Applied Sciences,
Год журнала:
2024,
Номер
14(19), С. 8923 - 8923
Опубликована: Окт. 3, 2024
R&D
in
the
area
of
high-temperature
symmetrical
electrochemical
devices
is
needed
to
meet
challenges
hydrogen
energy.
In
present
study,
effect
Fe2O3
and
CuO
sintering
aids
on
properties
highly
conductive
solid
electrolyte
La0.8Sr0.2Ga0.8Mg0.2O3−δ
La0.6Sr0.4FeO3−δ
electrodes
for
oxide
fuel
cells
was
investigated.
It
shown
that
use
leads
an
improvement
grain
boundary
conductivity
allows
us
reduce
temperature
obtain
a
dense
with
same
level
conductivity.
first
time
nature
affect
electrode
activity
differently
depending
gas
environment
(air
or
hydrogen).
On
basis
analysis
impedance
spectra
by
distribution
relaxation
times,
assumptions
were
made
about
rate-determining
steps
oxidation
oxygen
reduction.
can
change
temperature.
found
among
studied
electrodes,
3
wt.%
sintered
at
1050
°C
optimal
terms
oxidizing
reducing
atmospheres.
Science China Materials,
Год журнала:
2024,
Номер
67(5), С. 1471 - 1480
Опубликована: Апрель 17, 2024
Herein,
we
report
a
phase-transformed
fuel
electrode
to
carry
out
the
reversible
CO–CO2
conversion
in
solid
oxide
electrochemical
cell
(RSOC),
which
is
composed
of
self-assembled
FeRu
bimetallic
nanoparticles
and
Ruddlesden-Popper
Pr0.8Sr1.2Fe1−x−yRuxMoyO4
(FeRu@PSFRM).
Electrochemical
impedance
spectra
their
corresponding
distribution
relaxation
time
demonstrate
that
sub-electrode
reaction
process
frequency
ranging
100–102
Hz,
including
gas
adsorption,
dissociation,
ionization
reactions
on
surface,
predominantly
dominates
entire
process.
The
single
with
FeRu@PSFRM
generates
maximum
output
power
density
170
W
cm−2
at
800°C
(SOFC)
mode,
while
yields
current
−0.256
A
1.3
V
electrolysis
(SOEC)
mode.
In
addition,
reliable
mutual
has
experienced
"activation-stabilization-degradation"
three
obvious
stages
first
42-h
SOFC-SOEC
cycling
testing.
Fortunately,
degraded
can
be
regenerated
by
oxidizing
it
then
retreating
reductive
atmosphere.
Our
findings
reveal
material
generated
in-situ
exsolution
technique
promising
candidate
for
efficient
durable
RSOC.
Energy & environment materials,
Год журнала:
2024,
Номер
7(5)
Опубликована: Апрель 16, 2024
Solid
oxide
electrolysis
cells
(SOECs),
displaying
high
current
density
and
energy
efficiency,
have
been
proven
to
be
an
effective
technique
electrochemically
reduce
CO
2
into
CO.
However,
the
insufficiency
of
cathode
activity
stability
is
a
tricky
problem
addressed
for
SOECs.
Hence,
it
urgent
develop
suitable
materials
with
excellent
catalytic
further
practical
application
Herein,
reduced
perovskite
oxide,
Pr
0.35
Sr
0.6
Fe
0.7
Cu
0.2
Mo
0.1
O
3‐δ
(PSFCM0.35),
developed
as
SOECs
electrolyze
.
After
reduction
in
10%
H
/Ar,
nanoparticles
are
exsolved
from
PSFCM0.35
lattice,
resulting
phase
transformation
cubic
Ruddlesden–Popper
(RP)
more
oxygen
vacancies.
The
metal
tightly
attached
substrate
afford
active
sites
accelerate
adsorption
dissociation
on
surface.
significantly
strengthened
capacity
obtained
after
demonstrated
by
situ
Fourier
transform‐infrared
(FT‐IR)
spectra.
