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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},
}