Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 17, 2024
Abstract
Developing
efficient
and
low‐cost
electrocatalysts
with
exceptional
durability
electrocatalytic
activity
for
the
acidic
oxygen
evolution
reaction
(OER)
presents
a
significant
challenge,
primarily
owing
to
irreversible
dissolution
of
in
electrolytes.
Here,
rutile‐structured
(RuSnSbReF)O
x
high
entropy
solid
solution
is
successfully
fabricated
on
substrate
corrosion‐resistant
titanium
via
high‐temperature
sintering
technique.
The
electrocatalyst
OER
achieves
super‐low
overpotential
156
mV
small
Tafel
slope
23.87
dec
−1
at
current
density
10
mA
cm
−2
0.5
M
H
2
SO
4
solution.
A
high‐stable
operation
potential
performed
long‐term
measurement
213
h
100
.
There
lower
energy
barrier
rate‐determining
step
(RDS)
Ruthenium
(Ru)‐Rhenium
(Re)
bridge
site
comparison
that
other
sites
OER.
reservoir‐like
Re
species
can
bestow/save
electrons
Ru
through
O‐bridges,
favorably
adjusting
electronic
structure
oxidation
state.
This
investigation
opens
feasible
avenue
develop
an
durable
Ru‐based
toward
practical
applications
electrochemical
industry
media.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 28, 2025
Abstract
Direct
seawater
electrolysis
is
key
for
achieving
sustainable
green‐hydrogen
production
and
transitioning
toward
a
decarbonized
energy
system.
However,
its
performance
limited
by
significant
challenges,
mainly
catalyst
instability,
which
caused
excessive
reconstruction,
low
catalytic
activity,
aggressive
chlorine‐corrosion.
Herein,
high‐electronegativity
F
introduced
into
NiFe
layered
double‐hydroxide
(F‐NiFe‐LDH)
through
fluorination
engineering
to
induce
electron‐deficient
regions
around
Ni,
thus
creating
abundant
intrinsic
high‐valence
Ni
sites.
Correspondingly,
the
features
of
weak
reconstruction
accompanied
high
stability,
chlorophobic
surface,
high‐activity
lattice
oxygen
are
produced
on
F‐NiFe‐LDH,
confirmed
detailedly
experiment
theory.
Consequently,
F‐NiFe‐LDH
exhibits
superior
evolution
reaction
(OER)
activity
with
overpotentials
306
375
mV
reach
500
mA
cm
−2
at
alkaline
simulated
seawater,
respectively.
Also,
it
demonstrates
chlorine‐corrosion
resistance,
along
ultra‐stability
over
1000
h
without
degradation,
structural
collapse,
or
chlorine
oxidation
reaction.
Furthermore,
an
anion
exchange
membrane
electrolyzer
assembled
anode
shows
consumption
only
4.87
kWh
Nm
−3
hydrogen
production.
This
work
provides
inspiration
designing
corrosion‐resistance
electrocatalysts
aimed
oxidation‐free
electrolysis,
simultaneously
achieve
stability
OER
activity.
International Journal of Energy Research,
Год журнала:
2024,
Номер
2024(1)
Опубликована: Янв. 1, 2024
Implementing
a
rational
structure
and
leveraging
unique
components
are
crucial
to
advancing
high‐performance
supercapacitors
(SCs)
essential
unlocking
their
full
potential.
Herein,
we
successfully
developed
facile
solvothermal
synthetic
approach
for
fabricating
NiCo‐layered
double
hydroxide
(NCLDH)
nanosheets
supercapacitor
applications.
NCLDH
were
synthesized
with
precise
control
over
morphology
size
by
optimizing
the
H
2
O‐to‐DMF
ratios.
Besides,
correlations
between
proportion
of
solvent
resulting
properties
NCLDHs
analyzed.
The
formation
vertical
orientation
interwoven
structures
was
observed
in
NCLDH‐21,
where
ratio
O
DMF
:
1.
display
characteristics
that
distinguish
them
from
other
materials.
