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@INPROCEEDINGS{Hilche:1048451,
      author       = {Hilche, Tobias and Fröhlich, Kristina and Karl, André and
                      Jodat, Eva and Eichel, Rüdiger-A.},
      title        = {{S}canning {E}lectrochemical {M}icroscopy {S}tudy on
                      {M}odel {E}x-situ {T}reatment of {MEA} {A}nodes for {PEM}
                      {W}ater {E}lectrolysis},
      reportid     = {FZJ-2025-04657},
      year         = {2025},
      abstract     = {Polymer electrolyte membrane (PEM) water electrolysis[1] is
                      a key technology for sustainable hydrogen production as a
                      resource and for energy storage at industrial scale. The
                      central component of PEM water electrolyzers is the membrane
                      electrode assembly (MEA), which defines the performance
                      efficiency and lifetime of the electrolysis cell from an
                      electrochemical perspective. A typical approach to the
                      assessment of MEA durability is the accelerated stress test
                      (AST).[2] ASTs have been established as a short time
                      approximation to the degradation process of MEAs under
                      realistic operating conditions. However, by nature of design
                      the impact of different stressors in early, mid and late
                      stages of operation cannot be evaluated individually.
                      Furthermore, any AST can only deliver valid information
                      within its own standardized testing environment.[3]To
                      address this issue, our group is investigating isolated
                      parameters in-situ, i.e. in a PEM water electrolysis cell
                      setup,[4] as well as ex-situ, where the catalyst layer (CL)
                      electrodes of a MEA are applied in a conventional 3- or
                      4-electrode electrochemical setup. Ex-situ, the
                      electrochemical performance efficiency of a CL can be
                      investigated based on preceding treatment. In this context
                      cyclic voltammetry (CV), linear sweep voltammetry (LSV) and
                      electrochemical impedance spectroscopy (EIS) can provide
                      valuable information about the catalytic activity, kinetics
                      and electrochemically active surface area, and scanning
                      electrochemical microscopy (SECM)[5] – as an
                      electrochemical imaging technique – gives insight into the
                      homogeneity of the active surface.In our study, we present
                      the results of the effect of different conditioning
                      procedures on the electrochemical performance of commercial
                      MEAs. We investigated combinations of potential cycling,
                      chemical, potentiostatic and potentiodynamic conditioning
                      protocols at IrOx-based anodes. The ex-situ electrochemical
                      characterization on the conditioned anodes showed that the
                      potentiostatic MEA conditioning has a positive impact on the
                      anode impedance and current response. The focus will be on
                      local properties obtained from SECM experiments.Funding:
                      This work was financially supported by the Bundesministerium
                      für Bildung und Forschung (BMBF): Wasserstoff - Leitprojekt
                      H2Giga, Teilvorhaben DERIEL (project number 03HY122C),
                      SEGIWA (project number 03HY121B).[1] A. S. Aricò, S.
                      Siracusano, N. Briguglio, V. Baglio, A. Di Blasi, V.
                      Antonucci, J. Appl. Electrochem. 2013, 43, 107.[2] E.
                      Kuhnert, V. Hacker, M. Bodner, Int. J. Energy Res. 2023,
                      2023, 1.[3] P. Aßmann, A. S. Gago, P. Gazdzicki, K. A.
                      Friedrich, M. Wark, Curr. Opin. Electrochem. 2020, 21,
                      225.[4] N. Wolf, A. Javed, L. Treutlein, H. Kungl, A. Karl,
                      E. Jodat, R.-A. Eichel, Electrochem. Sci. Adv. 2025,
                      0:e202400038.[5] D. Polcari, P. Dauphin-Ducharme, J.
                      Mauzeroll, Chem. Rev. 2016, 116, 13234.},
      month         = {Jun},
      date          = {2025-06-04},
      organization  = {Ulm Electro Chemical Talks, Ulm
                       (Germany), 4 Jun 2025 - 5 Jun 2025},
      subtyp        = {After Call},
      cin          = {IET-1},
      cid          = {I:(DE-Juel1)IET-1-20110218},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/1048451},
}