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@ARTICLE{Heggen:837918,
      author       = {Heggen, Marc and Gocyla, Martin and Dunin-Borkowski, Rafal},
      title        = {{T}he growth and degradation of binary and ternary
                      octahedral {P}t–{N}i-based fuel cell catalyst
                      nanoparticles studied using advanced transmission electron
                      microscopy},
      journal      = {Advances in Physics: X},
      volume       = {2},
      number       = {2},
      issn         = {2374-6149},
      address      = {Abingdon},
      publisher    = {Taylor $\&$ Francis Group},
      reportid     = {FZJ-2017-06688},
      pages        = {281 - 301},
      year         = {2017},
      abstract     = {Advances in fuel cell technology depend strongly on the
                      development of affordable, active, and stable catalysts. For
                      example, octahedral Pt–Ni alloy nanoparticles show
                      exceptional activity for the oxygen reduction reaction in
                      fuel cell cathodes as a result of the presence of highly
                      active {1 1 1} facets. Here, we review a selection of
                      recent transmission electron microscopy studies that address
                      the correlation between the catalytic performance of
                      octahedral Pt–Ni-based nanoparticles and their
                      atomic-scale structure and composition. We begin by
                      describing strategies for the growth of binary Pt–Ni and
                      ternary Pt–Ni–TM (TM = transition metal) nanoparticles,
                      with a focus on understanding how their structure and
                      compositional anisotropy is related to their catalytic
                      activity and stability. We then describe the morphological
                      changes and compositional degradation effects that can occur
                      in electrochemical environments. Changes in nanoparticle
                      shape, including the loss of highly active {1 1 1}
                      facets due to dealloying from Ni-rich facets and Pt surface
                      diffusion, are discussed as important reasons for catalyst
                      degradation. Finally, strategies to prevent degradation,
                      e.g. by surface doping, are addressed. The growth,
                      segregation, and degradation mechanisms that we describe
                      highlight the complexity with which octahedral alloy
                      nanoparticles form and evolve under reaction conditions.},
      cin          = {ER-C-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000398911200003},
      doi          = {10.1080/23746149.2017.1282834},
      url          = {https://juser.fz-juelich.de/record/837918},
}