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An attempt to bridge the pressure and material gap with a disperse model catalyst for low-temperature alkane reforming

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Abstract

Pt black was exposed to n>-hexane/H2 mixtures between 483 and 663 K followed by O2 and H2 treatments at 603 K. XP and UP spectra were measured without exposing the samples to air. 20–30% carbon accumulated after hydrocarbon exposures. O2 removed most carbon. The surface C content increased after a subsequent contact with H2, C 1s showing more “atomic carbon” as opposed to graphite after n-hexane exposure. Anisotropic recrystallization of Pt black favoring (220) and (311) lattice planes occurred under hydrogen-rich conditions. Both findings were attributed to a H2-induced solid-state rearrangement; H atoms penetrating into the crystal lattice, force subsurface carbon and oxygen atoms to the surface and a concomitant restructuring would occur. Thus another “hydrogen effect” has been recognized, leading to structures favorable for skeletal reactions of alkanes.

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Authors and Affiliations

  1. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195, Berlin, Germany

    J. Find, R. Schlögl & U. Wild

  2. Institute of Isotope and Surface Chemistry, Chemical Research Center, Hungarian Academy of Sciences, PO Box 77, H-1525, Budapest, Hungary

    Z. Paál

Authors
  1. J. Find
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  2. Z. Paál
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  3. R. Schlögl
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  4. U. Wild
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Find, J., Paál, Z., Schlögl, R. et al. An attempt to bridge the pressure and material gap with a disperse model catalyst for low-temperature alkane reforming. Catalysis Letters 65, 19–23 (2000). https://doi.org/10.1023/A:1019037926168

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