Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 12, 2024
Abstract
Efficient
and
stable
bifunctional
catalysts
for
hydrogen
oxygen
evolution
reaction
play
an
important
role
in
realizing
economy.
In
this
study,
the
multi‐heterogeneous
interfacial
catalyst,
Ni
2
P@FeP@Co
P
(denoted
as
NFC),
with
asymmetric
built‐in
electric
field
is
successfully
designed
synthesized.
Benefiting
from
double
charge
balance
effect,
NFC
exhibits
superior
(HER)
(OER)
catalytic
activity.
Importantly,
NFC‐assembled
anion‐exchange
membrane
(AEM)
electrolyzer
enhanced
performance
remarkable
stability
at
industrial
current
densities
high
temperatures,
reaching
a
density
of
1000
mA
cm
−2
small
voltage
1.95
V.
The
results
dynamic
X‐ray
photoelectron
spectroscopy
tests
indicate
that
self‐reconfiguration
during
OER
provides
additional
active
sites
reaction.
functional
theory
(DFT)
demonstrate
(BIEF)
induces
adaptive
distribution
charge,
which
optimizes
adsorption
desorption
hydrogen/oxygen
intermediates
reaction,
thereby
enhancing
kinetics
overall
water
splitting
process.
This
work
presents
novel
strategies
design
highly
energy
conversion.
Energies,
Journal Year:
2024,
Volume and Issue:
17(22), P. 5712 - 5712
Published: Nov. 15, 2024
With
the
increasing
global
emphasis
on
green
energy
and
sustainable
development
goals,
electrocatalytic
oxygen
evolution
reaction
(OER)
is
gradually
becoming
a
crucial
focus
in
research
water
oxidation
for
hydrogen
generation.
However,
its
complicated
processes
associated
with
high
barrier
severely
limit
efficiency
of
conversion.
Recently,
layered
double
hydroxide
(LDH)
has
been
considered
as
one
most
promising
catalysts
alkaline
media.
Nonetheless,
lacking
deep
insight
into
kinetic
process
OER
detrimental
to
further
optimization
LDH
catalysts.
Therefore,
monitoring
catalytic
via
surface-sensitive
situ
spectroscopy
especially
important.
In
particular,
Raman
technique
capable
providing
fingerprint
information
surface
species
intermediates
operating
environment.
From
perspective
spectroscopy,
this
paper
provides
an
exhaustive
overview
progress
characterization
mechanism
catalysts,
theoretical
guidance
designing
materials.
Finally,
we
present
incisive
discussion
challenges
future
trend.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
Abstract
This
work
investigates
novel
improvements
in
FeNi‐layered
double
hydroxide
(LDH)/MIL‐88A
heterocomposite
for
sustainable
seawater
electrolysis
through
a
single‐step
dual
functionalization
process.
The
Fe/Ni
precursor
weight
ratio
is
optimized,
resulting
the
formation
of
smaller
LDH
petals
and
nano‐sized
MIL‐88A
metal–organic
framework,
which
transforms
into
clusters
Fe
2
O
3
nanospheres
within
nitrogen‐functionalized
carbon
matrix
over
NiFe
4
nano
upon
calcination.
Furthermore,
oxygen
vacancies,
nitrogen
are
attained
single
step
by
employing
thermal
ammonia
reduction,
significantly
improving
evolution
reaction
(OER)
hydrogen
(HER)
activities.
Particularly
vacancy
found
to
accelerate
O─O
coupling
OER
lowering
activation
barrier.
Likewise,
promotes
destabilizing
hydride
intermediates
HER
potentially
facilitating
faster
proton‐coupled
electron
transfer.
Hence,
optimized
electrode
achieves
current
densities
200
mA
cm
−2
at
overpotentials
350
240
mV
respectively.
chronopotentiometry
stability
tests
confirms
electrode's
durability
h
20
alkaline
electrolyte.
electrode,
composed
cost‐effective
environmentally
friendly
materials,
demonstrates
robustness
electrolytes,
positioning
it
as
strong
candidate
practical
water
applications.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 16, 2025
Abstract
Constructing
synergistic
dual
sites
has
been
well‐recognized
as
an
updated
avenue
in
constructing
binary‐component
Pt/support
compounds
such
materials
undergo
undesirable
interfacial
barriers
and
complicated
synthesis.
Here
integration
of
ultrafine
Pt
nanocrystals
on
oxygen‐deficient
CoMoO
4
nanosheets
is
reported
that
achieved
superior
alkaline
hydrogen
evolution
reaction
(HER)
activity
(110
mV
@
1000
mA
cm
−2
)
with
a
reversed
deliver
effect
between
bifunctional
active
sites.
With
perceptions
from
comprehensive
experimental
theoretical
results,
the
HER
process
occurs
three
steps:
pronounced
water
dissociation
capability
,
facile
transfer
to
nanoparticles,
optimized
desorption
catalytic
site.
Thanks
site
effect,
Pt/CoMoO
catalyst
boosts
large‐density
seawater
electrolysis
anion
exchange
membrane
electrolyzer
(AEM).
This
work
not
only
provides
valid
intensification
strategy
aimed
at
support‐type
electrocatalysts
but
also
takes
insights
into
dual‐site
mechanisms
for
high‐performance
HER.
