Langmuir,
Год журнала:
2024,
Номер
40(46), С. 24494 - 24506
Опубликована: Ноя. 5, 2024
Metal
nanoparticle
(NP)
incorporated
conductive
polymer
films
are
attractive
for
their
mechanical
stability
biomedical
applications
and
as
heterogeneous
electrocatalysis
materials.
Novel
approaches
to
generate
these
materials
with
tunable
properties
still
being
sought.
Herein,
the
interface
between
two
immiscible
electrolyte
solutions
(ITIES)
has
been
employed
a
molecularly
sharp
reproducible
platform
simultaneous
Au
NP
poly(9-vinylcarbazole)
generation.
Three
interfaces
have
compared,
including
water|1,2-dichloroethane
(w|DCE),
water|α,α,α-trifluorotoluene
(w|TFT),
water|ionic
liquid
(w|IL).
In
this
case
IL
was
P8888TB
(tetraoctylphosphonium
tetrakis(pentafluorophenyl)borate).
9-Vinylcarbazole
(VC)
can
polymerize
via
routes,
either
propagating
through
vinyl
substituent
or
aryl
rings.
The
former
gives
rise
white
semiconducting
wide
bandgap,
while
latter
produces
green,
conducting
polymer.
External
potential
control
voltammetric
cycling
found
film
more
rapidly
favoring
electron
transfer
formation
of
green
poly(VC)
variant
at
ITIES.
This
free-standing
that
could
be
easily
removed
from
interface.
absence
external
control,
crystals
formed
within
oil
phase
spontaneously
likely
AuCl4–
w
→
o
followed
by
homogeneous
reaction
mechanism.
Scanning
electrochemical
microscopy
probe
approach
curve
experiments
were
used
quantify
electroactivity
complemented
direct
conductivity
measurements.
Microchimica Acta,
Год журнала:
2024,
Номер
191(3)
Опубликована: Фев. 22, 2024
The
modification
of
graphite
screen-printed
electrodes
(SPEs)
is
reported
using
an
eco-friendly
and
extremely
fast
method
based
on
the
direct
cobalt
pin
electrode-to-SPE
spark
discharge
at
ambient
conditions.
This
approach
does
not
utilize
any
liquids
or
chemical
templates,
produce
waste,
allows
in-situ
generation
CoxOy
nanoparticles
onto
electrode
surface
development
efficient
electrocatalytic
sensing
surfaces
for
determination
H2O2.
Co-spark
SPEs
were
characterized
scanning
electron
microscopy,
energy-dispersive
X-ray
spectroscopy
x-ray
photoelectron
(XPS),
revealing
formation
confined
diverse
oxidation
states
species.
also
with
cyclic
voltammetry
electrochemical
impedance
spectroscopy.
Redox
transitions
electrocatalysts
are
demonstrated
by
polarization
studies,
showing
different
oxides
(CoxOy),
varying
XPS
results.
Amperometric
measurements
0.3
V
vs.
Ag/AgCl
revealed
a
linear
relationship
between
current
response
concentration
H2O2
over
range
1
-
102
μM,
achieving
limit
detection
(3σ/m)
0.6
μM.
interference
effect
various
electroactive
species
was
effectively
addressed
employing
dual
in
absence
presence
enzyme
catalase.
analytical
utility
evaluated
antioxidant
rich
real-world
samples,
such
as
energy
drinks,
demonstrating
sufficient
recovery.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 27, 2025
Abstract
Recent
efforts
to
develop
cathode
materials
for
potassium‐ion
batteries
(KIBs)
have
focused
on
maximizing
specific
capacity.
However,
real
applications
will
require
thick
electrodes
with
high
areal
capacity
that
can
achieve
reasonable
rate
performance,
which
is
a
significant
challenge.
While
Prussian
blue
analogs
(PBAs)
show
promise
fast
K‐ion
storage,
they
often
bespoke
synthesis.
In
this
study,
potassium
ferricyanide
(K
3
Fe(CN)
6
,
KFC)
explored
as
commercially
available
and
cost‐effective
alternative.
Using
liquid‐phase
exfoliation,
KFC
powder
converted
into
2D
nanoplatelets,
are
combined
single
wall
carbon
nanotubes
(SWCNT)
form
porous,
conductive,
mechanically
tough
electrodes.
This
KFC/SWCNT
nanocomposite
delivers
reversible
capacities
up
98
mAh
g
−1
at
20
mA
92%
retention
after
500
cycles.
These
composite
be
fabricated
thicknesses
mass
loadings
105
µm
9.6
mg
cm
−2
respectively
an
of
0.65
the
highest
reported
among
PBAs.
