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@ARTICLE{ArnAis:279852,
      author       = {Arán-Ais, Rosa M. and Dionigi, Fabio and Merzdorf, Thomas
                      and Gocyla, Martin and Heggen, Marc and Dunin-Borkowski,
                      Rafal and Gliech, Manuel and Solla-Gullón, José and
                      Herrero, Enrique and Feliu, Juan M. and Strasser, Peter},
      title        = {{E}lemental {A}nisotropic {G}rowth and {A}tomic-{S}cale
                      {S}tructure of {S}hape-{C}ontrolled {O}ctahedral
                      {P}t–{N}i–{C}o {A}lloy {N}anocatalysts},
      journal      = {Nano letters},
      volume       = {15},
      number       = {11},
      issn         = {1530-6992},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2015-07730},
      pages        = {7473 - 7480},
      year         = {2015},
      abstract     = {Multimetallic shape-controlled nanoparticles offer great
                      opportunities to tune the activity, selectivity, and
                      stability of electrocatalytic surface reactions. However, in
                      many cases, our synthetic control over particle size,
                      composition, and shape is limited requiring trial and error.
                      Deeper atomic-scale insight in the particle formation
                      process would enable more rational syntheses. Here we
                      exemplify this using a family of trimetallic PtNiCo
                      nanooctahedra obtained via a low-temperature,
                      surfactant-free solvothermal synthesis. We analyze the
                      competition between Ni and Co precursors under coreduction
                      “one-step” conditions when the Ni reduction rates
                      prevailed. To tune the Co reduction rate and final content,
                      we develop a “two-step” route and track the evolution of
                      the composition and morphology of the particles at the
                      atomic scale. To achieve this, scanning transmission
                      electron microscopy and energy dispersive X-ray elemental
                      mapping techniques are used. We provide evidence of a
                      heterogeneous element distribution caused by
                      element-specific anisotropic growth and create octahedral
                      nanoparticles with tailored atomic composition like Pt1.5M,
                      PtM, and PtM1.5 (M = Ni + Co). These trimetallic
                      electrocatalysts have been tested toward the oxygen
                      reduction reaction (ORR), showing a greatly enhanced mass
                      activity related to commercial Pt/C and less activity loss
                      than binary PtNi and PtCo after 4000 potential cycles.},
      cin          = {PGI-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000364725400045},
      doi          = {10.1021/acs.nanolett.5b03057},
      url          = {https://juser.fz-juelich.de/record/279852},
}