Abstract
In
recent
years,
single‐atom
catalysts
(SACs)
with
separated
active
centers
and
high
atom
utilization
have
grown
significantly
as
a
significant
area
of
catalytic
research.
applications,
SACs
various
kinds
demonstrated
exceptional
performance,
so
the
study
mechanism
provides
clearer
direction
for
preparation
performance.
Strong
linkages
between
single
atoms
support
are
necessary
to
overcome
tendency
aggregate
into
clusters,
which
is
called
metal‐support
interaction
(MSI).
MSI
affects
not
only
stability
individual
atoms,
but
also
nature
binding
site
applicable
reactions.
Therefore,
investigating
connection
crucial.
This
work
describes
latest
developments
in
means
activity
modulation
catalysis.
First,
synthesis
strategies
presented,
including
ALD,
co‐deposition,
impregnation,
on.
Second,
mechanisms
realized
by
using
loading
different
types
supports
highlighted.
Third,
discussed,
heterojunction
strategy,
ligand
environment
dual‐single‐atom
strategy.
Finally,
possible
directions
future
development
catalysis
suggested.
Nano-Micro Letters,
Год журнала:
2024,
Номер
16(1)
Опубликована: Июль 9, 2024
Combining
single
atoms
with
clusters
or
nanoparticles
is
an
emerging
tactic
to
design
efficient
electrocatalysts.
Both
synergy
effect
and
high
atomic
utilization
of
active
sites
in
the
composite
catalysts
result
enhanced
electrocatalytic
performance,
simultaneously
provide
a
radical
analysis
interrelationship
between
structure
activity.
In
this
review,
recent
advances
single-atomic
site
coupled
are
emphasized.
Firstly,
synthetic
strategies,
characterization,
dynamics
types
clusters/nanoparticles
introduced,
then
key
factors
controlling
discussed.
Next,
several
clean
energy
catalytic
reactions
performed
over
synergistic
illustrated.
Eventually,
encountering
challenges
recommendations
for
future
advancement
energy-transformation
electrocatalysis
outlined.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(46)
Опубликована: Июнь 19, 2024
Abstract
Simultaneously
improving
activity
and
stability
is
a
crucial
yet
challenge
in
the
development
of
metallic
single‐atom‐based
catalysts.
In
current
work,
novel
approach
introduced
to
address
this
issue
by
combining
post‐adsorption
secondary
pyrolysis
techniques
create
synergistic
catalytic
system,
which
single
atoms
(SAs)
Fe
sites
played
NC
matrix
(Fe─NC)
are
coupled
with
high‐entropy
atomic
clusters
(HEACs).
Theoretical
calculations
reveal
that
incorporation
HEACs
lead
rehybridization
3d
orbital
configuration
Fe‐N
4
,
helps
balance
adsorption/desorption
energy
oxygenated
intermediates.
situ
spectroscopy
further
reveals
rate‐limiting
step
OH
*
desorption
on
HEAC/Fe─NC
oxygen
reduction
reaction
(ORR)
more
facile
compared
Fe─NC,
implying
higher
ORR
activity.
Moreover,
effect
diffusion
activation
barriers
entropy
contributes
structural
HEAC/Fe─NC,
resulting
remarkable
durability.
Consequently,
unique
catalyst
exhibits
half‐wave
potentials
0.927
0.828
V
an
aqueous
solution
KOH
(0.1
m
)
HClO
),
respectively,
along
excellent
The
findings
propose
strategy
for
modulating
electronic
structure
SAs
catalysts
enhancing
their
through
strong
interactions
between
HEACs.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(52)
Опубликована: Авг. 27, 2024
Abstract
The
integration
of
atom
clusters
and
single
atoms
into
a
unified
system
represents
desirable
approach
for
attaining
enhanced
catalytic
performance.
Nonetheless,
the
controllable
synthesis
single‐atom
nanocluster
integrated
(SA‐NC)
faces
considerable
challenges,
mechanisms
underlying
activity
remain
poorly
understood.
In
this
research,
cobalt‐based
catalyst
containing
both
coordinatively
unsaturated
(CoN
3
)
small
nanoclusters
(Co@SA‐NC)
is
synthesized.
Co@SA‐NC
not
only
facilitates
charge
mass
transfer
due
to
interconnected
long‐range
micromorphology,
thus
endowing
efficient
oxygen
electrocatalytic
reaction
(ORR/OER),
but
also
undergoes
surface
reconfiguration
upon
OH
adsorption
at
high
potentials
in
alkaline
ORR/OER
conditions.
More
appealingly,
OH‐involved
reconfigured
adaptive
structure
promotes
optimization
energy
barriers
owing
dynamic
regulation
from
bridged
between
Co
cluster
whole
process.
Specific
application
metrics,
zinc–air
battery
assembled
using
exhibit
targeted
power
density
enhancement
with
270
mW
cm
−2
an
medium.
This
work
offers
effective
insight
study
SA‐NC
pathways
catalysis.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 26, 2024
Abstract
Oxygen
electrochemistry,
which
encompasses
the
oxygen
reduction
reaction
(ORR)
and
evolution
(OER),
is
of
utmost
importance
in
energy‐related
reactions
such
as
zinc‐air
batteries
(ZABs).
However,
due
to
their
four‐electron
transfer
process,
these
are
still
significantly
restricted
by
sluggish
kinetics.
Supporting
atomically‐dispersed
(AD)
catalyst
or
metal
nanoparticles
(NPs)
on
nitrogen‐doped
carbon
(NC)
proven
be
an
effective
strategy
for
enhancing
performance
electrocatalysis.
Nevertheless,
types
catalysts
fails
meet
critical
requirements
ZABs.
Herein,
a
novel
Fe
AD
Co
NPs
@NC,
consists
both
Fe‐N
1
sites
lattice,
developed.
Spectroscopy
studies
density
functional
theory
calculations
indicate
that
site
lattice
facilitates
conversion
amorphous
CoOOH,
serves
main
active
ORR.
@NC
demonstrates
remarkable
activity
OER
When
it
used
air‐electrode
ZABs,
power
247.49
mW
cm
−2
.
This
work
presents
simple
yet
efficient
method
enhance
electrochemical
through
synergy
between
NPs.
