Nanomaterials,
Год журнала:
2024,
Номер
14(16), С. 1362 - 1362
Опубликована: Авг. 19, 2024
Metal
oxides
containing
La,
Mn,
and
Co
cations
can
catalyze
oxygen
reduction
reactions
(ORRs)
in
electrochemical
processes.
However,
these
materials
require
carbon
support
optimal
interactions
between
both
compounds
to
be
active.
In
this
work,
two
approaches
prepare
composites
of
La-Mn-Co-based
over
xerogel
were
developed.
Using
sol-gel
methods,
either
the
metal-based
material
was
deposited
on
existing
or
vice
versa.
The
metal
oxide
selected
LaMn0.7Co0.3O3
perovskite,
which
has
good
catalytic
behavior
selectivity
towards
direct
ORRs.
All
as-prepared
tested
for
ORRs
alkaline
liquid
electrolytes
characterized
by
diverse
physicochemical
techniques
such
as
XRD,
XPS,
SEM,
N2
adsorption.
Although
perovskite
structure
decomposed
failed
form
using
those
situ
exhibited
great
activity,
ascribed
strengthening
via
C-O-M
covalent
bonds
formation
new
active
sites
MnO/Co
heterointerfaces.
Moreover,
Co-Nx-C
species
are
formed
during
synthesis
xerogel.
These
possess
a
strong
activity
ORR.
Therefore,
synthesizing
exhibit
best
performance
ORR,
presence
heterointerfaces
compounds.
small
nanoparticle
size
leads
higher
number
available
reaction.
Nanomaterials,
Год журнала:
2025,
Номер
15(4), С. 256 - 256
Опубликована: Фев. 8, 2025
This
review
explores
the
recent
advancements
in
catalyst
technology
for
hydrogen
production,
emphasizing
role
of
catalysts
efficient
and
sustainable
generation.
involves
a
comprehensive
analysis
various
materials,
including
noble
metals,
transition
carbon-based
nanomaterials,
metal–organic
frameworks,
along
with
their
mechanisms
performance
outcomes.
Major
findings
reveal
that
while
metal
catalysts,
such
as
platinum
iridium,
exhibit
exceptional
activity,
high
cost
scarcity
necessitate
exploration
alternative
materials.
Transition
single-atom
have
emerged
promising
substitutes,
demonstrating
potential
enhancing
catalytic
efficiency
stability.
These
underscore
importance
interdisciplinary
approaches
to
design,
which
can
lead
scalable
economically
viable
production
systems.
The
concludes
ongoing
research
should
focus
on
addressing
challenges
related
stability,
scalability,
integration
renewable
energy
sources,
paving
way
economy.
By
fostering
innovation
development,
this
work
aims
contribute
towards
cleaner
solutions
more
resilient
future.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
17(9), С. 14109 - 14118
Опубликована: Фев. 24, 2025
Constructing
multimetallic
alloy
heterostructures
with
the
desired
interface
and
phase
separation
is
a
promising
method
to
optimize
electrochemical
properties
of
noble
metal
nanomaterials.
Nevertheless,
tailoring
elemental
distribution
lattice
structures
such
nanomaterials
still
poses
major
difficulties.
In
this
study,
Cu-PtNi
nanowires
coupling
PtNi
PtNiCu
active
sites
are
fabricated
by
seeded
synthesis
on
Cu
template.
Owing
oxophilic
nature
anti-CO
poisoning
capability
facets,
as-synthesized
exhibit
enhanced
methanol
oxidation
reaction
(MOR)
performance
(7.73
A
mgPt–1),
outperforming
those
alloy,
commercial
Pt/C
catalysts.
Theoretical
calculations
in
conjunction
operando
infrared
reflection
absorption
spectroscopy
demonstrate
that
lattice-compressed
Pt3Ni
(111)–Pt3NiCu
(100)
stands
out
as
highly
efficient
site,
which
promotes
OH
intermediate
adsorption
simultaneously
weakens
CO
during
MOR.
addition,
at
10
mA
cm–2,
also
an
impressively
reduced
overpotential
35.2
mV
for
hydrogen
evolution
(HER)
under
alkaline
conditions.
