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@INPROCEEDINGS{Stamatelos:1037734,
      author       = {Stamatelos, Ilias and Dinh, Cao Thang and Lehnert, Werner
                      and Pasel, Joachim and Shviro, Meital},
      title        = {{Z}n-{B}ased {C}atalysts for {S}elective and {S}table
                      {E}lectrochemical {CO} 2 {R}eduction at {H}igh {C}urrent
                      {D}ensities},
      issn         = {2151-2043},
      reportid     = {FZJ-2025-00894},
      year         = {2023},
      abstract     = {The development of low-cost and stable catalysts is
                      important for lowering the capital and operational cost of
                      CO2 electro-reduction (ECR). Zinc (Zn) is an earth-abundant
                      metal, with promising performance for the CO2-to-CO
                      conversion.1 Zinc oxide (ZnO) has been recently employed for
                      the CO2-to-CO conversion, recording promising selectivity
                      (FECO) but short-term stability, in Flow-Cell
                      configuration.2,3 ZnO phase has been proven critical for
                      competent ECR performance, since both the oxidation state of
                      Zn and the Zn/ZnO interface are proven critical for high
                      FECO. 4,5In our work 6, we have synthesised various ZnO
                      allotropes, the properties of which induced differences in
                      their ECR performance. We have identified the ZnO nanorods
                      (ZnO-NR) as the best performing catalyst. The latter was
                      implemented in a zero-gap ECR electrolyser (MEA), recording
                      partial current density for CO (jCO) of 160 mA cm-2 at cell
                      voltage of 3.6 V. We have correlated the depletion of the
                      ZnO phase in the MEA with the degradation of the performance
                      (initially 15 h stability). We applied a periodic oxidation
                      protocol in the MEA, causing the regeneration of ZnO-phase,
                      allowing us to prolong the life-time of the catalyst.
                      Through our strategy we were able to record $82\%$ CO
                      selectivity (FECO) for over 100 h, at -160 mA cm-2. This
                      work provides an approach of practical use of inexpensive
                      Zn-based catalysts for large-scale ECR applications.},
      month         = {Oct},
      date          = {2023-10-08},
      organization  = {244th ECS Meeting, Gothenburg
                       (Sweden), 8 Oct 2023 - 12 Oct 2023},
      cin          = {IEK-14 / IET-4},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-14-20191129 / I:(DE-Juel1)IET-4-20191129},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)1},
      doi          = {10.1149/MA2023-02582802mtgabs},
      url          = {https://juser.fz-juelich.de/record/1037734},
}