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@PHDTHESIS{Park:1032270,
      author       = {Park, Seongeun},
      title        = {{D}evelopment of {I}ridium-based {N}anostructures for
                      {O}xygen {E}volution {R}eaction in {PEM} {W}ater
                      {E}lectrolysis},
      volume       = {642},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2024-06109},
      isbn         = {978-3-95806-779-0},
      series       = {Reihe Energie $\&$ Umwelt / Energy $\&$ Environment},
      pages        = {135},
      year         = {2024},
      note         = {Dissertation, RWTH Aachen University, 2024},
      abstract     = {Hydrogen is an important energy carrier in the coming
                      future for sustainable energy systems. In particular, "green
                      hydrogen" produced by water electrolysis is considered as an
                      ultimate technology as it can greatly contribute to net-zero
                      CO2 emission. Accordingly, many green hydrogen targets and
                      policies are being set around the world. The EU has
                      announced plans to install 40 GW of green hydrogen
                      electrolysis capacity in Europe by 2030, and Germany plans
                      to produce up to 14 TWh of green hydrogen by 2030.1,2
                      Polymer electrolyte membrane (PEM) water electrolysis is the
                      most promising system in the field of water electrolyzers
                      because it offers advantages such as a wide operating range,
                      high current density, and compact system design. It is
                      expected to contribute to the production of green hydrogen,
                      but unfortunately, the cost still needs to be reduced
                      tremendously. Electrocatalysts are the most important part
                      to focus on as they are based on platinum group metals
                      (PGMs) and have the potential to reduce the high cost. In
                      particular, iridium, the electrocatalyst for the anode side,
                      is one of the scarcest elements, and its price is
                      continuously increasing with significant fluctuations due to
                      demand and limited production, which may be a bottleneck for
                      large-scale application of PEM water electrolyzers. In this
                      work, the electrocatalysts for oxygen evolution reactions
                      for PEM water electrolysis were explored. Novel
                      nanostructures were synthesized and evaluated as
                      electrocatalysts under acidic conditions. Since iridium is
                      the only element that has reasonable electrocatalytic
                      activity and stability, they are based on iridium as the
                      main element and the research is focused on the better
                      utilization of iridium in electrocatalysts from the
                      structure point of view. The approach was followed by using
                      transition metals to develop the catalyst structure,
                      considering realistic conditions such as material cost. The
                      electrocatalysts were analyzed and studied before and after
                      electrochemical measurements.},
      cin          = {IET-4},
      cid          = {I:(DE-Juel1)IET-4-20191129},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:0001-20241209143003210-7245613-9},
      doi          = {10.34734/FZJ-2024-06109},
      url          = {https://juser.fz-juelich.de/record/1032270},
}