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@ARTICLE{Seeger:140888,
      author       = {Seeger, J. and Ivanova, Mariya and Meulenberg, W. A. and
                      Sebold, D. and Stöver, D. and Scherb, T. and Schumacher, G.
                      and Escolástico, S. and Solís, C. and Serra, J. M.},
      title        = {{S}ynthesis and {C}haracterization of {N}onsubstituted and
                      {S}ubstituted {P}roton-{C}onducting {L}a6−x{WO}12−y},
      journal      = {Inorganic chemistry},
      volume       = {52},
      number       = {18},
      issn         = {0020-1669},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2013-06125},
      pages        = {10375−10386},
      year         = {2013},
      abstract     = {Mixed proton−electron conductors (MPEC) can be used as
                      gas separation membranes to extract hydrogen from a gas
                      stream, for example, in a power plant. From the different
                      MPEC, the ceramic material lanthanum tungstate presents an
                      important mixed protonic−electronic conductivity.
                      Lanthanum tungstate La6−xWO12−y (with y = 1.5x + δ and
                      x =0.5−0.8) compounds were prepared with La/W ratios
                      between 4.8 and 6.0 and sintered at temperatures between
                      1300 and 1500 °C in order to study the dependence of the
                      single-phase formation region on the La/W ratio and
                      temperature. Furthermore, compounds substituted in the La or
                      W position were prepared. Ce, Nd, Tb, and Y were used for
                      partial substitution at the La site, while Ir, Re, and Mo
                      were applied for W substitution. All substituents were
                      applied in different concentrations. The electrical
                      conductivity of nonsubstituted La6−xWO12−y and for all
                      substituted La6−xWO12−y compounds was measured in the
                      temperature range of 400−900 °C in wet $(2.5\%$ H2O) and
                      dry mixtures of $4\%$ H2 in Ar. The greatest improvement in
                      the electrical characteristics was found in the case of 20
                      mol $\%$ substitution with both Re and Mo. After treatment
                      in $100\%$ H2 at 800 °C, the compounds remained unchanged
                      as confirmed with XRD, Raman, and SEM.},
      cin          = {IEK-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {122 - Power Plants (POF2-122) / SOFC - Solid Oxide Fuel
                      Cell (SOFC-20140602)},
      pid          = {G:(DE-HGF)POF2-122 / G:(DE-Juel1)SOFC-20140602},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000330098300023},
      pubmed       = {pmid:24000891},
      doi          = {10.1021/ic401104m},
      url          = {https://juser.fz-juelich.de/record/140888},
}