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@ARTICLE{Bauer:866294,
      author       = {Bauer, Tanja and Maisel, Sven and Blaumeiser, Dominik and
                      Vecchietti, Julia and Taccardi, Nicola and Wasserscheid,
                      Peter and Bonivardi, Adrian and Görling, Andreas and
                      Libuda, Jörg},
      title        = {{O}perando {DRIFTS} and {DFT} {S}tudy of {P}ropane
                      {D}ehydrogenation over {S}olid- and {L}iquid-{S}upported
                      {G}a x {P}t y {C}atalysts},
      journal      = {ACS catalysis},
      volume       = {9},
      number       = {4},
      issn         = {2155-5435},
      address      = {Washington, DC},
      publisher    = {ACS},
      reportid     = {FZJ-2019-05453},
      pages        = {2842 - 2853},
      year         = {2019},
      abstract     = {Supported catalytically active liquid metal solutions
                      (SCALMS) represent a class of catalytic materials that have
                      only recently been developed, but have already proven to be
                      highly active, e.g., for dehydrogenation reactions. Previous
                      studies attributed the catalytic activity to isolated noble
                      metal atoms at the surface of a liquid and inert Ga matrix.
                      In this study, we apply diffuse reflectance infrared Fourier
                      transform spectroscopy (DRIFTS) with CO as a probe molecule
                      to Ga/Al2O3, Pt/Al2O3, and Ga37Pt/Al2O3 catalysts, to
                      investigate in detail the nature of the active Pt species.
                      Comparison of CO adsorption on Pt/Al2O3 and Ga37Pt/Al2O3
                      shows that isolated Pt atoms are, indeed, present at the
                      surface of the liquid SCALMS. Combining DRIFTS with online
                      gas chromatography (GC), we investigated the Ga/Al2O3,
                      Pt/Al2O3, and Ga37Pt/Al2O3 systems under operando conditions
                      during propane dehydrogenation in CO/propane and in
                      Ar/propane. We find that the Pt/Al2O3 sample is rapidly
                      poisoned by CO adsorption and coke, whereas propane
                      dehydrogenation over Ga37Pt/Al2O3 SCALMS leads to higher
                      conversion with no indication of poisoning effects. We show
                      under operando conditions that isolated Pt atoms are present
                      at the surface of SCALMS during the dehydrogenation
                      reaction. IR spectra and density-functional theory (DFT)
                      suggest that both the Ga matrix and the presence of
                      coadsorbates alter the electronic properties of the surface
                      Pt species.},
      cin          = {IEK-11},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-11-20140314},
      pnm          = {134 - Electrolysis and Hydrogen (POF3-134)},
      pid          = {G:(DE-HGF)POF3-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000464075700012},
      doi          = {10.1021/acscatal.8b04578},
      url          = {https://juser.fz-juelich.de/record/866294},
}