Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 28, 2024
Abstract
Developing
cost‐effective,
high‐efficiency,
and
stable
electrocatalysts
for
the
hydrogen
evolution
reaction
(HER)
in
alkaline
electrolytes
is
of
critical
importance
realizing
renewable
technologies.
However,
sluggish
HER
kinetics
unsatisfied
stability
remain
challenges
their
practical
applications.
Herein,
a
hierarchically
porous
phosphorized
Pt‐Ni
nanohexapod/N‐doped
graphene
aerogel
(P‐PtNiNH/NGA)
constructed
by
an
oxidation‐phosphorization‐controlled
reconfiguration
strategy
presented.
It
enables
fast
water
dissociation
abundant
supply
ions,
strong
electron
interaction
optimal
intermediate
adsorption,
excellent
anchoring
effect
NGA
to
avoid
aggregation
Ostwald
ripening
PtNiNHs,
thus
exhibiting
superior
activity
exceptional
toward
HER.
The
P‐Pt
1
Ni
2
NH/NGA
exhibits
ultralow
overpotential
15
mV
at
current
density
10
mA
cm
−2
,
low
Tafel
slope
37
dec
−1
long‐term
stability,
which
are
commercial
Pt/C.
Moreover,
shows
high
mass
13.4
µg
large
TOF
value
13.5
s
100
mV,
8.8
times
9.0
higher
than
Pt/C
(under
same
Pt
loading
≈9.1
).
This
work
inspiration
catalyst
design
obtain
ideal
performance.
Electrolysis
of
seawater
for
hydrogen
(H2)
production
to
harvest
clean
energy
is
an
appealing
approach.
In
this
context,
there
urgent
need
catalysts
with
high
activity
and
durability.
RuO2
electrocatalysts
have
shown
efficient
in
the
oxygen
evolution
reactions
(HER
OER),
but
they
still
suffer
from
poor
stability.
Herein,
surface
S-doped
nanostructured
(S-RuO2)
rationally
fabricated
overall
splitting.
Doping
S
enhances
(overpotentials
25
mV
HER
243
long-term
durability
(1000
h
at
100
mA
cm–2),
achieves
nearly
100%
Faraday
efficiency
(FE).
Moreover,
S-RuO2-based
anion
exchange
membrane
electrolyzer
requires
2.01
V
reach
1.0
A
cm–2
under
demanding
industrial
conditions.
Experimental
analysis
theoretical
calculations
indicate
that
introduction
could
lower
valence
state
Ru,
thereby
conferring
enhanced
Furthermore,
S-RuO2
electrocatalyst
highly
protected
by
surface,
which
repels
Cl–
alkaline
seawater.
This
investigation
presents
a
feasible
strategy
designing
RuO2-based
splitting
both
performance
good
resistance
anodic
corrosion.
Abstract
Water
electrolysis
has
been
deemed
as
a
simple,
safe,
and
clean
way
to
realize
sustainable
hydrogen
production.
However,
efficacious
water
for
production
is
highly
dependent
on
efficient
stable
electrocatalysts.
Herein,
we
report
nanorod/nanotube
array
composite
electrocatalyst
toward
evolution
reaction
(HER)
in
both
basic
acidic
electrolytes.
For
the
composite,
One-dimensional
RuO2
nanorods
(NRs)
were
grown
top
of
WO3
nanotube
arrays
(NTA)
through
facile
solution
impregnation
method
followed
by
high-temperature
calcination.
The
obtained
NRs/WO3
NTA
demonstrates
superb
electrocatalytic
activity
HER
medias.
To
achieve
current
density
10
mA
cm−
2,
required
overpotentials
are
33
mV
1
M
KOH
62
0.5
H2SO4,
respectively.
Furthermore,
also
shows
an
excellent
long-term
electrochemical
stability
alkaline
superior
most
reported
RuO2-based
Ru-based
electrocatalysts,
even
comparable
state-of-the-art
Pt/C
catalyst.
could
be
attributed
structural
merits
including
large
surface
area
with
abundant
catalytically
active
sites,
specific
charge
transport
channel
ensuring
enhanced
kinetics
favorable
bubble
formation
release.
present
work
sheds
new
light
designing
novel
one-dimensional
structures
generation.
