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@ARTICLE{Gunkel:837945,
      author       = {Gunkel, Felix and Jin, Lei and Müller, David and Hausner,
                      Clemens and Bick, Daniel S. and Jia, Chun-Lin and Schneller,
                      Theodor and Valov, Ilia and Waser, R. and Dittmann, Regina},
      title        = {{O}rdering and {P}hase {C}ontrol in {E}pitaxial
                      {D}ouble-{P}erovskite {C}atalysts for the {O}xygen
                      {E}volution {R}eaction},
      journal      = {ACS catalysis},
      volume       = {7},
      issn         = {2155-5435},
      address      = {Washington, DC},
      publisher    = {ACS},
      reportid     = {FZJ-2017-06706},
      pages        = {7029 - 7037},
      year         = {2017},
      abstract     = {The complex oxide compound praseodymium barium cobalt oxide
                      (PBCO) is an efficient catalyst for the oxygen evolution
                      reaction (OER) during electrochemical water splitting, with
                      an activity that is mainly ascribed to PBCO’s inherent
                      atomic structure and band alignment. Here, we report on
                      epitaxial PBCO thin films showing electrocatalytic
                      properties, with current densities of up to 10 mA/cm2 at 1.8
                      V vs RHE. Dense PBCO thin films are synthesized in a
                      disordered perovskite phase as well as in a coherently
                      oxygen vacancy ordered (double) perovskite phase, in which
                      oxygen vacancies are incorporated in every second CoO2−δ
                      atomic plane along the out-of-plane direction. The
                      transition from disordered to ordered growth occurs with
                      temperature control during the growth process and can be
                      directly monitored in situ by means of reflection
                      high-energy electron diffraction. The epitaxial fabrication
                      process allows the control of the structure and phase of the
                      oxide catalysts, providing model systems for exploring
                      structure–property relations and atomistic processes of
                      catalysis during the OER. For all structural compositions,
                      we demonstrate remarkably similar catalytic properties,
                      indicating a negligible effect of the structural bulk phase
                      on OER catalysis. Rational design routes for perovskite
                      catalysts derived merely from bulk properties should
                      therefore be met with suspicion.},
      cin          = {PGI-7 / JARA-FIT / IEK-9 / ER-C-1 / PGI-6},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)IEK-9-20110218 / I:(DE-Juel1)ER-C-1-20170209 /
                      I:(DE-Juel1)PGI-6-20110106},
      pnm          = {524 - Controlling Collective States (POF3-524)},
      pid          = {G:(DE-HGF)POF3-524},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000412795700071},
      doi          = {10.1021/acscatal.7b02036},
      url          = {https://juser.fz-juelich.de/record/837945},
}