Molecules,
Год журнала:
2024,
Номер
29(21), С. 5195 - 5195
Опубликована: Ноя. 2, 2024
Metal
sulfide-based
composites
have
become
increasingly
common
as
materials
used
for
electrodes
in
supercapacitors
because
of
their
excellent
conductivity,
electrochemical
activity,
and
redox
capacity.
This
study
synthesized
a
composite
NiFeS@MoS2@rGO
nanostructure
using
simple
hydrothermal
approach.
The
nanocomposite
consisted
the
nickel
sulfide
iron
doped
with
MoS2@rGO.
A
three-electrode
cell
is
employed
to
investigate
properties
electrode.
results
demonstrated
an
optimal
specific
capacitance
3188
F/g
at
1.4
A/g
1
M
KOH
electrolyte.
Furthermore,
supercapattery
designed
utilizing
NiFeS@MoS2@rGO//AC
positive
electrode
activated
carbon
(AC)
negative
materials.
resulting
voltage
1.6
V,
achieving
capacity
value
189
C/g
A/g.
It
also
energy
density
55
Wh/kg
enhanced
power
3800
W/kg.
hybrid
device
remarkable
stability
cycling
95%
over
30,000
charge–discharge
cycles
current
supercapattery,
which
has
storage
capabilities,
source
operating
different
portable
electronic
devices.
Journal of Industrial and Engineering Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 1, 2024
Over
the
past
twenty-five
years,
MAX
phases
and
their
derivatives,
MXenes,
have
become
a
focal
point
in
materials
research.
These
compounds
seamlessly
blend
ceramic
metallic
properties,
offering
high
thermal
electrical
conductivity,
mechanical
strength,
low
density,
resistance
to
extreme
conditions.
Their
versatility
positions
them
as
promising
candidates
for
diverse
applications,
particularly
advanced
photo-catalysis
electro-catalysis
hydrogen
evolution.
Furthermore,
MXenes
are
potential
storage
materials,
with
unique
structures
that
provide
ample
space
efficient
gas
release,
vital
clean
energy
technologies
like
fuel
cells.
This
review
aims
comprehensively
analyze
roles
photo-catalysis,
electro-catalysis,
storage,
focus
on
layered
crystal
structure.
integrate
superior
metal
attributes,
while
offer
tunable
electronic
enhance
catalytic
performance.
Continued
exploration
is
crucial
unlock
full
potential,
advancing
beyond.
Arabian Journal of Chemistry,
Год журнала:
2024,
Номер
17(9), С. 105866 - 105866
Опубликована: Июнь 13, 2024
Due
to
the
rapid
technological
advancements
of
various
sectors
in
recent
decades,
there
has
been
a
growing
need
for
energy,
necessitating
development
large-capacity,
robust,
adaptable,
and
economical
energy
storage
systems.
The
most
current
energy-storage
material
known
as
"MXene"
is
two-dimensional
layered
transition
metal
nitride
or
carbonitride
carbide.
A
covalently
bonded
layer
exfoliated
from
its
parent
MAX
(Mn
+
1AXn)
phase
by
selective
chemical
etching.
MXene
commands
highest
demand
all
families
materials
due
extraordinary
characteristics,
which
include
high
conductivity,
flexible
surface
functional
groups,
excellent
mechanical
properties,
superior
hydrophilicity,
electrochemical
nature,
thickness
atomic
layers.
used
solid-state
supercapacitors,
batteries,
antimicrobial
films,
gas
biosensors,
water
splitting,
electromagnetic
interference
shielding,
photo-
electrocatalysis.
Because
MXene's
special
qualities,
researchers
are
concentrating
on
developing
further
both
theoretically
experimentally.
Utilizing
variety
microfabrication
processes,
microelectrodes
micro-sized
devices
(MESDs)
have
previously
created.
Distinct
methodologies
influence
not
only
apparatus's
arrangement
but
also
composition
efficacy
MESDs.
In
this
review
study,
pertinent
topics
addressed
topical
summary
state-of-the-art
regarding
MXene-based
given.
field's
challenges
prospects
future
discussed
final
part.
Heliyon,
Год журнала:
2024,
Номер
10(15), С. e35643 - e35643
Опубликована: Авг. 1, 2024
High
valence
multi
transition
metal
hydroxides
are
greatly
enriched
with
OER
redox
active
sites
due
to
strong
synergy
of
heteroatomic
nuclei.
