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@ARTICLE{Engstfeld:640708,
      author       = {Engstfeld, Albert K. and Forschner, Lukas and Löw, Mario
                      and Pithan, Linus and Beyer, Paul and Jusys, Zenonas and
                      Bansmann, Joachim and Behm, Rolf Juergen and Drnec, Jakub},
      title        = {{S}tabilization of {R}u‐{C}ore {P}t‐{S}hell {M}odel
                      {E}lectrodes by {E}lectronic {E}ffects and
                      {E}lectrooxidation {R}eactions},
      journal      = {ChemCatChem},
      volume       = {17},
      number       = {9},
      issn         = {1867-3880},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {PUBDB-2025-04847},
      pages        = {e202401913},
      year         = {2025},
      abstract     = {The technical application of bimetallic core-shell
                      particles, which are highly attractive because of their high
                      electrocatalytic activity, depends crucially on their
                      long-term stability under operating conditions. In the
                      present multi-method study, we explored the stability of
                      structurally well-defined Ru-core Pt-shell model systems
                      during the CO oxidation (COOR) and methanol oxidation (MOR)
                      reactions. These electrodes consist of a single-crystalline
                      Ru(0001) substrate covered by epitaxial Pt films of one to
                      three atomic layers. The reaction-induced modifications in
                      the surface morphology were identified by scanning tunneling
                      microscopy (STM) measurements performed before and after the
                      electrocatalytic measurement, which reveal a higher
                      stability for electrodes with around three layers of Pt (up
                      to 1.4 V vs. the reversible hydrogen electrode) than for
                      those with fewer layers. Differential electrochemical mass
                      spectrometry (DEMS) measurements carried out during the COOR
                      allow separation of the COOR currents from surface redox
                      processes, providing insight into the role of surface
                      oxidation / reduction processes during the COOR. Operando
                      surface X-ray diffraction (SXRD) measurements performed
                      during electro-oxidation of methanol confirm the much higher
                      stability of the electrodes with three Pt layers. The main
                      conclusion of this work is that during the electro-oxidation
                      of organic molecules, the stability of the electrodes is, in
                      general, improved due to the reactive removal of OH/O
                      species from the surface.},
      cin          = {FS-EC},
      ddc          = {540},
      cid          = {I:(DE-H253)FS-EC-20120731},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1002/cctc.202401913},
      url          = {https://bib-pubdb1.desy.de/record/640708},
}