Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Май 29, 2025
Abstract
Direct
seawater
electrolysis
at
ampere-level
current
densities,
powered
by
coastal/offshore
renewables,
is
an
attractive
avenue
for
sustainable
hydrogen
production
but
undermined
chloride-induced
anode
degradation.
Here
we
demonstrate
the
use
of
hexafluorophosphate
(PF₆⁻)
as
electrolyte
additive
to
overcome
this
limitation,
achieving
prolonged
operation
over
5,000
hours
1
A
cm
−2
and
2300
2
using
NiFe
layered
double
hydroxide
(LDH)
anode.
Together
with
experimental
findings,
PF₆⁻
can
intercalate
into
LDH
interlayers
adsorb
onto
electrode
surface
under
applied
electric
field,
blocking
Cl⁻
stabilizing
Fe
prevent
segregation.
The
constant-potential
molecular
dynamics
simulations
further
reveal
accumulation
high
concentrations
PF
6
−
on
that
effectively
exclude
Cl
,
mitigating
corrosion.
Our
work
showcases
synchronous
interlayer
engineering
single
non-oxygen
anion
species
enable
rejection
marks
a
crucial
step
forward
in
electrolysis.
Abstract
Given
the
rising
global
energy
demand
and
increasing
emphasis
on
environmental
protection,
development
of
renewable
conversion
technologies
to
replace
fossil
fuels
has
emerged
as
a
critical
research
priority.
Among
these
technologies,
seawater
electrocatalysis
garnered
attention
high‐efficiency
environmentally
friendly
approach.
This
review
summarizes
recent
advancements
in
for
resource
extraction,
covering
reaction
mechanisms
hydrogen
production
via
electrolysis
progress
electrocatalytic
materials.
Specifically,
we
discuss
materials
based
non‐precious
metals,
precious
nonmetals,
bifunctional
electrocatalysts.
Additionally,
inorganic
pollutants
(e.
g.,
hydrazine,
sulfides)
organic
compounds
urea,
microplastics)
is
reviewed,
emphasizing
its
significance
marine
utilization
remediation.
We
also
explore
electrochemical
strategies
extracting
valuable
metal
ions,
such
calcium,
magnesium,
uranium,
lithium,
abundant
seawater.
Although
faces
challenges
terms
cost
technical
scalability,
technology
interdisciplinary
collaboration
offer
promising
prospects
commercialization
with
potential
make
substantial
contributions
sustainable
development.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 16, 2025
Abstract
Noble
metal‐free
electrodes
for
anion
exchange
membrane
water
electrolysis
(AEM‐WE)
operating
at
high
current
densities
are
critical
sustainable
hydrogen
production.
However,
the
massive
amount
of
bubbles
resulted
in
insufficient
mass
transfer
and
unevenly
distributed
local
stress,
which
poses
a
major
challenge
designing
an
efficient
robust
evolution
catalyst.
Herein,
facile
chemical
corrosion
method
is
developed
to
synthesize
interlayer‐anchored
NiMo/MoO
2
catalyst
on
nickel
foam
(NF)
substrate
(NiMo/Int/NF)
with
activity
(overpotential
80.2
±
3.53
mV)
durability
(stable
5000
h)
1000
mA
cm
−2
1
m
KOH.
The
interlayer
tightly
anchors
catalytic
layer
substrate,
providing
compressive
strength
strong
adhesion
mitigate
bubble
shock
density.
In
situ
Raman
X‐ray
diffraction
analyses
reveal
that
heterostructural
can
accelerate
reaction
increased
pH
component
utilization.
Using
NiMo/Int/NF
as
cathode,
assembled
noble
AEM‐WE
device
exhibits
low
cell
voltage
1.78
V
(significantly
lower
than
Pt/C‐catalyzed
(1.94
V))
while
also
showing
excellent
stability
3000
h.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 7, 2025
Abstract
Seawater
electrolysis
is
pivotal
for
sustainable
hydrogen
production,
yet
chloride‐induced
catalyst
corrosion
severely
hinders
its
efficiency.
Here,
a
(Mo,
Co)P
x
electrocatalyst
via
two‐step
hydrothermal‐phosphorization
strategy
engineered,
enabling
in
situ
formation
of
dynamic
dual‐anion
(MoO
4
2
⁻/PO
3
⁻)
Cl
−
‐rejection
interface.
This
tailored
interface
effectively
blocks
adsorption
while
preserving
hydroxyl
accessibility,
significantly
enhancing
resistance
alkaline
seawater.
The
optimized
delivers
exceptional
oxygen
evolution
reaction
performance
seawater
electrolysis,
achieving
ultralow
overpotentials
213
and
360
mV
to
reach
current
densities
10
1000
mA
cm
−2
,
respectively.
Remarkably,
the
with
an
situ‐generated
rejection
layer
demonstrates
durability,
exhibiting
only
20mV
degradation
during
480‐h
stability
test
under
high‐current
conditions.
In
Raman
spectroscopy,
attenuated
total
reflectance
surface‐enhanced
infrared
absorption
density
functional
theory
calculations
demonstrate
that
not
enhances
but
also
promotes
rapid
surface
reconstruction
Co
species
interfacial
water
adsorption,
thereby
suppressing
competitive
chlorine
reactions.
work
provides
rational
designing
durable
electrocatalysts
situ‐engineered
anion‐rejection
interfaces,
advancing
efficient
electrolysis.
