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.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Jan. 2, 2024
Abstract
Although
the
acidic
oxygen
evolution
reaction
(OER)
plays
a
crucial
role
in
proton-exchange
membrane
water
electrolysis
(PEMWE)
devices,
challenges
remain
owing
to
lack
of
efficient
and
acid-stable
electrocatalysts.
Herein,
we
present
low-iridium
electrocatalyst
which
tensile-strained
iridium
atoms
are
localized
at
manganese-oxide
surface
cation
sites
(TS-Ir/MnO
2
)
for
high
sustainable
OER
activity.
In
situ
synchrotron
characterizations
reveal
that
TS-Ir/MnO
can
trigger
continuous
lattice
oxygen-mediated
(L-LOM)
mechanism.
particular,
L-LOM
process
could
substantially
boost
adsorption
transformation
H
O
molecules
over
vacancies
around
Ir
prevent
further
loss
inner
MnO
bulk
optimize
structural
integrity
catalyst.
Importantly,
resultant
PEMWE
device
fabricated
using
delivers
current
density
500
mA
cm
−2
operates
stably
200
h.
Applied Catalysis B Environment and Energy,
Journal Year:
2023,
Volume and Issue:
343, P. 123584 - 123584
Published: Dec. 1, 2023
The
electrocatalytic
process
of
water
splitting
offers
a
promising
approach
to
produce
sustainable
hydrogen.
However,
the
slow
kinetics
oxygen
evolution
reaction
(OER)
presents
notable
challenge,
especially
in
acidic
environment
proton
exchange
membrane
(PEM)
systems.
Despite
extensive
progress
made
catalyst
development
for
hydrogen
production
through
electrolysis
last
century,
significant
advancements
have
been
accomplished.
quest
OER
catalysts
that
possess
both
high
activity
and
stability,
while
also
being
affordable,
continues
be
challenging.
Currently,
Ru/Ir-based
electrocatalysts
are
only
practical
anode
available.
Therefore,
it
is
crucial
explore
feasible
strategies
enhance
performance
longevity
catalysts.
This
review
comprehensive
assessment
obstacles
prospective
Additionally,
underscores
areas
research
concentration,
providing
valuable
perspectives
future
endeavors
development.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(52)
Published: Nov. 9, 2023
Transition
metal
single
atom
electrocatalysts
(SACs)
with
metal-nitrogen-carbon
(M-N-C)
configuration
show
great
potential
in
oxygen
evolution
reaction
(OER),
whereby
the
spin-dependent
electrons
must
be
allowed
to
transfer
along
reactants
(OH-
/H2
O,
singlet
spin
state)
and
products
(O2
,
triplet
state).
Therefore,
it
is
imperative
modulate
M-N-C
enhance
spin-sensitive
OER
energetics,
which
however
remains
a
significant
challenge.
Herein,
we
report
local
field
distortion
induced
intermediate
low
transition
by
introducing
main-group
element
(Mg)
into
Fe-N-C
architecture,
decode
underlying
origin
of
enhanced
activity.
We
unveil
that,
large
ionic
radii
mismatch
between
Mg2+
Fe2+
can
cause
FeN4
in-plane
square
deformation,
triggers
favorable
from
(dxy2
dxz2
dyz1
dz21
2.96
μB
)
dyz2
0.95
),
consequently
regulate
thermodyna-mics
elementary
step
desired
Gibbs
free
energies.
The
as-obtained
Mg/Fe
dual-site
catalyst
demonstrates
superior
activity
an
overpotential
224
mV
at
10
mA
cm-2
electrolysis
voltage
only
1.542
V
overall
water
splitting,
outperforms
those
state-of-the-art
SACs.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Feb. 26, 2024
Abstract
Developing
efficient
and
economical
electrocatalysts
for
acidic
oxygen
evolution
reaction
(OER)
is
essential
proton
exchange
membrane
water
electrolyzers
(PEMWE).
Cobalt
oxides
are
considered
promising
non-precious
OER
catalysts
due
to
their
high
activities.
However,
the
severe
dissolution
of
Co
atoms
in
acid
media
leads
collapse
crystal
structure,
which
impedes
application
PEMWE.
Here,
we
report
that
introducing
acid-resistant
Ir
single
into
lattice
spinel
cobalt
can
significantly
suppress
keep
them
highly
stable
during
process.
Combining
theoretical
experimental
studies,
reveal
stabilizing
effect
induced
by
heteroatoms
exhibits
a
strong
dependence
on
distance
adjacent
atoms,
where
stability
continuously
improves
with
decreasing
distance.
When
reduces
about
0.6
nm,
present
no
obvious
degradation
over
60-h
test
OER,
suggesting
potential
practical
applications.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(12)
Published: Jan. 25, 2024
Singlet
oxygen
(1
O2
)
plays
a
significant
role
in
environmental
and
biomedical
disinfection
fields.
Electrocatalytic
processes
hold
great
potential
for
1
generation,
but
remain
challenging.
Herein,
facile
Ni
doping
converted
spin-state
transition
approach
is
reported
boosting
production.