The
efficiency
these
could
be
efficiently
improved
by
coupling
highly
conductive
substrate.
advanced
three-dimensional
(3D)
architecture
and
hydrophilic
terminal
functionalities
MXene
(MX)
considerably
enhance
the
maximum
utilization
rate
anchored
triggering
direct
growth
at
MX
Here-in,
freeze-dried
3D
network
crumpled
Vanadium-Carbide
(V2C)
sheets
regulates
crystallization
in-situ
grown
NiFeCr
on
scaffold
through
co-precipitation
process.
XPS
results
suggest
a
synergistic
chemical
interaction
that
modifies
electronic
structure
composite
ensuring
reduced
charge
transfer
resistance.
Besides,
as
found
in
FESEM
morphological
investigation,
well-dispersed
multi-transition
immobilized
open
pores
like
V2C-MX
facilitate
thoroughly
accessible
sites.
As
result,
NiFeCr@3D
has
shown
an
excellent
electrocatalytic
activity
overpotential
410
mV
current
density
200
mA
cm−2,
Tafel
slope
100
dec
1M
KOH.
significant
between
metallic
centers
support
prevent
detachment
or
agglomeration
providing
electrolytic
ions,
quick
ionic
OH−
transportation,
speedy
stable
electron
channels
thus
ensure
long-term
stability
NV-5MX
during
53
h
continuous
operation
OER.
Furthermore,
we
have
utilized
more
accurate
value
half-cell
standard
reduction
potential
Hg/HgO
electrode
Nernst
equation
represent
all
test
voltages
determine
values.
In
essence,
this
study
features
facile
approach
for
confined
presence
morphologically
unique
V2C
architectures.
Consequently,
increased
reaction
kinetics
synthesized
composites
potentially
interplay
well
dispersed
Langmuir,
Год журнала:
2024,
Номер
40(35), С. 18486 - 18502
Опубликована: Авг. 22, 2024
Carbon-based
nanostructures
are
promising
eco-friendly
multifunctional
nanomaterials
because
of
their
tunable
surface
and
optoelectronic
properties
for
a
variety
energy
environmental
applications.
The
present
study
focuses
on
the
synthesis
graphene
oxide
(GO)
with
particular
emphasis
engineering
its
optical
making
it
an
excellent
adsorbent
as
well
visible
light-active
photocatalyst.
It
was
achieved
by
modifying
improved
Hummers
method
through
optimizing
parameters
involved
in
oxidation
process.
This
controlled
allows
systematic
tailoring
structural,
optical,
functionality,
leading
to
adsorption
photocatalytic
sustainable
removal
organic
pollutants
water
treatment.
Several
spectroscopic
microscopic
characterization
techniques,
such
XRD,
SEM,
Raman,
UV-visible,
FTIR,
TEM,
XPS,
BET,
etc.
were
employed
analyze
degree
oxidation,
chemistry/functionalization,
morphological,
structural
synthesized
GO
nanostructures.
analyses
showed
functionality
active
sites
better
adsorptive
band
gap
from
2.51
2.76
eV
exhibiting
natural
sunlight
activity
(>99%)
pollutant.
Various
isotherms
have
been
studied
capability
(
Advanced Sustainable Systems,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 17, 2025
Abstract
MXenes,
a
class
of
2D
materials,
have
garnered
significant
attention
for
energy
applications
due
to
their
unique
properties.
This
study
investigates
the
influence
different
etching
media
on
synthesis
Cr
2
CT
x
MXene
derived
from
cost‐effective
AlC
MAX
phase.
Three
solutions‐
hydrofluoric
acid
(HF),
HF‐forming
(lithium
fluoride
+
Hydrochloric
acid,
LiF+HCl),
and
non‐fluoride
(sodium
hydroxide,
NaOH)
been
used
treat
ternary
carbide
phase
under
varied
reaction
conditions.
The
‐HF,
‐LiF/HCl,
‐NaOH
are
structurally,
morphologically
characterized
using
XRD,
Raman
spectroscopy,
TGA,
XPS,
SEM‐EDX,
BET‐BJH
analysis.
electrochemical
performance
is
assessed,
focusing
its
in
water
splitting
supercapacitive
applications.
materials
exhibit
lower
overpotential
values
hydrogen
evolution
(HER),
oxygen
(OER),
demonstrate
improved
pseudocapacitive
behavior,
with
enhanced
power
densities.
introduction
surface
termination
groups
(T
=
─F,
─OH,
─O)
resulted
more
open
accessible
layered
structure
an
appreciable
area,
without
any
modifications.
kinetics,
ion
transport,
diffusion,
storage
capacity,
which
beneficial
production.
