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@ARTICLE{Mller:206533,
      author       = {Müller, Patrick and Hejral, Uta and Rütt, Uta and
                      Stierle, Andreas},
      title        = {{I}n situ {O}xidation study of {P}d-{R}h {N}anoparticles on
                      ${M}g{A}l_2{O}_4$(001)},
      journal      = {Physical chemistry, chemical physics},
      volume       = {16},
      number       = {27},
      issn         = {1463-9084},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {PUBDB-2015-00997},
      pages        = {13866 - 13874},
      year         = {2014},
      note         = {(c) the Owner Societies. Post referee full text in
                      progress. Embargo full text 1 year from 19 May 2014.},
      abstract     = {Alloy nanoparticles on oxide supports are widely used as
                      heterogeneous catalysts in reactions involving oxygen. Here
                      we discuss the oxidation behavior of Pd–Rh alloy
                      nanoparticles on MgAl2O4(001) supports with a particle
                      diameter from 6–11 nm. As an In situ tool, we employed
                      high energy grazing incidence X-ray diffraction at a photon
                      energy of 85 keV. We find that physical vapor deposited
                      Pd–Rh nanoparticles grow epitaxially on MgAl2O4(001) with
                      a truncated octahedral shape over the whole concentration
                      range. During our systematic oxidation experiments performed
                      at 670 K in the pressure range from $10^−3$ to 0.1 mbar,
                      we observe for Rh containing nanoparticles the formation of
                      two different Rh oxide phases, namely RhO2 and a spinel-like
                      Rh3O4 phase. PdO formation is only observed for pure Pd
                      nanoparticles. This oxidation induced segregation behavior
                      is also reflected in the oxidation induced enlargement of
                      the average nanoparticle lattice parameter towards to value
                      for pure Pd. Our results have ramifications for the phase
                      separation behavior of alloy nanocatalysts under varying
                      reducing and oxidizing environments.},
      cin          = {FS-NL / FS-PE},
      ddc          = {540},
      cid          = {I:(DE-H253)FS-NL-20120731 / I:(DE-H253)FS-PE-20120731},
      pnm          = {PETRA Beamline P07 (POF2-54G14)},
      pid          = {G:(DE-H253)POF2-P07-20130405},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000338116700038},
      pubmed       = {pmid:24894349},
      doi          = {10.1039/c4cp01271b},
      url          = {https://bib-pubdb1.desy.de/record/206533},
}