Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 4, 2025
RuO2
with
high
intrinsic
activity
for
water
oxidation
is
a
promising
alternative
to
IrO2
in
proton
exchange
membrane
(PEM)
electrolyzer,
but
it
suffers
from
long-term
stability
issues
due
overoxidation.
Here,
we
report
sub-4
nm
Ru-RuO2
Schottky
nanojunction
(Ru-RuO2-SN)
prepared
by
microwave
reaction
that
exhibits
and
both
three-electrode
systems
PEM
devices.
The
lattice
strain
charge
transfer
induced
the
metal-oxide
SN
increase
work
function
of
Ru-RuO2-SN,
optimize
local
electronic
structure,
reduce
desorption
energy
metal
site
oxygen-containing
intermediates;
as
result,
leads
oxide
path
mechanism
(OPM)
inhibits
excessive
surface
ruthenium.
Ru-RuO2-SN
requires
only
165
mV
overpotential
obtain
10
mA·cm-2
1400
h
without
obvious
degradation,
achieving
number
(6.7
×
106)
matching
iridium-based
catalysts.
In
electrolyzer
an
anode
catalyst,
1.6
V
needed
reach
1.0
A·cm-2
shows
at
100
1100
500
h.
was
analyzed
density
functional
theory
calculations.
This
reports
durable,
pure
Ru-based
water-oxidation
catalyst
provides
new
perspective
development
efficient
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
The
catalyst-electrolyte
interface
plays
a
crucial
role
in
proton
exchange
membrane
water
electrolysis
(PEMWE).
However,
optimizing
the
interfacial
hydrogen
bonding
to
enhance
both
catalytic
activity
and
stability
remains
significant
challenge.
Here,
novel
catalyst
design
strategy
is
proposed
based
on
hard-soft
acid-base
principle,
employing
hard
Lewis
acids
(LAs
=
ZrO
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Abstract
Achieving
close
integration
and
strong
electronic
communication
between
molecular
catalysts
conductive
substrates
is
crucial
for
developing
the
stability
catalytic
activity
of
nanomaterials.
However,
constructing
heterostructure
catalyst
usually
need
complex
demanding
synthesis
processes.
Herein,
a
facile
universal
“molecular
nanojunction”
strategy
developed
to
prepare
with
high
by
improving
coplanarity
nanojunction
facilitating
efficient
electron
transfer.
The
density
function
theory
(DFT)
calculations
in
situ
characterization
indicate
that
reduces
excessive
*
OH
adsorption
accelerates
deprotonation
process,
thereby
promoting
oxygen
generation.
shows
better
evolution
reaction
(OER)
performance
than
most
reported
catalysts.
What's
more,
are
applied
alkaline
anion
exchange
membrane
(AEM)
electrolysis
cells,
exhibiting
excellent
performance.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 30, 2025
The
trade-off
between
the
performances
of
oxygen
reduction
reaction
(ORR)
and
evolution
(OER)
presents
a
challenge
in
designing
high-performance
aqueous
rechargeable
zinc–air
batteries
(a-r-ZABs)
due
to
sluggish
kinetics
differing
requirements.
Accurate
control
atomic
electronic
structures
is
crucial
for
rational
design
efficient
bifunctional
electrocatalysts.
Herein,
we
designed
Sn–Co/RuO2
trimetallic
oxide
utilizing
dual-active
sites
tin
(Sn)
regulation
strategy
by
dispersing
Co
(for
ORR)
auxiliary
Sn
into
near-surface
surface
RuO2
OER)
enhance
both
ORR
OER
performances.
Both
theoretical
calculations
advanced
dynamic
monitoring
experiments
revealed
that
effectively
regulated
atomic/electronic
environment
Ru
sites,
which
optimized
*OOH/*OH
adsorption
behavior
promoted
release
final
products,
thus
breaking
limits.
Therefore,
as-designed
catalysts
exhibited
superb
performance
with
an
potential
difference
(ΔE)
0.628
V
negligible
activity
degradation
after
200,000
or
20,000
CV
cycles.
a-r-ZABs
based
on
catalyst
higher
at
wide
temperature
range
−30
65
°C.
They
demonstrated
ultralong
lifespan
138
days
(20,000
cycles)
5
mA
cm–2,
39.7
times
than
Pt/C
+
IrO2
coupled
low
−20
Additionally,
they
maintained
initial
power
density
85.8%
long-term
tests,
significantly
outperforming
previously
reported
catalysts.
More
importantly,
also
showed
excellent
stability
766.45
h
(about
4598
high
current
10
cm–2.
