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@ARTICLE{Baeumer:894928,
      author       = {Baeumer, Christoph and Liang, Allen Yu-Lun and Trstenjak,
                      Urška and Lu, Qiyang and Waser, Rainer and Mefford, J.
                      Tyler and Gunkel, Felix and Nemšák, Slavomír and Chueh,
                      William C.},
      title        = {{C}arbonate formation lowers the electrocatalytic activity
                      of perovskite oxides for water electrolysis},
      journal      = {Journal of materials chemistry / A},
      volume       = {9},
      number       = {35},
      issn         = {2050-7496},
      address      = {London},
      publisher    = {RSC},
      reportid     = {FZJ-2021-03487},
      pages        = {19940-19948},
      year         = {2021},
      abstract     = {The study of oxide electrocatalysts is often complicated by
                      the formation of complex and unknown surface species as well
                      as the interaction between the catalysts and common support
                      materials. Because unknown surface species may result from
                      air exposure, we developed a clean transfer system for the
                      air-free electrochemical investigation of epitaxial thin
                      films fabricated under typical surface science conditions.
                      LaNiO3 electrocatalysts exposed to ambient air exhibit a
                      lower activity towards the oxygen evolution reaction than
                      samples probed without air exposure. We demonstrate that
                      this decrease in activity is connected to an alteration of
                      the chemical environment of the electrocatalytically active
                      sites through carbonate formation on exposure to CO2. Our
                      study therefore shows that (1) the effects of air exposure
                      must be considered for transition metal oxide catalysts and
                      (2) that for the perovskite oxide LaNiO3 the clean surface
                      is more active than the air-exposed surface.},
      cin          = {PGI-7 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {5233 - Memristive Materials and Devices (POF4-523)},
      pid          = {G:(DE-HGF)POF4-5233},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000670013400001},
      doi          = {10.1039/D1TA03205D},
      url          = {https://juser.fz-juelich.de/record/894928},
}