Takimoto Daisuke

写真a

Researcher Number(JSPS Kakenhi)

60806529

Homepage URL

https://takimotodai.wixsite.com/daitaki

University 【 display / non-display

  •  
    -
    2017

    Shinshu University     Graduated

Graduate School 【 display / non-display

  •  
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    2017.03

    Shinshu University    Doctor's Course  Completed

External Career 【 display / non-display

  • 2016.04
    -
    2017.03

    Research Fellow of the Japan Society for the Promotion of Science (DC2)@Shinshu Univ.  

  • 2016.04
    -
    2017.03

     

  • 2017.04
    -
    2017.09

    Research Fellow of the Japan Society for the Promotion of Science (PD)@Tsukuba Univ.  

  • 2017.04
    -
    2017.09

     

  • 2017.10
    -
    2019.03

    Shinshu University, Interdisciplinary Cluster for Cutting Edge Research, Center for Energy and Environmental Science, Assistant professor  

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Research Interests 【 display / non-display

  • Materials and Chemical Engineering

  • Electrochemical Engineering

Research Areas 【 display / non-display

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Catalyst and resource chemical process

  • Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry

Published Papers 【 display / non-display

  • Zero-Overpotential Redox Reactions of Quinone-Based Molecules Confined in Carbon Micropores.

    Takimoto D, Suzuki K, Futamura R, Iiyama T, Hideshima S, Sugimoto W

    ACS applied materials & interfaces ( ACS applied materials & interfaces )  14 ( 27 ) 31131 - 31139   2022.07 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Enhancement in the Charge-Transfer Kinetics of Pseudocapacitive Iridium-Doped Layered Manganese Oxide.

    Saito R, Tanaka H, Teshima K, Takimoto D, Hideshima S, Sugimoto W

    Inorganic chemistry ( AMER CHEMICAL SOC )  61 ( 11 ) 4566 - 4571   2022.03 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

     View Summary

    Birnessite manganese oxide is a promising candidate as an electrode material for aqueous supercapacitors owing to its pseudocapacitance associated with fast redox processes. While manganese oxides are semiconductive, the conductivity is much lower than that of typical materials used for capacitive electrodes such as activated carbon or ruthenium oxide. In an attempt to increase the electronic conductivity of birnessite, a new solid solution phase, K-y(Mn(1)(-x)Jr(x))O-2, was synthesized, and the electrochemical charge storage capability of Ir-doped birnessite was studied in aqueous Li2SO4. Structural characterization revealed that the single-phase K-y(Mn1-xIrx)O-2 could be synthesized up to x = 0.1. An increase in the pseudocapacitive charge was observed with the increase in Ir content. In addition to the increase in the pseudocapacitive charge, an unusual change in the peak potential was observed. The peakto-peak difference for the Mn4+/Mn3+ redox decreased with increasing Ir content, indicating an increase in the reversibility of the pseudocapacitive process. The decrease in peak-to-peak difference was observed only by Ir substitution and was not observed for physical mixtures of K0.28MnO2 and IrO2, suggesting a strong electronic interaction between the host Mn ion and the substituting Ir ion.

  • Fabrication of Three-Dimensional Porous Materials with NiO Nanowalls for Electrocatalytic Oxygen Evolution

    Daisuke Takimoto, Sho Hideshima, Wataru Sugimoto

    ACS APPLIED NANO MATERIALS ( AMER CHEMICAL SOC )  4 ( 8 ) 8059 - 8065   2021.08 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

     View Summary

    Nanosheets are two-dimensional (2D) nanocrystals that exhibit superior electrochemical performance. However, nanosheets are typically stacked horizontally toward the current collector, leading to poor utilization of individual nanosheets. Although most studies have fabricated three-dimensional (3D) structures using nanosheets, the wall thickness was a few hundred nanometers, suggesting that hundreds of nanosheets were restacked along the wall. In this study, we demonstrated the fabrication of a 3D structure constructed by NiO nanowalls with a thickness of 2-3 nm (3D-NiO). The specific surface area of 3D-NiO was found to be 42 m(2) g(-1), which is 2.6 times larger than that of NiO nanoparticles. The specific capacity of 3D-NiO was 2.5 times higher than that of NiO nanoparticles and could be attributed to the large specific surface area because of the nature of the thin nanowalls. The O-2-evolution reaction (OER) activity of 3D-NiO at 1.65 V vs RHE was sixfold greater than that of NiO nanoparticles. The enhanced OER activity of 3D-NiO could be attributed to both the large specific surface area and the fabrication of diffusion paths within the 3D structure. The OER activity of 3D-NiO after 500 cycles was four times higher than that of NiO nanoparticles. Our results show that the 3D structure fabricated with thin nanowalls is a promising porous material for capacitor electrodes and electrocatalysts for applications in electrolysis and fuel cells.

