Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
Abstract
This
study
reports
an
effective
strategy
for
designing
3D
electrocatalyst
via
the
deposition
of
ZIF67‐derived
Co–CN
shell
layer
over
CuO
nanoarrays
to
form
a
CuO@Co–CN
hybrid,
followed
by
incorporation
with
p
‐block
Sb
single
atoms
(CuO@Co–CN/Sb)
obtain
highly
activated
catalytic
behaviors.
Inheriting
both
excellent
intrinsic
activity
components
and
their
synergy,
CuO@Co–CN/Sb
material
serves
as
high‐efficiency
multifunctional
catalyst
overall
water
splitting
zinc
(Zn)–air
batteries.
The
yields
current
density
10
mA
cm
−2
at
low
overpotential
72
250
mV
hydrogen
evolution
reaction
oxygen
reaction,
respectively.
Furthermore,
electrolyzer
based
on
shows
remarkable
performance
derived
0.5
A
cell
voltage
2.67
V
good
stability
50
h
continuous
operation
high
.
Simultaneously,
Zn–air
battery
using
air
cathode
open
circuit
1.455
discharge
power
131.07
mW
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
Abstract
Oxygen
evolution
reaction
(OER)
is
a
cornerstone
of
various
electrochemical
energy
conversion
and
storage
systems,
including
water
splitting,
CO
2
/N
reduction,
reversible
fuel
cells,
rechargeable
metal‐air
batteries.
OER
typically
proceeds
through
three
primary
mechanisms:
adsorbate
mechanism
(AEM),
lattice
oxygen
oxidation
(LOM),
oxide
path
(OPM).
Unlike
AEM
LOM,
the
OPM
via
direct
oxygen–oxygen
radical
coupling
that
can
bypass
linear
scaling
relationships
intermediates
in
avoid
catalyst
structural
collapse
thereby
enabling
enhanced
catalytic
activity
stability.
Despite
its
unique
advantage,
electrocatalysts
drive
remain
nascent
are
increasingly
recognized
as
critical.
This
review
discusses
recent
advances
OPM‐based
electrocatalysts.
It
starts
by
analyzing
mechanisms
guide
design
Then,
several
types
novel
materials,
atomic
ensembles,
metal
oxides,
perovskite
molecular
complexes,
highlighted.
Afterward,
operando
characterization
techniques
used
to
monitor
dynamic
active
sites
examined.
The
concludes
discussing
research
directions
advance
toward
practical
applications.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 14, 2025
Abstract
Exploring
highlyefficient
electrocatalysts
for
overall
water
splitting
is
a
challenging
butnecessary
task
development
of
green
and
renewable
energy.
Herein,
PtIrFeCoNi
high‐entropy
alloy
nanoflowers
(HEA
NFs)
withstrong
3d‐5d
orbital
hybridization
were
fabricated
to
achieve
highly
efficientoverall
at
high
current
density.
The
Pt
26
Ir
7
Fe
13
Co
22
Ni
32
HEA
NFs
achieved
57.52‐fold
higher
than
commercial
IrO
2
in
turnoverfrequency
(TOF)
oxygen
evolution
reaction
(OER).
Besides,
its
TOF
value
forhydrogen
(HER)
was
2.11‐fold
that
commercialPt/C.
cell
voltages
based
on
only
1.594
V
1.861
currentdensities
100
mA
cm
−2
500
,
which
weresignificantly
lower
those
Pt/C
