ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
6(12), P. 5248 - 5255
Published: Oct. 31, 2024
Seawater
electrolysis
shows
potential
for
sustainable
hydrogen
production
but
faces
challenges
from
the
high
concentration
of
Cl–,
which
leads
to
corrosion
and
performance
degradation.
In
this
study,
we
prepared
a
NiFe
layered
double
hydroxide
(NiFe
LDH)
nanoarray
modified
with
poly(3-thiophenemalonic
acid)
(PTPA)
on
Ni
foam
LDH@PTPA/NF)
enhance
alkaline
seawater
oxidation
(ASO).
PTPA
serves
as
conductive
protective
layer,
improving
electrical
conductivity
repelling
Cl–
increase
stability.
The
electrode
demonstrated
stable
operation
at
1000
mA
cm–2
low
overpotential
600
h,
generating
minimal
chlorine.
situ
Raman
spectroscopy
confirmed
that
facilitates
active
site
formation
provides
protection,
while
inductively
coupled
plasma-optical
emission
spectrometry
analysis
indicated
reduced
Fe
leaching.
This
study
highlights
polymers
ASO
durability.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: July 23, 2024
Abstract
It
is
vital
to
explore
effective
ways
for
prolonging
electrode
lifespans
under
harsh
electrolysis
conditions,
such
as
high
current
densities,
acid
environment,
and
impure
water
source.
Here
we
report
alternating
approaches
that
realize
promptly
regularly
repair/maintenance
concurrent
bubble
evolution.
Electrode
are
improved
by
co-action
of
Fe
group
elemental
ions
alkali
metal
cations,
especially
a
unique
Co
2+
-Na
+
combo.
A
commercial
Ni
foam
sustains
ampere-level
densities
alternatingly
during
continuous
93.8
h
in
an
acidic
solution,
whereas
completely
dissolved
~2
conventional
conditions.
The
work
not
only
explores
electrolysis-based
system,
cation-based
catalytic
systems,
electrodeposition
techniques,
beyond,
but
demonstrates
the
possibility
prolonged
repeated
deposition-dissolution
processes.
With
enough
adjustable
experimental
variables,
upper
improvement
limit
lifespan
would
be
high.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(47)
Published: Aug. 29, 2024
Abstract
Direct
electrochemical
seawater
splitting
is
a
renewable,
scalable,
and
potentially
economic
approach
for
green
hydrogen
production
in
environments
where
ultra‐pure
water
not
readily
available.
However,
issues
related
to
low
durability
caused
by
complex
ions
pose
great
challenges
its
industrialization.
In
this
review,
mechanistic
analysis
of
electrolytic
discussed.
We
critically
analyze
the
development
electrolysis
identify
at
both
anode
cathode.
Particular
emphasis
given
elucidating
rational
strategies
designing
electrocatalysts/electrodes/interfaces
with
long
lifetimes
realistic
including
inducing
passivating
anion
layers,
preferential
OH
−
adsorption,
employing
anti‐corrosion
materials,
fabricating
protective
immobilizing
Cl
on
surface
electrocatalysts,
tailoring
adsorption
sites,
inhibition
binding
Mg
2+
Ca
,
hydroxide
precipitation
adherence,
co‐electrosynthesis
nano‐sized
hydroxides.
Synthesis
methods
electrocatalysts/electrodes
innovations
electrolyzer
are
also
Furthermore,
prospects
developing
technologies
clean
generation
summarized.
found
that
researchers
have
rethought
role
ions,
as
well
more
attention
cathodic
reaction
electrolyzers,
which
conducive
accelerate
commercialization
electrolysis.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 3, 2025
Coastal/offshore
renewable
energy
sources
combined
with
seawater
splitting
offer
an
attractive
means
for
large-scale
H2
electrosynthesis
in
the
future.
However,
designing
anodes
proves
rather
challenging,
as
surface
chlorine
chemistry
must
be
blocked,
particularly
at
high
current
densities
(J).
Additionally,
waste
increased
salinity
produced
after
long-term
electrolysis
would
impair
whole
process
sustainability.
Here,
we
convert
to
O2
selectively,
on
hydroxides,
by
building
phytate-based
expanded
negative
electrostatic
networks
(ENENs)
electrostatically
repulsive
capacities
and
higher
charge
coverage
ranges
than
those
of
common
inorganic
polyatomic
anions.
With
ENENs,
even
typically
unstable
CoFe
hydroxides
perform
nicely
toward
alkaline
oxidation
activities
>1
A
cm–2.
ENENs
exhibit
prolonged
lifespans
1000
h
J
1
cm–2
900
2
thus
rival
best
anodes.
Direct
introduction
trace
phytates
weakens
corrosion
tendency
conventional
well,
extending
life
∼28
times
wide
range
materials
all
obtain
lifetimes
presence
validating
universal
applicability.
Mechanisms
are
studied
using
theoretical
computations
under
working
conditions
ex
situ/in
situ
characterizations.
We
demonstrate
a
potentially
viable
way
sustainably
reutilize
high-salinity
wastewater,
which
is
long-standing
but
neglected
issue.
Series-connected
devices
good
resistance
low
temperature
operation
more
eco-friendly
organic
electrolyte-based
storage
devices.
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 18, 2025
Abstract
The
seawater
splitting
for
green
hydrogen
production
is
emerging
as
a
key
research
focus
sustainable
energy.
Nevertheless,
the
inherent
complexity
of
seawater,
with
its
diverse
ion
composition
–
especially
chloride
ions,
calcium
and
magnesium
ions
poses
significant
challenges
in
catalyst
design.
Designing
highly
active
electrocatalysts
that
can
resist
corrosion
during
still
challenge.
This
article
presents
an
overview
fundamental
mechanisms
explores
issues
encountered
at
both
cathode
anode
electrode.
then
shifts
to
chlorine
anode,
examining
recent
advances
preventing
strategies.
Notably,
these
design
strategies,
such
anionic
passivation
layers,
corrosion‐resistant
metal
doping,
physical
barrier
situ
phase
transition‐driven
desalination,
decoupled
splitting,
are
comprehensively
investigated,
all
which
aim
enhance
catalytic
stability
splitting.
review
concludes
outlook
on
practical
applications
producing
through
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 4, 2025
Abstract
Membrane‐assisted
direct
seawater
splitting
(DSS)
technologies
are
actively
studied
as
a
promising
route
to
produce
green
hydrogen
(H
2
),
whereas
the
indispensable
use
of
supporting
electrolytes
that
help
extract
water
and
provide
electrochemically‐accelerated
reaction
media
results
in
severe
energy
penalty,
consuming
up
12.5
%
input
when
using
typical
KOH
electrolyte.
We
bypass
this
issue
by
designing
zero‐gap
electrolyzer
configuration
based
on
integration
cation
exchange
membrane
bipolar
assemblies,
which
protects
stable
DSS
operation
against
precipitates
corrosion
absence
additional
electrolytes.
The
heterolytic
dissociation
function
situ
creates
an
asymmetric
acidic‐alkaline
environment,
kinetically
facilitating
H
O
evolution
reactions.
When
working
natural
without
any
chemical
inputs,
sustains
nearly
100
Faradaic
efficiency
toward
for
120
h
at
current
density
mA
cm
−2
.
With
high‐integrity
merit,
our
can
be
facilely
scaled
into
practical
cell
stacks
with
significantly
increased
active
area
prospects
volume/space‐sensitive
application
scenarios.
This
concept
opens
underexplored
design
space
energy‐saving
production
from
low‐grade
saline
sources,
being
complementary
to,
potentially
competitive
pre‐purification
Schemes.
