Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(10)
Published: Nov. 21, 2023
Abstract
Tailoring
the
d‐orbital
electron
of
Fe
(III)
in
oxyhydroxide
is
highly
expected
to
realize
an
efficient
hydrazine
oxidation
reaction
(HzOR)
for
assisting
seawater
electrolysis.
Although
interface
engineering
can
effectively
change
states
on
sites
by
charge
injection
or
extraction,
most
interfaces
have
a
directional
electric
field
inaccessible
regulation.
Herein,
combination
iron
and
biphasic
nickel
phosphide
established
obtain
dual
built‐in
(BEF)
with
opposite
direction,
which
aims
manipulate
configuration
sites,
thereby
optimizing
binding
strength
activating
N
2
H
4
intermediates.
Both
computational
experimental
analyses
reveal
that
moderate
Fe─*N
originating
from
tailored
plays
key
role
accelerating
dehydrogenation.
Impressively,
such
promising
promotion
endows
catalyst
remarkable
HzOR
activity,
realizing
working
potentials
−8
44
mV
10
100
mA
cm
−2
alkaline
seawater,
respectively,
achieving
outstanding
long‐term
stability
over
h.
production
hybrid
electrolyzer
(HSE)
requires
dramatically
low
power
consumption
16.4
Wh
L
−1
≈100%
Faraday
efficiency.
It
believed
work
sheds
new
inspiration
regulation
obtaining
advanced
electrocatalysts.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(48)
Published: Sept. 6, 2023
The
continuous
oxidation
and
leachability
of
active
sites
in
Ru-based
catalysts
hinder
practical
application
proton-exchange
membrane
water
electrolyzers
(PEMWE).
Herein,
robust
inter-doped
tungsten-ruthenium
oxide
heterostructures
[(Ru-W)Ox
]
fabricated
by
sequential
rapid
metal
thermomigration
processes
are
proposed
to
enhance
the
activity
stability
acidic
oxygen
evolution
reaction
(OER).
introduction
high-valent
W
species
induces
valence
oscillation
Ru
during
OER,
facilitating
cyclic
transition
states
maintaining
operation
sites.
preferential
electronic
gain
heterostructure
significantly
stabilize
RuOx
on
WOx
substrates
beyond
Pourbaix
limit
bare
RuO2
.
Furthermore,
asymmetric
Ru-O-W
units
generated
around
interface
adsorb
intermediates
synergistically,
enhancing
intrinsic
OER
activity.
Consequently,
(Ru-W)Ox
not
only
demonstrate
an
overpotential
170
mV
at
10
mA
cm-2
excellent
300
h
electrolytes
but
also
exhibit
potential
for
applications,
as
evidenced
stable
0.5
A
PEMWE.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(7)
Published: Oct. 26, 2023
Abstract
Neutral
oxygen
evolution
reaction
(OER)
with
unique
reactive
environments
exhibits
extremely
slow
kinetics,
posing
significant
challenges
in
the
design
of
catalysts.
Herein,
a
built‐in
electric
field
between
tungstate
(Ni‐FeWO
4
)
adjustable
work
function
and
Lewis
acid
WO
3
is
elaborately
constructed
to
regulate
asymmetric
interfacial
electron
distribution,
which
promotes
accumulation
Fe
sites
tungstate.
This
decelerates
rapid
dissolution
under
OER
potentials,
thereby
retaining
active
hydroxyl
oxide
optimized
pathway.
Meanwhile,
enhances
adsorption
near
electrode
surface
improve
mass
transfer.
As
expected,
Ni‐FeWO
@WO
/NF
self‐supporting
achieves
low
overpotential
235
mV
at
10
mA
cm
−2
neutral
media
maintains
stable
operation
for
200
h.
Furthermore,
membrane
assembly
by
such
robust
stability
250
h
during
seawater
electrolysis.
deepens
understanding
reconstruction
catalysts
paves
way
development
energy
conversion
technologies.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(12), P. 14742 - 14749
Published: March 14, 2024
The
sluggish
kinetics
of
the
oxygen
evolution
reaction
(OER)
always
results
in
a
high
overpotential
at
anode
water
electrolysis
and
an
excessive
electric
energy
consumption,
which
has
been
major
obstacle
for
hydrogen
production
through
electrolysis.
