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@ARTICLE{Feng:911336,
      author       = {Feng, Quanchen and Wang, Xingli and Klingenhof, Malte and
                      Heggen, Marc and Strasser, Peter},
      title        = {{L}ow‐{P}t {N}i{NC}‐{S}upported {P}t{N}i {N}anoalloy
                      {O}xygen {R}eduction {R}eaction {E}lectrocatalysts—{I}n
                      {S}itu {T}racking of the {A}tomic {A}lloying {P}rocess},
      journal      = {Angewandte Chemie / International edition},
      volume       = {61},
      number       = {36},
      issn         = {0570-0833},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2022-04628},
      pages        = {e202203728},
      year         = {2022},
      abstract     = {We report and analyze a synthetic strategy toward low-Pt
                      platinum-nickel (Pt-Ni) alloy nanoparticle (NP) cathode
                      catalysts for the catalytic electroreduction of molecular
                      oxygen to water. The synthesis involves the pyrolysis and
                      leaching of Ni-organic polymers, subsequent Pt NP
                      deposition, followed by thermal alloying, resulting in
                      single Ni atom site (NiNC)-supported PtNi alloy NPs at low
                      Pt weight loadings of only $3–5 wt \%.$ Despite low Pt
                      weight loading, the catalysts exhibit more favorable Pt-mass
                      activities compared to conventional $20–30 wt \%$
                      benchmark PtNi catalysts. Using in situ microscopic
                      techniques, we track and unravel the key stages of the PtNi
                      alloy formation process directly at the atomic scale.
                      Surprisingly, we find that carbon-encapsulated metallic Ni@C
                      structures, rather than NiNx sites, act as the Ni source
                      during alloy formation. Our materials concepts offer a
                      pathway to further decrease the overall Pt content in
                      hydrogen fuel cell cathodes.},
      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       = {35802306},
      UT           = {WOS:000830727500001},
      doi          = {10.1002/anie.202203728},
      url          = {https://juser.fz-juelich.de/record/911336},
}