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@ARTICLE{Wippermann:872763,
      author       = {Wippermann, Klaus and Suo, Yanpeng and Korte, Carsten},
      title        = {{S}uitability of the anging meniscus {RDE} for the
                      electrochemical investigation of ionic liquids},
      journal      = {Journal of the Electrochemical Society},
      volume       = {167},
      number       = {4},
      issn         = {0013-4651},
      address      = {Pennington, NJ},
      publisher    = {Electrochemical Soc.},
      reportid     = {FZJ-2020-00241},
      pages        = {046511},
      year         = {2020},
      abstract     = {Employing the oxygen reduction reaction (ORR) exemplarily,
                      the suitability of the hanging meniscus RDE (HMRDE)
                      technique for viscous electrolytes—in particular for ionic
                      liquids—was examined. RDE and HMRDE experiments were
                      carried out using polycrystalline Pt disks in contact with
                      either concentrated phosphoric acid,
                      N,N-diethylmethylammoniumtriflate ([Dema][TfO]) or
                      2-sulfoethylmethyl-ammoniumtriflate ([2-Sema][TfO]). RDE
                      measurements revealed Levich factors of the oxygen transport
                      close to the theoretical value, even if the thickness of the
                      hydrodynamic layer was about ⅔ of the disk diameter. HMRDE
                      experiments showed a pronounced scattering of the Levich
                      factors, which means a significant error in the
                      determination of the mass transport parameters. In contrast,
                      reliable Tafel factors of ORR were obtained from HMRDE
                      experiments with viscous mixtures of [2-Sema][TfO] and
                      water. The thickness of the perturbed layer δ pl near the
                      edge of the HMRDE was found to be virtually independent of
                      the viscosity of the respective electrolyte. In the case of
                      viscous electrolytes like ionic liquids, the HMRDE technique
                      is particularly suitable for investigating the kinetic
                      parameters of electrochemical processes at elevated
                      temperatures >100 °C, whereas a more precise determination
                      of mass transport properties will only be possible once the
                      experimental error can be significantly reduced.},
      cin          = {IEK-14},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-14-20191129},
      pnm          = {135 - Fuel Cells (POF3-135)},
      pid          = {G:(DE-HGF)POF3-135},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000518538300002},
      doi          = {10.1149/1945-7111/ab75f9},
      url          = {https://juser.fz-juelich.de/record/872763},
}