ChemElectroChem,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 26, 2025
Engineering
catalyst
layer
structure
is
of
significant
importance
to
improve
the
performance
and
durability
proton
exchange
membrane
water
electrolysis
(PEMWE),
yet
rare
efficient
design
strategies
has
been
reported.
This
work
develops
an
in
situ
pore‐making
approach
construct
cross‐linked
porous
layer,
which
significantly
improves
active
site
utilization
compared
conventional
(CCL).
The
electrochemical
activity
area
electrode
assemblies
(MEA)
(52.22
cm
2
mg
Ir
−1
)
2.10
times
higher
than
that
CCL‐MEA
(24.90
),
indicates
more
sites
are
exposed
during
process,
leading
efficiency
electrocatalyst.
As
a
result,
exhibits
high
current
density
3.8
A
−2
at
1.9
V,
exceeding
U.S.
Department
Energy
2025
target
(3
@1.9
V),
shows
superior
with
no
degradation
after
1600
h
operation
constant
load
.
Scanning
electron
microscope
analysis
confirms
structural
integrity
while
cracks
formed
CCL
testing.
These
results
highlight
benefits
improving
mass
transport,
stability,
overall
PEMWE
applications.
ChemElectroChem,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 26, 2025
Engineering
catalyst
layer
structure
is
of
significant
importance
to
improve
the
performance
and
durability
proton
exchange
membrane
water
electrolysis
(PEMWE),
yet
rare
efficient
design
strategies
has
been
reported.
This
work
develops
an
in
situ
pore‐making
approach
construct
cross‐linked
porous
layer,
which
significantly
improves
active
site
utilization
compared
conventional
(CCL).
The
electrochemical
activity
area
electrode
assemblies
(MEA)
(52.22
cm
2
mg
Ir
−1
)
2.10
times
higher
than
that
CCL‐MEA
(24.90
),
indicates
more
sites
are
exposed
during
process,
leading
efficiency
electrocatalyst.
As
a
result,
exhibits
high
current
density
3.8
A
−2
at
1.9
V,
exceeding
U.S.
Department
Energy
2025
target
(3
@1.9
V),
shows
superior
with
no
degradation
after
1600
h
operation
constant
load
.
Scanning
electron
microscope
analysis
confirms
structural
integrity
while
cracks
formed
CCL
testing.
These
results
highlight
benefits
improving
mass
transport,
stability,
overall
PEMWE
applications.