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XAFSによるガス吸着電極材料表面ナノ深さ領域のイオニクス現象解明

Research Project

Project/Area Number 19017003
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionTohoku University

Principal Investigator

篠田 弘造  Tohoku University, 多元物質科学研究所, 准教授 (10311549)

Co-Investigator(Kenkyū-buntansha) 鈴木 茂  東北大学, 多元物質科学研究所, 教授 (40143028)
Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥8,400,000 (Direct Cost: ¥8,400,000)
Fiscal Year 2008: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 2007: ¥3,600,000 (Direct Cost: ¥3,600,000)
Keywords燃料電池 / 表面・界面構造 / イオニクス / 深さ分解分析 / X線吸収分光 / 非化学量論組成 / 斜出射蛍光収量XAFS / 転換電子収量XAFS / X線光電子分光
Research Abstract

固体酸化物型燃料電池(SOFC)において電極や固体電解質の特性を左右する、表面・界面のナノ領域における構造および電子状態を調べるため、表面敏感蛍光収量X線吸収分光(FY-XAS)、およびX線光電子分光(XPS)を適用し、実働環境に近いin-situ環境下での測定およびその解析を通じて「表面・界面領域の局所構造・電子状態とイオン伝導特性等物性との関連」を明らかにし、電極・電解質材料開発に資する有用情報を得ることを目的として、本年度の研究を遂行した。(La, Sr)MnO_3系酸化物薄膜を主な対象試料とした。角度分解XPS分析を行った結果、高温環境への暴露後にSrの薄膜表面への濃縮を確認した。一方、斜出射検出蛍光X線強度の出射角依存性から試料表面領域の深さ分解蛍光X線分析が、さらにその入射X線エネルギーに対するスペクトルから深さ分解局所構造・化学状態分析が可能であることを確認し、高温環境下、低酸素分圧環境下、電気的ポテンシャル印加環境下in-situ測定から、各条件において薄膜中Mnの化学状態が全体的に異なっているだけでなく、その表面近傍数十nmの領域で変化していることを見出した。またこの変化は単なるMn酸化数の変化ではなく、異なる作製法で得られた薄膜間でその変化の度合いが大きく異なっていることがわかった。

Report

(2 results)
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (24 results)

All 2009 2008 2007

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (16 results) Book (1 results)

  • [Journal Article] Nondestructive Depth Resolved Analysis by using Grazing Exit Fluorescence-Yield X-ray Absorption Spectroscopy2009

    • Author(s)
      K. Shinoda, S. Sato, S. Suzuki, T. Uruga, H. Tanida, H. Toyokawa, Y. Terada, and Y. Takagaki
    • Journal Title

      Journal of Surface Analysis 15

      Pages: 295-298

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization of Surface Oxide Layers Formed on Fe-Al Alloys by Annealing under Different Atmospheres2008

    • Author(s)
      S. Suzuki, T. Yamamoto, K. Shinoda and S. Sato
    • Journal Title

      Surface and Interface Analysis 40

      Pages: 311-314

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chemical State of Chromium in CaO-Si0_2 Base Oxides Annealed under Different Conditions2008

    • Author(s)
      K. Shinoda, H. Hatakeda, N. Maruoka, H. Shibata, S. Kitamura and S. Suzuki
    • Journal Title

      ISIJ International 48

      Pages: 1404-1408

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Changes in Chemical State and Local Structure of Green Rust by Addition of Copper Sulphate Ions2008

    • Author(s)
      S. Suzuki, K. Shinoda, M. Sato, S. Fujimoto, M. Yamashita, H. Konishi, T. Doi, T. Kamimura, K. Inoue and Y. Waseda
    • Journal Title

      Corrosion Science 50

      Pages: 1761-1765

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of Anion Coexistence of Crystal Structure of Iron Oxides Deposited from Steel Surfaces2008

    • Author(s)
      K. Shinoda, S.-K. Kwon, S. Suzuki and Y. Waseda
    • Journal Title

      e-Journal of Surface Science and Nanotechnology 6

      Pages: 60-63

    • NAID

      130004933977

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of Anion Coexistence on Crystal Structure of Iron Oxides Deposited from Steel Surfaces2008

    • Author(s)
      K. Shinoda
    • Journal Title

      e-Journal of Surface Science and Nanotechnology 6

      Pages: 60-63

    • NAID

      130004933977

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Local Structural Studies of Directly Synthesized L1_0 FePt Nanoparticles by Using XRD, XAS and ASAXS2007

    • Author(s)
      K. Shinoda
    • Journal Title

      Journal of Magnetism and Magnetic Materials 310

      Pages: 2387-2389

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] X線吸収分光を利用した雰囲気を選ばない元素識別・表面深さ分解化学状態分析2008

    • Author(s)
      篠田弘造
    • Organizer
      金研ワークショップ「素材産業に関係する新しい分析・解析技術」
    • Place of Presentation
      仙台
    • Year and Date
      2008-12-10
    • Related Report
      2008 Annual Research Report
  • [Presentation] 深さ分会XAFSによるFe基合金の非破壊表面分析2008

    • Author(s)
      篠田弘造、鈴木茂、宇留賀朋哉、谷田肇
    • Organizer
      日本金属学会東北支部研究発表大会
    • Place of Presentation
      名取
    • Year and Date
      2008-11-29
    • Related Report
      2008 Annual Research Report
  • [Presentation] 深さ分解X線吸収分光によるFe-Mn合金表面の元素濃集および酸化層の解析2008

    • Author(s)
      篠田弘造、山本孝充、鈴木茂
    • Organizer
      2008実用表面分析講演会
    • Place of Presentation
      仙台
    • Year and Date
      2008-10-14
    • Related Report
      2008 Annual Research Report
  • [Presentation] 鉄鋼材料の表面・界面における元素濃化と関連特性2008

