ACS Energy Letters,
Journal Year:
2024,
Volume and Issue:
unknown, P. 273 - 282
Published: Dec. 17, 2024
Electrochemical
water
splitting
is
a
key
technique
for
sustainable
hydrogen
production,
but
its
efficiency
often
compromised
by
bubble
formation
during
electrolysis.
In
this
work,
we
introduce
new
electrolyzer
design
that
strategically
optimizes
gas
and
liquid
flow
distributions
to
facilitate
rapid
removal,
thereby
enhancing
the
electrochemical
process.
By
incorporating
hydrophobic
gas-venting
layer,
our
significantly
shortens
transfer
path
reduces
level
of
accumulation.
This
advancement
results
in
voltage
reduction
more
than
50
mV
decrease
performance
fluctuations
exceeding
50%
compared
with
traditional
systems.
Through
detailed
optical
analyses
finite
element
simulations,
further
elucidate
effects
gas–liquid
transport,
enabling
high-performance
electrolysis
volumetric
current
density
333
mA
cm–3
at
1.8
V.
These
findings
underscore
potential
local
field
management
advancing
other
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 4, 2025
Abstract
Proton
exchange
membrane
water
electrolysis
(PEMWE)
represents
a
promising
technology
for
renewable
hydrogen
production.
However,
the
large‐scale
commercialization
of
PEMWE
faces
challenges
due
to
need
acid
oxygen
evolution
reaction
(OER)
catalysts
with
long‐term
stability
and
corrosion‐resistant
electrode
assemblies
(MEA).
This
review
thoroughly
examines
deactivation
mechanisms
acidic
OER
crucial
factors
affecting
assembly
instability
in
complex
environments,
including
catalyst
degradation,
dynamic
behavior
at
MEA
triple‐phase
boundary,
equipment
failures.
Targeted
solutions
are
proposed,
improvements,
optimized
designs,
operational
strategies.
Finally,
highlights
perspectives
on
strict
activity/stability
evaluation
standards,
situ/operando
characteristics,
practical
electrolyzer
optimization.
These
insights
emphasize
interrelationship
between
catalysts,
MEAs,
activity,
stability,
offering
new
guidance
accelerating
systems.
RSC Sustainability,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
study
presents
a
novel
room-temperature,
two-step
process
for
separating
catalyst-coated
membranes
(CCMs)
used
in
fuel
cells
and
water
electrolysers.
Small,
Journal Year:
2024,
Volume and Issue:
20(43)
Published: June 28, 2024
As
the
anode
reaction
of
proton
exchange
membrane
water
electrolysis
(PEMWE),
acidic
oxygen
evolution
(OER)
is
one
main
obstacles
to
practical
application
PEMWE
due
its
sluggish
four-electron
transfer
process.
The
development
high-performance
OER
electrocatalysts
has
become
key
improving
kinetics.
To
date,
although
various
excellent
have
been
widely
researched,
Ir-based
nanomaterials
are
still
state-of-the-art
electrocatalysts.
Hence,
a
comprehensive
and
in-depth
understanding
mechanism
crucial
for
precise
optimization
catalytic
performance.
In
this
review,
origin
nature
conventional
adsorbate
(AEM)
derived
volcanic
relationship
on
processes
summarized
some
strategies
based
AEM
introduced.
further
investigate
strategy
electrocatalysts,
several
unconventional
mechanisms
including
dual-site
lattice
mediated
mechanism,
their
applications
introduced
in
detail.
Thereafter,
active
species
at
classified
into
surface
Ir
O
species.
Finally,
future
direction
prospect
put
forward.
