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@ARTICLE{Tseng:414788,
      author       = {Tseng, Jo-Chi and Gu, Dong and Pistidda, Claudio and
                      Horstmann, Christian and Dornheim, Martin and Ternieden, Jan
                      and Weidenthaler, Claudia},
      title        = {{T}racking the {A}ctive {C}atalyst for {I}ron-{B}ased
                      {A}mmonia {D}ecomposition by {I}n {S}itu {S}ynchrotron
                      {D}iffraction {S}tudies},
      journal      = {ChemCatChem},
      volume       = {10},
      number       = {19},
      issn         = {1867-3880},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {PUBDB-2018-04216},
      pages        = {4465 - 4472},
      year         = {2018},
      abstract     = {Iron‐based catalysts for NH$_3$ decomposition have been
                      studied by a combination of catalytic tests and in situ
                      synchrotron diffraction experiments performed in an inert
                      sapphire plug‐flow cell. In contrast to steel‐based
                      reaction cells, sapphire or quartz glass cells show no blind
                      activity. Starting from iron oxide precursors, iron nitrides
                      form during the activation cycle. Nitrides remain as main
                      crystalline phases and govern the conversion of NH$_3$
                      decomposition in the subsequent cycles. In this work
                      structural and compositional changes of the nitrides were
                      monitored in situ during heating and cooling cycles. The
                      state of the catalyst under reaction conditions was analyzed
                      by high resolution in situ synchrotron diffraction
                      experiments. The analyses enable establishing reaction
                      pathways and correlation of structural features with
                      catalytic conversions. The most active phases are iron
                      nitrides with high mobility and solubility for nitrogen
                      atoms, such as Fe$_3$N$_x$. Phase changes from Fe$_3$N$_x$
                      to $γ$‐FeN$_x$ were observed above 700 °C. The
                      formation of $γ$‐FeN$_x$ seems to suppress the catalytic
                      conversion. Moreover, the positive influence of a
                      mesostructured support/catalyst composite on the catalytic
                      conversion and catalyst stability were studied in detail.},
      cin          = {DOOR ; HAS-User / MPG},
      ddc          = {540},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)MPG-20120806},
      pnm          = {6G3 - PETRA III (POF3-622)},
      pid          = {G:(DE-HGF)POF3-6G3},
      experiment   = {EXP:(DE-H253)P-P02.1-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000446980600036},
      doi          = {10.1002/cctc.201800398},
      url          = {https://bib-pubdb1.desy.de/record/414788},
}