Processes,
Journal Year:
2024,
Volume and Issue:
12(9), P. 1983 - 1983
Published: Sept. 14, 2024
In
the
process
of
promoting
commercialization
proton
exchange
membrane
fuel
cells,
long-term
durability
cell
has
become
a
key
consideration.
While
existing
tests
are
critical
for
assessing
performance,
they
often
time-consuming
and
do
not
quickly
reflect
impact
actual
operating
conditions
on
cell.
this
study,
improved
testing
protocols
were
utilized
to
solve
problem,
which
is
designed
shorten
cycle
evaluate
degradation
performance
under
real
more
efficiently.
Accelerated
analysis
evaluating
MEA
lifetime
decay
was
carried
out
through
two
protocols—open
circuit
voltage
(OCV)-based
accelerated
(ADT)
relative
humidity
(RH)
cycling-based
ADT.
OCV-based
ADT
revealed
that
owes
combined
mechanical
chemical
process.
RH
shows
comes
from
mainly
situ
fluoride
release
rate
technology
employed
elucidate
during
It
found
suffered
serious
damage
The
loss
F−
after
test
up
3.50
×
10−4
mol/L,
4.3
times
addition,
had
significant
effect
catalyst
layer,
electrochemically
active
surface
area
decreased
by
48.6%
at
end
Moreover,
it
observed
agglomeration
catalysts
obvious
than
transmission
electron
microscopy.
worth
noting
both
have
no
influence
gas
diffusion
contact
angle
layers
does
change
significantly.
These
findings
contribute
understanding
behavior
cells
different
working
conditions,
also
provide
scientific
basis
developing
effective
protocols.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 26, 2025
Improving
the
utilization
of
iridium
in
proton
exchange
membrane
(PEM)
water
electrolyzer
is
critical
reducing
their
cost
for
future
development.
Titanium
dioxide
(TiO2)
has
notable
electrochemical
stability
at
high
operating
potential
and
been
developed
as
a
promising
support
iridium-based
OER
nano-catalysts.
However,
limited
by
insufficient
conductivity,
content
on
TiO2
catalysts
normally
above
50
wt.%.
Herein,
provided
conductivity-enhanced
low-iridium-loading
PEMWE,
successfully
to
28
wt.%
regulation
electron
transport
pathway.
A
new
ionomer
distribution
strategy
then
applied
Ir@Pt@TiO2
catalyst
layer
release
sites
regulate
local
mass
pathways
anode.
This
work
reveals
that
catalyst-ionomer
interface
played
an
important
role
activity
anode
PEMWE.
Building
thin
uniform
supports
with
exposure
can
result
continuous
pathways,
promoting
bubble
escape,
exposing
more
effective
active
during
reaction
situations.
provides
novel
perspective
research
PEMWEs.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 8, 2025
Abstract
For
oxygen
evolution
reaction
(OER)
in
proton
exchange
membrane
water
electrolyzer
(PEMWE),
iridium
(Ir)
remains
the
primary
active
component
catalysts,
but
its
high
cost
and
low
utilization
efficiency
pose
significant
barriers
to
large‐scale
deployment.
Designing
high‐performance
supported
Ir‐based
catalysts
is
of
urgent
necessity.
By
constructing
a
hierarchical
WO
3
@TiN
supporting
material,
an
Ir/WO
catalyst
designed
with
superior
OER
activity
stability.
The
optimized
exhibits
mass
(MA)
up
920.93
mA
mg
Ir
−1
,
over
20
times
that
commercial
IrO
2
.
Experimental
evidences
confirm
facilitated
vacancies
induced
by
diffusion
Ti
at
interfaces.
electrode
assembly
(MEA)
fabricated
anode
(0.3
cm
−2
)
can
operate
1.0
A
merely
1.60
V
(70
°C),
durable
operation
for
200
h.
Theoretical
calculations
reveal
doping
atoms
lattice
promotes
formation
vacancy,
which
optimize
surface
electronic
structure
on
lower
energy
barrier
*OOH
formation,
leading
boosted
activity.
This
work
not
only
introduces
new
strategies
support
design
also
shows
their
great
potential
practical
applications.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(20), P. 15764 - 15776
Published: Oct. 9, 2024
IrOx
of
the
amorphous
phase
has
long
been
recognized
to
exhibit
higher
catalytic
activity
than
crystalline
analogues
toward
oxygen
evolution
reaction
(OER)
but
always
at
expense
reduced
stability.
Here,
we
report
an
ultrathin
Ir
surface
with
high-density
grain
boundaries
(GBs),
which
transforms
into
locally
stabilized
by
forming
Ir/IrOx
interface
under
OER
conditions.
