Advances in Natural Sciences Nanoscience and Nanotechnology,
Journal Year:
2024,
Volume and Issue:
16(1), P. 015004 - 015004
Published: Dec. 30, 2024
Abstract
The
advancement
of
efficient
and
durable
electrocatalysts
is
crucial
for
enhancing
overall
water-splitting
technologies,
particularly
in
harsh
acidic
environments.
In
this
work,
we
treated
carbon
cloth
(CC)
with
a
mixture
HNO
3
H
2
SO
4
to
improve
its
surface
properties
use
it
as
substrate
depositing
Au/Co
O
catalysts.
acid-treated
CC
(TCC)
exhibited
enhanced
hydrophilicity
due
the
introduction
increased
hydroxyl
carboxyl
functional
groups,
leading
higher
loading
catalyst
(3.36
wt%
Co
1.42
Au)
combined
uniform
morphology
compared
untreated
CC.
resulting
/TCC
demonstrated
several
desirable
characteristics,
including
specific
area
40.5
m
g
−1
smaller
charge
transfer
resistance.
When
employed
bifunctional
electrocatalyst
water
splitting,
low
cell
voltage
1.62
V
0.5
M
electrolyte
outstanding
durability,
maintaining
performance
over
24
h
at
current
density
10
mA
cm
−2
without
significant
degradation,
attributed
strong
interfacial
interaction
between
substrate.
wettability,
area,
catalyst-support
arising
from
acid
treatment
were
key
factors
enabling
superior
electrochemical
system.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(41), P. 28023 - 28031
Published: Jan. 1, 2024
Dual-doped
ruthenium-based
nanocrystals
were
developed
as
efficient
and
stable
electrocatalysts
for
acidic
overall
seawater
splitting
with
superior
activity
durability.
Coatings,
Journal Year:
2025,
Volume and Issue:
15(2), P. 226 - 226
Published: Feb. 14, 2025
The
urea
electro-oxidation
reaction
(UOR)
is
emerging
as
a
new
energy
conversion
technology
and
promising
method
for
alleviating
water
eutrophication
problems.
However,
rationally
designed
structure
of
the
electrode
materials
urgently
required
to
achieve
high
UOR
performance.
Herein,
P-doped
MOF-derived
Co3O4
nanowire
arrays
grown
on
nickel
foam
(P-Co3O4/NF)
are
successfully
synthesized
via
growth
Co-MOF
subsequent
calcination
followed
by
phosphorization
treatment.
Owing
optimized
electronic
structure,
as-prepared
P-Co3O4/NF
composite
exhibits
much
higher
electrocatalytic
performance
than
undoped
Co3O4/NF
sample.
Beyond
this,
meticulous
one-dimensional
three-dimensional
skeleton
contribute
enhanced
activity
stability
toward
UOR.
As
result,
displays
low
overpotential
1.419
V
vs.
RHE
at
50
mA
cm−2,
small
Tafel
slope
82
mV
dec−1,
well
favorable
long-term
over
65,000
s
in
1.0
M
KOH
with
urea.
This
work
opens
avenue
designing
non-precious
electrocatalysts
high-performance
reactions.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 22, 2025
Twinning,
as
an
effective
strain
engineering
strategy,
has
demonstrated
significant
potential
in
modifying
cost-effective
transition
metal
electrocatalysts.
However,
controllable
construction
and
structure-activity
relationships
of
twinning
electrocatalysts
remain
formidable
challenges.
Here,
we
engineered
a
lattice-matched
Co/CoO
heterostructure
with
enriched
twin
boundaries
through
flash
Joule
heating,
where
the
twins
form
via
lattice
matching
within
homogeneous
space
groups.
XAFS
analysis
reveals
significantly
reduced
Co
coordination
numbers
heterostructure,
indicating
substantial
atomic
displacement
from
equilibrium
positions.
The
coherent
interfaces
induce
trapped
strain,
downshifting
d-band
center
by
0.4
eV
flattening
bands
near
Fermi
level,
optimizing
electronic
structure
for
hydrogen
evolution
reaction.
Consequently,
exhibits
exceptional
performance
ultralow
overpotential
49
mV
at
10
mA
cm-2
alkaline
media
remarkable
stability
over
500
h.
Notably,
water
splitting
can
be
driven
cell
voltage
2.05
V
1
A
cm-2.
