Inorganic Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 22, 2024
By
utilizing
Metal-organic
framework
(MOF)
materials
as
a
base,
constructing
electrocatalysts
with
heterogeneous
structures
offers
advantages
for
catalyzing
water
splitting.
In
this
study,
hollow
nanocatalyst,
Ir-MIL-88A@NiFe-LDHs,
was
prepared
by
growing
layered
double
hydroxides
(LDHs)
shell
on
MIL-88A
substrate.
The
catalyst
shows
excellent
oxygen
evolution
reaction
(OER)
performance
in
1.0
M
KOH
solution,
requiring
only
217
mV
overpotential
to
achieve
current
density
of
10
mA
cm
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 4, 2025
Abstract
Metal
oxyhydroxides
(MOOHs)
as
the
active
phase
of
transition
metal‐oxide
(TMOs)
electrodes
in
oxygen
evolution
reaction
(OER)
are
limited
by
unsatisfactory
electrochemical
activity
and
stability
during
high‐current
conditions.
Herein,
heterostructure
high‐valent
IrO
x
(Ir
n+
,
n>4)
combined
with
FeNi
3
OOH
via
asymmetric
electron
transport
is
deliberately
designed
on
carbon
cloth
(IrO
‐FeNi
OOH/CC)
a
promising
OER
electrocatalyst
for
industrial
deployments.
Experimental
DFT
calculations
reveal
that
transfer
from
Ir
to
low‐spin
orbital
Fe/Ni
sites
bridged
O
2−
(Ir─O─Ni/Fe
bonds)
at
interfaces
induces
formation
species.
This
process
tailors
d‐band
center
sites,
thereby
reducing
energy
barrier
rate‐determining
step
*
OER.
The
elevated
enables
OOH/CC
achieve
an
ultra‐low
overpotential
241
mV
200
mA
cm
−2
along
remarkable
160
h
under
large
current
conditions
(outperforming
commercial
2
/CC).
work
offers
basis
rationally
designing
analyzing
potential
role
precious‐metal‐based
electrocatalysts
related
processes.
Progress in Natural Science Materials International,
Год журнала:
2023,
Номер
33(1), С. 74 - 82
Опубликована: Фев. 1, 2023
Transition
metal
phosphides
have
been
recognized
as
promising
electrocatalysts
for
oxygen
evolution
reaction
(OER)
due
to
their
low
cost
and
high
activity.
However,
the
insufficient
exposed
active
region
limited
OER
performance.
Recently,
introduction
of
sacrificial
dopants
has
considered
an
effective
strategy
enlarge
surface
area.
Herein,
Zn
are
introduced
in
NiFe
phosphide
(NiFeZnP)
nanosheet,
which
work
generate
more
sites
promote
formation
NiFeOOH
phase
during
process.
The
optimized
Zn-doped
NiFeP
catalyst
shows
overpotential
≈203
mV
reach
a
current
density
10
mA
cm−2
1
M
KOH,
stability
100
h
at
1000
cm−2.
Overall,
this
provides
doping
prepare
highly
efficient
electrocatalysts.
Industrial & Engineering Chemistry Research,
Год журнала:
2023,
Номер
62(10), С. 4356 - 4363
Опубликована: Март 7, 2023
Oxygen
evolution
reaction
(OER)
is
the
bottleneck
of
electrocatalytic
water
splitting
due
to
its
sluggish
proton-coupled
four-electron-transfer
kinetics.
Interface
engineering
has
been
regarded
as
an
effective
strategy
promote
OER
performance
transition-metal
oxide
(TMO)
electrocatalysts.
In
this
study,
we
successfully
construct
amorphous–crystalline
interfaces
NiFePx/NiFeOx
nanosheets
with
substantial
oxygen
vacancies
through
controllable
surface
phosphorization.
Experimental
results
confirm
that
unique
structure
possesses
fast
charge
transfer,
abundant
active
sites,
and
enhanced
intrinsic
activity,
resulting
in
outstanding
performance.
The
optimized
displays
a
low
overpotential
238
mV
at
20
mA
cm–2
excellent
stability
1
M
KOH
electrolyte.
This
study
provides
TMOs
alkaline
splitting.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 27, 2024
Abstract
In‐depth
comprehension
and
improvement
of
the
sluggish
hydrogen
evolution
kinetics
in
alkaline
media
is
highly
important
to
enhance
activity
durability
anion
exchange
membrane
water
electrolysis
(AEMWE)
for
green
production.
Herein,
a
atom‐terminated
core–shell
PdH@Ru
nanobamboos
(NBs)
developed
by
synergetic
strategy
epitaxial
growth
situ
DMF
hydrogenation.
The
synthesized
NBs
demonstrate
exceptional
reaction
(HER)
media,
requiring
only
14
mV
overpotential
at
10
mA
cm
−2
,
surpassing
those
commercial
Pt/C
(35
mV)
H‐free
Pd@Ru
(37
mV).
Furthermore,
an
AEMWE
device
using
as
cathode
also
achieves
current
density
1000
−
2
≈1.80
V
1.0
m
KOH
60
°C,
with
continuous
operation
50
h.
operando
spectroscopic
analysis
functional
theory
calculations
suggest
that
insertion
into
induces
tensile
strain
on
Ru
surface
layer,
altering
Pd/Ru
electronic
structure
weakening
H
adsorption,
thereby
enhancing
HER
efficiency.
bamboo‐like
hollow
features
numerous
active
sites,
which
contribute
optimization
electron/mass
diffusion
electrolyte.
This
work
provides
potential
high‐efficiency
cathodic
electrocatalyst
industrial
