Angewandte Chemie,
Год журнала:
2023,
Номер
136(4)
Опубликована: Дек. 1, 2023
Abstract
Single‐atom
alloys
(SAAs),
combining
the
advantages
of
single‐atom
and
nanoparticles
(NPs),
play
an
extremely
significant
role
in
field
heterogeneous
catalysis.
Nevertheless,
understanding
catalytic
mechanism
SAAs
catalysis
reactions
remains
a
challenge
compared
with
single
atoms
NPs.
Herein,
ruthenium‐nickel
(RuNi
)
synthesized
by
embedding
atomically
dispersed
Ru
Ni
NPs
are
anchored
on
two‐dimensional
Ti
3
C
2
T
x
MXene.
The
RuNi
SAA‐3
−Ti
catalysts
exhibit
unprecedented
activity
for
hydrogen
evolution
from
ammonia
borane
(AB,
NH
BH
hydrolysis
mass‐specific
(r
mass
value
333
L
min
−1
g
.
Theoretical
calculations
reveal
that
anchoring
optimizes
dissociation
AB
H
O
as
well
binding
ability
H*
intermediates
during
due
to
d‐band
structural
modulation
caused
alloying
effect
metal‐supports
interactions
(MSI)
This
work
provides
useful
design
principles
developing
optimizing
efficient
hydrogen‐related
demonstrates
over
energy
Abstract
Developing
catalysts
with
suitable
adsorption
energy
for
oxygen‐containing
intermediates
and
elucidating
their
internal
structure‐performance
relationships
are
essential
the
commercialization
of
Li–O
2
batteries
(LOBs),
especially
under
high
current
densities.
Herein,
NiCo
O
4
‐CeO
heterostructure
a
spontaneous
built‐in
electric
field
(BIEF)
is
designed
utilized
as
cathode
catalyst
LOBs
at
density.
The
driving
mechanism
electron
pumping/accumulation
heterointerface
studied
via
experiments
density
functional
theory
(DFT)
calculations,
growth
discharge
products.
results
show
that
BIEF
induced
by
work
function
difference
optimizes
affinity
LiO
promotes
formation
nano‐flocculent
Li
,
thus
improving
performance
Specifically,
exhibits
large
capacity
(9546
mAh
g
−1
4000
mA
)
stability
(>430
cycles
),
which
better
than
majority
previously
reported
metal‐based
catalysts.
This
provides
new
method
tuning
nucleation
decomposition
inspires
design
ideal
to
operate
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(24), С. 14268 - 14301
Опубликована: Янв. 1, 2024
This
review
gives
a
global
map
of
HEMs
on
the
basis
metal
entities
from
noble
metals
to
cheap
transition
and
provide
meaningful
guidance
researchers
for
exploration
advanced
water
splitting.
To
achieve
a
long
cycle
life
and
high-capacity
performance
for
Li-O2
batteries,
it
is
critical
to
rationally
modulate
the
formation
decomposition
pathway
of
discharge
product
Li2O2.
Herein,
we
designed
highly
efficient
catalyst
containing
dual
catalytic
active
sites
Pt
single
atoms
(PtSAs)
paired
with
high-entropy
alloy
(HEA)
nanoparticles
oxygen
reduction
reaction
(ORR)
in
batteries.
HEA
moderate
d-band
center
enhance
surface
adsorbed
LiO2
intermediate
(LiO2(ads)),
while
PtSAs
exhibit
weak
adsorption
energy
promote
soluble
(LiO2(sol)).
An
optimal
ratio
between
LiO2(ads)
LiO2(sol)
was
realized
via
regulating
etching
conditions
dealloying
synthesis
process
obtaining
high-performance
The
ORR
kinetics
are
accelerated,
parasitic
reactions
restrained
As
result,
batteries
based
on
HEA@Pt-PtSAs
demonstrate
an
ultralow
overpotential
(0.3
V)
ultralong
cycling
470
cycles
at
1000
mA
g-1.
insights
into
synthetic
strategies
importance
balancing
pathways
will
offer
guidance
devising
multisite
synergistic
catalysts
accelerate
redox-reaction
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 28, 2025
It
is
desirable
for
lithium-oxygen
batteries
(LOBs)
to
fabricate
the
cathode
catalysts
with
high
catalytic
activity
and
stability.
High
entropy
oxide
(HEO)
sub-1
nm
nanowires
(SNWs)
nearly
100%
active
site
exposure
intrinsic
stability
are
doubtless
one
of
best
candidates.
Herein,
under
a
mild
solvothermal
condition,
by
incorporating
phosphomolybdic
acid
(PMA)
into
multimetal
reaction
system,
series
HEO-PMA
SNWs
successfully
prepared,
where
variety
metal
oxides
adjustable
from
mono
component
six
components.
When
these
as
applied
LOBs,
capacity
cycling
LOBs
steadily
improved
species
increasing
stepwise,
indicating
that
modulation
effect
plays
an
important
role
in
enhancing
battery
performance.
Additionally,
considering
difference
various
oxides,
performance
further
optimized
keeping
number
elements
constant
just
adjusting
kind
oxide.
Particularly,
BiCuFeCeWPtOx-PMA
based
delivers
(11206
mA
h
g-1)
excellent
213
cycles,
making
it
promising
electrocatalyst
candidate
LOBs.
ACS Nano,
Год журнала:
2024,
Номер
18(26), С. 16489 - 16504
Опубликована: Июнь 20, 2024
Lithium-oxygen
(Li-O2)
batteries
have
obtained
widespread
attention
as
next-generation
energy
storage
systems
due
to
their
extremely
high
density.
However,
the
charge
overpotential,
attributed
insulating
property
of
Li2O2,
significantly
limits
efficiency
and
triggers
solvent
degradation.
The
electrochemical
activities
oxygen
reduction
reactions
(ORR)
evolution
(OER)
on
cathode
are
crucial
for
alleviating
charging
polarizations
enhancing
lifetime
Li-O2
batteries,
which
also
top
challenges
state-of-art
research.
In
this
review,
scientific
proposed
solutions
in
development
catalysts
been
summarized.
recent
research
advancements
nanoengineering
comprehensively
discussed,
perspectives
structure
optimization
presented.
Meanwhile,
we
elucidated
structure-performance
relationship
between
electronic
state
performance
at
nanoscale
level.
This
review
intends
provide
guidelines
design
construction
advanced
batteries.
Batteries,
Год журнала:
2024,
Номер
10(8), С. 260 - 260
Опубликована: Июль 23, 2024
As
modern
society
continues
to
advance,
the
depletion
of
non-renewable
energy
sources
(such
as
natural
gas
and
petroleum)
exacerbates
environmental
issues.
The
development
green,
environmentally
friendly
storage
conversion
systems
is
imperative.
density
commercial
lithium-ion
batteries
approaching
its
theoretical
limit,
even
so,
it
struggles
meet
rapidly
growing
market
demand.
Lithium–oxygen
have
garnered
significant
attention
from
researchers
due
their
exceptionally
high
density.
However,
challenges
such
poor
electrolyte
stability,
short
cycle
life,
low
discharge
capacity,
overpotential
arise
sluggish
kinetics
oxygen
reduction
reaction
(ORR)
during
evolution
(OER)
charging.
This
article
elucidates
fundamental
principles
lithium–oxygen
batteries,
analyzes
primary
issues
currently
faced,
summarizes
recent
research
advancements
in
air
cathodes
anodes.
Additionally,
proposes
future
directions
efforts
for
lithium–air
batteries.
