Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 19, 2024
Abstract
Acidic
overall
water‐splitting
driven
by
consistent
electricity
is
an
efficient
and
economical
method
for
producing
green
hydrogen.
However,
developing
highly
active
durable
bifunctional
electrocatalysts
both
hydrogen
oxygen
evolution
reactions
(HER
OER)
in
acidic
conditions
remains
a
challenge.
Here,
single‐atom
Mn
sites
are
introduced
into
Ru/RuO₂
heterostructures
(Mn(SAs)‐Ru/RuO
2
)
as
electrocatalysts,
achieving
low
overpotentials
of
39
158
mV
at
10
mA
cm
−2
HER
OER,
respectively,
while
maintaining
long‐term
durability
over
500
h
1.47
V
0.5
m
H
SO
4
.
It
outperforms
most
previously
reported
electrocatalysts.
Theoretical
calculations
show
that
the
charge
redistribution
caused
single‐site
dopants
optimizes
adsorption
OOH
*
Ru
sites,
significantly
boosting
electrochemical
kinetics
OER
HER.
This
work
presents
effective
metal
doping
strategy
to
optimize
distribution
water‐splitting.
DeCarbon,
Journal Year:
2024,
Volume and Issue:
5, P. 100062 - 100062
Published: July 14, 2024
Within
the
framework
of
achieving
global
carbon
neutrality,
utilizing
electrocatalytic
water
splitting
to
produce
"green
hydrogen"
holds
significant
promise
as
an
effective
solution.
The
strategic
development
economic,
efficient,
and
robust
anode
oxygen
evolution
reaction
(OER)
catalysts
is
one
imminent
bottlenecks
for
scalable
application
electrolyzing
into
hydrogen
oxygen,
particularly
under
actual
yet
harsh
operating
conditions
such
large
current
density
(LCD).
In
this
review,
we
intend
summarize
advances
challenges
in
understanding
OER
at
LCD.
Initially,
impact
LCD
on
electron
transfer,
mass
transportation
efficiency
catalyst
stability
identified
summarized.
Furthermore,
five
basic
principles
design,
namely
dimension
materials,
surface
chemistry,
creation
transfer
pathways,
synergy
among
nano-,
micro-,
macroscale
structures,
catalyst-support
interaction,
are
systematically
discussed.
Specifically,
correlation
between
synergistic
function
multiscale
structures
interaction
highlighted
direct
improvements
durability
Finally,
outlook
prospected
further
our
these
topics
provide
related
researchers
with
potential
research
areas.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 9, 2024
Abstract
Spinel
oxides
have
emerged
as
highly
active
catalysts
for
the
oxygen
evolution
reaction
(OER).
Owing
to
covalency
competition,
OER
process
on
spinel
often
follows
an
arduous
adsorbate
mechanism
(AEM)
pathway.
Herein,
we
propose
a
novel
rare‐earth
sites
substitution
strategy
tune
lattice
redox
of
and
bypass
AEM
scaling
relationship
limitation.
Taking
NiCo
2
O
4
model,
incorporation
Ce
into
octahedral
site
induces
formation
Ce−O−M
(M=Ni,
Co)
bridge,
which
triggers
charge
redistribution
within
.
The
developed
Ce−NiCo
exhibits
remarkable
activity
with
low
overpotential,
satisfactory
electrochemical
stability,
good
practicability
in
anion‐exchange
membrane
water
electrolyzer.
Theoretical
analyses
reveal
that
surface
more
favorable
(LOM)
pathway
non‐concerted
proton‐electron
transfers
compared
pure
,
also
verified
by
pH‐dependent
behavior
situ
Raman
analysis.
18
O‐labeled
mass
spectrometry
provides
direct
evidence
released
during
originates
from
We
discover
electron
delocalization
f
states
through
favoring
antibonding
state
occupation
Ni−O
bonding
[Ce−O−Ni]
unit
site,
thereby
activating
OER.
This
work
new
perspective
designing
offers
significant
insights
rare‐earth‐enhanced
LOM
mechanism.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 6, 2024
Abstract
The
sluggish
reaction
kinetics
of
the
anodic
oxygen
evolution
(OER)
and
inadequate
catalytic
performance
non‐noble
metal‐based
electrocatalysts
represent
substantial
barriers
to
development
anion
exchange
membrane
water
electrolyzer
(AEMWE).
