Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(41)
Published: Aug. 17, 2024
Dual-atom
catalysts
(DACs)
with
atomically
dispersed
dual-sites,
as
an
extension
of
single-atom
(SACs),
have
recently
become
a
new
hot
topic
in
heterogeneous
catalysis
due
to
their
maximized
atom
efficiency
and
dual-site
diverse
synergy,
because
the
synergistic
diversity
dual-sites
achieved
by
asymmetric
microenvironment
tailoring
can
efficiently
boost
catalytic
activity
optimizing
electronic
structure
DACs.
Here,
this
work
first
summarizes
frequently-used
experimental
synthesis
characterization
methods
Then,
four
mechanisms
(cascade
mechanism,
assistance
co-adsorption
mechanism
bifunction
mechanism)
key
modulating
(active
site
strategy,
transverse/axial-modification
engineering,
distance
engineering
strain
engineering)
are
elaborated
comprehensively.
The
emphasis
is
placed
on
effects
DACs
oxygen/carbon
dioxide
reduction
reaction.
Finally,
some
perspectives
outlooks
also
addressed.
In
short,
review
useful
strategy
speed
up
high-performance
electrocatalysts
for
different
reactions.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 9, 2024
Abstract
Lithium‐sulfur
(Li–S)
batteries
are
facing
a
multitude
of
challenges,
mainly
pertaining
to
the
sluggish
sulfur
redox
kinetics
and
rampant
lithium
dendrite
growth
on
cathode
anode
side,
respectively.
In
this
sense,
MXene
has
shown
conspicuous
advantages
in
serving
as
dual‐functional
promotor
for
Li–S
throughout
morphologic
engineering,
but
still
suffers
from
poor
electrocatalytic
activity
insufficient
lithophilic
sites.
Herein,
atomically
dispersed
Co
sites
seeded
onto
size
effect‐enabled
V
2
C
spheres
(Co‐VC),
leading
generation
unique
coordination
configurations
rich
active
Electrochemical
tests
combined
with
synchrotron
radiation
X‐ray
3D
nano‐computed
tomography
theoretical
calculations
unravel
that
Co‐VC
optimal
environments
simultaneously
boost
reaction
nucleation.
As
consequence,
modified
separator
can
sustain
stable
operation
over
700
cycles
negligible
capacity
decay
at
1.0
C,
delivers
an
areal
9.0
mAh
cm
−2
desired
cyclic
performance
high
loading
7.6
mg
lean
electrolyte
dosage
4.0
µL
S
−1
0.1
C.
The
work
opens
new
avenue
boosting
atomic‐scale
site
design
aid
2D
substrates
toward
pragmatic
batteries.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(44)
Published: Aug. 8, 2024
Abstract
Dual‐atom
catalysts
(DACs)
are
promising
for
applications
in
electrochemical
CO
2
reduction
due
to
the
enhanced
flexibility
of
catalytic
sites
and
synergistic
effect
between
dual
atoms.
However,
precisely
controlling
atomic
distance
identifying
dual‐atom
configuration
DACs
optimize
performance
remains
a
challenge.
Here,
Ni
Fe
pairs
were
constructed
on
nitrogen‐doped
carbon
support
three
different
configurations:
NiFe‐isolate,
NiFe‐N
bridge,
NiFe‐bonding.
It
was
found
that
bridge
catalyst
with
NiN
4
FeN
sharing
two
N
atoms
exhibited
superior
activity
stability
when
compared
NiFe‐isolate
NiFe‐bonding
catalysts.
A
series
characterizations
density
functional
theory
calculations
suggested
N‐bridged
NiFe
an
appropriate
can
exert
more
pronounced
synergy.
not
only
regulated
suitable
adsorption
strength
*COOH
intermediate
but
also
promoted
desorption
*CO,
thus
accelerating
electroreduction
CO.
This
work
provides
important
implication
enhancement
catalysis
by
tailoring
coordination
structure
DACs,
identification
neighboring
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
Exploring
advanced
electrolysis
techniques
for
attaining
scene‐adaptive
and
on‐site
green
H
2
production
is
an
imperative
matter
of
utmost
practical
significance
but
grand
challenge
remains.
Herein,
drawn
inspiration
from
a
spontaneous
hydrazine‒H
O
galvanic
cell
configured
on
low‐valence
Ru
single
atoms‐loaded
Mo
C
electrode
(Ru
SA
/v‐Mo
C),
alternative
energy
solution
utilizing
self‐powered
electrochemical
hydrazine
splitting
(N
4
→
2H
+
N
)
instead
the
stereotyped
electricity‐consumed
water
proposed.
This
highlights
pH‐decoupled
primary
battery
with
notable
open‐circuit
voltage
1.37
V
density
up
to
358
Wh
g
N2H4
−1
,
which
powerfully
propels
alkaline
cell,
leading
bilateral
harvest
remarkable
rate
18
mol
h
m
−2
i.e.,
403.2
L
setting
new
record
self‐sustaining
electricity‐powered
systems.
The
success
this
further
decoded
by
tandem
theoretical
in
situ
spectroscopic
studies,
cross‐verifying
Ru‒Mo
dual‐site
synergy
streamlining
overall
barriers,
thereby
enhancing
kinetics
reactions.
pioneering
work,
showcasing
free
both
external
feedstock
inputs,
opens
horizon
way
ultimate
solution.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 9, 2025
Photo/electro-catalytic
CO2
reduction
into
high-value
products
are
promising
strategies
for
addressing
both
environmental
problems
and
energy
crisis.
Duo
to
their
advantageous
visible
light
absorption
ability,
adjustable
optic/electronic
properties,
definite
active
center,
post-modification
capability,
excellent
stability,
porphyrin-based
covalent
organic
frameworks
(COFs)
have
emerged
as
attractive
photo/electro-catalysts
towards
reduction.
In
this
review,
the
research
progress
of
COFs
photo/electro-catalytic
is
summarized
including
design
principles,
catalytic
performance,
reaction
mechanism.
addition,
review
also
presents
some
challenges
prospects
application
in
reduction,
laying
base
fundamental
efforts.
