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@ARTICLE{Hornberger:911340,
      author       = {Hornberger, Elisabeth and Klingenhof, Malte and Polani,
                      Shlomi and Paciok, Paul and Kormanyos, Attila and Chattot,
                      Raphaël and MacArthur, Katherine and Wang, Xingli and Pan,
                      Lujin and Drnec, Jakub and Cherevko, Serhiy and Heggen, Marc
                      and Dunin-Borkowski, Rafal E. and Strasser, Peter},
      title        = {{O}n the electrocatalytical oxygen reduction reaction
                      activity and stability of quaternary {R}h{M}o-doped
                      {P}t{N}i/{C} octahedral nanocrystals},
      journal      = {Chemical science},
      volume       = {13},
      number       = {32},
      issn         = {2041-6520},
      address      = {Cambridge},
      publisher    = {RSC},
      reportid     = {FZJ-2022-04632},
      pages        = {9295 - 9304},
      year         = {2022},
      abstract     = {Recently proposed bimetallic octahedral Pt–Ni
                      electrocatalysts for the oxygen reduction reaction (ORR) in
                      proton exchange membrane fuel cell (PEMFC) cathodes suffer
                      from particle instabilities in the form of Ni corrosion and
                      shape degradation. Advanced trimetallic Pt-based
                      electrocatalysts have contributed to their catalytic
                      performance and stability. In this work, we propose and
                      analyse a novel quaternary octahedral (oh-)Pt nanoalloy
                      concept with two distinct metals serving as stabilizing
                      surface dopants. An efficient solvothermal one-pot strategy
                      was developed for the preparation of shape-controlled
                      oh-PtNi catalysts doped with Rh and Mo in its surface. The
                      as-prepared quaternary octahedral PtNi(RhMo) catalysts
                      showed exceptionally high ORR performance accompanied by
                      improved activity and shape integrity after stability tests
                      compared to previously reported bi- and tri-metallic
                      systems. Synthesis, performance characteristics and
                      degradation behaviour are investigated targeting deeper
                      understanding for catalyst system improvement strategies. A
                      number of different operando and on-line analysis techniques
                      were employed to monitor the structural and elemental
                      evolution, including identical location scanning
                      transmission electron microscopy and energy dispersive X-ray
                      analysis (IL-STEM-EDX), operando wide angle X-ray
                      spectroscopy (WAXS), and on-line scanning flow cell
                      inductively coupled plasma mass spectrometry (SFC-ICP-MS).
                      Our studies show that doping PtNi octahedral catalysts with
                      small amounts of Rh and Mo suppresses detrimental Pt
                      diffusion and thus offers an attractive new family of shaped
                      Pt alloy catalysts for deployment in PEMFC cathode layers.},
      cin          = {ER-C-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {5351 - Platform for Correlative, In Situ and Operando
                      Characterization (POF4-535) / DFG project 257727131 -
                      Nanoskalige Pt Legierungselektrokatalysatoren mit
                      definierter Morphologie: Synthese, Electrochemische Analyse,
                      und ex-situ/in-situ Transmissionselektronenmikroskopische
                      (TEM) Studien (257727131)},
      pid          = {G:(DE-HGF)POF4-5351 / G:(GEPRIS)257727131},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {36093024},
      UT           = {WOS:000835598500001},
      doi          = {10.1039/D2SC01585D},
      url          = {https://juser.fz-juelich.de/record/911340},
}