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.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Июль 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.
EcoEnergy,
Год журнала:
2024,
Номер
2(1), С. 114 - 140
Опубликована: Март 1, 2024
Abstract
Developing
efficient
electrocatalysts
for
water
electrolysis
is
critical
sustainable
hydrogen
energy
development.
For
enhancing
the
catalytic
performance
of
metal
catalysts,
dual
doping
has
attracted
enormous
interest
its
high
effectiveness
and
facile
realization.
Dual
effective
tuning
electronic
properties,
electrical
conductivity,
populating
active
sites,
improving
stability
catalysts.
In
this
review,
recent
developments
in
cation–cation,
cation–anion,
anion–anion
dual‐doped
catalysts
splitting
are
comprehensively
summarized
discussed.
An
emphasis
put
on
illustrating
how
regulates
external
internal
properties
boosts
Additionally,
perspectives
pointed
out
to
guide
future
research
engineering
high‐performance
heteroatom‐doped
electrocatalysts.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Ноя. 12, 2024
Ruthenium
(Ru)
is
widely
recognized
as
a
low-cost
alternative
to
iridium
anode
electrocatalyst
in
proton-exchange
membrane
water
electrolyzers
(PEMWE).
However,
the
reported
Ru-based
catalysts
usually
only
operate
within
tens
of
hours
PEMWE
because
their
intrinsically
high
reactivity
lattice
oxygen
that
leads
irrepressible
Ru
leaching
and
structural
collapse.
Herein,
we
report
design
concept
by
employing
large-sized
acid-resistant
lead
(Pb)
second
element
induce
pinning
effect
for
effectively
narrowing
moving
channels
atoms,
thereby
lowering
oxides.
The
Pb-RuO
ACS Materials Letters,
Год журнала:
2024,
Номер
6(5), С. 1678 - 1685
Опубликована: Март 27, 2024
The
slow
kinetics
of
the
alkaline
hydrogen
evolution
reaction
(HER)
and
oxidation
(HOR)
must
be
upgraded
to
achieve
a
renewable
cycle.
Transition
metal
phosphides
transition
carbides
exhibit
excellent
activity
toward
diverse
catalytic
reactions.
synthesis
MoP-Mo2C
heterogeneous
nanoparticles
coated
with
porous
carbon
network
(MoP-Mo2C/C)
via
one-step
heat
treatment
was
reported,
which
exhibited
low
overpotential
at
10
mA
cm–2
(102.1
mV),
Tafel
slope
(53.1
mV
dec–1),
stability
(96
h)
for
HER.
In
addition,
MoP-Mo2C/C
performance
HOR,
an
exchange
current
density
1.40
cm–2.
Density
functional
theory
simulations
indicated
that
electronic
structure
optimized,
its
Gibbs
free
energy
approximately
zero,
is
origin
fast
kinetics.
This
work
provides
promising
strategy
designing
high-performance
bifunctional
electrocatalysts.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(46), С. 32049 - 32058
Опубликована: Ноя. 12, 2024
The
advancement
of
acid-stable
oxygen
evolution
reaction
(OER)
electrocatalysts
is
crucial
for
efficient
hydrogen
production
through
proton
exchange
membrane
(PEM)
water
electrolysis.
Unfortunately,
the
activity
constrained
by
a
linear
scaling
relationship
in
adsorbed
mechanism,
while
lattice-oxygen-mediated
mechanism
undermines
stability.
Here,
we
propose
heterogeneous
dual-site
oxide
pathway
(OPM)
that
avoids
these
limitations
direct
dioxygen
radical
coupling.
A
combination
Lewis
acid
(Cr)
and
Ru
to
form
solid
solution
oxides
(Cr
ACS Energy Letters,
Год журнала:
2024,
Номер
9(6), С. 2922 - 2935
Опубликована: Май 25, 2024
Large-scale
adoption
of
proton
exchange
membrane
water
electrolyzers
(PEMWEs)
is
hindered
by
limited
durability
costly
anodic
iridium
(Ir)
electrocatalysts.
Therefore,
it
crucial
to
establish
a
strategy
that
can
decrease
the
Ir
loadings
without
compromising
performance
and
stability
for
extended
applications
PEMWEs.
Employing
high-surface-area
conductive
corrosion-resistant
catalyst
support
enhance
dispersion
low
loading,
thereby
maximizing
active
site
density
stabilizing
under
harsh
operating
conditions.
In
this
review,
we
explore
role
oxygen
evolution
electrocatalysts
summarizing
distinct
properties
various
supports
such
as
composition,
surface
area,
conductivity,
anticorrosion
strong
catalyst–support
interactions.
Finally,
articulate
our
perspectives
on
future
research
directions,
emphasizing
durability,
synergy
between
electrocatalyst
scale-up
fabrication
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 13, 2024
The
development
of
a
highly
active
and
stable
oxygen
evolution
reaction
(OER)
electrocatalyst
is
desirable
for
sustainable
efficient
hydrogen
production
via
proton
exchange
membrane
water
electrolysis
(PEMWE)
powered
by
renewable
electricity
yet
challenging.
Herein,
we
report
robust
Pt/Ru-codoped
spinel
cobalt
oxide
(PtRu-Co
