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@ARTICLE{Weinrich:906938,
      author       = {Weinrich, Henning and Pleie, Jan and Schmid, Bernhard and
                      Tempel, Hermann and Kungl, Hans and Eichel, Rüdiger-A.},
      title        = {{I}n {S}itu {H}ydrogen {E}volution {M}onitoring {D}uring
                      the {E}lectrochemical {F}ormation and {C}ycling of
                      {P}ressed‐{P}late {C}arbonyl {I}ron {E}lectrodes in
                      {A}lkaline {E}lectrolyte},
      journal      = {Batteries $\&$ Supercaps},
      volume       = {5},
      issn         = {2566-6223},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2022-01763},
      pages        = {e202100415},
      year         = {2022},
      abstract     = {The hydrogen evolution reaction (HER) on iron is a
                      parasitic side reaction for the reduction of iron
                      (hydr)oxide in alkaline electrolyte, which lowers the
                      Coulombic efficiency of iron-based batteries. Tackling this
                      issue, here we investigate the HER on iron electrodes by
                      in situ gas chromatography, allowing for a quantitative
                      correlation of the applied electrode potential and the
                      resulting hydrogen evolution. As a result, it is shown that
                      the HER follows a distinctive profile corresponding to the
                      electrode potential and changes depending on the state of
                      the iron electrode formation. Moreover, it is shown that the
                      charging efficiency of the iron electrode can be increased
                      by an alteration of the charging procedure, i. e., a more
                      negative cut-off potential for the discharge and a potential
                      limitation for the recharge. In this study, a charging
                      efficiency of $96.7 \%$ is achieved, using an optimized
                      charging procedure for a formed carbonyl iron electrode
                      containing $8.5 wt.\%$ of Bi2S3.},
      cin          = {IEK-9},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1223 - Batteries in Application (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1223},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000761131000001},
      doi          = {10.1002/batt.202100415},
      url          = {https://juser.fz-juelich.de/record/906938},
}