The
catalyst
displays
a
low
overpotential
263
mV
10
mA
cm–2
and
mass
(5.8
A
mgIr–1
1.53
V)
over
90-fold
that
commercial
IrO2,
along
long-term
stability
for
350
h.
enhancement
arises
from
stronger
binding
strength
*OOH
on
GBs
relative
region,
thus
breaking
scaling
relationship
between
*OH
reducing
energy
barrier
potential
determining
step
OER.
Proton
exchange
membrane
water
electrolysis
using
this
achieves
2.7
2
V
cell
voltage
operates
stably
1
200
stabilization
may
accelerate
development
more
active
robust
acidic
electrocatalysts.
ACS Central Science,
Journal Year:
2024,
Volume and Issue:
10(11), P. 2006 - 2015
Published: Nov. 13, 2024
Proton
exchange
membrane
(PEM)
water
electrolyzers
stand
as
one
of
the
foremost
promising
avenues
for
acidic
splitting
and
green
hydrogen
production,
yet
this
electrolyzer
encounters
significant
challenges.
The
primary
culprit
lies
in
not
only
requirements
substantial
platinum-group-metal
(PGM)-based
electrocatalysts
(e.g.,
IrOx)
at
anode
where
sluggish
oxygen
evolution
reaction
(OER)
takes
place,
but
also
harsh
high
overpotential
environments
leading
to
severe
performance
degradation.
key
points
obtaining
accurate
stability/durability
information
on
OER
catalysts
have
been
well
agreed
upon,
contrast
reduction
fields.
In
regard,
we
herein
reviewed
discussed
pivotal
experimental
variables
involved
testing
(including
limited
electrolyte,
impurity,
catalyst
loading,
two/three-electrode
vs
membrane-electrode-assembly),
while
test
protocols
are
revisited
summarized.
This
outlook
is
aimed
highlighting
reasonable
effective
accelerated
degradation
procedures
unravel
instability
issues
promote
research
development
a
PEM
electrolyzer.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(30), P. 39408 - 39417
Published: July 22, 2024
Reference
electrode
is
the
foundation
of
electrochemical
study;
thus,
most
materials
are
tested
in
a
three-electrode
mode
to
acquire
potential-dependent
kinetics.
However,
it
difficult
directly
use
conventional
reference
electrodes
detect
potential
information
solid
electrolyte
devices
due
their
compact
assembly
structure.
Therefore,
kinetic
study
an
device
faces
challenges
precise
identification
specific
problems
originating
from
anode
or
cathode.
Here,
focusing
on
proton
exchange
membrane
water
electrolysis,
we
design
reversible
hydrogen
(SE-RHE),
which
can
be
used
for
diagnosis
under
various
operating
conditions.
Compared
reported
literature,
mainly
based
liquid
electrolyte,
SE-RHE
highly
sensitive
and
compatible,
as
well
easy
assemble.
The
deviation
less
than
±0.5
mV,
cell
voltage
derived
reproduces
value
that
was
measured
with
0.2%.
developed
this
work
enables
rather
entire
cell.
For
instance,
interesting
observation
cathode
shows
distinct
stability
stable
fluctuating
operations.
Differing
high
operation,
degrades
significantly
Processes,
Journal Year:
2024,
Volume and Issue:
12(9), P. 1983 - 1983
Published: Sept. 14, 2024
In
the
process
of
promoting
commercialization
proton
exchange
membrane
fuel
cells,
long-term
durability
cell
has
become
a
key
consideration.
While
existing
tests
are
critical
for
assessing
performance,
they
often
time-consuming
and
do
not
quickly
reflect
impact
actual
operating
conditions
on
cell.
this
study,
improved
testing
protocols
were
utilized
to
solve
problem,
which
is
designed
shorten
cycle
evaluate
degradation
performance
under
real
more
efficiently.
Accelerated
analysis
evaluating
MEA
lifetime
decay
was
carried
out
through
two
protocols—open
circuit
voltage
(OCV)-based
accelerated
(ADT)
relative
humidity
(RH)
cycling-based
ADT.
OCV-based
ADT
revealed
that
owes
combined
mechanical
chemical
process.
RH
shows
comes
from
mainly
situ
fluoride
release
rate
technology
employed
elucidate
during
It
found
suffered
serious
damage
The
loss
F−
after
test
up
3.50
×
10−4
mol/L,
4.3
times
addition,
had
significant
effect
catalyst
layer,
electrochemically
active
surface
area
decreased
by
48.6%
at
end
Moreover,
it
observed
agglomeration
catalysts
obvious
than
transmission
electron
microscopy.
worth
noting
both
have
no
influence
gas
diffusion
contact
angle
layers
does
change
significantly.
These
findings
contribute
understanding
behavior
cells
different
working
conditions,
also
provide
scientific
basis
developing
effective
protocols.
