Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 22, 2024
Abstract
Rare
earth
(RE)‐based
perovskites
are
considered
as
promising
platform
for
oxygen
evolution
reaction
(OER)
due
to
their
low
cost
and
tunable
structures.
However,
the
systematic
synthesis
of
perovskite
catalysts
with
satisfactory
performance
has
rarely
been
reported.
Herein,
a
general
synthetic
protocol
RE‐substituted
LaCoO
3
(RE‐LCO)
is
demonstrated.
Particularly,
after
loaded
RuO
2
,
as‐prepared
:0.2Ce‐LCO
hybrid
structures
exhibit
OER
overpotential
135
mV
at
10
mA
cm
−2
in
1.0
m
KOH,
together
remarkable
long‐term
operation,
representing
one
most
efficient
robust
Ru‐based
catalysts.
Comprehensive
experimental
results
indicate
that
enhanced
mechanism
attributed
Ce‐substitution,
which
alters
geometric
configuration
CoO
6
octahedra
generates
more
vacancies.
Furthermore,
interaction
between
Ce‐LCO
stabilizes
valence
state
Ru
site.
Theoretical
calculations
corroborate
Co
3d
orbitals
overlap
Ce
4f
near
Fermi
level,
greatly
improving
electron
transfer
atoms.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: Oct. 18, 2023
2D
MXene
(Ti3CNTx)
has
been
considered
as
the
most
promising
electrode
material
for
flexible
supercapacitors
owing
to
its
metallic
conductivity,
ultra-high
capacitance,
and
excellent
flexibility.
However,
it
suffers
from
a
severe
restacking
problem
during
fabrication
process,
limiting
ion
transport
kinetics
accessibility
of
ions
in
electrodes,
especially
direction
normal
surface.
Herein,
we
report
NH3-induced
situ
etching
strategy
fabricate
3D-interconnected
porous
MXene/carbon
dots
(p-MC)
films
high-performance
supercapacitor.
The
pre-intercalated
carbon
(CDs)
first
prevent
expose
more
inner
electrochemical
active
sites.
partially
decomposed
CDs
generate
NH3
nanosheets
toward
p-MC
films.
Benefiting
structural
merits
ionic
transmission
channels,
film
electrodes
achieve
gravimetric
capacitance
(688.9
F
g-1
at
2
A
g-1)
superior
rate
capability.
Moreover,
optimized
is
assembled
into
an
asymmetric
solid-state
supercapacitor
with
high
energy
density
cycling
stability,
demonstrating
great
promise
practical
applications.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Nov. 1, 2023
Transition
metal
oxides
are
promising
electrocatalysts
for
zinc-air
batteries,
yet
surface
reconstruction
caused
by
the
adsorbate
evolution
mechanism,
which
induces
zinc-ion
battery
behavior
in
oxygen
reaction,
leads
to
poor
cycling
performance.
In
this
study,
we
propose
a
lattice
mechanism
involving
proton
acceptors
overcome
performance
of
OER
process.
We
introduce
stable
solid
base,
hydroxy
BaCaSiO4,
onto
surfaces
PrBa0.5Ca0.5Co2O5+δ
perovskite
nanofibers
with
one-step
exsolution
strategy.
The
HO-Si
sites
on
BaCaSiO4
significantly
accelerate
transfer
from
OH*
adsorbed
during
As
proof
concept,
rechargeable
assembled
composite
electrocatalyst
is
an
alkaline
environment
over
150
hours
at
5
mA
cm-2
galvanostatic
charge/discharge
tests.
Our
findings
open
new
avenues
designing
efficient
batteries.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(27)
Published: April 16, 2024
Abstract
In
the
Fenton‐like
reaction,
revealing
dynamic
evolution
of
active
sites
is
crucial
to
achieve
activity
improvement
and
stability
catalyst.
This
study
reports
a
perovskite
oxide
in
which
atomic
(Co
0
)
situ
embedded
exsolution
occurs
during
high‐temperature
phase
transition.
unique
anchoring
strategy
significantly
improves
Co
3+
/Co
2+
cycling
efficiency
at
interface
inhibits
metal
leaching
peroxymonosulfate
(PMS)
activation.