This
study
performed
synthesis
a
three‐dimensional
(3D)
nanoflower‐like
electrocatalyst
(CFMO)
via
simple
one‐step
method.
substitution
Co
with
Fe
in
structure
induces
localized
oxide
path
mechanism
(LOPM),
facilitating
direct
O−O
radical
coupling
for
enhanced
O
2
evolution.
optimized
CFMO‐2
demonstrates
superior
OER
performance,
achieving
an
overpotential
217
mV
at
10
mA
cm
−2
,
alongside
exceptional
long‐term
stability
minimal
degradation
after
1000
h
operation
1.0
M
KOH.
These
properties
surpass
most
conventional
noble
electrocatalysts.
Furthermore,
assembled
AEMWE
system,
utilizing
CFMO‐2,
operates
cell
voltage
1.65
V
deliver
A
.
In
situ
characterizations
reveal
that,
addition
traditional
adsorbate
(AEM)
isolated
sites,
new
LOPM
occurred
around
bimetallic
sites.
First‐principles
calculations
confirm
greatly
reduced
energy
barriers.
work
highlights
potential
improving
design
AEMWE.
Constructing
low-cost,
high-efficiency,
and
earth-abundant
electrocatalysts
for
enhancing
the
energy
efficiency
of
water
splitting
is
highly
desirable.
Herein,
we
employed
a
facile
strategy
V
cation
doping
Ru
nanoparticles
modification
to
construct
multifunctional
NiFe-LDH
electrocatalyst
(Ru/V-NiFe-LDH)
on
nickel
foam
(NF)
substrate.
This
Ru/V-NiFe-LDH/NF
catalyst
exhibited
exceptional
catalytic
activity
(e.g.,
small
overpotentials
Tafel
slope)
good
stability
in
HER,
OER,
UOR,
indicating
significantly
lower
than
that
commercial
Pt–C
RuO2.
These
excellent
electrochemical
properties
primarily
resulted
from
effects
modification,
which
altered
surface
charge
state
matrix,
led
electron
rearrangement,
accelerated
transfer,
provided
more
active
sites,
enhanced
intrinsic
activity.
Moreover,
when
assembled
into
two-electrode
system
with
overall
water/urea
splitting,
low
cell
voltage
1.53
1.40
@10
mA
cm–2
was
afforded.
Furthermore,
this
also
outstanding
stability,
only
19%
decay
high
current
density
at
50
after
48
h.
performances
far
surpass
those
RuO2||Pt–C
most
nonprecious-metal
catalysts.
work
highlights
rational
design
high-performance
applications.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 28, 2024
High-efficiency
catalysts
with
refined
electronic
structures
are
highly
desirable
for
promoting
the
kinetics
of
oxygen
evolution
reaction
(OER)
and
enhancing
catalyst
durability.
This
study
comprehensively
explores
strategies
involving
metal
doping
vacancies
acidic
OER
catalytic
activity
Co
Energy Materials,
Journal Year:
2025,
Volume and Issue:
5(3)
Published: Jan. 15, 2025
The
lattice
oxygen
mechanism
(LOM)
plays
a
critical
role
in
the
acidic
evolution
reaction
(OER)
as
it
provides
more
efficient
catalytic
pathway
compared
to
conventional
adsorption
(AEM).
LOM
effectively
lowers
energy
threshold
of
and
accelerates
rate
by
exciting
atoms
catalyst
directly
participate
OER
process.
In
recent
years,
with
increase
in-depth
understanding
LOM,
researchers
have
developed
variety
iridium
(Ir)
ruthenium
(Ru)-based
catalysts,
well
non-precious
metal
oxide
optimized
their
performance
through
different
strategies.
However,
still
faces
many
challenges
practical
applications,
including
long-term
stability
precise
modulation
active
sites,
application
efficiency
real
electrolysis
systems.
Here,
we
review
OER,
analyze
its
difference
traditional
AEM
new
(OPM)
mechanism,
discuss
experimental
theoretical
validation
methods
pathway,
prospect
future
development
electrocatalyst
design
conversion,
aiming
provide
fresh
perspectives
strategies
for
solving
current
challenges.
