Abstract
This
study
proposes
a
novel
approach
for
the
rapid
transformation
of
bimetallic
NiCo‐oxides
into
trimetallic
NiCoPt
alloys
using
pulsed
laser
technique
in
an
ethanol
medium
presence
Pt
salts.
The
electrochemical
results
demonstrate
exceptional
dual‐functional
activity
optimized
NiCoPt‐10
alloy,
effectively
catalyzing
both
hydrogen
evolution
reaction
(HER)
and
hydrazine
oxidation
(HzOR).
Specifically,
alloy
presents
low
overpotential
90
mV
at
10
mA·cm
−2
HER
small
working
potential
0.068
V
versus
reversible
electrode
(RHE)
HzOR.
In
situ
Raman
spectroscopy
theoretical
calculations
delivered
insights
alloy.
Consequently,
overall
splitting
(OHzS)
electrolyzer,
employing
NiCoPt‐10||NiCoPt‐10
configuration,
required
only
0.295
to
deliver
.
Notably,
this
catalyst
as
cathode
combined
with
Zn
foil
anode
Zn–hydrazine
(Zn‐Hz)
battery,
achieved
efficient
(H
2
)
production
energy
efficiency
97%.
Furthermore,
self‐powered
H
is
realized
by
integrating
Zn‐Hz
battery
OHzS
demonstrating
its
excellent
practical
applications.
Thus,
synthetic
strategy
can
aid
designing
effective
electrocatalysts
addressing
challenges
production.
Small Structures,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 26, 2025
In
this
study,
a
flexible
room‐temperature
ammonia
(NH
3
)
sensor
is
developed
based
on
MoO
/CuO/Cu
2
O
hybrid
nanoclusters
(HNCs),
specifically
designed
for
the
noninvasive
diagnosis
of
nephropathy.
The
HNCs
achieve
an
ultralow
detection
limit
0.73
ppm,
with
high
sensitivity
(0.163
ppm
−1
and
rapid
response
recovery
times
(16.4
90.6
s).
integration
(n‐type)
CuO
Cu
(p‐type)
forms
multi‐heterojunctions,
enhancing
gas‐sensing
performance
through
efficient
charge
separation
improved
NH
adsorption.
Additionally,
demonstrates
excellent
mechanical
flexibility
long‐term
stability
under
dynamic
deformation.
To
address
humidity
interference
in
exhaled
breath
analysis,
hydrophobic
polytetrafluoroethylene
layer
coated
via
radio
frequency
sputtering,
ensuring
effective
differentiation
between
healthy
individuals
kidney
disease
patients.
work,
potential
multi‐heterojunction
nanostructures
developing
high‐performance,
gas
sensors
practical
health‐monitoring
applications
highlighted.
Abstract
Herein,
the
design
and
synthesis
of
Ru‐doped
CoFe‐layered
double
hydroxide
(CoFeRu─LDH)
nanostructures
is
presented
via
an
innovative
yet
straightforward
pulsed
laser
method.
The
CoFeRu─LDH
catalyst
demonstrates
outstanding
electrocatalytic
performance,
achieving
a
high
NH
4
+
Faradaic
efficiency
(FE)
89.65%
at
−0.7
V
versus
reversible
hydrogen
electrode
for
nitrite
reduction
reaction
(NO
2
−
RR)
low
overpotential
297
mV
10
mA
cm
−2
oxygen
evolution
(OER).
Comprehensive
in
situ
ex
analyses
reveal
electrochemically
energetic
species
formed
on
surface
during
NO
RR
OER.
Theoretical
studies
confirm
that
Ru
doping
plays
imperative
role
tuning
electronic
structure
CoFeRu─LDH,
lowering
its
barriers,
thereby
remarkably
enhancing
OER
performance.
Specifically,
galvanic
Zn–nitrite
battery
using
as
cathode
efficiently
converts
to
with
FE
96.8%
while
concurrently
generating
electricity
power
density
4.14
.
Furthermore,
pairing
anode
Pt/C
water
electrolysis
enables
H
production
cell
voltage
1.57
This
study
presents
new
pathway
designing
versatile,
high‐performance
electrocatalysts
sustainable
energy
conversion
carbon‐free
3
fuels.
Abstract
Herein,
a
straightforward
approach
using
pulsed
laser
technology
to
synthesize
selective
hexagonal‐close‐packed
(
hcp
)
Ru
nanoparticles
attached
Cu
nanospheres
(Ru/Cu)
as
bifunctional
electrocatalyst
for
catalyzing
the
hydrogen
evolution
reaction
(HER)
and
formaldehyde
oxidation
(FOR)
are
reported.
Initially,
Ru‐doped
CuO
flakes
synthesized
coprecipitation
method
followed
by
transformation
into
Ru/Cu
composites
through
strategy
involving
irradiation
in
liquid.
Specifically,
optimized
Ru/Cu‐4
composite
not
only
demonstrates
low
overpotential
of
182
mV
at
10
mA·cm
−2
HER
but
also
an
ultralow
working
potential
0.078
V
(versus
reversible
electrode)
FOR
same
current
density.
Remarkably,
FOR∥HER‐coupled
electrolyzer
employing
Ru/Cu‐4∥Ru/Cu‐4
system
achieves
H
2
production
both
electrodes
with
cell
voltage
0.42
while
co‐synthesizing
formic
acid.
Furthermore,
density
functional
theory
analyses
elucidate
that
superior
activity
originates
from
adsorption
energies
reactive
species
on
catalyst
surfaces
during
FOR,
facilitated
synergistic
coupling
between
Cu.
This
study
presents
alternative
synthesizing
highly
effective
electrocatalytic
materials
use
energy‐efficient
cosynthesis
value‐added
chemicals
suitable
practical
applications.
The
current
study
presents
a
quick
and
simple
method
for
synthesizing
Ir
nanoclusters
decorated
on
an
N-doped
carbon
(NC)
matrix
via
pulsed
laser
ablation
in
liquid,
followed
by
pyrolysis.
resulting
Ir-NC
material
acts
as
dual-functional
electrocatalyst,
efficiently
facilitating
hydrogen
generation
through
the
hydrazine
oxidation
reaction
(HzOR)
evolution
(HER)
alkaline
seawater.
optimized
Ir-NC-2
catalyst
exhibits
low
operating
potential
of
23
mV
versus
reversible
electrode
HzOR
remarkably
overpotential
24
HER,
achieving
density
10
mA
cm
