藤本大志, 金井友美, 八木伸也

    日本金属学会誌   Vol. 79 ( 3 ) page: 118-123 - 123   2015

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/jinstmet.JC201409

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  27. XAFS and XPS study of hydro-/dehydrogenation reaction of Mg-Pd nanoparticles Reviewed

    Satoshi Ogawa, Taishi Fujimoto, Tsuyoshi Mizutani, Masahiro Ogawa, Chihiro Yogi, Kazuo Kato, Toshiaki Ohta, Tomoko Yoshida, Shinya Yagi

    SURFACE AND INTERFACE ANALYSIS   Vol. 46 ( 12-13 ) page: 1143 - 1146   2014.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-BLACKWELL  

    The nanoparticles composed of Mg and Pd atoms (Mg-Pd NPs) have been fabricated by the gas evaporation method, and the variation of the chemical state during hydro-/dehydrogenations has been investigated by X-ray photoelectron spectroscopy (XPS) and in-situ X-ray absorption fine structure (XAFS) analyses. Both XPS and XAFS spectra have indicated that the Mg-Pd NPs contain the chemical state of the metallic Pd and Mg-Pd alloy phases. The Mg-Pd alloy phase has been identified as MgPd and Mg6Pd by the Pd K-edge EXAFS analysis. The hydrogen release of the Mg-Pd NPs has not been observed after first hydrogenation due to the migration of Mg toward the surface of the Mg-Pd NPs during the hydrogen storage. This irreversible migration has led the inhibition of the hydrogen diffusion into the surface from the inside of the Mg-Pd NPs. Copyright (c) 2014 John Wiley & Sons, Ltd.

    DOI: 10.1002/sia.5647

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  28. The Spectroscopic Study on the Chemical State at Pd/Mg Interface Reviewed

    Shunsuke Murakami, Satoshi Ogawa, Ken Shirai, Chie Tsukada, Shinya Yagi, Koji Nakanishi, Toshiaki Ohta

    e-Journal of Surface Science and Nanotechnology   Vol. 9   page: 438 - 441   2011.12

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1380/ejssnt.2011.438

  29. Size Dependence of Air Oxidation for Mg Nanoparticle Reviewed

    Satoshi Ogawa, Shunsuke Murakami, Ken Shirai, , Koji Nakanishi, Chie Tsukada, Toshiaki Ohta, Shinya Yagi

    e-Journal of Surface Science and Nanotechnology   Vol. 9   page: 315 - 321   2011.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1380/ejssnt.2011.315

  30. Influence of CO 2 and H 2 O on Air Oxidation of Mg Nanoparticles Studied by NEXAFS Reviewed

    Journal of Surface Analysis   Vol. 17 ( 3 ) page: 319 - 323   2011.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1384/jsa.17.319

  31. 大気酸化したMgナノ粒子のNEXAFS分析 Reviewed

    小川智史,丹羽悠登,中西康次,太田俊明,八木伸也

    電気学会論文誌C   Vol. 130 ( 10 ) page: 1746 - 1750   2010.10

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1541/ieejeiss.130.1746

  32. Fabrication and Characterization of Magnesium Nanoparticle by Gas Evaporation Method Reviewed

    Satoshi Ogawa, Hironori Niwa, Toyokazu Nomoto, Shinya Yagi

    e-Journal of Surface Science and Nanotechnology   Vol. 8   page: 246 - 249   2010.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1380/ejssnt.2010.246

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MISC 3

  1. Hydrogen storage of binary nanoparticles composed of Mg and Pd Reviewed

    Satoshi Ogawa, Taishi Fujimoto, Tsuyoshi Mizutani, Masahiro Ogawa, Naoki Uchiyama, Kazuo Kato, Toshiaki Ohta, Tomoko Yoshida, Shinya Yagi

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   Vol. 40 ( 35 ) page: 11895 - 11901   2015.9

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    The hydrogen storage property of the binary nanoparticles composed of Mg and Pd has been investigated by the QCM technique without the exposure to the air. The two types of nanopardcles have been fabricated by the gas evaporation method with the He gas. The one is the nanoparticles composed of the both Mg and Pd atoms (Mg-Pd NPs) and the other one is the composite of the Mg and Pd nanoparticles (Mg NPs-Pd NPs). Both the Mg-Pd NPs and the Mg NPs-Pd NPs can absorb the hydrogen under the room temperature and 1 atm of H-2 gas. However, the desorptions of the hydrogen have not been observed about the both samples. We have also studied the chemical state of the NPs by XPS and XAFS. The XAFS analyses have revealed that the MgH2 in the NPs can not be dehydrogenated at the room temperature even if the catalytic effect of the Pd. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.ijhydene.2015.04.087

    Web of Science

  2. 金属ナノ粒子を用いた水素吸蔵材料の分光学的手法による化学状態分析 Reviewed

    小川智史, 内山直樹, 藤本大志, 金井友美, 八木伸也

    日本金属学会誌   Vol. 79 ( 3 ) page: 118-123   2015

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    Language:Japanese   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)  

