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2021 Fiscal Year Annual Research Report

Ionic control of mixed-anion compounds and reduced oxides using electric field

Research Project

Project/Area Number 19F19334
Research InstitutionKyoto University

Principal Investigator

陰山 洋  京都大学, 工学研究科, 教授 (40302640)

Co-Investigator(Kenkyū-buntansha) LI HAOBO  京都大学, 工学(系)研究科(研究院), 外国人特別研究員
Project Period (FY) 2019-10-11 – 2022-03-31
KeywordsIonic manipulation / Electric-field control / Phase transition / Topochemical reaction / Proton insertion / Complex oxide / Mixed-anions / Thin film
Outline of Annual Research Achievements

Our work shows that using the electrochemical protonation and associated dehydration reaction paves out a novel route to explore reduced metal oxides. The dehydration is also simple but effective. It is quite similar as the general dehydration occurs in ATP or alcohol synthesis, where the bonding oxygen is removed and new bonding and structure are formed. However, the electric-field provides additional energy to weaken the metal-oxygen hybridization. Thus, the lattice oxygen can be easily released from the system under heating, when these oxygen ions cannot be removed by other methods.
The obtained SrCoO2 exhibits unique 4-legged spin-tube structure, which cannot be obtained by well-known reduction reactions. Considering the electrochemical protonation is well explored in many oxides, large number of precursors can be considered to explore their products after dehydration. Even for known oxyhydride, electrochemical protonation might further reduce these compounds and H2 releasing instead of H2O can be expected. More importantly, the proton injection/dehydration could be expanded to all types of materials and this will eventually reveal large number of undiscovered structures and associated exotic properties.
In the final fiscal year of this funding, our results were accepted by Journal of the American Chemical Society (J. Am. Chem. Soc. 2021, 143, 42, 17517-17525). The related results will be also presented in JSAP 69th conference in 2022 Spring.

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

  • Research Products

    (1 results)

All 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results)

  • [Journal Article] Dehydration of Electrochemically Protonated Oxide: SrCoO<sub>2</sub> with Square Spin Tubes2021

    • Author(s)
      Li Hao-Bo、Kobayashi Shunsuke、Zhong Chengchao、Namba Morito、Cao Yu、Kato Daichi、Kotani Yoshinori、Lin Qianmei、Wu Maokun、Wang Wei-Hua、Kobayashi Masaki、Fujita Koji、Tassel C?dric、Terashima Takahito、Kuwabara Akihide、Kobayashi Yoji、Takatsu Hiroshi、Kageyama Hiroshi
    • Journal Title

      Journal of the American Chemical Society

      Volume: 143 Pages: 17517~17525

    • DOI

      10.1021/jacs.1c07043

    • Peer Reviewed

URL: 

Published: 2022-12-28  

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