In
this
study,
we
present
CoNi-LDH/Fe
MOF/NF
heterostructure
catalyst
with
nanoneedle
array
morphology
OER.
1.0
M
KOH
solution,
only
required
overpotentials
275
305
mV
to
achieve
current
densities
500
1000
mA/cm2
OER,
respectively.
catalytic
activities
are
much
higher
than
those
reference
single-component
CoNi-LDH/NF
Fe
catalysts.
improved
performance
can
be
ascribed
synergistic
effect
CoNi-LDH
MOF.
particular,
when
anodic
OER
is
replaced
urea
oxidation
(UOR),
relatively
lower
thermodynamic
equilibrium
potential
expected
reduce
cell
voltage,
same
reduced
by
80
40
mV,
voltage
drive
overall
splitting
(OUS)
1.55
V
100
Pt/C/NF||CoNi-LDH/Fe
two-electrode
electrolytic
cell.
This
value
60
compared
that
(OWS).
Our
indicate
reasonable
construction
significantly
give
rise
electrocatalytic
performance,
using
UOR
replace
OWS
greatly
consumption.
Carbon Neutralization,
Journal Year:
2024,
Volume and Issue:
3(2), P. 172 - 198
Published: Feb. 26, 2024
Abstract
Water
splitting
is
a
critical
process
for
the
production
of
green
hydrogen,
contributing
to
advancement
circular
economy.
However,
application
water
devices
on
large
scale
primarily
impeded
by
sluggish
oxygen
evolution
reaction
(OER)
at
anode.
Thus,
developing
and
designing
efficient
OER
catalysts
significant
target.
NiFe‐based
are
extensively
researched
as
excellent
electrocatalysts
due
their
affordability,
abundant
reserves,
intrinsic
activities.
they
still
suffer
from
long‐term
stability
challenges.
To
date,
few
systematic
strategies
improving
durability
have
been
reported.
In
this
review,
various
advanced
introduced.
Moreover,
challenges
in
alkaline
media,
including
iron
segregation,
structural
degradation,
peeling
substrate
summarized.
More
importantly,
enhance
highlighted
opportunities
discussed
facilitate
future
studies
electrolysis.
This
review
presents
design
strategy
anion
exchange
membrane
(AEM)
electrolyzers
overcome
OER,
which
also
emphasizes
importance
media
its
significance
achieving
large‐scale
commercialization.
Small,
Journal Year:
2024,
Volume and Issue:
20(33)
Published: March 22, 2024
Active
and
stable
nonnoble
electrocatalysts
for
oxygen
evolution
reaction
(OER)
hydrogen
(HER)
are
required
water
splitting
by
sustainable
electricity.
Here,
Mn
bonded
with
O
P
is
incorporated
to
modulate
Co
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(21)
Published: April 8, 2024
Abstract
Developing
non‐precious‐metal
electrocatalysts
that
can
operate
with
a
low
overpotential
at
high
current
density
for
industrial
application
is
challenging.
Heterogeneous
bimetallic
phosphides
have
attracted
much
interest.
Despite
hydrogen
evolution
reaction
(HER)
performance,
the
ordinary
oxygen
(OER)
performance
hinders
their
practical
use.
Herein,
it
shown
Fe‐doping
reverses
and
enlarges
interfacial
electrical
field
heterojunction,
turning
H
intermediate
favorable
binding
sites
HER
into
O
OER.
Specifically,
self‐supported
heterojunction
catalysts
on
nickel
foam
(CoP@Ni
2
P/NF
Fe‐CoP@Fe‐Ni
P/NF)
are
readily
synthesized.
They
only
require
overpotentials
of
266
274
mV
to
drive
large
1000
mA
cm
−2
(
j
)
OER,
respectively.
Furthermore,
water
splitting
cell
equipped
these
electrodes
requires
voltage
1.724
V
excellent
durability,
demonstrating
potential
application.
This
work
offers
new
insights
engineering
catalysts.
Materials Chemistry Frontiers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
phosphide
heterojunction
has
been
developed
as
an
efficient
catalyst
toward
methanol-assisted
seawater
splitting
with
good
activity
and
high
durability.
