Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 14, 2025
Recently,
cobalt-based
oxides
have
received
considerable
attention
as
an
alternative
to
expensive
and
scarce
iridium
for
catalyzing
the
oxygen
evolution
reaction
(OER)
under
acidic
conditions.
Although
reported
materials
demonstrate
promising
durability,
they
are
not
entirely
intact,
calling
fundamental
research
efforts
understand
processes
governing
degradation
of
such
catalysts.
To
this
end,
work
studies
dissolution
mechanism
a
model
Co3O4
porous
catalyst
different
electrochemical
conditions
using
online
inductively
coupled
plasma
mass
spectrometry
(online
ICP-MS),
identical
location
scanning
transmission
electron
microscopy
(IL-STEM),
differential
(DEMS).
Despite
high
thermodynamics
tendency
reflected
in
Pourbaix
diagram,
it
is
shown
that
cobalt
kinetics
sluggish
can
be
lowered
further
by
modifying
protocol.
For
latter,
identified
study,
several
(electro)chemical
pathways
lead
must
considered.
Hence,
uncovers
transient
character
provides
valuable
insights
help
stability
already
published
works
facilitate
knowledge-driven
design
novel,
stable,
abundant
catalysts
toward
OER
environment.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(10), P. 6846 - 6855
Published: Feb. 29, 2024
This
investigation
probes
the
intricate
interplay
of
catalyst
dynamics
and
reaction
pathways
during
oxygen
evolution
(OER),
highlighting
significance
atomic-level
local
ligand
structure
insights
in
crafting
highly
active
electrocatalysts.
Leveraging
a
tailored
ion
exchange
followed
by
electrochemical
dynamic
reconstruction,
we
engineered
novel
catalytic
featuring
single
Ir
atoms
anchored
to
NiOOH
(Ir1@NiOOH).
approach
involved
strategic
replacement
Fe
with
Ir,
facilitating
transition
selenide
precatalysts
into
(oxy)hydroxides.
elemental
substitution
promoted
an
upward
shift
O
2p
band
intensified
metal–oxygen
covalency,
thereby
altering
OER
mechanism
toward
enhanced
activity.
The
from
single-metal
site
(SMSM)
dual-metal-site
(DMSM)
Ir1@NiOOH
was
substantiated
situ
differential
mass
spectrometry
(DEMS)
supported
theoretical
insights.
Remarkably,
electrode
exhibited
exceptional
electrocatalytic
performance,
achieving
overpotentials
as
low
142
308
mV
at
current
densities
10
1000
mA
cm–2,
respectively,
setting
new
benchmark
for
electrocatalysis
OER.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: June 11, 2024
Abstract
Precisely
modulating
the
Ru-O
covalency
in
RuO
x
for
enhanced
stability
proton
exchange
membrane
water
electrolysis
is
highly
desired.
However,
transition
metals
with
d
-valence
electrons,
which
were
doped
into
or
alloyed
,
are
inherently
susceptible
to
influence
of
coordination
environment,
making
it
challenging
modulate
a
precise
and
continuous
manner.
Here,
we
first
deduce
that
introduction
lanthanide
gradually
changing
electronic
configurations
can
continuously
owing
shielding
effect
5
s
/5
p
orbitals.
Theoretical
calculations
confirm
durability
Ln-RuO
following
volcanic
trend
as
function
covalency.
Among
various
Er-RuO
identified
optimal
catalyst
possesses
35.5
times
higher
than
2
.
Particularly,
-based
device
requires
only
1.837
V
reach
3
A
cm
−2
shows
long-term
at
500
mA
100
h
degradation
rate
mere
37
μV
−1
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(21)
Published: March 19, 2024
Abstract
The
generation
of
green
hydrogen
by
water
splitting
is
identified
as
a
key
strategic
energy
technology,
and
proton
exchange
membrane
electrolysis
(PEMWE)
one
the
desirable
technologies
for
converting
renewable
sources
into
hydrogen.
However,
harsh
anode
environment
PEMWE
oxygen
evolution
reaction
(OER)
involving
four‐electron
transfer
result
in
large
overpotential,
which
limits
overall
efficiency
production,
thus
efficient
electrocatalysts
are
needed
to
overcome
high
overpotential
slow
kinetic
process.
