InfoMat,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 8, 2025
Abstract
Rechargeable
zinc–air
batteries
(RZABs),
emerged
as
a
prospective
energy
conversion
device,
have
garnered
substantial
attention
from
researchers
over
the
past
decades.
Nevertheless,
sluggish
kinetic
processes
related
to
oxygen
reduction
reaction
(ORR)
and
evolution
(OER)
that
occurred
on
air
cathode
throughout
charge–discharge
cycles
pose
significant
challenge.
Therefore,
advancement
of
bifunctional
electrocatalysts
possessing
excellent
performance
robust
cycling
stability
is
crucial
importance.
Herein,
coordination
polymer
(dimethylimidazolium‐Co
2+
‐potassium
ferricyanide),
assembled
via
chemical
induced
self‐assembly
strategy,
has
been
utilized
precursors
for
fabrication
1D/3D
dual
carbon‐supported
Fe
3
Co
nitrogen
carbides
(Fe
Co–NC).
Confirmed
by
characterization
results
theoretical
calculations,
synergistic
effect
FeN
2
–CoN
active
sites
hierarchical
networks
effectively
enhances
its
ORR/OER
activities
under
alkaline
electrolyte
conditions.
Specifically,
as‐prepared
Co‐NC
composite
exhibits
remarkable
half‐wave
potential
0.88
V
achieves
1.67
overpotential
at
10
mA
cm
−2
.
Moreover,
peak
power
density
as‐assembled
RZAB
reaches
182.4
mW
,
maintaining
an
output
voltage
approximately
1.1
after
400
h
galvanostatic
discharge–charge
cycling.
This
research
proposes
new,
cost‐effective,
high‐performance
synthesis
approach
preparation
electrocatalysts.
image
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(9), P. 6981 - 6991
Published: April 19, 2024
Ferroferric
oxide-based
electrocatalysts
are
widely
applied
as
hydrogen
evolution
reaction
(HER)
catalysts
due
to
their
low
cost
and
good
electrical
conductivity,
but
they
tend
exhibit
slow
adsorption
kinetics
for
HER
poison
by
corrosive
Cl–
alkaline
seawater
splitting.
In
this
regard,
we
report
a
nanosheet-like
catalyst
constructed
decorating
Fe3O4
with
Ru
P
dual
doping
(Ru/P–Fe3O4@IF).
situ
characterization
density
functional
theory
(DFT)
calculations
demonstrate
that
the
resulting
Ru/P–Fe3O4@IF
shows
enhanced
strength
coverage
thermal
neutral
free
energy
of
adsorbed
H
(ΔGH*)
modulating
d-band
center
Fe3O4.
Moreover,
Ru/P
moving
up
center,
weak
makes
on
active
sites
be
avoided
in
Benefiting
from
above,
exhibits
superior
performance
commercial
Pt/C
overpotentials
only
−46
−144
mV
reach
100
1000
mA
cm–2,
respectively.
addition,
AEM
electrolyzer
assembled
Ru/P–Fe3O4
requires
1.93
V
(cell
voltage)
drive
current
2
A
cm–2
can
maintain
stable
operation
more
than
h
at
500
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(12)
Published: Jan. 15, 2024
Abstract
Developing
efficient
metal‐nitrogen‐carbon
(M‐N‐C)
single‐atom
catalysts
for
oxygen
reduction
reaction
(ORR)
is
significant
the
widespread
implementation
of
Zn‐air
batteries,
while
synergic
design
matrix
microstructure
and
coordination
environment
metal
centers
remains
challenges.
Herein,
a
novel
salt
effect‐induced
strategy
proposed
to
engineer
N
P
coordinated
atomically
dispersed
Fe
atoms
with
extra‐axial
Cl
on
interlinked
porous
carbon
nanosheets,
achieving
superior
catalyst
(denoted
as
Fe‐NP‐Cl‐C)
ORR
batteries.
The
hierarchical
nanosheet
architecture
can
provide
rapid
mass/electron
transfer
channels
facilitate
exposure
active
sites.
Experiments
density
functional
theory
(DFT)
calculations
reveal
distinctive
Fe‐N
2
‐Cl
sites
afford
significantly
reduced
energy
barriers
promoted
kinetics
ORR.
Consequently,
Fe‐NP‐Cl‐C
exhibits
distinguished
performance
half‐wave
potential
(E
1/2
)
0.92
V
excellent
stability.
Remarkably,
assembled
battery
based
delivers
an
extremely
high
peak
power
260
mW
cm
−2
large
specific
capacity
812
mA
h
g
−1
,
outperforming
commercial
Pt/C
most
reported
congeneric
catalysts.
This
study
offers
new
perspective
structural
optimization
engineering
electrocatalysis
conversion
devices.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(51)
Published: Sept. 4, 2024
Abstract
Zinc‐air
batteries
(ZABs)
have
the
advantages
of
high
energy
density
and
rich
zinc
raw
materials.
It
is
a
low‐cost,
green
sustainable
storage
device.
At
present,
one
key
technologies
that
hinder
large‐scale
application
ZABs
design
fabrication
oxygen
evolution
reaction
(OER)
reduction
(ORR)
bifunctional
catalysts
with
excellent
performance,
especially
non‐platinum‐based
catalysts.
Here
N‐doped
carbon‐coated
Fe‐based
selenium
oxide
catalyst
Fe
2
O(SeO
3
)
/Fe
C@NC
performance
has
been
fabricated
by
one‐step
pyrolysis
then
electrochemical
oxidization.
The
experimental
results
confirmed
existence
Fe−O−Se
bonds
in
crystal
phase
C@NC,
could
obviously
enhance
ORR
OER
catalytic
C@NC.
Density
functional
theoretical
calculations
(DFT)
had
higher
d
‐band
center
atom
lower
p
‐orbital
coupling
degree
its
own
lattice
O
than
,
which
leads
to
site
being
more
likely
adsorb
external
intermediates.
modification
coordination
environment
atoms
optimizes
adsorption
for
Compared
showed
obvious
enhancements
ORR/OER
activities
half‐wave
potential
0.91
V
0.1
M
KOH
electrolyte
low
overpotential
345
mV
at
10
mA
cm
−2
1.0
electrolyte.
peak
power
specific
capacity
C@NC‐based
are
those
Pt/C+RuO
‐ZABs.
above
demonstrate
asymmetrical
plays
role
improving
ZABs.
