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@ARTICLE{Rakousky:851409,
      author       = {Rakousky, Christoph and Shviro, Meital and Carmo, Marcelo
                      and Stolten, Detlef},
      title        = {{I}ridium {N}anoparticles for the {O}xygen {E}volution
                      {R}eaction: {C}orrelation of {S}tructure and {A}ctivity of
                      {B}enchmark {C}atalyst {S}ystems},
      journal      = {Electrochimica acta},
      volume       = {302},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2018-05058},
      pages        = {472-477},
      year         = {2019},
      abstract     = {The rotating disk electrode (RDE) is a well-known and
                      established electrochemical tool for evaluating typical
                      powdery electrocatalyst platforms such as platinum supported
                      on carbon black. Unfortunately, the same cannot be said of
                      the iridium-based catalysts typically used in polymer
                      electrolyte membrane (PEM) water electrolyzers. The
                      challenge essentially relies on three aspects: a) high
                      anodic overpotentials which fatally destroy any electrode
                      substrate; b) low loading RDE-inks for catalyst screenings
                      may show strong sedimentation c) iridium does not show
                      defined peaks during cyclic voltammetry. With this work, a
                      newly developed method is presented which allows the
                      characterization of the electrocatalytic properties of
                      iridium based electrocatalysts in a true RDE configuration.
                      Here we aimed to access the electrochemistry of various
                      commercial iridium-based catalysts with different
                      structures. We show that the stability of glassy carbon RDE
                      and of carbon black, added to the ink in order to stabilize
                      the dispersion is sufficient during the electrochemical
                      testing protocol used. Reproducibility of activity results
                      obtained on various samples is increased by stabilizing the
                      dispersions with carbon black, resulting in reproducible and
                      homogeneous catalyst thin films.},
      cin          = {IEK-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-3-20101013},
      pnm          = {134 - Electrolysis and Hydrogen (POF3-134)},
      pid          = {G:(DE-HGF)POF3-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000459998000052},
      doi          = {10.1016/j.electacta.2018.11.141},
      url          = {https://juser.fz-juelich.de/record/851409},
}