In
recent
years,
noble
metal‐based
(e.g.,
Ru/Ir‐based
metal/oxide
electrocatalysts)
have
received
much
attention
due
their
unique
catalytic
properties,
already
become
dominant
acidic
OER
process
applied
commercial
devices.
these
still
face
thorny
problem
conflicting
performance
cost.
this
review,
first,
metal
briefly
classified
according
forms
existence,
mechanisms
outlined.
Then,
focus
on
summarizing
improvement
strategies
with
respect
activity
stability
over
years.
Finally,
challenges
development
prospects
discussed.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(5), P. 3298 - 3307
Published: Feb. 15, 2024
The
discovery
of
acid-stable
and
highly
active
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
is
crucial
in
quest
high-performance
water-splitting
technologies.
Herein,
a
heterostructured
RuO2–CeO2
electrocatalyst
was
constructed
by
using
lattice-matching
strategy.
interfacial
Ru–O–Ce
bridge
structure
provided
channel
electron
transfer
between
Ru
Ce,
creating
lattice
stress
that
distorts
local
RuO2.
resulting
catalyst
exhibited
attractive
stability
with
negligible
decay
after
1000
h
OER
0.5
M
H2SO4,
along
high
activity
an
overpotential
only
180
mV
at
10
mA
cm–2.
In
situ
attenuated
total
reflectance
surface-enhanced
infrared
absorption
spectroscopy
(ATR-SEIRAS),
differential
electrochemical
mass
spectrometry
(DEMS),
density
functional
theory
(DFT)
calculations
were
used
to
reveal
interface
noninterface
RuO2
sites
enabled
oxide
path
mechanism
(OPM)
enhanced
adsorbate
(AEM-plus),
respectively,
during
OER.
simultaneous
independent
pathways
accessible
matching
guides
improved
design
acidic
media.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(32)
Published: March 25, 2024
Abstract
Understanding
of
fundamental
mechanism
and
kinetics
the
oxygen
evolution
reaction
(OER)
is
pivotal
for
designing
efficient
OER
electrocatalysts
owing
to
its
key
role
in
electrochemical
energy
conversion
devices.
In
past
few
years,
lattice
oxidation
(LOM)
arising
from
anodic
redox
chemistry
has
attracted
significant
attention
as
it
involves
a
direct
O─O
coupling
thus
bypasses
thermodynamic
limitations
traditional
adsorbate
(AEM).
Transition
metal‐based
oxyhydroxides
are
generally
acknowledged
real
catalytic
phase
alkaline
media.
particular,
their
low‐dimensional
layered
structures
offer
sufficient
structural
flexibility
trigger
LOM.
Herein,
comprehensive
overview
provided
recent
advances
anion
LOM‐based
electrocatalysts.
Based
on
analyses
electronic
structure
LOM,
strategy
proposed
activate
Possible
identification
techniques
corroboration
also
reviewed.
addition,
reconstruction
process
induced
by
LOM
focused
importance
multiple
situ/operando
characterizations
highlighted
unveil
chemical
origins
To
conclude,
prospect
remaining
challenges
future
opportunities
presented.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(15), P. 8796 - 8804
Published: Jan. 1, 2024
The
development
of
non-precious
metal
electrocatalysts
for
acidic
oxygen
evolution
reaction
(OER)
that
are
highly
durable,
cost-effective,
and
efficient
is
crucial
to
advancing
the
use
proton
exchange
membrane
water
electrolyzers
(PEMWEs).
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(36)
Published: June 15, 2024
Although
Ru-based
materials
are
among
the
outstanding
catalysts
for
oxygen
evolution
reaction
(OER),
instability
issue
still
haunts
them
and
impedes
widespread
application.
The
of
OER
is
generally
ascribed
to
formation
soluble
species
through
over-oxidation
Ru
structural
decomposition
caused
by
involvement
lattice
oxygen.
Herein,
an
effective
strategy
selectively
activating
around
site
proposed
improve
activity
stability.
Our
synthesized
spinel-type
electrocatalyst
Zn
co-doped
Co
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(30), P. 18832 - 18865
Published: Jan. 1, 2024
This
review
focuses
mainly
on
the
overall
facilitating
effect
of
heterostructures
OER
process.
The
fabrication
heterostructured
electrocatalysts
and
relationship
between
their
structures
electrocatalytic
properties
are
discussed.
