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Current Affiliation Organization 【 display / non-display 】

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Acquisition of a qualification 【 display / non-display 】

Acquisition of a qualification 【 display / non-display 】

Research Theme 【 display / non-display 】

Research Theme 【 display / non-display 】

• Recycle chemistry for Islands

Thesis 【 display / non-display 】

Thesis 【 display / non-display 】

• 軽元素を用いた水素貯蔵物質構造変化と反応機構の研究

  2004.03

• Hydrogen storage properties of Metal-Boron-Hydrogen system

  2009.03

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Fundamental Properties of Ammonia Borane Aqueous Solution: Dissolution Enthalpy of Solution, Freezing Points and Solubility Curve, Thermal analysis, Stability and Phase Diagram

  Yoshihiro SHIMIZU, Reiya TAMAKI, Ankit Kumar TRIPATHI, Shuji TAKAMINE, Ye TIAN, Ko KISHIMOTO, Tasuku TERUYA, Yuri UNTEN, Hina SHINJO, Tessui NAKAGAWA

  Journal of the Japan Institute of Energy ( Japan Institute of Energy )  102 ( 7 ) 65 - 76   2023.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Hydrogen carrier by ammonia borane-ammonia system with low-vapor pressure

  Fangqin Guo , Yufeng Wang , Shuji Takamine , Ko Kishimoto , Tomoyuki Ichikawa , Hiroki Miyaoka , Yoshihiro Shimizu , Tessui Nakagawa , Takayuki Ichikawa

  International Journal of Hydrogen Energy ( Elsevier )    2023.04 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Recyclable Dehydrogenation/Regeneration of Ammonia Borane Nanoconfined in Amino-Functionalized ZIF-8 with 3-Amino-1,2,4-triazole

  Guan-Lin Li , Ankit Kumar Tripathi , Hao Chan , Sung-Tzu Chen , Jui-Ting Chang , Tessui Nakagawa , Cheng-Yu Wang

  ACS Sustainable Chem. Eng. ( ACS )  11 ( 16 ) 6143 - 6152   2023.04 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Structural Properties of (Ti, Zr)(Mn, Cr)₂M[0.1] (M = None, Fe, Co, Ni, and Cu) Hydrogen Storage Alloys : Composition Distribution and Occupied Site of Doped Element

  Nakagawa Tessui, Heshiki Daichi, Higa Hiroki, Kawakami Junko, Kobayashi Riki, Hanada Nobuko, Ikeda Kazutaka, Otomo Toshiya, Ofuchi Hironori, Ishida Masayoshi

  MATERIALS TRANSACTIONS ( 公益社団法人 日本金属学会 )  62 ( 6 ) 899 - 904   2021.03 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  <p>CO₂ tolerance of hydrogen storage alloys of AB₂-type (C14 Laves phase) Ti_0.515Zr_0.485Mn_1.2Cr_0.8<i>M</i>_0.1 (AB₂-M, <i>M</i> = none, Fe, Co, Ni, and Cu) depends on dopant <i>M</i>. Since our goal is to clarify this mechanism, we determined the elemental analysis using X-ray absorption spectroscopy (XAS), scanning electron microscope (SEM) coupled with energy dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (XRD), and neutron powder diffraction (NPD) with Rietveld refinement in this study. As a result of XAS analysis, a strong evidence of all doped elements occupying B site in AB₂ was obtained. SEM-EDX showed inhomogeneous composition with vacancy in B site and linear correlation of Ti/Zr and Mn/Cr ratio. The peak width in XRD patterns of AB₂-M depends on the magnitude of homogeneity, therefore the Rietveld analysis using NPD patterns could not be well refined. Thus, homogeneity is not important but element of B site would be important for CO₂ tolerance as well as AB₅ type alloys.</p>

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• Surface-Controlled Conversion of Ammonia Borane from Boron Nitride

  Tessui Nakagawa, Hiroki Uesato, Anthony K. Burrell, Takayuki Ichikawa, Hiroki Miyaoka, Benjamin L. Davis, Yoshitsugu Kojima

  energies ( MDPI )  13 ( 21 ) 5569-1 - 5569-9   2020.10 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  “One-pot regeneration”, which is simple regneneration method of ammonia borane (AB) using hydrazine and liquid ammonia, enables conversion of AB from hexagonal boron nitride (h-BN) after milling hydrogenation. Solution 11B-NMR revealed the presence of AB after NH3/N2H4 treatment of milled h-BN (BNHx) although the yield of AB was less than 5%. The conversion mechanism was clarified as B-H bonds on the h-BN surface created by ball-milling under hydrogen pressure have an ability to form AB, which was confirmed by Thermogravimetry-Residual Gas Analysis (TG-RGA) and Infrared (IR) analysis. The reaction routes are also the same as regeneration route of polyborazylene because intermediates of AB such as (B(NH2)3 and hydrazine borane were found by solution 11B-NMR after soaking BNHx in liquid NH3 and hydrazine, respectively. Because of the fact that all reactions proceed on the h-BN surface and no reaction proceeds when neat h-BN is treated, breaking of B3N3 ring structure and then creation of B-H bond is the key issue to increase conversion yield of AB.

