Advanced Materials,
Год журнала:
2024,
Номер
36(28)
Опубликована: Апрель 25, 2024
Abstract
The
high
cost
of
proton
exchange
membrane
water
electrolysis
(PEMWE)
originates
from
the
usage
precious
materials,
insufficient
efficiency,
and
lifetime.
In
this
work,
an
important
degradation
mechanism
PEMWE
caused
by
dynamics
ionomers
over
time
in
anode
catalyst
layer
(ACL),
which
is
a
purely
mechanical
microstructure,
identified.
Contrary
to
conventional
understanding
that
microstructure
ACL
static,
micropores
are
inclined
be
occupied
due
localized
swelling/creep/migration,
especially
near
ACL/PTL
(porous
transport
layer)
interface,
where
they
form
channels
reactant/product
couples.
Consequently,
with
increased
at
PTL/ACL
interface
exhibit
rapid
continuous
degradation.
addition,
close
correlation
between
ink
discovered.
Specifically,
if
more
migrate
top
ink,
accumulate
ACL/PEM
leaving
fewer
interface.
Therefore,
ionomer
distribution
successfully
optimized,
exhibits
reduced
enriches
reducing
decay
rate
factor
three
when
operated
2.0
A
cm
−2
80
°C.
findings
provide
general
way
achieve
low‐cost
hydrogen
production.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(45), С. 31253 - 31261
Опубликована: Янв. 1, 2024
The
widespread
utilization
of
noble
metal-based
catalysts
for
the
oxygen
evolution
reaction
(OER)
is
hindered
by
their
rarity
and
substantial
expense,
posing
significant
challenges
large-scale
applications.
Advanced Materials,
Год журнала:
2024,
Номер
36(28)
Опубликована: Апрель 25, 2024
Abstract
The
high
cost
of
proton
exchange
membrane
water
electrolysis
(PEMWE)
originates
from
the
usage
precious
materials,
insufficient
efficiency,
and
lifetime.
In
this
work,
an
important
degradation
mechanism
PEMWE
caused
by
dynamics
ionomers
over
time
in
anode
catalyst
layer
(ACL),
which
is
a
purely
mechanical
microstructure,
identified.
Contrary
to
conventional
understanding
that
microstructure
ACL
static,
micropores
are
inclined
be
occupied
due
localized
swelling/creep/migration,
especially
near
ACL/PTL
(porous
transport
layer)
interface,
where
they
form
channels
reactant/product
couples.
Consequently,
with
increased
at
PTL/ACL
interface
exhibit
rapid
continuous
degradation.
addition,
close
correlation
between
ink
discovered.
Specifically,
if
more
migrate
top
ink,
accumulate
ACL/PEM
leaving
fewer
interface.
Therefore,
ionomer
distribution
successfully
optimized,
exhibits
reduced
enriches
reducing
decay
rate
factor
three
when
operated
2.0
A
cm
−2
80
°C.
findings
provide
general
way
achieve
low‐cost
hydrogen
production.
