ChemPlusChem,
Journal Year:
2024,
Volume and Issue:
89(5)
Published: Jan. 24, 2024
Abstract
The
development
of
acid‐stable
oxygen
evolution
reaction
electrocatalysts
is
essential
for
high‐performance
acidic
water
electrolysis.
Herein,
we
report
the
results
one‐dimensional
(1D)
nanorods
(NRs)
IrCeMnO@Ir
containing
~20
wt
.
%
Iridium
(Ir)
as
an
efficient
anode
electrocatalyst,
synthesized
via
a
one‐step
cation
exchange
strategy.
Owing
to
presence
1D
channels
nanorod
architecture
and
unique
electronic
structure,
exhibited
69
folds
more
mass
activity
than
that
commercial
IrO
2
well
over
400
h
stability
with
only
20
mV
increase
in
overpotential.
DFT
calculations
control
experiments
demonstrated
CeO
serves
electron
buffer
accelerate
kinetics
rate‐determined
step
significantly
enhanced
suppress
over‐oxidation
Ir
species
their
dissolution
impressively
promoted
under
practical
conditions.
Our
work
opens
up
feasible
strategy
boost
OER
simultaneously.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 9, 2024
The
stability
and
catalytic
activity
of
acidic
oxygen
evolution
reaction
(OER)
are
strongly
determined
by
the
coordination
states
spatial
symmetry
among
metal
sites
at
catalysts.
Herein,
an
ultrafast
evaporation
technology
to
rapidly
soften
intrinsic
covalent
bonds
using
ultrahigh
electrical
pulses
is
suggested,
in
which
prospective
charged
excited
this
extreme
avalanche
condition
can
generate
a
strong
electron-phonon
coupling
evaporate
some
coordinated
(O)
atoms,
finally
leading
controllable
half-metallization
feature.
Simultaneously,
relative
(M)
site
arrays
be
orderly
locked
delineate
intriguing
atom-fingerprints
pyrochlore
catalysts,
where
coexistence
metallic
(M─M)
(M─O)
symmetry-breaking
configuration
partially
restrain
crystal
field
effect
particular
high-spin
occupied
state.
This
catalyst
effectively
optimize
spin-related
kinetics
OER,
giving
rise
10.3
times
(at
188
mV
overpotential)
reactive
than
pristine
pyrochlores.
work
provides
new
understanding
surfaces
accelerate
water
oxidation.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 15, 2024
Pyroptosis
is
an
inflammatory
form
of
programmed
cell
death
associated
with
the
immune
system
that
can
be
induced
by
reactive
oxygen
species
(ROS).
As
a
therapeutic
strategy
better
penetration
depth,
sonodynamic
therapy
(SDT)
expected
to
induce
pyroptosis
cancer
cells
and
boost
response.
However,
it
still
limited
problem
precisely
adjust
structure
sonosensitizers
exhibit
satisfactory
sono-catalytic
properties.
Herein,
fluorinated
titanium
oxide
(TiO2–xFx)
were
developed
under
ultrasound
(US)
antitumor
responses,
enabling
highly
effective
SDT.
On
one
hand,
introduction
F
atoms
significantly
reduced
adsorption
energy
TiO2–xFx
for
water,
which
conducive
occurrence
reactions.
other
process
replacing
O
increased
vacancies
sonosensitizer
shortened
band
gap,
enabled
powerful
ROS
generation
ability
US
stimulation.
In
this
case,
large
amounts
could
effectively
kill
inducing
mitochondrial
damage
disrupting
oxidative
homeostasis,
leading
significant
pyroptosis.
Moreover,
SDT
treatment
not
only
suppressed
tumor
proliferation
but
also
elicited
robust
memory
effects
hindered
recurrence.
This
work
highlighted
importance
regulating
achieve
efficient
pyroptosis,
sets
stage
further
development
SDT-immunotherapy.