  • Platinum Group Metal-based Nanosheets: Synthesis and Application towards Electrochemical Energy Storage and Conversion

    Wataru Sugimoto, Daisuke Takimoto

    CHEMISTRY LETTERS ( CHEMICAL SOC JAPAN )  50 ( 6 ) 1304 - 1312   2021.06 [ Peer Review Accepted ]

    Type of publication: Research paper (other science council materials etc.)

     View Summary

    Advancement in synthetic materials chemistry has brought about a new family of two-dimensional nanostructures (nanosheets) which have a variety of promising applications. In particular, synthesis of platinum group metal (PGM) oxide nanosheets such as RuO2 and IrO2 and PGM nanosheets (Pt, Ru, Rh, Pd, etc) have attracted researchers owing to the advantages of nanosheets versus nanoparticles, and the wide range of applications that PGM materials may realize. This highlight review will provide a summary of state-of-the-art PGM nanosheets and a critical assessment on the possible applications of the innovative nanomaterials.

  • Direct preparation of core-shell platinum cathode in membrane electrode assembly catalyst layer for polymer electrolyte fuel cell

    Hiroshi Fukunaga, Kazuhiro Kachi, Daisuke Takimoto, Dai Mochizuki, Wataru Sugimoto

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY ( PERGAMON-ELSEVIER SCIENCE LTD )  45 ( 28 ) 14547 - 14551   2020.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

     View Summary

    Core-shell catalyst has been attracting attention as a low-Pt catalyst for PEFC cathode. However, its mass production method has not yet been established. In this paper, a novel method suitable for continuous production of low-platinum catalyst layer for PEFC is proposed. Catalyst layer of carbon-supported Pd@Pt core-shell catalyst (Pd@Pt/C) is fabricated by using Cu underpotential deposition (UPD) followed by surface-limited redox replacement (SLRR) directly to the porous catalyst layer made of Pd core (Pd/C). The distribution of Pt corresponded well with that of Pd throughout the catalyst layer, indicating that the core-shell reaction occurs in the entire catalyst layer. Pd@Pt/C shows 1.8 times higher mass activity than Pt/C, which is comparable to Pd@Pt/C prepared by conventional microgram-scale method. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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Presentations 【 display / non-display

  • Oxygen evolution reaction of NiO nanowalls with a three-dimensional framework

    滝本 大裕

    PRiME2020  2020.10  -  2020.10 

  • Synthesis of conductive nano-sized Magnéli-phase Ti4O7 with a core@shell structure

    Daisuke Takimoto, Y. Toda, S. Tominaka, D. Mochizuki, W. Sugimoto

    The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)  2019.10  -  2019.10 

  • Morphological effects on surface oxidation tolerance of metallic nanosheets

    Daisuke Takimoto, D. Mochizuki, S. Hideshima, W. Sugimoto, Q. Yuan, N. Takao, T. Itoh, T. V. T. Duy, T. Ohwaki, H. Imai

    236th ECS Meeting  2019.10  -  2019.10 

  • 燃料電池用電極触媒に向けたコアシェル構造を設けた金属ナノシートの調製

    滝本大裕, 望月大, 杉本渉

    中部化学関係学協会支部連合秋季大会講演予稿集  2018.11  -  2018.11 

  • Synthesis of Core-Shell Nanosheets Electrocatalysts for the Oxygen Reduction Reaction

    Daisuke Takimoto

    3rd International Conference on Emerging Advanced Nanomaterials  2018.10  -  2018.10 

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Academic Awards 【 display / non-display

  • 論文賞

    2020.12    

    Winner: Tomohiro YOSHIDA, Daisuke TAKIMOTO, Dai MOCHIZUKI, and Wataru SUGIMOTO

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

  • Synthesis of three-dimensional architecture composed of two-dimensional nanowalls

    Grant-in-Aid for Early-Career Scientists

    Project Year: 2018.04  -  2020.03 

    Investigator(s): Takimoto Daisuke 

    Direct: 2,300,000 (YEN)  Overheads: 2,990,000 (YEN)  Total: 690,000 (YEN)

     View Summary

    In this study, a new electrocatalyst with a three-dimensional architecture composed of a framework of NiO nanowalls was prepared. The electrocatalytic activity of three-dimensional architecture was higher than that of nanoparticles. The result strongly indicates that the 3D structure with 2D nanowall is a superior design for electrocatalyst. Considering the diffusion path of evolved molecules, the enhanced activity could also be attributed to the meso pore nature of 3D-NiO.

  • Grant-in-Aid for JSPS Fellows

    Project Year: 2016.04  -  2018.03 

    Direct: 2,300,000 (YEN)  Overheads: 2,300,000 (YEN)  Total: 0 (YEN)

  • Grant-in-Aid for JSPS Fellows

    Project Year: 2016.04  -  2018.03 

    Direct: 2,300,000 (YEN)  Overheads: 2,300,000 (YEN)  Total: 0 (YEN)

SDGs 【 display / non-display

  • 燃料電池・電気化学的浄水化技術