Mechanistic
understanding
of
how
electrode-electrolyte
interfaces
evolve
dynamically
is
crucial
for
advancing
water-electrolysis
technology,
especially
the
restructuring
catalyst
surface
during
complex
electrocatalytic
reactions.
However,
perovskite
fluorides,
mechanistic
exploration
influence
dynamic
on
their
chemical
property
and
catalytic
mechanism
unclear
due
to
poor
conductivity
that
makes
definition
electrocatalyst
structure
difficult.
Herein,
oxygen
evolution
reaction
(OER),
various
operando
characterizations
are
employed
investigate
structure-activity
relationships
KNi
Oil
spill
pollution
poses
a
severe
environmental
threat,
necessitating
the
development
of
efficient
and
sustainable
remediation
strategies.
In
this
study,
we
designed
synthesized
series
pH-responsive
phase-selective
organogelators
(pRPSOGs)
based
on
d-gluconic
acetal
derivatives
with
long-chain
amine
groups
to
selectively
solidify
oil
in
oil/water
mixtures,
facilitating
its
rapid
removal
recovery.
The
gelation
behavior,
capability,
pH-switchable
properties
pRPSOGs
were
systematically
investigated
by
using
inversion
tests,
rheological
analysis,
Fourier
transform
infrared
spectroscopy,
X-ray
diffraction,
small-angle
scattering.
Molecular
simulations
further
conducted
elucidate
self-assembly
mechanism
gelators.
optimized
gelator,
A12,
exhibited
excellent
thermal
stability
mechanical
strength,
ensuring
structural
integrity
during
Importantly,
property
A12
allowed
for
reversible
solubility
modulation,
enabling
separation
recovery
both
gelator
phase
without
need
energy-intensive
distillation.
This
innovative
strategy
provided
reusable,
energy-efficient,
environmentally
friendly
approach
treatment,
offering
promising
applications
large-scale
remediation.
Abstract
The
exploration
of
efficient,
robust,
and
low‐cost
bifunctional
electrocatalysts
to
drive
the
commercial
application
Zn‐air
batteries
(ZABs)
is
great
significance
but
still
remains
a
challenge.
Herein,
1D
coordination
polymer
(1D‐CP)
derived
FeNi
alloy
&
Co
nanoparticles
(NPs)
co‐implanted
N‐doped
carbon
nanosheets
(FNC/NCS)
judiciously
crafted
employed
as
high‐performance
electrocatalyst
for
ultralong
lifetime
ZABs.
key
this
strategy
leveraging
metal‐coordinated
melamine
direct
pyrolysis
1D‐CP,
enabling
in
situ
formation
well‐dispersed
NPs
within
matrix.
resulting
FNC/NCS
exhibits
prominent
oxygen
reduction
reaction
(ORR)
evolution
(OER)
activity
with
small
overall
potential
difference
(ΔE
=
0.68
V).
Density
functional
theory
(DFT)
simulation
demonstrates
that
synergistic
effect
between
can
reduce
energy
barriers,
promote
electron
transfer,
optimize
crucial
intermediates,
thereby
largely
boost
ORR/OER
FNC/NCS.
FNC/NCS‐assembled
ZABs
possess
high
specific
capacity,
large
power
density,
cycling
life
both
aqueous
(>
3300
h)
solid‐state
(150
electrolytes.
This
work
provides
viable
1D‐CP‐derived
dissects
different
metal
species,
affording
significant
guidance
development
renewable
materials.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 20, 2024
Fluorination
has
been
proven
to
be
an
effective
strategy
boost
catalysts'
OER
performance
by
significantly
reducing
overpotential
and
the
Tafel
slope
while
enhancing
stability.
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.
Materials Chemistry Frontiers,
Год журнала:
2024,
Номер
9(2), С. 325 - 338
Опубликована: Ноя. 20, 2024
Image
illustrates
the
electrochemical
reconfiguration
behavior
occurring
on
surface
of
simulated
high-entropy
alloy
catalysts
during
electrocatalytic
oxygen
evolution
reaction
(OER)
in
alkaline
medium.
Abstract
Nickel‐based
electrocatalysts
are
promising
for
industrial
water
electrolysis,
but
the
dense
hydroxyl
oxide
layer
formed
during
oxygen
evolution
reaction
(OER)
limits
active
sites
accessibility
and
presents
challenges
in
balancing
structural
stability
with
effective
charge
transfer.
Based
on
this,
an
efficient
situ
leaching
strategy
is
proposed
to
construct
grain
boundary‐rich
catalyst
structure
high
transfer
ability
a
deep
catalytic
reached
>200‐nm.
Under
OER
conditions,
stable
sub‐nano
Ni
3
Al
particles
embedded
Ni(Fe)OOH,
originating
from
out
unstable
2
phase
of
initial
/Ni
alloy
doped
Fe.
The
evolutions
characterized
using
Raman
spectroscopy,
transmission
electron
microscopy,
X‐ray
absorption
spectroscopy.
exhibits
exemplary
performance,
evidenced
by
low
overpotential
212
mV
at
10
mA
cm
−2
,
minimal
Tafel
slope
25.0
dec
−1
.
maintains
>500
h
500
under
conditions.
Furthermore,
its
performance
seawater
electrolysis
notably
superior,
exhibiting
223
37.5
activity
porous
phases
provides
new
method
engineering
high‐performance
catalysts.