Despite
being
limited
by
solid‐state
diffusion,
short
diffusion
paths
associate
nanoplatelet
geometry
enable
excellent
performance.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
The
naturally
self‐limiting
oxide
formed
on
the
surface
of
liquid
metals
can
be
exfoliated
and
transferred
onto
various
substrates.
This
layer
with
a
thickness
few
nanometers
is
typically
highly
transparent
engineered
for
applications
in
large‐area
optoelectronics.
While
incorporation
solvated
elements
into
interfacial
post‐transition
metal‐based
demonstrated
n
‐doping,
achieving
p
‐doping
such
ultrathin
layers
remains
significant
challenge.
In
this
study,
use
dissolved
indium
(In),
platinum
(Pt),
gold
(Au),
palladium
(Pd),
copper
(Cu)
gallium
(Ga)‐based
alloys
investigated
to
create
high‐entropy
metal
system.
allows
exfoliation
p‐
doped
layer,
predominantly
composed
(Ga
2
O
3
).
these
system
results
their
atomic
dispersion,
Cu
exhibiting
limited
presence.
atomically
dispersed
Pt,
Au,
Pd
scavenge
oxygen
during
at
moderate
temperatures
release
them
cooling
down,
promoting
emergence
trivalent
metallic
Ga
layer.
work
presents
novel
doping
strategy
achieve
‐doped
liquid‐metal‐derived
layers,
which
maintain
high
transparency.
Rechargeable
sodium-ion
batteries
(SIBs)
have
attracted
increasing
research
interest
because
of
their
inherent
advantages
such
as
a
similar
working
principle
to
lithium-ion
(LIBs)
and
plentiful,
even-distributed,
inexpensive
Na
resources.
However,
ions
possess
larger
ionic
radius
(1.07
Å)
compared
that
Li
(0.76
Å),
which
brings
key
challenges
irreversible
capacity
loss,
sluggish
kinetics,
considerable
volume
expansion,
low
initial
coulombic
efficiency
(ICE)
SIBs,
especially
for
anodes.
Despite
these
challenges,
there
been
ongoing
efforts
develop
various
synthesis
regulation
strategies
enhance
the
electrochemical
performance
SIB
anode
materials
they
are
summarized
here.
In
this
review,
significance
developing
types
materials,
issues
face
discussed
first.
Then
developed
compositional,
structural,
interfacial
regulations
based
on
different
methods
summarized.
Finally,
in
conclusions
outlooks,
present
status
is
concluded
future
development
directions
proposed.
In
this
work,
a
Co3O4@PEDOT
composite
with
flexible
and
conductive
poly(3,4-ethylenedioxythiophene)
(PEDOT)-coated
porous
Co3O4
polyhedrons
is
prepared.
The
hierarchical
are
obtained
by
the
treatment
of
cobalt
metal-organic
framework
(ZIF-67)
precursors,
their
surface
coated
PEDOT
via
in
situ
multistage
oxidative
polymerization
3,4-ethylenedioxythiophene.
Various
characterizations,
such
as
X-ray
diffraction
(XRD),
transmission
electron
microscopy
(TEM),
scanning
(SEM),
indicate
that
exhibits
core-shell
structure.
core
polyhedron
structure
made
up
nanoparticles,
while
shell
composed
amorphous
PEDOT.
anode
lithium-ion
battery
tested
for
charge-discharge
performance
excellent
electrochemical
performance,
delivering
capacities
586
mAh
g-1
711
at
current
densities
0.3
1C
(1C
=
1A
g-1)
200
cycles,
respectively.
As
contrast,
uncoated
sample
only
has
capacity
close
to
zero
(4
0.3C.
These
results
intact
good
polymer
improves
electronic
property
ensures
structural
stability
Co3O4.
can
provide
abundant
space
pathways,
which
alleviate
impact
volume
changes
accelerate
diffusion
dynamics
during
cyclic
process.
Energy & Fuels,
Год журнала:
2024,
Номер
38(21), С. 21521 - 21534
Опубликована: Окт. 15, 2024
The
liquid-phase
exfoliation
process
has
been
successfully
applied
to
nonlayered
materials
produce
quasi-2D
nanoplatelets.
A
slight
variation
in
bonding
anisotropy
the
starting
material
can
result
formation
of
2D
platelet-shaped
particles
with
a
relatively
low
aspect
ratio.
This
advancement
offers
promising
strategy
create
from
previously
unexplored
materials.
In
this
study,
we
investigate
arsenic
sulfide
(As
