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@ARTICLE{Jin:912374,
      author       = {Jin, Lei and Zhang, Feng and Gunkel, Felix and Wei,
                      Xian-Kui and Zhang, Yanxing and Wang, Dawei and Barthel,
                      Juri and Dunin-Borkowski, Rafal E. and Jia, Chun-Lin},
      title        = {{U}nderstanding {S}tructural {I}ncorporation of {O}xygen
                      {V}acancies in {P}erovskite {C}obaltite {F}ilms and
                      {P}otential {C}onsequences for {E}lectrocatalysis},
      journal      = {Chemistry of materials},
      volume       = {34},
      number       = {24},
      issn         = {0897-4756},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2022-05565},
      pages        = {10373–10381},
      year         = {2022},
      abstract     = {Owing to their excellent mixed-ionic and electronic
                      conductivity, fast oxygen kinetics, and cost efficiency,
                      layered oxygen-deficient perovskite oxides hold great
                      potential as highly efficient cathodes for solid oxide fuel
                      cells and anodes for water oxidation. Under working
                      conditions, cation ordering is believed to substantially
                      enhance oxygen diffusion while maintaining structural
                      stability owing to the formation of double perovskite (DP),
                      thus attracting extensive research attention. In contrast,
                      the incorporation of oxygen vacancies and the associated
                      vacancy ordering have rarely been studied at the atomic
                      scale, despite their decisive roles in regulating the
                      electronic and spin structures as well as in differentiating
                      the crystal structure from DP. Here, atomic-resolution
                      transmission electron microscopy is used to directly image
                      oxygen vacancies and measure their concentration in
                      (Pr,Ba)CoO3-δ films grown on SrTiO3 substrates. We find
                      that accompanied by the presence of oxygen vacancy ordering
                      at Co–O planes, the A–O (A = Pr/Ba) planes also exhibit
                      a breathing-like lattice modulation. Specifically, as
                      confirmed by first-principle calculations, the AO–AO
                      interplanar spacings are found to be linearly correlated
                      with the vacancy concentration in the enclosing Co–O
                      planes. On this basis, potential consequences of oxygen
                      occupancy for the catalytic properties of structurally pure
                      PBCO phases are discussed. Through establishing a simple
                      correlation of oxygen concentration with the easily
                      achievable lattice measurement, our results pave a way for
                      better understanding the structure–performance
                      relationship of oxygen-deficient complex cobaltites used for
                      electrocatalysis.},
      cin          = {ER-C-1 / PGI-7},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ER-C-1-20170209 / I:(DE-Juel1)PGI-7-20110106},
      pnm          = {5351 - Platform for Correlative, In Situ and Operando
                      Characterization (POF4-535) / 5233 - Memristive Materials
                      and Devices (POF4-523)},
      pid          = {G:(DE-HGF)POF4-5351 / G:(DE-HGF)POF4-5233},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000892094900001},
      doi          = {10.1021/acs.chemmater.2c02043},
      url          = {https://juser.fz-juelich.de/record/912374},
}