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@ARTICLE{Vibhu:908849,
author = {Vibhu, Vaibhav and Vinke, Izaak C. and Zaravelis, Fotios
and Neophytides, Stylianos G. and Niakolas, Dimitrios K. and
Eichel, Rüdiger-A. and de Haart, L. G. J.},
title = {{P}erformance and {D}egradation of
{E}lectrolyte-{S}upported {S}ingle {C}ell {C}omposed of
{M}o-{A}u-{N}i/{GDC} {F}uel {E}lectrode and {LSCF} {O}xygen
{E}lectrode during {H}igh {T}emperature {S}team
{E}lectrolysis},
journal = {Energies},
volume = {15},
number = {8},
issn = {1996-1073},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2022-02872},
pages = {2726 -},
year = {2022},
abstract = {Ni-gadolinia-doped ceria (GDC) based electrode materials
have drawn significant attention as an alternative fuel
electrode for solid oxide cells (SOCs) owing to mixed ionic
conductivity of GDC and high electronic and catalytic
activity of Ni. Moreover, the catalytic activity and
electrochemical performance of the Ni-GDC electrode can be
further improved by dispersing small quantities of other
metal additives, such as gold or molybdenum. Therefore,
herein, we considered gold and molybdenum modified Ni-GDC
electrodes and focused on the upscaling; hence, we prepared
5 × 5 cm2 electrolyte-supported single cells. Their
electrochemical performance was investigated at different
temperatures and fuel gas compositions. The long-term steam
electrolysis test, up to 1700 h, was performed at 900 °C
with −0.3 A·cm−2 current load. Lastly, post-test
analyses of measured cells were carried out to investigate
their degradation mechanisms. Sr-segregation and cobalt
oxide formation towards the oxygen electrode side, and
Ni-particle coarsening and depletion away from the
electrolyte towards the fuel electrode side, were observed,
and can be considered as a main reason for the degradation.
Thus, modification of Ni/GDC with Au and Mo seems to
significantly improve the electro-catalytic activity of the
electrode; however, it does not significantly mitigate the
Ni-migration phenomenon after prolonged operation},
cin = {IEK-9},
ddc = {620},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {1232 - Power-based Fuels and Chemicals (POF4-123)},
pid = {G:(DE-HGF)POF4-1232},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000786743900001},
doi = {10.3390/en15082726},
url = {https://juser.fz-juelich.de/record/908849},
}