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@ARTICLE{Balaguer:908321,
author = {Balaguer, Maria and Sohn, Yoo Jung and Kobertz, Dietmar and
Kasatikov, Sergey and Fantin, Andrea and Müller, Michael
and Menzler, Norbert H. and Guillon, Olivier and Ivanova,
Mariya},
title = {{C}haracterization of {Y} and {M}n co-substituted
{B}a{Z}r{O}3 ceramics: {M}aterial properties as a function
of the substituent concentration},
journal = {Solid state ionics},
volume = {382},
issn = {0167-2738},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2022-02540},
pages = {115959 -},
year = {2022},
abstract = {Innovations in materials science are the key element for
solving technological challenges. Various energy and
environmental applications require designing materials with
tailored compositions, microstructures and specific
target-oriented performance. Y and Mn co-substituted BaZrO3,
e.g. BaZr0.85Y0.15Mn0.05O3-δ, has previously attracted
attention as a membrane material for H2 separation from gas
mixtures due to its mixed proton-electron conductivity
leading to appreciable levels of H2-flux at elevated
temperatures and its good thermo-chemical stability under
reducing environments. In the present work, we developed
ceramic materials within the BaZr0.8Y0.2-xMnxO3-δ series,
where x = 0.02–0.15. The study of their functional
properties in dependence of the Y-to-Mn ratio disclosed that
thermal expansion and hydration decrease by increasing the
Mn content as well as the total electrical conductivity. In
addition to that, XPS analysis and near edge X-ray
absorption fine structure spectra (NEXAFS) in the vicinity
of O K-edge and Mn L2,3-edges indicated that the Mn atoms
oxidation state in the surface and in the bulk range from
Mn2+ to Mn4+ depending on the ambient conditions that can be
encountered in MPEC electrodes, which it is suggested to be
related with a hydration mechanism mediated by Mn oxidation
and subsequent proton attachment to oxygen neighbors,
similar to LSM.},
cin = {IEK-1},
ddc = {530},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {1231 - Electrochemistry for Hydrogen (POF4-123) / SOFC -
Solid Oxide Fuel Cell (SOFC-20140602)},
pid = {G:(DE-HGF)POF4-1231 / G:(DE-Juel1)SOFC-20140602},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000822940600002},
doi = {10.1016/j.ssi.2022.115959},
url = {https://juser.fz-juelich.de/record/908321},
}