The Journal of Chemical Physics,
Journal Year:
2024,
Volume and Issue:
161(19)
Published: Nov. 18, 2024
Oxygen
evolution
reaction
(OER)
is
widely
recognized
as
a
bottleneck
in
the
kinetics
and
activity
of
decomposition
water.
Unique
geometric
design
compositional
regulation
are
important
technologies
for
achieving
significant
excellent
kinetics,
but
they
continue
to
face
obstacles
thermodynamics
kinetic
response.
Here,
"needle
mushroom"
shaped
Cu2O-NiCo2O4
heterostructure
with
abundant
active
sites
optimized
conductivity
that
grown
on
Nickel-foam
(NF)
(labeled
Cu2O-NiCo2O4/NF-2)
prepared
using
advanced
magnetron
sputtering
strategies
electrochemical
water
oxidation.
Based
advantages
efficient
charge
transfer
capabilities,
catalyst
Cu2O-NiCo2O4/NF-2
shows
superior
electrocatalytic
(low
overpotential)
impedance)
compared
nanoneedle
Cu2O-NiCo2O4/NF-1
NiCo2O4/NF
OER
alkaline
medium.
This
work
demonstrates
practical
economical
strategy
toward
fabrication
ternary
transition
metal
oxides
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: April 30, 2024
Abstract
The
potential
of
metal
oxides
in
electrochemical
energy
storage
encouraged
our
research
team
to
synthesize
molybdenum
oxide/tungsten
oxide
nanocomposites
(MoO
3
/WO
)
and
their
hybrid
with
reduced
graphene
(rGO),
the
form
MoO
/rGO
as
a
substrate
relatively
good
electrical
conductivity
suitable
active
surface.
In
this
context,
we
presented
behavior
these
an
electrode
for
supercapacitors
catalyst
oxidation
process
methanol/ethanol.
Our
engineered
samples
were
characterized
by
X-ray
diffraction
pattern
scanning
electron
microscopy.
As
result,
indicated
specific
capacitances
452
583
F/g
stability
88.9%
92.6%
after
2000
consecutive
GCD
cycles,
respectively.
Also,
nanocatalysts
showed
current
densities
117
170
mA/cm
2
at
scan
rate
50
mV/s,
71
89%,
respectively
chronoamperometry
analysis,
MOR
process.
Interestingly,
ethanol
process,
corresponding
42
106
values
70
82%
achieved.
can
be
attractive
options
paving
way
prospective
alcohol-based
fuel
cells.
Small Methods,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
Abstract
This
investigation
explores
the
potential
of
co‐incorporating
nickel
(Ni)
and
cobalt
(Co)
into
copper
oxide
(CuO)
nanostructures
for
bifunctional
electrochemical
charge
storage
oxygen
evolution
reactions
(OER).
A
facile
wet
chemical
synthesis
method
is
employed
to
co‐incorporate
Ni
Co
CuO,
yielding
diverse
nanostructured
morphologies,
including
rods,
spheres,
flake.
The
X‐ray
diffraction
(XRD)
Raman
analyses
confirmed
formation
NiCo‐CuO
nanostructure,
with
minor
phases
(NiO)
tetraoxide
(Co
3
O
4
).
High‐resolution
Transmission
Electron
Microscope
(HRTEM)
also
confirms
morphologies
oxides.
Synchrotron
absorption
spectroscopy
revealed
higher
states
Cu,
Ni,
in
enhancing
its
OER.
Site‐selective
near
edge
structure
analysis
elucidated
spatial
distribution
nanostructure.
Furthermore,
extended
fine
provided
insights
local
atomic
structures,
revealing
increased
coordination
numbers
interatomic
distances
In
situ
discloses
transformation
hydroxide
(Co(OH)
2
)
(CoO)
oxyhydroxide
(CoOOH)
exhibited
superior
specific
capacitance,
favorable
Tafel
behavior,
low
overpotential
positioning
as
promising
materials
energy
conversion
applications.
work
contributes
development
efficient
CuO
nanocatalysts.
Energy Storage,
Journal Year:
2024,
Volume and Issue:
6(7)
Published: Oct. 1, 2024
ABSTRACT
The
development
of
the
battery‐type
electrode
for
hybrid
supercapacitor
is
very
challenging
owing
to
poor
cycle
stability.
To
overcome
this
problem,
heterostructures
would
be
an
excellent
alternative
attributed
synergetic
effect
different
materials
physical
properties,
including
electrical
conductivity,
mechanical
flexibility,
and
so
forth.
Furthermore,
also
offer
significant
redox
reactions
on
account
more
active
sites,
enhanced
charge
transfers
kinetics
via
extra
electron
carriers,
ion
diffusion
rates,
along
with
improved
cyclic
Herein,
we
prepared
Co
3
O
4
nanospheres
WO
3−
x
nanorods
a
single‐step
wet
chemical
method
at
reaction
time
1
h
(CoW1)
6
(CoW2).
electrochemical
investigations
reveal
specific
capacitance
CoW1
(157
F
g
−1
)
than
CoW2
(188
0.3
A
.
aqueous
(AHS)
shows
38
Notably,
it
exhibits
remarkable
capacity
retention
93%
up
10
000
cycles
100
mV
s
Thus,
have
great
potential
next‐generation
energy
storage
devices.
