Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 12, 2024
Abstract
Ruthenium
Dioxide
(RuO
2
),
as
one
of
the
most
promising
alternatives
to
IrO
,
suffers
from
severe
dissolution
and
overoxidation
Ru
active
sites
during
acidic
oxygen
evolution
reaction
(OER),
which
hinders
its
practical
application.
Herein,
study
constructs
a
short‐range
ordered
tantalum
single
atoms‐doped
RuO
catalyst
(Ta‐RuO
)
with
asymmetric
Ru‐O‐Ta(‐O‐Ta)
units
for
enhanced
OER.
The
Ta‐RuO
exhibits
superior
catalytic
activity
an
overpotential
201
mV
at
10
mA
cm
−2
long‐lasting
stability
280
h.
Physical
characterizations
combined
electrochemical
tests
reveal
that
incorporation
atomically
arranged
Ta
atoms
induces
significant
tensile
strain,
effectively
optimizing
adsorption
strength
oxygen‐containing
intermediates
by
regulating
d
‐band
center
weakening
Ru‐O
covalency,
thus
boosting
activity.
Furthermore,
formed
local
structure
is
well
maintained
OER
process
owing
synergy
strong
corrosion
resistance
Ta‐O
bonds
electron
transfers
via
bridge
stabilizing
sites,
contributing
stability.
This
provides
novel
method
corrosion‐resistant
significantly
enhance
cost‐effective
catalysts.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(28)
Опубликована: Апрель 25, 2024
Abstract
RuO
2
has
been
considered
as
the
most
likely
acidic
oxygen
evolution
reaction
(OER)
catalyst
to
replace
IrO
,
but
its
performance,
especially
long‐term
stability
under
harsh
conditions,
is
still
unacceptable.
Here,
we
propose
a
grain
boundary
(GB)
engineering
strategy
by
fabricating
ultrathin
porous
nanosheet
with
abundant
of
boundaries
(GB‐RuO
)
an
efficient
acid
OER
catalyst.
The
involvement
GB
induces
significant
tensile
stress
and
creates
unsaturated
coordination
environment,
effectively
optimizing
adsorption
intermediates
stabilizing
active
site
structure
during
process.
Notably,
GB‐RuO
not
only
exhibits
low
overpotential
(η
10
=187
mV)
ultra‐low
Tafel
slope
(34.5
mV
dec
−1
),
also
steadily
operates
for
over
550
h
in
0.1
M
HClO
4
.
Quasi
situ/operando
methods
confirm
that
improved
attributed
preventing
Ru
dissolution
greatly
inhibiting
lattice
oxidation
mechanism
(LOM).
A
proton
exchange
membrane
water
electrolysis
(PEMWE)
using
voltage
1.669
V
at
cm
−2
stably
100
mA
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Ноя. 12, 2024
Ruthenium
(Ru)
is
widely
recognized
as
a
low-cost
alternative
to
iridium
anode
electrocatalyst
in
proton-exchange
membrane
water
electrolyzers
(PEMWE).
However,
the
reported
Ru-based
catalysts
usually
only
operate
within
tens
of
hours
PEMWE
because
their
intrinsically
high
reactivity
lattice
oxygen
that
leads
irrepressible
Ru
leaching
and
structural
collapse.
Herein,
we
report
design
concept
by
employing
large-sized
acid-resistant
lead
(Pb)
second
element
induce
pinning
effect
for
effectively
narrowing
moving
channels
atoms,
thereby
lowering
oxides.
The
Pb-RuO
Electrochemical
acidic
oxygen
evolution
reaction
(OER)
is
an
important
part
for
water
electrolysis
utilizing
a
proton
exchange
membrane
(PEM)
apparatus
industrial
H
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Ноя. 28, 2024
The
development
of
efficient
and
stable
electrocatalysts
for
water
oxidation
in
acidic
media
is
vital
the
commercialization
proton
exchange
membrane
electrolyzers.
In
this
work,
we
successfully
construct
Ru–O–Ir
atomic
interfaces
oxygen
evolution
reaction
(OER).
catalysts
achieve
overpotentials
as
low
167,
300,
390
mV
at
10,
500,
1500
mA
cm−2
0.5
M
H2SO4,
respectively,
with
electrocatalyst
showing
robust
stability
>1000
h
operation
10
negligible
degradation
after
200,000
cyclic
voltammetry
cycles.
