In-situ Observation of Nano-Particulate Gold Catalysts by Closed-Type Environmental Transmission Electron Microscope

  • Kawasaki Tadahiro
    名古屋大学大学院工学研究科電子情報システム専攻 ナノ材料科学環境拠点(GREEN) 現所属:一般財団法人ファインセラミックスセンター ナノ構造研究所
  • Murase Hiroki
    名古屋大学大学院工学研究科電子情報システム専攻
  • Imaeda Norihiro
    名古屋大学大学院工学研究科電子情報システム専攻
  • Zipeng Cui
    名古屋大学大学院工学研究科電子情報システム専攻
  • Miura Takuya
    名古屋大学大学院工学研究科電子情報システム専攻
  • Matsutani Takaomi
    近畿大学理工学部電気電子工学科
  • Tanji Takayoshi
    名古屋大学エコトピア科学研究所 ナノ材料科学環境拠点(GREEN)

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Other Title
  • 隔膜型環境セル電子顕微鏡によるナノ金触媒その場観察
  • カクマクガタ カンキョウ セル デンシ ケンビキョウ ニ ヨル ナノキン ショクバイ ソノ バ カンサツ

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Abstract

<p>We have developed a closed-type environmental-cell (E-cell) transmission electron microscope (TEM) enabling to observe catalyst specimens reacted at ambient conditions. As a part of the developed system, a coaxial-type gas-flow specimen holder has been invented. A hybrid membrane has been also developed as a window material of the E-cell, which consists of an amorphous carbon film and a silicon nitride thin layer. The membrane showed high performances such as less deterioration of spatial resolution, high toughness for pressure difference, and high stability for electron beam irradiation. As an application of our developed system, nanoparticulate gold catalysts supported on TiO2 anatase substrates were observed dynamically at a condition of a selective oxidation of propylene. In-situ observations by the E-cell TEM revealed that product materials of catalytic reaction were formed from the perimeters of the gold/TiO2 interfaces.</p>

Journal

  • KENBIKYO

    KENBIKYO 49 (2), 93-97, 2014-08-30

    The Japanese Society of Microscopy

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