% 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{Vennewald:1006568,
      author       = {Vennewald, Maurice and Sackers, Nina Michelle and Iemhoff,
                      Andree and Kappel, Isabella and Weidenthaler, Claudia and
                      Meise, Ansgar and Heggen, Marc and Dunin-Borkowski, Rafal
                      and Keenan, Luke and Palkovits, Regina},
      title        = {{D}ynamics of palladium single-atoms on graphitic carbon
                      nitride during ethylene hydrogenation},
      journal      = {Journal of catalysis},
      volume       = {421},
      issn         = {0021-9517},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2023-01716},
      pages        = {134 - 144},
      year         = {2023},
      abstract     = {Single-atoms on carbon–nitrogen supports are considered
                      catalysts for a multitude of reactions. However, doubts
                      remain whether really these species or subnanometer clusters
                      formed under reaction conditions are the active species. In
                      this work, we investigate the dynamics of palladium
                      single-atoms on graphitic carbon nitride during ethylene
                      hydrogenation and H2-D2 exchange. By employing
                      aberration-corrected scanning transmission electron
                      microscopy, x-ray photoelectron spectroscopy and x-ray
                      absorption spectroscopy, we will show that palladium,
                      originally present as single-atoms, agglomerates to clusters
                      at 100 °C in a gas atmosphere that contains both ethylene
                      and hydrogen. This agglomeration goes in hand with the
                      emergence of catalytic activity in both ethylene
                      hydrogenation and H2-D2 exchange, suggesting that clusters,
                      rather than single-atoms, are the active species. The
                      results presented herein highlight the potential of
                      analytics over the course of reaction to identify the active
                      species and provide new insights into the influence of gas
                      atmosphere on metal speciation.},
      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)},
      pid          = {G:(DE-HGF)POF4-5351},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000956023800001},
      doi          = {10.1016/j.jcat.2023.03.011},
      url          = {https://juser.fz-juelich.de/record/1006568},
}