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@INPROCEEDINGS{Kwati:1017831,
      author       = {Kwati, Leonard and Staykov, Aleksandar and Wiff, Juan Paulo
                      and Meulenberg, Wilhelm and Matsumoto, Hiroshige},
      title        = {{C}atalytic {A}ctivity of {L}n{C}o 0.5 {N}i 0.5 {O} 3-Δ
                      ({L}n = {L}a, {P}r, {N}d) '{P}ositrodes' on {C}eramic
                      {P}rotonic {E}lectrolytes},
      issn         = {2151-2043},
      reportid     = {FZJ-2023-04354},
      year         = {2023},
      abstract     = {Proton-conducting solid-oxide electrolyzers and fuel cells
                      represent viable, intermediate-temperature green energy
                      conversion and storage technologies. Interest in this class
                      of materials as electrolytes stems from their high ionic
                      conductivity and inherent advantages in the gas flow
                      configuration over traditional solid oxide cells in which
                      the electrolyte is an oxygen ion conductor. However, their
                      commercial viability has been hindered, in part, by the
                      development of corresponding single-phase electrode
                      components with mixed proton-electron conductivity and
                      effective catalytic activity toward oxygen reduction and
                      evolution reactions (ORR/OER). This paper investigates the
                      origin of catalytic activity in LnCo0.5Ni0.5O3-δ (Ln=La, Pr
                      and Nd) perovskites positrodes (positive electrode) by low
                      energy-ion scattering (LEIS) and DFT studies. LEIS results
                      reveal that La, Pr, and Pr cations dominate the outer atomic
                      layer, with profound implications for catalytic activity.
                      Whereas First principle calculations were performed using
                      the plane-wave DFT method and hybrid HSE06 functional
                      suggest, the catalytic activity and electronic properties
                      depend on the valence shell structure of the Ln-site cation
                      and their redox properties.},
      month         = {May},
      date          = {2023-05-28},
      organization  = {Electrochemical Society Meeting
                       Abstracts 243, Boston (USA), 28 May
                       2023 - 2 Jun 2023},
      cin          = {IEK-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {1232 - Power-based Fuels and Chemicals (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1232},
      typ          = {PUB:(DE-HGF)1},
      doi          = {10.1149/MA2023-01402826mtgabs},
      url          = {https://juser.fz-juelich.de/record/1017831},
}