Abstract
This
study
explores
the
role
of
S
vacancies
in
MoS
2
enhancing
its
piezocatalytic
efficiency.
Sulfur
crystal
lattice
introduce
localized
changes
electronic
structure
and
charge
distribution,
improving
material's
piezoelectric
response.
Characterization
catalysts
involved
techniques
like
field‐emission
scanning
electron
microscopy
(FESEM),
X‐ray
diffraction
(XRD),
transmission
(TEM),
photoelectron
spectroscopy
(XPS).
Electrochemical
measurements,
including
impedance
(EIS)
Mott–Schottky
(M‐S)
analysis,
are
performed
to
assess
performance.
The
also
employed
density
functional
theory
(DFT)
calculations
investigate
hydrogen
adsorption
properties
with
vacancies.
results
demonstrated
that
S‐deficient
significantly
enhanced
H
evolution.
production
rates
different
vacancy
concentrations
measured
under
ultrasonic
vibration.
sample
an
optimal
concentration
(MS‐1)
exhibited
highest
rate
1423.29
µmol
g
−1
h
,
compared
439.06
for
pristine
(MS‐0).
improved
performance
is
attributed
increased
polarization
efficient
separation
facilitated
by
Advanced Materials,
Год журнала:
2024,
Номер
36(19)
Опубликована: Фев. 1, 2024
Abstract
Practical
application
of
triboelectric
nanogenerators
(TENGs)
has
been
challenging,
particularly,
under
harsh
environmental
conditions.
This
work
proposes
a
novel
3D‐fused
aromatic
ladder
(FAL)
structure
as
tribo‐positive
material
for
TENGs,
to
address
these
challenges.
The
3D‐FAL
offers
unique
materials
engineering
platform
tailored
properties,
such
high
specific
surface
area
and
porosity,
good
thermal
mechanical
stability,
tunable
electronic
properties.
fabricated
3D‐FAL‐based
TENG
reaches
maximum
peak
power
density
451.2
µW
cm
−2
at
5
Hz
frequency.
More
importantly,
the
maintains
stable
output
performance
operating
environments,
over
wide
temperature
(−45–100
°C)
humidity
ranges
(8.3–96.7%
RH),
representing
development
FAL
sustainable
energy
generation
challenging
Furthermore,
proves
be
promising
device
speed
monitoring
system
engaging
reconstruction
in
virtual
reality
snowy
environment.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(24)
Опубликована: Апрель 5, 2024
Abstract
Triboelectric
nanogenerators
(TENGs)
are
recognized
for
energy
conversion
efficiency
and
applications
including
electronics
storage
devices.
This
study
introduces
a
groundbreaking
development
in
TENG
by
incorporating
negative
Poisson's
ratio
metamaterials
to
fabricate
auxetic‐assisted
triboelectric
(Auxetic‐TENG),
subversively
overcoming
the
low
power
density
of
traditional
materials.
Subtly,
an
integrated
layer‐by‐layer‐assembly
core–shell
accumulation
strategy
is
employed
create
synclastic
polytetrafluoroethylene
friction
shell‐skeleton,
into
which
positive
nature
collagen
aggregate
(CA)
foam
inwardly
embedded
as
core‐material.
Surprisingly,
on‐demand
introduction
synergy
with
CA
significantly
increases
contact
area
mechanical
absorption
Auxetic‐TENG
under
pressure.
enhancement
electricity
capitalizes
on
contraction
origins
metamaterials,
expansion
characteristics
materials
within
structure,
facilitating
synergistic
compression
stratum.
Consequently,
achieves
open‐circuit
voltage
85
V,
overturning
four
times
compared
conventional
contact–separation
TENG,
4.2
W
m
−2
.
Application
experiments
demonstrate
superior
performance
auxetic‐TENG
various
ratios
stress
conditions,
highlighting
its
potential
real‐time
monitoring
healthcare
applications.
Abstract
This
study
explores
the
role
of
S
vacancies
in
MoS
2
enhancing
its
piezocatalytic
efficiency.
Sulfur
crystal
lattice
introduce
localized
changes
electronic
structure
and
charge
distribution,
improving
material's
piezoelectric
response.
Characterization
catalysts
involved
techniques
like
field‐emission
scanning
electron
microscopy
(FESEM),
X‐ray
diffraction
(XRD),
transmission
(TEM),
photoelectron
spectroscopy
(XPS).
Electrochemical
measurements,
including
impedance
(EIS)
Mott–Schottky
(M‐S)
analysis,
are
performed
to
assess
performance.
The
also
employed
density
functional
theory
(DFT)
calculations
investigate
hydrogen
adsorption
properties
with
vacancies.
results
demonstrated
that
S‐deficient
significantly
enhanced
H
evolution.
production
rates
different
vacancy
concentrations
measured
under
ultrasonic
vibration.
sample
an
optimal
concentration
(MS‐1)
exhibited
highest
rate
1423.29
µmol
g
−1
h
,
compared
439.06
for
pristine
(MS‐0).
improved
performance
is
attributed
increased
polarization
efficient
separation
facilitated
by
