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@ARTICLE{Rodenbcher:872693,
author = {Rodenbücher, Christian and Szot, Kristof and Wrana,
Dominik and Jany, Benedykt R. and Krok, Franciszek and
Korte, Carsten},
title = {{L}ocalized electrochemical redox reactions in yttria
stabilized zirconia single crystals},
journal = {JPhys energy},
volume = {2},
issn = {2515-7655},
address = {Bristol},
publisher = {IOP Publishing},
reportid = {FZJ-2020-00183},
pages = {034008},
year = {2020},
abstract = {Herein, electroreduction in yttria-stabilized zirconia are
investigated by means of Hebb-Wagner polarization
experiments. By performing optical and thermal microscopy on
single crystals and thin films during the application of an
electric field under vacuum or oxygen-tight sealed
conditions, the movement of the reduction front from the
cathode to the anode, which causes a blackening of the
material, is monitored. When performing electrocoloration
experiments on thin film samples, the progressing reaction
of the blackened region was found to be inhomogeneous and
evolves as a dendrite-like finger structure. The progression
of the blackening fingers follow preferentially the electric
field lines and thus are influenced by distortions in the
field that can be caused by metallic particles embedded in
the oxide. In contrast to this, in the first stage of the
reduction process no significant influence of
mechanically-induced dislocations on the morphology or
kinetics on the electroreduction can be found. Only after a
heavy electroreduction was a localized transformation of the
surface region observed. There is an evolution of highly
oxygen deficient ZrOx regions, which have a characteristic
checked topography pattern at the microscale level.},
cin = {IEK-14},
ddc = {530},
cid = {I:(DE-Juel1)IEK-14-20191129},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000569619500001},
doi = {10.1088/2515-7655/ab6b39},
url = {https://juser.fz-juelich.de/record/872693},
}