International Journal of Energy Research,
Journal Year:
2024,
Volume and Issue:
2024(1)
Published: Jan. 1, 2024
A
zeolitic
imidazolate
framework
(ZIF‐9)
was
synthesized
via
solvothermal
reaction
using
cobalt
(Co)
salt
and
benzimidazole
ligands
in
the
presence
of
polyacrylonitrile.
The
precursor
electrospun
to
form
carbon
nanofibers
(CNFs)
creating
freestanding,
binder‐free
supercapacitor
electrodes.
Polyvinylpyrrolidone
(PVP)
NaCl
were
added
solution
reduce
fiber
diameter
improve
structural
integrity
during
high‐temperature
annealing.
Co/CNF
sample
achieved
an
areal
capacitance
316
mF
cm
−2
energy
density
0.043
mWh
at
a
current
1
mA
.
addition
PVP
reduced
by
30%
increased
3.6
times.
optimal
maintained
96.2%
its
over
10,000
charge/discharge
cycles,
demonstrating
strong
electrochemical
stability.
Symmetrical
pouch
cells
with
developed
electrodes
powered
light‐emitting
diode
humidity/temperature
sensor,
their
potential
portable
electronics.
Constructing
low-cost,
high-efficiency,
and
earth-abundant
electrocatalysts
for
enhancing
the
energy
efficiency
of
water
splitting
is
highly
desirable.
Herein,
we
employed
a
facile
strategy
V
cation
doping
Ru
nanoparticles
modification
to
construct
multifunctional
NiFe-LDH
electrocatalyst
(Ru/V-NiFe-LDH)
on
nickel
foam
(NF)
substrate.
This
Ru/V-NiFe-LDH/NF
catalyst
exhibited
exceptional
catalytic
activity
(e.g.,
small
overpotentials
Tafel
slope)
good
stability
in
HER,
OER,
UOR,
indicating
significantly
lower
than
that
commercial
Pt–C
RuO2.
These
excellent
electrochemical
properties
primarily
resulted
from
effects
modification,
which
altered
surface
charge
state
matrix,
led
electron
rearrangement,
accelerated
transfer,
provided
more
active
sites,
enhanced
intrinsic
activity.
Moreover,
when
assembled
into
two-electrode
system
with
overall
water/urea
splitting,
low
cell
voltage
1.53
1.40
@10
mA
cm–2
was
afforded.
Furthermore,
this
also
outstanding
stability,
only
19%
decay
high
current
density
at
50
after
48
h.
performances
far
surpass
those
RuO2||Pt–C
most
nonprecious-metal
catalysts.
work
highlights
rational
design
high-performance
applications.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 10, 2024
The
development
of
a
nonnoble
metal-based
cost-effective,
efficient,
and
durable
bifunctional
electrocatalyst
is
crucial
to
achieving
the
goal
carbon
neutrality.
In
this
study,
structural
interfacial
engineering
approach
employed
design
2D-2D
hierarchical
nickel
MOF/nickel
hydroxide-derived
selenide/nickel
telluride
dual-phase
material
through
single-step
selenotellurization
process.
rational
highly
ordered
nanoarchitectures
provides
well-defined
voids
ample
pathways
for
ion
diffusion.
Furthermore,
works
synergistically
at
heterojunctions,
providing
local
enrichment
mechanism
catalytic
As
result,
Ni
Small Methods,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Wide
spread
adaptation
of
green
hydrogen
can
help
to
mitigate
the
serious
climate
issues,
increasing
global
energy
demands
and
development
advanced
electrocatalysts
robust
under
industrial
conditions
is
one
key
technological
challenges.
Herein,
chromium‐doped
nickel‐boride‐phosphide
(Cr/NiBP)
micro
sphere
(MS)
electrocatalyst
demonstrated
via
a
two‐step
hydrothermal
approach
along
with
post‐annealing.
The
Cr/NiBP
MS
demonstrates
low
evolution
reaction
oxygen
evaluation
over
potentials
78
250
mV
at
100
mA
cm
−2
in
1
m
KOH,
out
performing
most
reported
catalysts.
ǁ
exhibits
only
1.54
V
KOH
surpasses
benchmark
RuO
2
(+)
Pt/C
(−)
up
2000
,
which
sets
it
as
best
bifunctional
electrocatalysts.
Impressively,
maintains
stable
performance
for
240
h
1000
6
60°C,
demonstrating
rapid
response,
anti‐corrosion
resistance,
structural
integrity
meet
operational
conditions.
Further,
super‐low
cell‐voltage
2.25
.
small
amount
Cr
atoms
incorporation
significantly
enhance
active
sites
intrinsic
properties,
accelerating
water
dissociation
intermediate
formation.
