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A Single-Site Platinum CO Oxidation Catalyst in Zeolite KLTL: Microscopic and Spectroscopic Determination of the Locations of the Platinum Atoms

Authors

  • Dr. Joseph D. Kistler,

    1. Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, Davis, CA 95616 (USA)
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    • These authors contributed equally to this work.

  • Nutchapon Chotigkrai,

    1. Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, Davis, CA 95616 (USA)
    2. Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University (Thailand)
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    • These authors contributed equally to this work.

  • Pinghong Xu,

    1. Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, Davis, CA 95616 (USA)
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  • Dr. Bryan Enderle,

    1. Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, Davis, CA 95616 (USA)
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  • Prof. Dr. Piyasan Praserthdam,

    1. Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University (Thailand)
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  • Prof. Dr. Cong-Yan Chen,

    1. Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, Davis, CA 95616 (USA)
    2. Chevron Energy Technology Company, Richmond, CA 94802 (USA)
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  • Prof. Dr. Nigel D. Browning,

    1. Fundamental and Computational Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352 (USA)
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  • Prof. Dr. Bruce C. Gates

    Corresponding author
    1. Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, Davis, CA 95616 (USA)
    • Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, Davis, CA 95616 (USA)

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  • This work was supported by the Department of Energy (DOE) Basic Energy Science Grants FG02-04ER15513 and DE-SC0005822 and the Royal Golden Jubilee PhD program of the Thailand research fund. We acknowledge beam time and support of beamline 4–1 at the Stanford Synchrotron Radiation Lightsource (SSRL), supported by DOE, Office of Science, Basic Energy Sciences, Contract DE-AC02-76SF00515. We acknowledge support through the Laboratory Directed Research and Development Program Chemical Imaging Initiative at Pacific Northwest National Laboratory (PNNL) and the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by DOE’s Office of Biological and Environmental Research at PNNL. PNNL is a multiprogram national laboratory operated by Battelle for DOE under Contract DE-AC05-76L01830.

Abstract

A stable site-isolated mononuclear platinum catalyst with a well-defined structure is presented. Platinum complexes supported in zeolite KLTL were synthesized from [Pt(NH3)4](NO3)2, oxidized at 633 K, and used to catalyze CO oxidation. IR and X-ray absorption spectra and electron micrographs determine the structures and locations of the platinum complexes in the zeolite pores, demonstrate the platinum-support bonding, and show that the platinum remained site isolated after oxidation and catalysis.

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