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Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• Ammonia Borane for Hydrogen Sourse as a Mobile Power System

  NAKAGAWA Tessui

  Nihon Enerugii Gakkai Kikanshi Enermix ( The Japan Institute of Energy )  100 ( 6 ) 726 - 733   2021.11

   

  DOI CiNii Research

Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Recent development of ammonia borane as a hydrogen source for fuel cell

  Tessui Nakagawa

  32nd Annual Meeting of MRS-Japan 2022  (Yokohama, Japan)  2022.12  -  2022.12 

• Regeneration of Ammonia Borane nanoconfined in ZIF-8 with 3-amino-1,2,4-triazole exchange from spent fuel

  Ankit Kumar Tripathi, Guan-Lin Li, Hao Chan, Sung-Tzu Chen, Jui-Ting Chang, Tessui Nakagawa, Cheng-Yu Wang

  第8回水素化物に関わる次世代学術・応用展開研究会  (早稲田大学（東京）)  2022.12  -  2022.12 

• In-situ TEM observation of hydrogenation and CO2 conversion reaction of AB2-type hydrogen storage alloy

  Chihiro Ohtsuka, Tessui Nakagwa, Shigeo Arai, Tetsuo Higuchi, Shunsuke Muto

  2022.11  -  2022.11 

• Concentration Dependence on Thermal Decomposition Behavior of Lithium Hydride-Sodium Hydride-Ammonia Borane-Ionic Liquid Mixture

  Yoshihiro Shimizu, Tessui Nakagawa

  2022.11  -  2022.11 

• Challenge for synthesizing single phase of amidoborane-type ionic liquid

  Kazuki Sekiguchi, Tessui Nakagawa

  2022.11  -  2022.11 

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Industrial Property 【 display / non-display 】

Industrial Property 【 display / non-display 】

• Hydrogen production system, fuel cartridge, and ydrogen production system

  Industrial Property No 特願2020-177760  (2020.10.23)

  Patent No 特許6989879  (2021.12.07)

  Tessui Nakagawa, Kazuo Abe, Joji Eguchi, Toru Shirasu

• Synthesis method of ammonia borane

  Industrial Property No 特願2019-039892  (2019.03.05)

  Unexpectedly No 特開2020-147491  (2020.09.17)

  Nakagawa Tessui

Academic Awards 【 display / non-display 】

Academic Awards 【 display / non-display 】

• GSC research award

  2019.11.17   JST   Milling hydrogenation of MgB2

  Winner: Rin Chinen, Tessui Nakagawa

• Poster award

  2015.08.28   10th Hydrogen Meeting for Young Researchers   Ammonia storage properties and high purity ammonia emission method of ammine complex

  Winner: Masa-Aki Shiroma, Tessui Nakagawa

• Professor of th year

  2015.06.25   University of the Ryukyus   Chemistry lab

  Winner: Tessui Nakagawa

• Professor of th year

  2014.11.04   University of the Ryukyus   Chemistry lab

  Winner: Tessui Nakagawa

• Poster award

  2014.08.30   9th Hydrogen Meeting for Young Researchers   New ammonia borane synthesis method from h-BN

  Winner: Tessui Nakagawa, Hiroki Uesato, Anthony K. Burrell, Hiroki Miyaoka, Takayuki Ichikawa, Yoshitsugu Kojima

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Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2021.04  -  2024.03 

  Direct: 3,200,000 (YEN)  Overheads: 4,160,000 (YEN)  Total: 960,000 (YEN)

• Basic research on regeneration method of metal amidoboranes

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2017.04  -  2020.03 

  Direct: 3,700,000 (YEN)  Overheads: 1,110,000 (YEN)  Total: 4,810,000 (YEN)

• Improvement of metal salt for selective ammonia absorption material in the moisture-ammonia mixed gas: determination of crystal structure of ammine complex

  Grant-in-Aid for challenging Exploratory Research

  Project Year: 2016.04  -  2018.03 

  Member: SHIROMA Masaaki, KAWAKAMI Junko, NOZATO Ami

  Direct: 2,900,000 (YEN)  Overheads: 870,000 (YEN)  Total: 3,770,000 (YEN)

  　View Summary

  copper sulfate, as a model compound of NH3 absorbent was investigated in order to (1) synthesize Cu(NH3)n(H2O)5-nSO4 and determine these crystal structure and (2) clarify the relationship between its gas absorption properties (especially absorption pressure) and products. Although single phase of NH3/H2O-mixed complex could not be obtain due to difficulty of synthesis method or degradation, anhydrous ammine complex for n=1, 2, 4, and 5 could be synthesized with almost single phase and space group of n = 4 was determined as P1. Results of NH3-PCT measurement indicate that Cu(NH3)3SO4 does not exist. Enthalpy changes of the anhydrous complex with 2-4 eq. and 4-5 eq. NH3 were determined as -59 and -56.12 kJ/mol NH3.

Joint Research activities 【 display / non-display 】

Joint Research activities 【 display / non-display 】

• In-situ TEM-MS of methanation using hydrogen storage alloys

  Project Year: 2021.04  -  2022.02 

  Member: Nobuko Hanada, Tomohiro Toki, Riki Kobayashi  Offer Organization: Nagoya university

  Direct: 300,000 (YEN)  Overheads: 0 (YEN)  Total: 300,000 (YEN)

• In-situ TEM-MS of methanation using hydrogen storage alloys

  Project Year: 2020.04  -  2021.02 

  Member: Nobuko Hanada, Tomohiro Toki, Riki Kobayashi  Offer Organization: Nagoya university

  Direct: 300,000 (YEN)  Overheads: 0 (YEN)  Total: 300,000 (YEN)

• in-situ TEM-MS observation of methanation using hydrogen storage alloys

  Project Year: 2019.04  -  2020.02 

  Member: Nobuko Hanada, Tomohiro Toki, Riki Kobayashi  Offer Organization: Nagoya university

  Direct: 300,000 (YEN)  Overheads: 0 (YEN)  Total: 300,000 (YEN)

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Social Activity 【 display / non-display 】

• 2022.12

  　

  　

• 2022.10

  　

  　

• 2022.10

  　

  　

• 2022.10

  　

  　

• 2022.05

  　

  　

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