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@ARTICLE{Lenser:844946,
      author       = {Lenser, Christian and Lu, Qiyang and Crumlin, Ethan and
                      Bluhm, Hendrik and Yildiz, Bilge},
      title        = {{C}harge {T}ransfer {A}cross {O}xide {I}nterfaces {P}robed
                      by in {S}itu {X}-ray {P}hotoelectron and {A}bsorption
                      {S}pectroscopy {T}echniques},
      journal      = {The journal of physical chemistry / C},
      volume       = {122},
      number       = {9},
      issn         = {1932-7447},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2018-02285},
      pages        = {4841 - 4848},
      year         = {2018},
      abstract     = {The interface between two functional oxide materials
                      governs the physical, chemical, and electronic interactions
                      between the two phases. We investigate the charge transfer
                      across the interface between two structurally related
                      material classes, namely, perovskite and
                      Ruddlesden–Popper-type oxides, choosing
                      La0.8Sr0.2CoO3−δ (LSC) and Nd2NiO4+δ (NNO) as our model
                      systems for the two classes, respectively. The interface of
                      Nd2NiO4+δ and La0.8Sr0.2CoO3−δ is investigated using in
                      situ photoemission spectroscopy techniques on epitaxial thin
                      films. A detailed analysis of the electronic structure with
                      X-ray photoelectron spectroscopy and X-ray absorption
                      spectroscopy under an oxygen atmosphere and at elevated
                      temperature reveals charge transfer from La0.8Sr0.2CoO3−δ
                      into Nd2NiO4+δ. Through the use of electrical conductivity
                      relaxation, it is demonstrated that such charge transfer
                      from LSC into NNO is accompanied by a reduction in the
                      kinetics of oxygen exchange on Nd2NiO4+δ, contrary to
                      expectation. Fermi level pinning at the surface of
                      Nd2NiO4+δ is discussed as a possible cause for this
                      phenomenon. These insights add to the understanding of
                      material interaction necessary for the design of
                      next-generation high-performance electrochemical
                      components.},
      cin          = {IEK-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {135 - Fuel Cells (POF3-135)},
      pid          = {G:(DE-HGF)POF3-135},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000427331300012},
      doi          = {10.1021/acs.jpcc.7b10284},
      url          = {https://juser.fz-juelich.de/record/844946},
}