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@ARTICLE{Rodenbcher:903016,
      author       = {Rodenbücher, Christian and Chen, Yingzhen and Wippermann,
                      Klaus and Kowalski, Piotr M. and Giesen, Margret and Mayer,
                      Dirk and Hausen, Florian and Korte, Carsten},
      title        = {{T}he {S}tructure of the {E}lectric {D}ouble {L}ayer of the
                      {P}rotic {I}onic {L}iquid [{D}ema][{T}f{O}] {A}nalyzed by
                      {A}tomic {F}orce {S}pectroscopy},
      journal      = {International journal of molecular sciences},
      volume       = {22},
      number       = {23},
      issn         = {1422-0067},
      address      = {Basel},
      publisher    = {Molecular Diversity Preservation International},
      reportid     = {FZJ-2021-04745},
      pages        = {12653 -},
      year         = {2021},
      abstract     = {Protic ionic liquids are promising electrolytes for fuel
                      cell applications. They would allow for an increase in
                      operation temperatures to more than 100 °C, facilitating
                      water and heat management and, thus, increasing overall
                      efficiency. As ionic liquids consist of bulky charged
                      molecules, the structure of the electric double layer
                      significantly differs from that of aqueous electrolytes. In
                      order to elucidate the nanoscale structure of the
                      electrolyte–electrode interface, we employ atomic force
                      spectroscopy, in conjunction with theoretical modeling using
                      molecular dynamics. Investigations of the low-acidic protic
                      ionic liquid diethylmethylammonium triflate, in contact with
                      a platinum (100) single crystal, reveal a layered structure
                      consisting of alternating anion and cation layers at the
                      interface, as already described for aprotic ionic liquids.
                      The structured double layer depends on the applied electrode
                      potential and extends several nanometers into the liquid,
                      whereby the stiffness decreases with increasing distance
                      from the interface. The presence of water distorts the
                      layering, which, in turn, significantly changes the
                      system’s electrochemical performance. Our results indicate
                      that for low-acidic ionic liquids, a careful adjustment of
                      the water content is needed in order to enhance the proton
                      transport to and from the catalytic electrode},
      cin          = {IEK-14 / IEK-13 / IBI-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-14-20191129 / I:(DE-Juel1)IEK-13-20190226 /
                      I:(DE-Juel1)IBI-3-20200312},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123) / 5241 -
                      Molecular Information Processing in Cellular Systems
                      (POF4-524)},
      pid          = {G:(DE-HGF)POF4-1231 / G:(DE-HGF)POF4-5241},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {34884462},
      UT           = {WOS:000735138100001},
      doi          = {10.3390/ijms222312653},
      url          = {https://juser.fz-juelich.de/record/903016},
}