NCLDH‐21
nanostructures
had
many
benefits,
including
increasing
number
active
sites
could
be
used
redox
reactions,
facilitating
efficient
collection
transport
electrons
ions,
reducing
aggregation,
which
effectively
stabilized
volume
variation
matter
during
cycling.
optimized
exhibit
remarkable
specific
capacitance
2,054
F
g
−1
at
1
A
exceptional
rate
capability.
assembled
hybrid
SC
(HSC)
achieved
an
impressive
energy
density
67.67
Whr
kg
,
demonstrating
cycling
stability.
Hence,
electrochemical
outcomes
demonstrate
immense
potential
as
cost‐effective
electrode
material
next‐generation
energy‐storage
devices.
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 9, 2025
The
design
of
highly
efficient,
stable,
and
nonprecious-metal-based
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
has
been
a
major
research
topic
in
field
hydrogen
production
from
electrolytic
water
splitting.
In
this
work,
novel
hierarchical
hollow
NiCo
layered
double
hydroxide
(NiCo
LDH)
with
Cu-TCPP
(TCPP
=
tetrakis(4-carboxyphenyl)-porphyrin)
intercalation
(denoted
as
X-CT/LR,
where
X
is
amount
addition)
was
successfully
fabricated
by
using
zeolite
imidazole
framework-67
(ZIF-67)
template.
Among
them,
1-CT/LR
superior
OER
activity
stability,
requiring
only
low
overpotential
204
mV
to
reach
current
density
10
mA/cm2.
experimental
results
show
that
introduced
Cu-TCPP,
addition
being
an
active
center
itself,
also
acts
electron
transfer
medium
interlayer
enhance
conductivity
material.
Meanwhile,
structure
domain-limiting
effect
LDH
ensure
dispersion
stabilization
which
favorable
give
full
play
synergistic
catalytic
two
components.
This
work
provides
facile
strategy
obtain
electrocatalyst
Catalysts,
Год журнала:
2025,
Номер
15(3), С. 219 - 219
Опубликована: Фев. 26, 2025
Hydrogen
production
from
water
electrolysis
offers
a
highly
promising
and
sustainable
route
to
solve
the
energy
crisis.
However,
it
is
severely
limited
by
sluggish
kinetics
of
oxygen
evolution
reaction
(OER)
occurring
on
anode.
Herein,
employing
carbon
dots
functionalized
with
benzene
sulfonate
groups
(BS-CDs)
as
distinctive
inductor,
Co(OH)2
catalyst
featuring
abundant
defects
was
synthesized
for
an
enhanced
OER.
The
hydrophilic
nature
BS-CDs
exerts
significant
interfacial
induction
effect
growth
dynamics
Co(OH)2,
fostering
formation
elevated
crystal
substantial
quantity
vacancies.
resulting
BS-CDs/Co(OH)2
requires
overpotential
only
340
mV
achieve
current
density
10
mA
cm−2
in
alkaline
media,
demonstrating
markedly
improved
OER
activity
compared
pristine
N-CDs/Co(OH)2
induced
amine-modified
CDs.
Furthermore,
structural
integrity
maintained,
retention
rate
92%
observed
following
20
h
stability
assessment.
This
work
provides
novel
approach
developing
cost-effective
transition
metal
catalysts
that
exhibit
exceptional
catalytic
efficiency
excellent
Abstract
The
design
and
synthesis
of
MOF‐based
heterostructures
have
emerged
as
a
promising
approach
for
optimizing
the
performance
oxygen
evolution
reaction
(OER).
In
this
study,
we
report
nickel‐benzene
dicarboxylate
(Ni‐BDC)/layered
double
hydroxide
(LDH)
heterostructured
catalyst
on
nickel
foam
(NF).
Driven
by
difference
in
their
work
functions,
interfacial
electrons
transfer
from
Ni‐LDH
to
Ni‐BDC
elevate
valence
state
Ni
Ni‐LDH,
thereby
facilitating
formation
active
sties
improving
catalytic
activity.
Ni‐BDC/LDH‐0.5@NF
demonstrated
superior
OER
requiring
an
overpotential
only
218
mV
achieve
current
density
10
mA
cm
−2
low
Tafel
slope
108
dec
−1
.
Furthermore,
exhibits
exceptional
electrochemical
stability.
This
provides
effective
constructing
MOF/LDH
heterostructure
catalysts
offers
valuable
insights
into
structure‐activity
relationship
performance.
