Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 7, 2025
Abstract
Metal
single
atoms
(SA)‐support
interactions
inherently
exhibit
significant
electrochemical
activity,
demonstrating
potential
in
energy
catalysis.
However,
leveraging
these
to
modulate
electronic
properties
and
extend
application
fields
is
a
formidable
challenge,
demanding
in‐depth
understanding
quantitative
control
of
atomic‐scale
interactions.
Herein,
situ,
off‐axis
electron
holography
technique
utilized
directly
visualize
the
between
SAs
graphene
surface.
These
facilitate
formation
dispersed
nanoscale
regions
with
high
charge
density
are
highly
sensitive
external
electromagnetic
(EM)
fields,
resulting
controllable
dynamic
relaxation
processes
for
accumulation
restoration.
This
leads
customized
dielectric
relaxation,
which
difficult
achieve
current
band
engineering
methods.
Moreover,
behaviors
insensitive
elevated
temperatures,
having
characteristics
distinct
from
those
typical
metallic
or
semiconducting
materials.
Based
on
results,
programmable
EM
wave
absorption
achieved
by
developing
library
SA‐graphene
materials
precisely
controlling
SA‐support
tailor
their
responses
waves
terms
frequency
intensity.
advancement
addresses
anti‐EM
interference
requirements
components,
greatly
enhancing
development
integrated
circuits
micro‐nano
chips.
Future
efforts
will
concentrate
manipulating
atomic
SA‐support,
potentially
revolutionizing
nanoelectronics
optoelectronics.
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(30)
Опубликована: Июль 18, 2024
Rechargeable
zinc–air
batteries
(ZABs)
are
regarded
as
a
remarkably
promising
alternative
to
current
lithium-ion
batteries,
addressing
the
requirements
for
large-scale
high-energy
storage.
Nevertheless,
sluggish
kinetics
involving
oxygen
reduction
reaction
(ORR)
and
evolution
(OER)
hamper
widespread
application
of
ZABs,
necessitating
development
high-efficiency
durable
bifunctional
electrocatalysts.
Here,
we
report
atom–bridged
Fe,
Co
dual-metal
dimers
(FeOCo-SAD),
in
which
active
site
Fe–O–Co–N
6
moiety
boosts
exceptional
reversible
activity
toward
ORR
OER
alkaline
electrolytes.
Specifically,
FeOCo-SAD
achieves
half-wave
potential
(
E
1/2
)
0.87
V
an
overpotential
310
mV
at
density
10
mA
cm
–2
OER,
with
gap
(Δ
only
0.67
V.
Meanwhile,
manifests
high
performance
peak
power
241.24
mW
−2
realistic
rechargeable
ZABs.
Theoretical
calculations
demonstrate
that
introduction
bridge
dimer
induced
charge
spatial
redistribution
around
Fe
atoms.
This
enhances
activation
optimizes
adsorption/desorption
dynamics
intermediates.
Consequently,
energy
barriers
effectively
reduced,
leading
strong
promotion
intrinsic
OER.
work
suggests
oxygen-bridging
offer
prospects
significantly
enhancing
electrocatalysis
creating
innovative
catalysts
exhibit
synergistic
effects
electronic
states.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Авг. 12, 2024
Constructing
atom-pair
engineering
and
improving
the
activity
of
metal
single-atom
nanozyme
(SAzyme)
is
significant
but
challenging.
Herein,
we
design
Zn-SA/CNCl
SAzyme
by
simultaneously
constructing
Zn-N4
sites
as
catalytic
Zn-N4Cl1
regulator.
The
regulators
effectively
boost
peroxidase-like
activities
sites,
resulting
in
a
346-fold,
1496-fold,
133-fold
increase
maximal
reaction
velocity,
constant
efficiency,
compared
to
Zn-SA/CN
without
with
excellent
inhibits
tumor
cell
growth
vitro
vivo.
density
functional
theory
(DFT)
calculations
reveal
that
facilitate
adsorption
*H2O2
re-exposure
thus
improve
rate.
This
work
provides
rational
effective
strategy
for
engineering.
Designing
enhancing
performance
nanozymes
(SAzymes)
through
important
yet
difficult.
Here
authors
develop
concurrently
creating
regulators.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 7, 2025
Abstract
Metal
single
atoms
(SA)‐support
interactions
inherently
exhibit
significant
electrochemical
activity,
demonstrating
potential
in
energy
catalysis.
However,
leveraging
these
to
modulate
electronic
properties
and
extend
application
fields
is
a
formidable
challenge,
demanding
in‐depth
understanding
quantitative
control
of
atomic‐scale
interactions.
Herein,
situ,
off‐axis
electron
holography
technique
utilized
directly
visualize
the
between
SAs
graphene
surface.
These
facilitate
formation
dispersed
nanoscale
regions
with
high
charge
density
are
highly
sensitive
external
electromagnetic
(EM)
fields,
resulting
controllable
dynamic
relaxation
processes
for
accumulation
restoration.
This
leads
customized
dielectric
relaxation,
which
difficult
achieve
current
band
engineering
methods.
Moreover,
behaviors
insensitive
elevated
temperatures,
having
characteristics
distinct
from
those
typical
metallic
or
semiconducting
materials.
Based
on
results,
programmable
EM
wave
absorption
achieved
by
developing
library
SA‐graphene
materials
precisely
controlling
SA‐support
tailor
their
responses
waves
terms
frequency
intensity.
advancement
addresses
anti‐EM
interference
requirements
components,
greatly
enhancing
development
integrated
circuits
micro‐nano
chips.
Future
efforts
will
concentrate
manipulating
atomic
SA‐support,
potentially
revolutionizing
nanoelectronics
optoelectronics.
