Abstract
Li‐O
2
batteries
urgently
needs
high
discharge
capacity
and
stable
cycling
performance,
requiring
effective
reliable
bifunctional
catalysts
for
the
oxygen
reduction
reaction
(ORR)
evolution
(OER).
Herein,
Hovenia
acerba
Lindl
‐like
heterostructure
composed
of
cobalt
sulfide
tin
dioxide
supported
on
carbon
substrate
(CoS/SnO
@C)
is
prepared
via
CO
laser
irradiation
technology.
The
half‐wave
potential
CoS/SnO
@C
ORR
0.88
V,
while
overpotential
OER
at
10
mA
cm
−2
as
low
270
mV.
employing
catalyst
displays
a
specific
3332.25
mAh
g
−1
long
life
226
cycles.
Additionally,
theory
calculations
demonstrate
that
construction
decreases
energy
barrier
rate‐determining
step
(RDS)
both
OER.
Notably,
SnO
behaves
electronic
promoter
to
optimize
structure
interface
triggers
charge
redistribution
CoS,
which
weakens
adsorption
strength
*
O‐intermediates
allows
break
linear
scaling
relationship,
thus
further
enhancing
catalytic
performance
@C.
This
research
furnishes
directions
design
heterogeneous
catalysts,
highlighting
its
great
application
in
rechargeable
batteries.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 27, 2024
Abstract
Integrating
active
sites
for
oxygen
reduction
and
evolution
reactions
(ORR
OER)
is
pivotal
advancing
bifunctional
electrodes.
Addressing
the
geometric/electronic
properties
of
these
essential
to
disrupt
linear
scaling
relationship
between
adsorption
desorption
complex
intermediates.
Herein,
a
proof‐of‐concept
presented
constructing
asymmetric
trinuclear
employing
both
composition‐
size‐based
coupling
strategies.
These
comprise
ORR‐active
Fe
single
atom
(Fe
SA
),
OER‐active
atomically
clustered
species
AC
Ni
as
modulators.
This
AC‐SA
‐Ni
@N‐doped
carbon
exhibits
excellent
catalytic
activities,
with
narrow
potential
gap
0.661
V
an
ORR
half‐wave
0.931
OER
1.592
at
10
mA
cm
−2
.
The
Zn‐air
battery
this
material
achieves
peak
power
density
293
mW
,
specific
capacity
748
mAh
g
Zn
−1
remarkable
stability.
Experimental
findings
theoretical
simulations
reveal
that
induced
strong
electronic
among
centers,
facilitating
charge
redistribution
optimizing
barriers
enhances
rapid
release
*
OH
during
efficient
transformation
from
O
OOH
OER.
study
presents
novel
strategy
developing
robust
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Abstract
N‐doped
carbon
confined
alloy
catalysts
possess
considerable
potential
in
facilitating
oxygen
electrocatalytic
reaction
and
consequent
applications
metal
air
batteries,
but
the
sluggish
catalytic
kinetics
high
barrier
of
reduction
(ORR)
remain
bottleneck
restricting
its
further
development.
Here,
a
novel
CoFe‐NiFe
biphase
nanoheterojunction
encapsulated
within
nanotubes
(CoFe‐NiFe@NCNT)
is
fabricated
via
hydrothermal
carbothermic
approach.
Owing
to
plentiful
active
sites
electrical
conductance,
difference
between
OER
ORR
amounts
merely
0.68
V.
Simultaneously,
performance
Zn‐air
Mg‐air
batteries
assembled
by
CoFe‐NiFe@NCNT
serving
as
air‐cathode
are
superior
that
commercial
Pt/C
+
RuO
2
.
The
DFT
outcomes
reveal
transformation
*OOH
*O
rate‐determining
step
(RDS)
ORR/OER.
Also,
synergy
heterojunction
conducive
reduce
energy
barrier.
This
study
offers
profound
understanding
toward
structural
design
electrocatalysts
utilization
metal‐air
for
portable
wearable
electronic
apparatuses.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 9, 2025
Abstract
Understanding
the
oxygen
evolution
reaction
(OER)
mechanism
is
pivotal
for
improving
overall
efficiency
of
water
electrolysis.
Despite
methylammonium
lead
halide
perovskites
(MAPbX
3
)
have
shown
promising
OER
performance
due
to
their
soft‐lattice
nature
that
allows
lattice‐oxygen
oxidation
active
α‐PbO
2
layer
surface,
role
A‐site
MA
or
X‐site
elements
in
electrochemical
reconstruction
and
mechanisms
has
yet
be
explored.
Here,
it
demonstrated
perovskite@zeolite
composites
intrinsically
dominated
by
group
lead‐halide
perovskites,
while
type
halogen
crucial
kinetics
composites.
Using
CsPbBr
x
I
3‐
@AlPO‐5
(
=
0,
1,
2,
3)
as
a
model
catalyst,
found
behaves
oxygen‐intercalation
pseudocapacitance
during
surface
restructuring
absence
halogen‐ion
migration
phase
separation
,
achieving
larger
diffusion
rate
OH
−
within
core‐shell
structure.
Moreover,
distinct
from
single‐metal‐site
MAPbBr
@AlPO‐5,
experimental
theoretical
investigations
reveal
soft
lattice
triggers
oxygen‐vacancy‐site
via
/α‐PbO
interface,
resulting
excellent
performance.
Owing
variety
easy
tailoring
perovskite
compositions,
these
findings
pave
way
development
novel
catalysts
efficient
electrocatalysis.
Abstract
α‐FeOOH
is
a
promising
catalyst
for
oxygen
evolution
reaction
(OER).
However,
owing
to
the
high
spin
state
(HS,
t
2g
3
e
g
2
)
of
Fe
3+
in
typical
structure,
bonding
strength
oxygen‐containing
intermediates
are
usually
too
strong.
In
this
work,
successful
synthesis
intermediate
(IS)
structure
on
iron
foam
(IF)
by
introducing
Ni
atom
reported.
Refined
structural
analysis
and
theoretical
calculations
reveal
that
doped‐Ni
enlarged
d
orbital
splitting
energy,
thus
converting
crystal
field
stable
HS
state.
The
IS
optimized
adsorption
energy
reduced
barrier
rate‐determining
step
(RDS,
O*
OOH*).
Moreover,
doped
generation
4+
during
OER,
combined
with
amorphous
layer
formed
molten
salt
method,
inhibiting
dissolution
Fe.
as‐obtained
exhibited
excellent
OER
activity
an
overpotential
178
mV
at
10
mA
cm
−2
Tafel
slope
27
dec
−1
,
which
outperforms
those
state‐of‐the‐art
oxyhydroxides
catalysts.
paper,
fast
efficient
method
construction
low‐cost
high‐activity
iron‐based
provided.