    DOI: 10.2320/jinstmet.JC201409

  3. XAFS and XPS study of hydro-/dehydrogenation reaction of Mg-Pd nanoparticles Reviewed

    Satoshi Ogawa, Taishi Fujimoto, Tsuyoshi Mizutani, Masahiro Ogawa, Chihiro Yogi, Kazuo Kato, Toshiaki Ohta, Tomoko Yoshida, Shinya Yagi

    SURFACE AND INTERFACE ANALYSIS   Vol. 46 ( 12-13 ) page: 1143 - 1146   2014.12

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:WILEY-BLACKWELL  

    The nanoparticles composed of Mg and Pd atoms (Mg-Pd NPs) have been fabricated by the gas evaporation method, and the variation of the chemical state during hydro-/dehydrogenations has been investigated by X-ray photoelectron spectroscopy (XPS) and in-situ X-ray absorption fine structure (XAFS) analyses. Both XPS and XAFS spectra have indicated that the Mg-Pd NPs contain the chemical state of the metallic Pd and Mg-Pd alloy phases. The Mg-Pd alloy phase has been identified as MgPd and Mg6Pd by the Pd K-edge EXAFS analysis. The hydrogen release of the Mg-Pd NPs has not been observed after first hydrogenation due to the migration of Mg toward the surface of the Mg-Pd NPs during the hydrogen storage. This irreversible migration has led the inhibition of the hydrogen diffusion into the surface from the inside of the Mg-Pd NPs. Copyright (c) 2014 John Wiley & Sons, Ltd.

    DOI: 10.1002/sia.5647

    Web of Science

Presentations 2

  1. 液中プラズマ法で作製したナノ粒子 Invited

    小川智史

    2021年度第3回人工光合成研究拠点 講演会   2021.6.17  大阪市立大学人工光合成研究センター

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    Event date: 2021.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:オンライン開催  

  2. Mg-Mnナノ粒子の軟X線XAFS分析

    小川智史

    日本金属学会 2022年春期(第170回)  2021.3.16  公益社団法人 日本金属学会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催  

Research Project for Joint Research, Competitive Funding, etc. 1

  1. ソリューションプラズマ法を応用した新奇Mg-Ni系水素吸蔵合金ナノ粒子の創製とその評価

    2015.4 - 2016.12

    日東学術振興財団助成金 

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    Grant type:Competitive

KAKENHI (Grants-in-Aid for Scientific Research) 7

  1. コアシェル構造を有する新奇Mg-Pdナノ粒子の開発と水素吸放出特性評価

    2014.10 - 2016.3

    科学研究費補助金 

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    Authorship:Principal investigator 

  2. 金属ナノ粒子を用いた高い水素吸放出特性を有する新奇材料の開発

    2011.4 - 2014.3

    科学研究費補助金  特別研究員奨励費(DC1)

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    Authorship:Principal investigator 

  3. Mechanism and control of hydrogen storage and supply reactions under inner stress field induced by nano-interface with immiscible metals

    Grant number:21H01744  2021.4 - 2024.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s) 

  4. Hydrogen storage of Mg composite nanoparticles by controlling of the nano-interface

    Grant number:18K14089  2018.4 - 2022.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

  5. Fabrication and characterization of the core-shell type Pd/Mg nanoparticles for the hydrogen storage application

    Grant number:26889034  2014.8 - 2016.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Research Activity Start-up

    Ogawa Satoshi

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    Authorship:Principal investigator 

    Grant amount:\2730000 ( Direct Cost: \2100000 、 Indirect Cost:\630000 )

    We have attempted the fabrication of the core-shell type nanoparticle composed of Mg core and Pd shell (Pd/Mg NPs) for the hydrogen storage application. The gas evaporation method using He gas was adopted to fabricate the Pd/Mg NPs. The evaporated Mg atoms were condensed into the Mg NPs in the He gas atmosphere. After that, the surface of the Mg NPs was decorated with Pd. As a result, unfortunately, we have not been able to establish the covering the Mg NPs with Pd shell. The Pd atoms have formed the Pd NPs on the surface of the Mg NPs.
    We have investigated the hydrogen storage property of this composite material of the Mg and Pd NPs. The almost 90% of the Mg atoms in this material have been hydrogenated at the room temperature. The analyses of the chemical state using X-ray have revealed that the interfacial Mg-Pd alloy is formed between Mg and Pd nanoparticles.

  6. コアシェル構造を有する新奇Mg-Pdナノ粒子の開発と水素吸放出特性評価

    2014.10 - 2016.3

    日本学術振興会  科学研究費助成事業  若手研究(スタートアップ)

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    Grant type:Competitive

  7. 金属ナノ粒子を用いた高い水素吸放出特性を有する新奇材料の開発

    2011.4 - 2014.3

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

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    Grant type:Competitive

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Teaching Experience (On-campus) 9

  1. エネルギー理工学実験第1

    2021

  2. エネルギー理工学実験第2A・B

    2021

  3. エネルギー理工学実験第2A・B

    2020

  4. エネルギー理工学実験第1

    2020

  5. エネルギー理工学実験第1

    2019

  6. エネルギー理工学実験第2A・B

    2019

  7. 量子エネルギー工学学生実験第2A・B

    2018

  8. 量子エネルギー工学実験第2A・B

    2017

  9. 量子エネルギー工学学生実験第1

    2017

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