The
Co@L‐PBMC
catalyst
exhibits
superior
PMS
activation
ability
could
99%
degradation
tetracycline
within
5
min.
combination
experimental
characterization
density
functional
theory
(DFT)
calculations
elucidates
that
electron‐deficient
oxygen
vacancy
accepts
an
electron
from
3d‐orbital,
resulting
significant
delocalization
site,
thereby
facilitating
adsorption
*HSO
/*OH
intermediate
onto
“metal‐V
O
bridge”
structure.
work
provides
insights
into
mechanism
level,
will
guide
rational
design
next‐generation
catalysts
for
environmental
remediation.
Accounts of Chemical Research,
Journal Year:
2024,
Volume and Issue:
57(6), P. 895 - 904
Published: March 1, 2024
ConspectusHydrogen
spillover,
as
a
well-known
phenomenon
for
thermal
hydrogenation,
generally
involves
the
migration
of
active
hydrogen
on
surface
metal-supported
catalysts.
For
thermocatalytic
spillover
takes
place
from
metals
with
superiority
dissociating
molecules
to
supports
strong
adsorption
under
H
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: April 30, 2024
Durable
and
efficient
bi-functional
catalyst,
that
is
capable
of
both
oxygen
evolution
reaction
hydrogen
under
acidic
condition,
are
highly
desired
for
the
commercialization
proton
exchange
membrane
water
electrolysis.
Herein,
we
report
a
robust
L-Ru/HfO
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(24)
Published: April 2, 2024
Abstract
The
pursuit
of
efficient
and
durable
bifunctional
electrocatalysts
for
overall
water
splitting
in
acidic
media
is
highly
desirable,
albeit
challenging.
SrIrO
3
based
perovskites
are
electrochemically
active
oxygen
evolution
reaction
(OER),
however,
their
inert
activities
toward
hydrogen
(HER)
severely
restrict
the
practical
implementation
splitting.
Herein,
an
Ir@SrIrO
heterojunction
newly
developed
by
a
partial
exsolution
approach,
ensuring
strong
metal‐support
interaction
OER
HER.
Notably,
‐175
electrocatalyst,
prepared
annealing
5%
H
2
atmosphere
at
175
°C,
delivers
ultralow
overpotentials
229
mV
10
mA
cm
−2
28
HER,
surpassing
most
recently
reported
electrocatalysts.
Moreover,
electrolyzer
using
electrocatalyst
demonstrates
potential
application
prospect
with
high
electrochemical
performance
excellent
durability
environment.
Theoretical
calculations
unveil
that
constructing
regulates
interfacial
electronic
redistribution,
ultimately
enabling
low
energy
barriers
both
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(40), P. 27486 - 27498
Published: Aug. 28, 2024
The
improvement
of
hydrogen
evolution
reaction
kinetics
can
be
largely
accelerated
by
introducing
a
well-designed
spillover
pathway
into
the
catalysts.
However,
driving
force
and
mechanism
migration
on
surface
catalysts
are
poorly
understood
rarely
explored
in
depth.
Here,
inspired
specific
ferroelectric
property
HfO
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
17(13)
Published: Feb. 16, 2024
Abstract
Ongoing
research
to
develop
advanced
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
is
needed
address
demand
efficient
energy
conversion
and
carbon‐free
sources.
In
OER
process,
acidic
electrolytes
have
higher
proton
concentration
faster
response
than
alkaline
ones,
but
their
harsh
strongly
environment
requires
catalysts
with
greater
corrosion
oxidation
resistance.
At
present,
iridium
oxide
(IrO
2
)
its
strong
stability
excellent
catalytic
performance
catalyst
of
choice
anode
side
commercial
PEM
electrolysis
cells.
However,
scarcity
high
cost
(Ir)
unsatisfactory
activity
IrO
hinder
industrial
scale
application
sustainable
development
technology.
This
highlights
importance
further
on
Ir‐based
catalysts.
this
review,
recent
advances
in
are
summarized,
including
fundamental
understanding
mechanism,
insights
into
catalysts,
highly
electrocatalysts,
common
strategies
optimizing
The
future
challenges
prospects
developing
effective
also
discussed.