Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 28, 2025
Abstract
Reversible
protonic
solid
oxide
cells
(R‐PSOCs)
are
promising
green
energy
storage
devices
for
efficient
hydrogen/electricity
conversion.
Due
to
the
complex
environment
of
air
electrode,
microscopic
influence
mechanism
oxygen
vacancies
in
perovskites
on
reduction
reaction
(ORR)
and
evolution
(OER)
is
unclear.
In
this
study,
layered
Ruddlesden–Popper
perovskite
Ln
2
NiO
4
(Ln
=
La,
Pr,
Nd)
electrodes
constructed
investigate
effect
water/oxygen
coupling
dual
mode.
The
Pr
4+δ
full
cell
exhibits
highest
peak
power
density
0.692
W
cm
−2
fuel
mode
a
maximum
current
−1.2
A
electrolysis
at
700
°C.
changes
electrochemical
impedance
spectroscopy
show
that
can
absorb
small
amount
interfacial
water
SOFC
promote
triple‐conductivity.
Meanwhile,
it
have
good
electrolytic
performance
an
atmosphere
10%
H
O
SOEC
enriched
Pr₂NiO
provide
broad
platform
both
ORR
OER,
while
appropriate
hydrophilicity
achieve
better
balance
state
by
competitive
adsorption
water/oxygen.
These
comprehensive
characteristics
make
suitable
be
potential
electrode
material
RSOCs.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 16, 2025
Abstract
Engineering
nanomaterials
at
single‐atomic
sites
can
enable
unprecedented
catalytic
properties
for
broad
applications,
yet
it
remains
challenging
to
do
so
on
RuO
2
‐based
electrocatalysts
proton
exchange
membrane
water
electrolyzer
(PEMWE).
Herein,
the
rational
design
and
construction
of
Bi‐RuO
single‐atom
alloy
oxide
(SAAO)
are
presented
boost
acidic
oxygen
evolution
reaction
(OER),
via
phase
engineering
a
novel
hexagonal
close
packed
(
hcp
)
RuBi
alloy.
This
SAAO
electrocatalyst
exhibits
low
overpotential
192
mV
superb
stability
over
650
h
10
mA
cm
−2
,
enabling
practical
PEMWE
that
needs
only
1.59
V
reach
1.0
A
under
industrial
conditions.
Operando
differential
electrochemical
mass
spectroscopy
analysis,
coupled
with
density
functional
theory
studies,
confirmed
adsorbate‐evolving
mechanism
incorporation
Bi
1
improves
activity
by
electronic
optimization
hindering
surface
Ru
demetallation.
work
not
introduces
new
strategy
fabricate
high‐performance
atomic‐level,
but
also
demonstrates
their
potential
use
in
electrolyzers.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 28, 2025
Proton
exchange
membrane
(PEM)
water
electrolysis
offers
an
efficient
route
to
large-scale
green
hydrogen
production,
in
which
the
RuO2
catalyst
exhibits
superior
activity
but
limited
stability.
Unveiling
atomic-scale
structural
evolution
during
operando
reaction
conditions
is
critical
remains
a
grand
challenge
for
enhancing
durability
of
acidic
oxygen
(a-OER).
This
study
proposes
adaptive
machine
learning
workflow
elucidate
potential-dependent
state-to-state
global
RuO2(110)
surface
within
complex
composition
and
configuration
space,
revealing
correlation
between
patterns
We
identify
active
state
with
distorted
RuO5
units
that
self-evolve
at
low
potential,
minor
Ru
dissolution
self-promotion
phenomenon.
However,
this
potential
resistance
capacity
(PRC)
evolves
into
inert
RuO4
elevated
potential.
To
enhance
PRC
mitigate
overevolution
state,
we
explore
metal
doping
engineering
uncover
inverse
volcano-type
rule:
doped
metal-oxygen
bond
strength
should
significantly
differ
from
Ru-O
bond.
rule
provides
theoretical
framework
designing
stable
RuO2-based
catalysts
clarifies
current
discrepancies
regarding
roles
different
metals
stabilizing
RuO2.
Applying
rule,
predict
confirm
experimentally
Na
can
effectively
stabilize
its
state.
The
synthesized
Na-RuO2
operates
a-OER
over
1800
h
without
any
degradation
enables
long-term
PEM
electrolysis.
work
enhances
our
understanding
aids
durable
a-OER.
Proton
exchange
membrane
(PEM)
water
electrolyzers
are
one
type
of
the
most
promising
technologies
for
efficient,
nonpolluting
and
sustainable
production
high-purity
hydrogen.
The
anode
catalysts
account
a
very
large
fraction
cost
in
PEM
electrolyzer
also
determine
lifetime
electrolyzer.
