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@ARTICLE{Arcon:275821,
      author       = {Arcon, Iztok and Paganelli, Stefano and Piccolo, Oreste and
                      Gallo, Michele and Vogel-Mikuš, Katarina and Baldi, Franco},
      title        = {{XAS} analysis of iron and palladium bonded to a
                      polysaccharide produced anaerobically by a strain of
                      {K}lebsiella oxytoca},
      journal      = {Journal of synchrotron radiation},
      volume       = {22},
      number       = {5},
      issn         = {1600-5775},
      address      = {Chester},
      publisher    = {IUCr},
      reportid     = {PUBDB-2015-04252},
      pages        = {1215 - 1226},
      year         = {2015},
      abstract     = {Klebsiella oxytoca BAS-10 ferments citrate to acetic acid
                      and CO2, and secretesa specific exopolysaccharide (EPS),
                      which is able to bind different metallicspecies. These
                      biomaterials may be used for different biotechnological
                      purposes,including applications as innovative green
                      biogenerated catalysts. In productionof biogenerated Pd
                      species, the Fe(III) as ferric citrate is added to
                      anaerobicculture of K. oxytoca BAS-10, in the presence of
                      palladium species, to increasethe EPS secretion and improve
                      Pd-EPS yield. In this process, bi-metallic (FePd-EPS)
                      biomaterials were produced for the first time. The
                      morphology of bimetallicEPS, and the chemical state of the
                      two metals in the FePd-EPS, areinvestigated by transmission
                      electron microscopy, Fourier transform
                      infra-redspectroscopy, micro-X-ray fluorescence, and X-ray
                      absorption spectroscopymethods (XANES and EXAFS), and
                      compared with mono-metallic Pd-EPS andFe-EPS complexes. Iron
                      in FePd-EPS is in the mineralized form of iron
                      oxides/hydroxides, predominantly in the form of Fe3+, with a
                      small amount of Fe2+ inthe structure, most probably a
                      mixture of different nano-crystalline iron oxidesand
                      hydroxides, as in mono-metallic Fe-EPS. Palladium is found
                      as Pd(0) in theform of metallic nanoparticles with
                      face-centred cubic structure in both bimetallic(FePd-EPS)
                      and mono-metallic (Pd-EPS) species. In bi-metallic
                      species,Pd and Fe nanoparticles agglomerate in larger
                      clusters, but they remain spatiallyseparated. The catalytic
                      ability of bi-metallic species (FePd-EPS) in a
                      hydrodechlorinationreaction is improved in comparison with
                      mono-metallic Pd-EPS.},
      cin          = {DOOR},
      ddc          = {540},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {899 - ohne Topic (POF3-899) / FS-Proposal: I-20110511 EC
                      (I-20110511-EC) / CALIPSO - Coordinated Access to
                      Lightsources to Promote Standards and Optimization (312284)},
      pid          = {G:(DE-HGF)POF3-899 / G:(DE-H253)I-20110511-EC /
                      G:(EU-Grant)312284},
      experiment   = {EXP:(DE-H253)D-C-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000360142400011},
      pubmed       = {pmid:26289273},
      doi          = {10.1107/S1600577515010371},
      url          = {https://bib-pubdb1.desy.de/record/275821},
}