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@ARTICLE{Doppler:851498,
      author       = {Doppler, M. C. and Fleig, J. and Bram, M. and Opitz, A. K.},
      title        = {{H}ydrogen oxidation mechanisms on {N}i/yttria stabilized
                      zirconia anodes: {S}eparation of reaction pathways by
                      geometry variation of pattern electrodes},
      journal      = {Journal of power sources},
      volume       = {380},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2018-05124},
      pages        = {46 - 54},
      year         = {2018},
      abstract     = {Nickel/yttria stabilized zirconia (YSZ) electrodes are
                      affecting the overall performance of solid oxide fuel cells
                      (SOFCs) in general and strongly contribute to the cell
                      resistance in case of novel metal supported SOFCs in
                      particular. The electrochemical fuel conversion mechanisms
                      in these electrodes are, however, still only partly
                      understood. In this study, micro-structured Ni thin film
                      electrodes on YSZ with 15 different geometries are utilized
                      to investigate reaction pathways for the hydrogen
                      electro-oxidation at Ni/YSZ anodes. From electrodes with
                      constant area but varying triple phase boundary (TPB) length
                      a contribution to the electro-catalytic activity is found
                      that does not depend on the TPB length. This additional
                      activity could clearly be attributed to a yet unknown
                      reaction pathway scaling with the electrode area. It is
                      shown that this area related pathway has significantly
                      different electrochemical behavior compared to the TPB
                      pathway regarding its thermal activation, sulfur poisoning
                      behavior, and H2/H2O partial pressure dependence. Moreover,
                      possible reaction mechanisms of this reaction pathway are
                      discussed, identifying either a pathway based on hydrogen
                      diffusion through Ni with water release at the TPB or a path
                      with oxygen diffusion through Ni to be a very likely
                      explanation for the experimental results.},
      cin          = {IEK-1},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {135 - Fuel Cells (POF3-135) / SOFC - Solid Oxide Fuel Cell
                      (SOFC-20140602)},
      pid          = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000440265800011},
      doi          = {10.1016/j.jpowsour.2018.01.073},
      url          = {https://juser.fz-juelich.de/record/851498},
}