To
date,
Ir-
Ru-based
materials
types
acidic
oxygen
evolution
reaction
(OER),
but
they
still
face
challenges
high
or
low
stability.
Hence,
exploring
Ir
stable
electrocatalysts
OER
attracts
extensive
research
interest
recent
years.
Owing
to
these
great
efforts,
significant
developments
have
been
achieved
this
field.
In
review,
field
comprehensively
described.
possible
mechanisms
first
presented,
followed
by
introduction
criteria
evaluation
electrocatalysts.
development
then
elucidated
according
strategies
utilized
tune
catalytic
performances.
Lastly,
future
burgeoning
is
discussed.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 1, 2025
Synchronous
electrosynthesis
of
value-added
adipic
acid
(AA)
and
H2
is
extremely
crucial
for
carbon
neutrality.
However,
accomplishing
the
preparation
AA
at
large
current
density
with
high
selectivity
still
challenging.
Herein,
a
robust
Mo-doped
Ni2P@Ni12P5
heterojunction
more
P
vacancies
on
Ni
foam
proposed
simultaneous
electrooxidation
cyclohexanol
(CHAOR)
to
hydrogen
evolution
reaction
(HER)
density.
Combined
X-ray
photoelectron
spectroscopy,
absorption
fine
structure,
electron
spin
resonance
confirm
that
Mo
incorporation
induces
charge
redistribution
Ni2P@Ni12P5,
where
adjusts
electrons
from
P,
triggers
vacancies.
Further
experimental
theoretical
investigations
reveal
d-band
center
upshifted,
optimizing
adsorption
energies
water
electron-rich
site
boosting
HER
activity.
Besides,
Ni3+
generated
electron-deficient
induced
by
Mo,
alongside
OH*
triggered
concurrently
promote
CHA
dehydrogenation
C─C
bond
cleavage,
decreasing
energy
barrier
CHAOR.
Consequently,
two-electrode
flow
electrolyzer
achieves
industrial
(>230
mA
cm-2)
85.7%
yield,
100%
Faradaic
efficiency
production.
This
study
showcases
an
bifunctional
electrocatalyst
production
productivity.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 11, 2025
Abstract
Atop
and
multiple
adsorbed
hydrogen
are
considered
as
key
intermediates
on
Pt‐group
metal
for
acidic
evolution
reaction
(HER),
yet
the
role
of
bridge
intermediate
(
*
H
)
is
consistently
overlooked
experimentally.
Herein,
a
Pt
atomic
chain
modified
fcc
‐Ru
nanocrystal
(Pt–Ru(
))
developed
with
co‐crystalline
structure,
featuring
bonded
Pt–Ru
pair
site.
Electrons
leap
from
site
to
facilitate
desorption,
thus
accelerating
Tafel
kinetics
ensuring
outstanding
electrocatalytic
performance,
low
overpotential
(4.0
mV
at
10
mA
cm
−2
high
turnover
frequency
(56.4
2
s
−1
50
mV).
Notably,
proton
exchange
membrane
water
electrolyzer
PEMWE
ultra‐low
loading
ug
shows
excellent
activity
(1.61
V
1.0
A
average
degradation
rate
µV
h
over
1000
h),
significantly
outperforming
benchmark
Pt/C.
Furthermore,
PEMWE‐based
80
µm
Gore
under
identical
operating
conditions
requires
only
1.54
1.58
achieve
1.5
.
This
finding
highlights
interface
in
obtaining
HER
intrinsic
underscores
transformative
potential
designing
next‐generation
bimetallic
catalysts
clean
energy.
AIChE Journal,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 11, 2025
Abstract
Developing
non‐noble
metal
hydrogen
evolution
reaction
(HER)
catalysts
with
high
efficiency
for
water
dissociation
in
alkaline
environments
is
crucial
achieving
cost‐effective
electrolyzer.
Surface
engineering
offers
immense
potential
to
design
promising
HER
enhanced
performance,
but
it
faces
multiple
challenges
such
as
optimizing
adsorption
energy.
Herein,
Ni‐based
hydroxide
doped
heteroatoms
are
synthesized
via
electrodeposition,
forming
a
Co‐doped
asymmetric
S–Ni–F
coordination
structure,
which
requires
the
overpotential
of
only
20
mV
reach
current
density
−10
mA
cm
−2
,
and
remains
stable
over
100
h
at
−0.5
A
.
DFT
calculations
reveal
that
sulfur
fluorine
doping
could
effectively
mitigate
energy
associated
active
facilitate
molecule
dissociation.
Furthermore,
electron
coupling
within
d
‐orbital
Ni–O–Co
structure
further
amplifies
catalytic
efficacy.
This
offering
pathway
designing
high‐efficiency
catalysts.
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
