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@ARTICLE{ArnAis:825374,
      author       = {Arán-Ais, Rosa M. and Solla-Gullón, José and Gocyla,
                      Martin and Heggen, Marc and Dunin-Borkowski, Rafal and
                      Strasser, Peter and Herrero, Enrique and Feliu, Juan M.},
      title        = {{T}he effect of interfacial p{H} on the surface atomic
                      elemental distribution and on the catalytic reactivity of
                      shape-selected bimetallic nanoparticles towards oxygen
                      reduction},
      journal      = {Nano energy},
      volume       = {27},
      issn         = {2211-2855},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2016-07837},
      pages        = {390 - 401},
      year         = {2016},
      abstract     = {The effect of interfacial pH during the surface cleaning of
                      shape-selected PtNi nanoparticles was investigated.
                      High-angle annular dark field (HAADF) scanning transmission
                      electron microscopy (STEM) and energy-dispersive X-ray (EDX)
                      elemental mapping techniques were used to analyze the
                      morphology and composition of the particles at the
                      nanoscale. The particles show similar atomic compositions
                      for both treated samples but different elemental
                      distribution on the surface of the nanooctahedra. X-ray
                      photoelectron spectroscopy (XPS) analysis confirmed
                      different surface compositions and the presence of different
                      oxidation states species at the outer part of the
                      nanoparticles. In addition, we compare characteristic
                      voltammetric profiles of these nanocatalysts when immersed
                      in three different aqueous supporting electrolytes (H2SO4,
                      HClO4 and NaOH). The behavior of the bimetallic
                      nanoparticles towards adsorbed CO oxidation has been
                      analyzed and compared with that observed after surface
                      disordering of the same catalysts. The electrocatalytic
                      activity of these nanoparticles has been also tested for the
                      electroreduction of oxygen showing high specific and mass
                      activity and better catalytic performance than pure Pt
                      shaped nanoparticles. The different treatments applied to
                      the surface of the nanocatalysts have led to remarkably
                      different catalytic responses, pointing out the outstanding
                      importance of the control of the surface of the alloyed
                      shape-selected nanoparticles after their synthesis and
                      before their use as electrocatalysts.},
      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:000384910500043},
      doi          = {10.1016/j.nanoen.2016.07.024},
      url          = {https://juser.fz-juelich.de/record/825374},
}