Magnetic
analysis
theoretical
calculations
reveal
that
occupied
at
the
octahedral
site
of
Co3
O4
can
effectively
induce
low-to-high
transition.
The
high-spin
Ni-Co3
generate
appropriate
binding
strength
enhance
electron
transfer
between
Co
centers
with
intermediates,
thereby
improving
catalytic
activity
effective
generating
.
In
neutral
conditions,
1×106
CFU
mL-1
Gram-negative
ESBL-producing
Escherichia
coli
(E.
coli)
could
be
inactivated
by
system
within
5
min.
Further
antibacterial
mechanisms
indicate
lead
to
cell
membrane
damage
DNA
degradation
so
as
irreversible
death.
Additionally,
developed
inactivate
bacteria
from
wastewater
bioaerosols.
This
work
provides
an
strategy
designing
electrocatalysis
boost
generation
process.
iScience,
Journal Year:
2023,
Volume and Issue:
27(1), P. 108738 - 108738
Published: Dec. 19, 2023
High-purity
hydrogen
produced
by
water
electrolysis
has
become
a
sustainable
energy
carrier.
Due
to
the
corrosive
environments
and
strong
oxidizing
working
conditions,
main
challenge
faced
acidic
oxidation
is
decrease
in
activity
stability
of
anodic
electrocatalysts.
To
address
this
issue,
efficient
strategies
have
been
developed
design
electrocatalysts
toward
OER
with
excellent
intrinsic
performance.
Electronic
structure
modification
achieved
through
defect
engineering,
doping,
alloying,
atomic
arrangement,
surface
reconstruction,
constructing
metal-support
interactions
provides
an
effective
means
boost
OER.
Based
on
introducing
mechanism
commonly
present
environments,
review
comprehensively
summarizes
for
regulating
electronic
catalytic
materials.
Finally,
several
promising
research
directions
are
discussed
inspire
synthesis
high-performance
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 23, 2024
Abstract
Inefficient
active
site
utilization
of
oxygen
evolution
reaction
(OER)
catalysts
have
limited
the
energy
efficiency
proton
exchange
membrane
(PEM)
water
electrolysis.
Here,
an
atomic
grid
structure
is
demonstrated
composed
high‐density
Ir
sites
(≈10
atoms
per
nm
2
)
on
reactive
MnO
2–x
support
which
mediates
coverage‐enhanced
OER
process.
Experimental
characterizations
verify
low‐valent
Mn
species
with
decreased
coordination
in
exert
a
pivotal
impact
enriched
coverage
surface
during
process,
and
distributed
grids,
where
highly
electrophilic
Ir─O
(II‐δ)−
bonds
proceed
rapidly,
render
intense
nucleophilic
attack
radicals.
Thereby,
this
metal‐support
cooperation
achieves
ultra‐low
overpotentials
166
mV
at
10
mA
cm
−2
283
500
,
together
striking
mass
activity
380
times
higher
than
commercial
IrO
1.53
V.
Moreover,
its
high
performance
also
markedly
surpasses
black
catalyst
PEM
electrolyzers
long‐term
stability.
Advanced Materials Interfaces,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 25, 2025
Abstract
This
review
highlights
recent
advancements
in
enhancing
oxygen
evolution
reaction
kinetics
through
the
design
of
single‐atom
catalysts.
By
leveraging
unique
properties
catalysts
(SACs),
including
high
atom
utilization
and
tunable
electronic
structures,
researchers
have
developed
with
superior
activity
stability
for
(OER).
Key
strategies
SACs
design,
such
as
support
selection,
coordination
environment,
doping
effects
are
discussed,
while
also
examining
role
advanced
characterization
techniques
elucidating
catalytic
mechanisms.
Finally,
future
directions
challenges
field
outlined
to
guide
development
next‐generation
OER
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(19)
Published: March 5, 2024
Abstract
We
have
synthesized
a
quinone‐incorporated
bistriarylamine
donor‐acceptor‐donor
(D–A–D)
semiconductor
1
by
B(C
6
F
5
)
3
(BCF)
catalyzed
C−H/C−H
cross
coupling
via
radical
ion
pair
intermediates.
Coordination
of
Lewis
acids
BCF
and
Al(OR
(R
=C(CF
to
the
afforded
diradical
zwitterions
2
integer
electron
transfer.
Upon
binding
acids,
LUMO
energy
is
significantly
lowered
band
gap
narrowed
from
1.93
eV
(
1.01
1.06
).
are
rare
near‐infrared
(NIR)
dyes
with
broad
absorption
both
centered
around
1500
nm.
By
introducing
photo
generator,
can
be
generated
light‐dependent
control.
Furthermore,
transfer
process
also
reversibly
regulated
addition
CH
CN.
In
addition,
temperature
sharply
increased
reached
as
high
110
°C
in
10
s
upon
irradiation
near‐infrared‐II
(NIR‐II)
laser
(1064
nm,
0.7
W
cm
−2
),
exhibiting
fast
response
laser.
It
displays
excellent
photothermal
stability
(PT)
conversion
efficiency
62.26
%
high‐quality
PT
imaging.
