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@ARTICLE{Rodenbcher:872693,
      author       = {Rodenbücher, Christian and Szot, Kristof and Wrana,
                      Dominik and Jany, Benedykt R. and Krok, Franciszek and
                      Korte, Carsten},
      title        = {{L}ocalized electrochemical redox reactions in yttria
                      stabilized zirconia single crystals},
      journal      = {JPhys energy},
      volume       = {2},
      issn         = {2515-7655},
      address      = {Bristol},
      publisher    = {IOP Publishing},
      reportid     = {FZJ-2020-00183},
      pages        = {034008},
      year         = {2020},
      abstract     = {Herein, electroreduction in yttria-stabilized zirconia are
                      investigated by means of Hebb-Wagner polarization
                      experiments. By performing optical and thermal microscopy on
                      single crystals and thin films during the application of an
                      electric field under vacuum or oxygen-tight sealed
                      conditions, the movement of the reduction front from the
                      cathode to the anode, which causes a blackening of the
                      material, is monitored. When performing electrocoloration
                      experiments on thin film samples, the progressing reaction
                      of the blackened region was found to be inhomogeneous and
                      evolves as a dendrite-like finger structure. The progression
                      of the blackening fingers follow preferentially the electric
                      field lines and thus are influenced by distortions in the
                      field that can be caused by metallic particles embedded in
                      the oxide. In contrast to this, in the first stage of the
                      reduction process no significant influence of
                      mechanically-induced dislocations on the morphology or
                      kinetics on the electroreduction can be found. Only after a
                      heavy electroreduction was a localized transformation of the
                      surface region observed. There is an evolution of highly
                      oxygen deficient ZrOx regions, which have a characteristic
                      checked topography pattern at the microscale level.},
      cin          = {IEK-14},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-14-20191129},
      pnm          = {135 - Fuel Cells (POF3-135)},
      pid          = {G:(DE-HGF)POF3-135},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000569619500001},
      doi          = {10.1088/2515-7655/ab6b39},
      url          = {https://juser.fz-juelich.de/record/872693},
}