Simultaneously,
designed
structure
this
expected
applied
other
energy
conversion
devices.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 2, 2025
Abstract
Single‐atom
catalysts
(SACs)
show
great
promise
for
electrocatalytic
water
splitting
due
to
their
exceptional
metal
atom
utilization
efficiency.
Herein,
it
is
demonstrated
that
Ru
single
atoms
(SAs)
anchored
on
Co
3
O
4
nanorod
arrays
(Ru
x
‐Co
,
where
the
loading
in
weight
percent)
afford
outstanding
performance
and
durability
oxygen
evolution
reaction
(OER),
hydrogen
(HER),
overall
across
a
wide
pH
range
(0.3–14).
8%
achieves
10
mA
cm⁻
2
at
overpotentials
of
only
214,
286,
138
mV
OER,
13,
72,
59
HER,
1
m
KOH,
0.1
PBS,
0.5
H
SO
respectively,
outperforming
benchmark
RuO
Pt/C
catalysts.
When
utilized
as
anode
cathode
an
anion
exchange
membrane
electrolyzer
(AEMWE),
cell
voltage
2.06
V
required
achieve
A
.
Chronopotentiometry
verified
possesses
excellent
stability
during
both
OER
HER
100
acidic,
neutral,
alkaline
media.
Density
functional
theory
(DFT)
calculations
reveal
abundant
Ru‐O‐Co
interfaces
shift
d‐band
center
from
−1.72
eV
(for
cluster/Co
)
−1.58
SA/Co
),
creating
more
energetically
favorable
pathways
HER.
Advanced Sustainable Systems,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 10, 2025
Abstract
Hydrogen
production
by
electrochemical
water
splitting
is
considered
to
be
a
key
strategic
energy
technology,
and
proton
exchange
membrane
electrolyzers
(PEMWEs)
anion
(AEMWEs)
are
ideal
technologies
for
green
hydrogen
in
recent
years.
However,
PEMWEs
AEMWEs
lack
low‐cost
high‐performance
acidic
oxygen
evolution
reaction
(OER)
alkaline
(HER)
electrocatalysts
respectively,
limiting
their
large‐scale
development.
Recently,
ruthenium
(Ru)‐based
have
received
lot
of
attention
because
activity
better
than
that
commercial
catalysts
price
more
affordable,
showing
great
potential
OER
HER.
there
still
obstacles
Ru‐based
practical
applications
industrial
electrolyzers,
regulatory
strategies
need
developed
further
optimize
its
performance.
Herein,
comprehensive
review
presented
concerning
it.
First,
fundamental
principles
focus
the
basic
content
application
discussed.
Then,
summarized,
providing
detailed
analysis
elucidate
mechanisms,
properties,
electrolyzers.
Finally,
outlooks
prospects
challenges
future
proposed.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 15, 2024
Abstract
Water
electrolysis
in
alkaline
media,
demonstrating
robust
facility
and
cheap
electrolyzer
construction,
are
regarded
as
a
promising
strategy
for
industrial
green
hydrogen
generation.
Exploring
effective
evolution
electrocatalysts
is
remained
an
obstacle
to
date,
which
requires
additional
effort
obtain
active
by
water
dissociation
promote
the
following
unfavorable
coupling
further
H
2
release.
Herein,
MoO
supported
RuNi
nanoparticle
(RuNi‐MoO
)
constructed
efficient
electrocatalyst
evolution.
Experimental
theoretical
analysis
demonstrate
that
optimized
built‐in
electric
field
at
interface
between
alloy
simultaneously
accelerates
kinetics
spillover.
It
attains
current
densities
of
10
100
mA
cm
−2
ultralow
potential
−0.019
−0.086
V
versus
RHE,
respectively,
along
with
rapid
cleavage
kinetics,
even
surpasses
commercial
Pt/C.
The
constructing
anion
exchange
membrane
adopting
RuNi‐MoO
cathode
density
1
A
low
voltage
1.71
steadily
operates
over
1000
h
large
.
