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    Design of a new reactor-like high temperature near ambient pressure scanning tunneling microscope for catalysis studies

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    Tao-scanning_microscope2013.pdf (1.811Mb)
    Issue Date
    2013
    Author
    Tao, Franklin Feng
    Nguyen, Luan
    Zhang, Shiran
    Publisher
    American Institute of Physics
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    Here, we present the design of a new reactor-like high-temperature near ambient pressure scanning tunneling microscope (HT-NAP-STM) for catalysis studies. This HT-NAP-STM was designed for exploration of structures of catalyst surfaces at atomic scale during catalysis or under reaction conditions. In this HT-NAP-STM, the minimized reactor with a volume of reactant gases of ∼10 ml is thermally isolated from the STM room through a shielding dome installed between the reactor and STM room. An aperture on the dome was made to allow tip to approach to or retract from a catalyst surface in the reactor. This dome minimizes thermal diffusion from hot gas of the reactor to the STM room and thus remains STM head at a constant temperature near to room temperature, allowing observation of surface structures at atomic scale under reaction conditions or during catalysis with minimized thermal drift. The integrated quadrupole mass spectrometer can simultaneously measure products during visualization of surface structure of a catalyst. This synergy allows building an intrinsic correlation between surface structure and its catalytic performance. This correlation offers important insights for understanding of catalysis. Tests were done on graphite in ambient environment, Pt(111) in CO, graphene on Ru(0001) in UHV at high temperature and gaseous environment at high temperature. Atom-resolved surface structure of graphene on Ru(0001) at 500 K in a gaseous environment of 25 Torr was identified.
    Description
    This is the published version. ©Copyright 2013 American Institute of Physics
    URI
    http://hdl.handle.net/1808/18748
    DOI
    https://doi.org/10.1063/1.4792673
    Collections
    • Chemical and Petroleum Engineering Scholarly Works [153]
    Citation
    Tao, Franklin (Feng), Luan Nguyen, and Shiran Zhang. "Design of a New Reactor-like High Temperature near Ambient Pressure Scanning Tunneling Microscope for Catalysis Studies." Rev. Sci. Instrum. Review of Scientific Instruments 84.3 (2013): 034101. http://dx.doi.org/10.1063/1.4792673

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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