ACS Sensors,
Journal Year:
2024,
Volume and Issue:
9(12), P. 6492 - 6501
Published: Nov. 1, 2024
Perovskite
oxides
are
promising
candidates
for
chemiresistive-type
gas
sensors
owing
to
their
exceptional
thermal
and
chemical
stability
during
solid–gas
reactions.
However,
perovskites
suffer
from
critical
issues
such
as
low
surface
area
poor
activity,
which
negatively
influence
the
sensing
characteristics.
While
metal
nanoparticles
can
be
incorporated
in
improve
reactivity,
fundamental
incompatibility
between
catalytic
metals
perovskite
often
leads
substantial
structural
degradation
well
phase
instability.
Herein,
we
overcome
this
challenge
through
introduction
of
an
intermediary
that
forms
coherent
interfaces
with
both
catalyst
metals.
Specifically,
present
case
study
p-type
La0.8Ca0.2Fe0.98Pt0.02O3
perovskite,
whose
hole
accumulation
layer
was
modulated
by
incorporation
metal–organic
framework
(MOF)-derived
n-type
α-Fe2O3
decorated
highly
dispersed
Pt
catalysts.
The
resulting
composite
exhibited
significantly
improved
activity
over
nonmodified
La0.8Ca0.2FeO3
leading
chemiresistive
performance
toward
acetone
(Rg/Ra
=
39.8
10
ppm
at
250
°C)
high
cross-sensitivity
against
interfering
gases.
Importantly,
our
findings
reaffirm
interfacial
engineering
facilitating
reactions
on
and,
doing
so,
effectively
provide
a
general
synthetic
guideline
design
perovskite-based
chemiresistors.
Fuel Processing Technology,
Journal Year:
2023,
Volume and Issue:
253, P. 108022 - 108022
Published: Dec. 30, 2023
In
light
of
the
increasing
concern
for
sustainable
growth
and
development,
there
is
a
rising
demand
energy-efficient
conversion
processes.
Chemical
Looping
(CL)
technology
has
emerged
as
promising
solution
that
utilizes
chemical
intermediates,
such
metal
oxides
or
other
derivatives,
to
decompose
complex
reactions
into
multiple
sub-reaction
steps.
This
innovative
approach
enables
separation
overall
reaction
distinct
stages,
which
can
be
conducted
in
separate
reactors.
Consequently,
direct
contact
between
inert
substances
present
reactant
feedstocks
desired
product
avoided,
leading
reduced
purification
costs.
state-of-the-art
literature
review
provides
an
updated
overview
potential
perovskite
structures
looping
technology.
Perovskite
materials
exhibit
desirable
properties,
including
excellent
oxygen
transport
capabilities,
high
stability,
adjustable
redox
making
them
ideal
candidates
CL
applications.
By
examining
recent
advancements
research
efforts,
this
aims
shed
on
current
state
based
CL,
its
challenges,
future
prospects.
The
findings
presented
here
contribute
understanding
enabling
includes
two
major
parts,
first
part
dedicated
structure
perovskites
corresponding
classifications
cell
structure,
ionic
size
cation
phase,
dimension,
while
second
work
focuses
applications
those
seven
different
technologies,
combustion
(CLC),
reforming
(CLR),
gasification
(CLG),
uncoupling
(CLOU),
air
(CLAS),
dehydrogenation
(CLDH),
epoxidation
(CLEPOX).
