Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: Sept. 13, 2023
Abstract
Metal–organic
frameworks
(MOFs)
are
recognized
as
a
desirable
class
of
porous
materials
for
energy
storage
applications,
despite
their
limited
conductivity.
In
the
present
study,
Co-MOF-71
was
fabricated
high-performance
supercapacitor
electrode
at
ambient
temperature
using
fast
and
straightforward,
one-pot
cold
plasma
method.
A
based
on
Co-MOF@rGO
also
synthesized
by
adding
reduced
graphene
oxide
(rGO)
during
processing
to
increase
capacitance
retention
stability
after
4000
cycles
from
80
95.4%.
The
provided
specific
(Cs)
651.7
Fg
−1
1
Ag
,
whereas
produced
Cs
value
967.68
.
addition,
we
an
asymmetric
device
(Co-MOF@rGO||AC)
Co-MOF-rGO
high-rate
positive
activated
carbon
(AC)
negative
electrode.
This
hybrid
has
remarkable
power
density.
combination
MOFs
with
in
environment
resulted
formation
three-dimensional
nanostructure
composed
nanosheets.
exhibited
increased
number
electroactive
sites,
providing
benefits
applications.
Chemical Communications,
Journal Year:
2024,
Volume and Issue:
60(39), P. 5104 - 5135
Published: Jan. 1, 2024
This
review
has
examined
the
advancements
and
challenges
in
development
of
transition
metal-based
electrocatalysts
for
alkaline
water
splitting
reaction
last
decade.
Catalysts,
Journal Year:
2023,
Volume and Issue:
13(5), P. 802 - 802
Published: April 26, 2023
The
development
of
transition
metal
(TM)
catalysts
to
replace
precious
metals
has
garnered
increasing
interest.
Specifically,
platinum
(Pt)-based
have
been
extensively
investigated
for
their
electrochemical
performance
in
hydrogen
evolution
reaction
(HER),
which
offer
a
clean
means
producing
fuel
without
carbon
emissions.
However,
the
reliance
on
Pt-based
hindered
progress
HER
development.
Therefore,
researchers
explored
metal-organic
frameworks
(MOFs)
as
substitute
noble
address
this
issue.
Nevertheless,
low
electroconductivity
pure
MOFs
restricts
application
fields.
To
overcome
limitation,
MXenes
emerged
promising
two-dimensional
(2D)
material
coupling
with
create
an
electrocatalyst
high
electrical
conductivity,
large
surface
area,
and
tunable
structure.
In
study,
we
report
synthesis
Ti3C2Tx
(MXene)
nanosheet-encapsulated
catalyst
(Ti3C2Tx@ZIF-8)
activity
cost
by
encapsulating
precursor
ZIF-8
alkaline
media.
exhibits
overpotential
only
507
mV
at
20
mA/cm2
Tafel
slope
value
77
mV/dec.
Additionally,
cyclic
voltammetry
(CV)
indicates
active
area
(ECSA)
122.5
cm2,
chronopotentiometry
demonstrates
stable
nature
over
h
any
significant
changes
value.
excellent
properties
Ti3C2Tx@ZIF-8
suggest
its
potential
energy
conversion
applications.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
17(15)
Published: March 12, 2024
MXenes,
a
two-dimensional
(2D)
material,
exhibit
excellent
optical,
electrical,
chemical,
mechanical,
and
electrochemical
properties.
Titanium-based
MXene
(Ti-MXene)
has
been
extensively
studied
serves
as
the
foundation
for
2D
MXenes.
However,
other
transition
metals
possess
potential
to
offer
properties
in
various
applications.
This
comprehensive
review
aims
provide
an
overview
of
properties,
challenges,
key
findings,
applications
less-explored
vanadium-based
MXenes
(V-MXenes)
their
composites.
The
current
trends
V-MXene
composites
energy
storage
conversion
have
thoroughly
summarized.
Overall,
this
offers
valuable
insights,
identifies
opportunities,
provides
suggestions
future
advancements
storage/conversion
Carbon Resources Conversion,
Journal Year:
2024,
Volume and Issue:
7(4), P. 100235 - 100235
Published: March 5, 2024
We
report
magnetically-separable,
reusable,
green-synthesized
Fe3O4/rGO/ZnO,
as
heterogeneous
catalyst
for
photo-Fenton
degradation
of
organic
pollutants
in
aqueous
solution
under
certain
treatments.
Fe3O4
nanoparticles
was
using
Moringa
oleifera
leaf
extract,
while
rGO
synthesized
utilizing
Amaranthus
viridis
extract.
Fe3O4/rGO
composited
sonication
treatment.
Afterwards,
doped
with
ZnO
various
concentration
ZnO.
X-ray
diffraction
and
selected
area
electron
showed
that
had
spinel
cubic
hexagonal
structure,
respectively;
another
phase
appeared
Fe2O3
structure.
Crystallite
size
decreased
the
increased.
Morphology
image
almost
spherical,
non-uniform,
slightly
dispersed
particle
agglomerated
condition,
attaching
to
sheets.
The
Fe3O4,
Fe3O4/rGO,
Fe3O4/rGO/ZnO
is
14.3;
14.1;
10.4
nm,
respectively.
Fourier-transform
infrared
spectra
metallic
functional
groups,
such
Fe-O
Zn–O
at
562–589
462–478
cm−1
also
suggests
nanocomposite
formation.
However,
blue-shift
absorption
band
gap
widening
were
observed
addition.
Raman
spectroscopy
revealed
formation
as-synthesized
GO
rGO.
Vibrating
sample
magnetometer
exhibited
superparamagnetic
properties.
Removal
efficiency
photodegradation
methylene
blue
optimal
treatment,
reached
100
%
within
180
min
uptake
every
30
min.
Photodegradation
analyzed
Langmuir-Hinshelwood
kinetic
model,
resulting
rate
constant
24.7
×
10−3
min−1
half-life
time
28.1
optimum
Reusability
photocatalytic
activity
after
3
cycles
only
a
tiny
drop
catalytic
efficiency.
Meanwhile,
it
possesses
high
stability
potential
an
environmentally
friendly
reusable
photocatalyst
wastewater
degradation.