This
work
offers
strategy
boost
electrocatalytic
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
Nanomaterials,
Год журнала:
2025,
Номер
15(2), С. 103 - 103
Опубликована: Янв. 10, 2025
In
this
work,
a
series
of
BaxMn0.7Cu0.3O3
samples
(x:
1,
0.9,
0.8,
and
0.7,
BxMC)
was
synthesized,
characterized,
used
as
catalysts
for
CO
oxidation
reaction.
All
formulations
were
active
in
the
tested
conditions.
A
correlation
between
electrical
conductivity,
obtained
by
impedance
spectroscopy,
reducibility
samples,
H2-TPR,
observed.
The
Ba0.8Mn0.7Cu0.3O3
composition
(B0.8MC)
showed
best
catalytic
performance
(comparable
to
that
1%
Pt/Al2O3
reference
sample)
during
tests
conducted
under
conditions
similar
those
found
exhaust
gases
current
gasoline
engines.
characterization
data
suggest
simultaneous
presence
high
Mn(IV)/Mn(III)
surface
ratio,
oxygen
vacancies,
reduced
copper
species,
these
two
latter
being
key
properties
ensuring
conversion
percentage
both
are
sites
oxidation.
reaction
temperature
reactant
atmosphere
seem
be
most
important
factors
achieving
good
performance,
they
strongly
determine
location
stability
species.
Nanomaterials,
Год журнала:
2024,
Номер
14(16), С. 1334 - 1334
Опубликована: Авг. 10, 2024
Mixed
oxides
featuring
perovskite-type
structures
(ABO3)
offer
promising
catalytic
properties
for
applications
focused
on
the
control
of
atmospheric
pollution.
In
this
work,
a
series
BaxMnO3
(x
=
1,
0.9,
0.8
and
0.7)
samples
have
been
synthesized,
characterized
tested
as
catalysts
CO
oxidation
reaction
in
conditions
close
to
that
found
exhausts
last-generation
automotive
internal
combustion
engines.
All
were
observed
be
active
during
CO-TPRe
tests,
with
Ba0.7MnO3
(B0.7M)
being
most
one,
it
presents
highest
amount
oxygen
vacancies
(which
act
sites
oxidation)
Mn
(IV),
which
features
levels
reducibility
best
redox
properties.
B0.7M
has
also
showcased
high
stability
reactions
at
300
°C,
even
though
slightly
lower
conversion
is
achieved
second
consecutive
cycle.
This
performance
appears
related
decrease
(IV)/Mn
(III)
ratio.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 22, 2024
Abstract
Perovskite‐type
oxides
are
widely
employed
as
oxygen
evolution
reaction
(OER)
electrocatalysts
due
to
their
tunable
composition,
diverse
structure,
abundant
natural
reserves,
remarkable
stability,
and
low
cost.
The
intrinsic
OER
electrocatalytic
activity
of
these
perovskite
is
generally
enhanced
by
improving
conductivity,
increasing
specific
surface
area,
optimizing
the
adsorption
oxygen‐containing
intermediates.
This
achieved
through
rationally
designed
strategies,
including
compositional
engineering,
defect
hybridization,
regulation.
In
this
review,
recent
advances
in
for
summarized,
with
a
focus
on
exploring
structure‐performance
relationships.
review
provides
brief
introduction
application
OER,
followed
classification
characteristics
oxides.
primary
catalytic
mechanisms,
well‐established
descriptors
discussed.
key
strategies
concentrated
enhancing
activity,
composition
reconstruction.
Finally,
challenges
opportunities
developing
high‐performance
presented.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
A
cation
exchange
method
enables
the
synthesis
of
highly
crystalline
2D
Ni
x
S
nanoplates
with
fine-tuned
morphology.
These
exhibit
excellent
OER
performance,
achieving
a
329
mV
overpotential
at
10
mA
cm
−2
and
52
dec
−1
Tafel
slope.
Designing
highly
efficient,
stable,
and
pH-universal
perovskites
for
hydrogen
evolution
reaction
(HER)
is
urgently
needed
yet
remains
a
grand
challenge.
Herein,
titanium-containing
strontium
ruthenate
(SrTi