Operando
spectroelectrochemical
measurements
together
theoretical
investigations
reveal
that
OER
pathway
over
active
site
near-optimal,
where
bridging
Ir–OBRI
serves
acceptor
to
accelerate
transfer
on
an
adjacent
Ru
centre,
breaking
typical
adsorption-dissociation
linear
scaling
relationship
a
single
thus
enhancing
activity.
Here,
show
rational
design
multiple
sites
can
break
activity/stability
trade-off
commonly
encountered
catalysts,
offering
good
approaches
towards
high-performance
catalysts.
Efficient
are
essential
authors
report
enable
oxygen-mediated
deprotonation
pathways,
overcoming
evolution.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Ноя. 4, 2024
Enhancing
corrosion
resistance
is
essential
for
developing
efficient
electrocatalysts
acidic
oxygen
evolution
reaction
(OER).
Herein,
we
report
the
strategic
manipulation
of
local
compressive
strain
to
reinforce
anti-corrosion
properties
non-precious
Co3O4
support.
The
incorporation
Ru
single
atoms,
larger
in
atomic
size
than
Co,
into
lattice
(Ru-Co3O4),
triggers
localized
compression
and
distortion
on
Co-O
lattice.
A
comprehensive
exploration
correlation
between
this
specific
electrocatalytic
performance
conducted
through
experimental
theoretical
analyses.
presence
Ru-Co3O4
confirmed
by
operando
X-ray
absorption
studies
supported
quantum
calculations.
This
strain,
presented
a
shortened
bond
length,
enhances
suppressing
metal
dissolutions.
Consequently,
shows
satisfactory
stability,
maintaining
OER
over
400
hours
at
30
mA
cm−2
with
minimal
decay.
study
demonstrates
potential
effect
fortifying
catalyst
stability
beyond.
crucial
reaction.
Here,
authors
improve
Co3O4,
demonstrating
cm-2.
International Journal of Molecular Sciences,
Год журнала:
2025,
Номер
26(4), С. 1582 - 1582
Опубликована: Фев. 13, 2025
Developing
a
highly
active
and
stable
catalyst
for
acidic
oxygen
evolution
reactions
(OERs),
the
key
half-reaction
proton
exchange
membrane
water
electrolysis,
has
been
one
of
most
cutting-edge
topics
in
electrocatalysis.
A
dual-doping
strategy
optimizes
electronic
environment,
modifies
coordination
generates
vacancies,
introduces
strain
effects
through
synergistic
effect
two
elements
to
achieve
high
catalytic
performance.
In
this
review,
we
summarize
progress
dual
doping
RuO2
or
IrO2
OERs.
The
three
main
mechanisms
OERs
are
dicussed
firstly,
followed
by
detailed
examination
development
history
catalysts,
from
experimentally
driven
systems
machine
learning
(ML)
theoretical
screening
systems.
Lastly,
provide
summary
remaining
challenges
future
prospects,
offering
valuable
insights
into
Nano Letters,
Год журнала:
2024,
Номер
24(35), С. 10899 - 10907
Опубликована: Авг. 26, 2024
The
oxygen
evolution
reaction
(OER)
performance
of
ruthenium-based
oxides
strongly
correlates
with
the
electronic
structures
Ru.
However,
widely
adopted
monometal
doping
method
unidirectionally
regulates
only
structures,
often
failing
to
balance
activity
and
stability.
Here,
we
propose
an
"elastic
electron
transfer"
strategy
achieve
bidirectional
optimization
Sr,
Cr
codoped
RuO
Water
electrolysis
driven
by
"green
electricity"
is
an
ideal
technology
to
realize
energy
conversion
and
store
renewable
into
hydrogen.
With
the
development
of
proton
exchange
membrane
(PEM),
water
in
acidic
media
suitable
for
many
situations
with
outstanding
advantage
high
gas
purity
has
attracted
significant
attention.
Compared
hydrogen
evolution
reaction
(HER)
electrolysis,
oxygen
(OER)
a
kinetic
sluggish
process
that
needs
higher
overpotential.
Especially
media,
OER
poses
requirements
electrocatalysts,
such
as
efficiency,
stability
low
costs.
This
review
focuses
on
electrocatalysis,
mechanisms,
critical
parameters
used
evaluate
performance.
modification
strategies
applied
design
construction
new-type
electrocatalysts
are
also
summarized.
The
characteristics
traditional
noble
metal-based
metal-free
developed
recent
decades
compared
discussed.
Finally,
current
challenges
most
promising
presented,
together
perspective
future
electrolysis.
