% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Dwivedi:620065,
      author       = {Dwivedi, Jagrati and Bachmann, Lydia J. and Jeromin, Arno
                      and Kulkarni, Satishkumar and Noei, Heshmat and Tănase,
                      Liviu C. and Tiwari, Aarti and de Souza Caldas, Lucas and
                      Schmidt, Thomas and Cuenya, Beatriz Roldan and Stierle,
                      Andreas and Keller, Thomas F.},
      title        = {{S}pectro-{M}icroscopy of {I}ndividual {P}t–{R}h
                      {C}ore–{S}hell {N}anoparticles during {C}ompeting
                      {O}xidation and {A}lloying},
      journal      = {ACS nano},
      volume       = {19},
      number       = {31},
      issn         = {1936-0851},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PUBDB-2025-00003},
      pages        = {28516 - 28529},
      year         = {2025},
      abstract     = {The surface chemical composition of supported single Pt-Rh
                      core-shell nanoparticles was studied to understand the Rh
                      behavior in oxidizing and reducing gas environments using
                      spectro-microscopy with high spatial resolution. We combined
                      in situ X-ray photoemission electron microscopy with ex situ
                      scanning electron-, atomic force- and scanning
                      Auger-microscopy to distinguish Rh oxidation-reduction,
                      dewetting-sintering and alloying-segregation during the
                      course of the experiment. A more than $20\%$ higher Rh
                      3d$_{5/2}$ oxide to metal photoemission intensity ratio for
                      the Rh layer on top of the Pt-core was found as compared to
                      the bare strontium titanate (STO) oxide catalyst support in
                      close vicinity, where Rh/RhO$_x$ nanoparticles are forming.
                      At elevated temperatures, Rh diffuses into the Pt particle,
                      and this alloying at the Pt metal surface competes with the
                      Rh oxidation, whereas the Rh/RhO$_x$ nanoparticles on the
                      STO support are observed to sinter under identical oxidizing
                      and temperature environments. A nanoparticle facet dependent
                      analysis of selected Pt-core nanoparticles suggests that Rh
                      oxidation is most advanced on a small nanoparticle with a
                      low coordination top facet that we indexed by electron back
                      scatter diffraction, demonstrating the strength of our
                      correlative approach.},
      cin          = {FS-NL},
      ddc          = {540},
      cid          = {I:(DE-H253)FS-NL-20120731},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / NEP - Nanoscience Foundries and Fine
                      Analysis - Europe|PILOT (101007417) / DFG project
                      G:(GEPRIS)390540038 - EXC 2008: Unifying Systems in
                      Catalysis "UniSysCat" (390540038)},
      pid          = {G:(DE-HGF)POF4-632 / G:(EU-Grant)101007417 /
                      G:(GEPRIS)390540038},
      experiment   = {EXP:(DE-H253)Nanolab-04-20150101 /
                      EXP:(DE-H253)Nanolab-01-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:40736140},
      doi          = {10.1021/acsnano.5c07668},
      url          = {https://bib-pubdb1.desy.de/record/620065},
}