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@ARTICLE{Ranninger:893165,
      author       = {Ranninger, Johanna and Mayrhofer, Karl J. J. and Berkes,
                      Balázs B.},
      title        = {{T}he {C}rucial {R}ole of {W}ater in the {S}tability and
                      {E}lectrocatalytic {A}ctivity of {P}t {E}lectrodes},
      journal      = {The journal of physical chemistry / C},
      volume       = {125},
      number       = {24},
      issn         = {1932-7455},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2021-02603},
      pages        = {13254–13263},
      year         = {2021},
      abstract     = {Understanding the role of water in the activity and
                      stability of electrocatalysts is of great interest for
                      different fundamental reactions. Investigations aiming to
                      expand understanding of this are very challenging in aqueous
                      electrolytes. By contrast, nonaqueous electrolytes with very
                      well-defined water content can provide ideal conditions to
                      better clarify the role of water in electrochemical
                      reactions. In this paper, the dissolution and
                      electrochemical behavior of Pt during potentiodynamic and
                      potentiostatic measurements in methanol- and
                      acetonitrile-based electrolytes with accurately controlled
                      water content of <1 ppm, 100 ppm, 1000 ppm, $1\%,$ and
                      $10\%$ are studied. In methanol-based electrolytes, we
                      demonstrate the promoting effect of small amounts of water
                      on the methanol oxidation reaction. We show the formation of
                      surface oxide species with increasing water content in the
                      Pt dissolution profile, which develops from a purely anodic
                      to a predominantly cathodic dissolution, a known
                      characteristic of aqueous electrolytes. The effect of water
                      on the electrode stability is fundamentally different in
                      acetonitrile-based systems: presumably, the strong
                      adsorption of solvent molecules competes with the adsorption
                      of water and thus inhibits the formation of an oxide layer
                      at the surface even up to a water concentration of $1\%$ as
                      revealed by potentiodynamic measurements.},
      cin          = {IEK-11},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-11-20140314},
      pnm          = {123 - Chemische Energieträger (POF4-123)},
      pid          = {G:(DE-HGF)POF4-123},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000668350500017},
      doi          = {10.1021/acs.jpcc.1c02124},
      url          = {https://juser.fz-juelich.de/record/893165},
}