    • Author(s)
      鈴木茂
    • Organizer
      2008実用表面分析講演会
    • Place of Presentation
      仙台
    • Year and Date
      2008-10-14
    • Related Report
      2008 Annual Research Report
  • [Presentation] Characterization of Manganese Oxide Enriched in Surface Layers of Fe-Mn Alloys2008

    • Author(s)
      K. Shinoda, T. Yamamoto, S. Suzuki, T. Uruga, H. Tanida, H. Toyokawa, Y. Terada, Y. Takagaki
    • Organizer
      The 10th International Symposium on Multiscale, Multifumnctional and Functionally Graded Materials(MM&FGM2008)
    • Place of Presentation
      Sendai, Japan
    • Year and Date
      2008-09-23
    • Related Report
      2008 Annual Research Report
  • [Presentation] X線分光法による五a_<1-x>Sr_xMnO_<3+δ>系燃料電池用電極材料に含まれる元素の化学状態分析2008

    • Author(s)
      柳瀬宏貴、篠田弘造、八代圭司、水崎純一郎、鈴木茂
    • Organizer
      日本金属学会秋期大会
    • Place of Presentation
      熊本
    • Year and Date
      2008-09-23
    • Related Report
      2008 Annual Research Report
  • [Presentation] 2 Dimensional Position Sensitive XAFS by Using In-house X-ray Spectrometer2008

    • Author(s)
      K. Shinoda, S. Suzuki, M. Kuribayashi, T. Taguchi
    • Organizer
      The 9th International Conference on X-ray Micros copy(XRM 2008)
    • Place of Presentation
      Zurich, Switzerland
    • Year and Date
      2008-07-23
    • Related Report
      2008 Annual Research Report
  • [Presentation] 複合酸化物中におけるMnの化学状態分析2008

    • Author(s)
      柳瀬宏貴、篠田弘造、八代圭司、水崎純一郎、鈴木茂
    • Organizer
      資源・素材学会東北支部春季大会
    • Place of Presentation
      仙台
    • Year and Date
      2008-05-30
    • Related Report
      2008 Annual Research Report
  • [Presentation] XPSおよびXAFSによる固体酸化物燃料電池空気極材料中Mnの電子状態解2008

    • Author(s)
      柳瀬宏貴
    • Organizer
      日本金属学会2008年春期大会
    • Place of Presentation
      東京(武蔵工業大学)
    • Year and Date
      2008-03-26
    • Related Report
      2007 Annual Research Report
  • [Presentation] Analysis of SiO2 Films on Si Substrate by GDOES Depth Profiling2007

    • Author(s)
      S. Suzuki
    • Organizer
      The 16th International Conference on Secondary Iron Mass Spectrometry
    • Place of Presentation
      Kanazawa (Ishikawa Ongakudo)
    • Year and Date
      2007-11-26
    • Related Report
      2007 Annual Research Report
  • [Presentation] Enrichment of Alloys Elements on teh Surface on Iron Based Alloys by Annealing under Low Partial Pressure of Oxygen2007

    • Author(s)
      T. Yamamoto
    • Organizer
      6th International Symposium on Atomic Level Characterizations for New Materials and Devices'07
    • Place of Presentation
      Kanazawa (Kanazawa Art Hall)
    • Year and Date
      2007-10-30
    • Related Report
      2007 Annual Research Report
  • [Presentation] Influence of Anion Coexistence on Crystal Structure of Iron Oxides Deposited form Steel Surfaces2007

    • Author(s)
      K. Shinoda
    • Organizer
      6th International Symposium on Atomic Level Characterizations for New Materials and Devices'07
    • Place of Presentation
      Kanazawa (Kanazawa Art Hall)
    • Year and Date
      2007-10-30
    • Related Report
      2007 Annual Research Report
  • [Presentation] SIMS Depth Profiles of Surface Layers Formed in Cu-based Alloys2007

    • Author(s)
      S. Suzuki
    • Organizer
      The 16th International Conference on Secondary Iron Mass Spectronmetry
    • Place of Presentation
      Kanazawa (Ishikawa Ongakudo)
    • Year and Date
      2007-10-29
    • Related Report
      2007 Annual Research Report
  • [Presentation] Characterization of Surface Oxide Films Formed on Iron-Aluminum Alloys by Annealing under Different Atmospheres2007

    • Author(s)
      S. Suzuki
    • Organizer
      12th European Conference on Application of Surface and Interface Analysis (ECASIA'07)
    • Place of Presentation
      Brussels (Belgium)
    • Year and Date
      2007-09-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] 2次元検出器を用いた位置敏感ラボXAFS測定の試み2007

    • Author(s)
      篠田弘造
    • Organizer
      第10回XAFS討論会
    • Place of Presentation
      札幌(JSTイノベーションプラザ北海道)
    • Year and Date
      2007-07-26
    • Related Report
      2007 Annual Research Report
  • [Presentation] FeCoナノ粒子における規則/不規則結晶相の温度依存性2007

    • Author(s)
      篠田弘造
    • Organizer
      第5回ナノ学会
    • Place of Presentation
      つくば(つくば国際会議場)
    • Year and Date
      2007-05-21
    • Related Report
      2007 Annual Research Report
  • [Book] メタルバイオテクノロジーによる環境保全と資源回収一新元素戦略の新しいキーテクノロジー-(第7章メタルバイオをサポートする金属類の分析技術)2008

    • Author(s)
      篠田弘造(植田充美、池道彦監修)
    • Total Pages
      291
    • Publisher
      シーエムシー出版
    • Related Report
      2008 Annual Research Report

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Published: 2007-04-01   Modified: 2018-03-28  

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