Symmetric
(R‐PSFCM0.35)
electrode
exhibit
low
polarization
resistance
0.43
Ω
cm
at
850
°C.
Single
R‐PSFCM0.35
display
outstanding
2947
mA
−2
°C
1.6
V.
In
addition,
also
proved
operating
800
applied
constant
600
100
h.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 1, 2024
Abstract
Perovskite
oxides,
particularly
double
perovskite
have
drawn
significant
research
interest
within
the
fields
of
solid‐state
chemistry
and
materials
science.
As
a
quintessential
oxide,
Sr
2
Fe
1.5
Mo
0.5
O
6‐δ
(SFM)
has
unique
electronic,
magnetic,
catalytic
properties.
These
attributes
make
it
promising
candidate
for
energy
conversion
storage
applications.
This
review
offers
comprehensive
overview
advancements
using
SFM
across
various
applications,
including
solid
oxide
cells,
protonic
ceramic
electrocatalysis.
Notably,
highlights
emerging
optimization
strategies
that
enhance
functionality
based
on
fundamental
understanding
reaction
mechanisms.
The
concludes
by
discussing
persistent
challenges
facing
SFM‐based
functional
materials,
as
well
their
prospects,
considering
both
industrial
Highlights of Sustainability,
Год журнала:
2024,
Номер
3(2), С. 205 - 239
Опубликована: Май 9, 2024
The
atmospheric
carbon
dioxide
(CO2)
accumulation
(2–2.5
ppmv/year)
is
the
result
of
enormous
gap
between
its
emissions
(37
Gton/year)
and
capture,
storage,
utilization
(<500
Mton/year).
Climate
has
been
dramatically
affected
due
to
failure
natural
sinks,
in
working
effectively.
To
address
this
Gton-scale
gap,
numerous
uses
applications
are
needed
particularly,
those
consuming
vast
volumes
compound
and/or
rendering
longevous
products
or
long
lifecycle
services.
Thus,
(CU)
can
be
seen
as
step
close
cycle.
Among
CU,
R&D
on
CO2
chemical
conversion
proposed
a
variety
processes,
with
different
degrees
developmental
maturity.
These
process
technologies
could
efficiently
effectively
integrated
into
refineries
upgrade
emitted
CO2.
A
technology
pipeline
consisting
database
these
processes
market
status
should
defined
based
published
scientific
results
patents.
Then,
an
innovative
top-down
methodology
eco-design
configurations
that
refinery,
warrant
sustainable
cycle
(in
terms
energy,
environment,
economy)
change
ways
producing
fuels,
chemicals,
materials.
Additionally,
used
identify
research
development
gaps
needs,
for
orienting
science
investments
measures.
Hopefully,
will
implemented
circular
C-based
economy
underpin
decarbonized
industry.
Materials,
Год журнала:
2025,
Номер
18(6), С. 1272 - 1272
Опубликована: Март 13, 2025
Solid
oxide
cells
(SOCs)
can
operate
efficiently
in
solid
fuel
cell
(SOFC)
and/or
electrolysis
(SOEC)
modes,
and
are
one
of
the
most
promising
electrochemical
devices
for
energy
conversion
storage,
facilitating
integration
renewable
energies
with
electric
grid.
However,
SOC
electrodes
suffer
performance
stability
issues,
especially
case
when
SOCs
fueled
by
cheaper
more
available
fuels
such
as
methane
natural
gas.
Typical
Ni-YSZ
cermet
problems
coarsening,
carbon
deposition,
sulfur
poisoning.
Therefore,
developing
new
using
novel
design
strategies
is
crucial.
In
this
review
work,
electrode
development
including
situ
exsolution
nanoparticles,
multi-elemental
nanocatalysts,
nanofiber
materials
have
been
reviewed
summarized
SOCs.
Nanofiber
exsolved
which
combine
advantages
a
unique
microstructure
stable
active
great
interest
significantly
contribute
to
high-performance
