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@ARTICLE{Reshetenko:917180,
      author       = {Reshetenko, Tatyana and Kulikovsky, Andrei},
      title        = {{O}xygen transport in the low–{P}t catalyst layer of a
                      {PEM} fuel cell: {I}mpedance spectroscopy study},
      journal      = {Materials Research Express},
      volume       = {10},
      number       = {1},
      issn         = {2053-1591},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2023-00412},
      pages        = {015501 -},
      year         = {2023},
      abstract     = {A model for PEM fuel cell impedance taking into account the
                      pore size distribution (PSD) in the cathode catalyst layer
                      is developed. Experimental PSD is approximated by pores of
                      three sizes (small, medium and large) and in each kind of
                      pores, the oxygen diffusion coefficient is allowed to have a
                      separate value. The model is fitted to experimental
                      impedance spectra of a low–Pt PEM fuel cell. The oxygen
                      diffusivities of small and medium pores exhibit rapid growth
                      with the cell current density, while in large pores, this
                      parameter remains nearly constant. We show that oxygen
                      reduction occurs mainly in the small and medium pores,
                      leaving the large pores for mass transport only. This effect
                      explains the discrepancy between small effective oxygen
                      diffusivity of PEMFC catalyst layer measured in situ in
                      operating cells by limiting current method, and much larger
                      value of this parameter determined from ex situ experiments
                      using Loschmidt cell.},
      cin          = {IEK-13},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-13-20190226},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000909418700001},
      doi          = {10.1088/2053-1591/acaef3},
      url          = {https://juser.fz-juelich.de/record/917180},
}