Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Июнь 1, 2025
Abstract
Rechargeable
zinc–air
batteries
(ZABs)
are
hindered
by
substantial
voltage
hysteresis
and
limited
cycling
stability.
To
address
these
challenges,
a
dual‐innovation
strategy
is
developed
through
synergistic
electrolyte
engineering
catalyst
design.
First,
implemented
the
incorporation
of
KI
into
electrolyte,
transforming
conventional
ZABs
zinc–air/iodide
hybrid
(ZAIHBs).
This
modification
replaces
oxygen
evolution
reaction
(OER)
with
iodine
oxidation
(IOR),
which
operates
at
significantly
reduced
overpotential.
Second,
FePc@CoSAs/NC
constructed
anchoring
iron
phthalocyanine
(FePc)
on
Co
single‐atom/N‐doped
carbon
substrates.
exhibiting
half‐wave
potential
0.89
V
for
ORR
achieving
1.26
10
mA
cm
−2
IOR
record‐low
ORR/IOR
gap
0.37
V.
The
optimized
ZAIHBs
demonstrate
exceptional
energy
efficiency
75%
stability
(73.5%
retention
over
350
h),
surpassing
ZABs.
Density
functional
theory
calculations
reveal
that
Co–Fe
dual‐site
coordination
optimizes
adsorption
energetics
critical
intermediates
(OH*
in
I*
IOR),
elucidating
enhanced
kinetics.
work
establishes
co‐design
paradigm
high‐performance
systems
integrated
engineering.
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
As
one
of
the
critical
reactions
in
biotransformation
and
energy
conversion
processes,
oxygen
reduction
reaction
(ORR)
catalyzed
by
iron
porphyrins
has
been
widely
explored
electrochemical,
spectroscopic,
theoretical
methods.
However,
experimental
identification
all
proposed
intermediates
catalytic
cycle
is
rather
challenging
mechanistic
studies
ORR
driven
electrochemical
or
chemical
Herein,
we
report
application
mass
spectrometry
(EC-MS)
(CR-MS)
to
situ
uncover
ORRs
mediated
an
porphyrin
molecular
catalyst.
Five
crucial
iron-oxygen
detected
both
EC-MS
CR-MS
help
build
whole
indicate
details
4e-/4H+
pathway
produce
H2O
ORRs.
By
combining
MS
methods
with
spectroscopic
characterize
study
selectivities,
this
work
provides
a
comparison
model
porphyrin.
Catalysts,
Год журнала:
2025,
Номер
15(4), С. 368 - 368
Опубликована: Апрель 10, 2025
Recent
endeavours
to
promote
the
widespread
use
of
renewable
and
sustainable
energy
technologies
depend
heavily
on
development
design
new
catalytic
materials.
In
this
context,
intermetallic
compounds
have
come
into
spotlight
recent
research
as
a
promising
material
class
tune
properties
stability
for
various
uses.
work,
vapour–solid
synthesis
is
highlighted
an
outstanding
method
its
control
over
composition
crystal
structure
prepared
nanoparticles.
Carbon
black-supported
nickel-telluride
nanoparticles
different
compositions
crystallographic
structures
been
synthesised
investigated
regarding
their
oxygen
reduction
reaction
performance
in
alkaline
media.
The
relation
between
activity
ethanol
tolerance
depending
phases
has
investigated.
addition
tellurium
nickel-based
allowed
two-fold
increase
mass
from
43.6
A
gNi−1
Ni/C
88.5
Ni-Te/C.
Onset
half-wave
potentials
were
comparable
commercial
Pt/C
benchmark
catalyst.
Furthermore,
chronoamperometric
testing
showed
that
ethanol-tolerant
Ni-Te/C
catalysts
stable
under
electrocatalytic
conditions
during
trend
Ni-Te
was
followed
order:
Ni3Te2
>
NiTe
NiTe2−x
Ni.
ACS Omega,
Год журнала:
2025,
Номер
10(15), С. 15280 - 15291
Опубликована: Апрель 12, 2025
Metal-organic
frameworks
(MOFs)
are
promising
precursors
for
creating
metal-nitrogen-carbon
(M-N-C)
electrocatalysts
with
high
performance,
though
maintaining
their
structure
during
pyrolysis
is
challenging.
This
study
examines
the
transformation
of
a
Zn-based
MOF
into
an
M-N-C
electrocatalyst,
focusing
on
preservation
carbon
framework
and
prevention
Zn
aggregation
pyrolysis.
A
highly
porous
Zn-N-C
electrocatalyst
derived
from
Zn-TAL
(where
TAL
stands
TalTech-UniTartu
Alliance
Laboratory)
was
synthesized
via
optimized
pyrolysis,
yielding
notable
electrocatalytic
activity
toward
oxygen
reduction
reaction
(ORR).
Scanning
electron
microscopy
(SEM)
X-ray
diffraction
spectroscopy
(XRD)
analyses
confirmed
that
preserved
its
integrity
remained
free
metal
aggregates,
even
at
elevated
temperatures.
Rotating
disc
electrode
(RDE)
tests
in
alkaline
solution
showed
demonstrated
ORR
par
commercial
Pt/C
electrocatalysts.
In
anion-exchange
membrane
fuel
cell
(AEMFC),
material
pyrolyzed
1000
°C
exhibited
peak
power
density
553
mW
cm-2
60
°C.
work
demonstrates
excellent
precursor
forming
hollow
structures,
making
it
high-performance
Pt-free
cells.
Molecules,
Год журнала:
2025,
Номер
30(8), С. 1852 - 1852
Опубликована: Апрель 20, 2025
In
recent
years,
two-dimensional
(2D)
graphitic
carbon
nitride
(g-C3N4)
and
hexagonal
boron
(h-BN)
have
gained
remarkable
attention
due
to
their
resemblance
graphene.
These
materials
a
wide
range
of
applications
in
energy
other
sustainable
fields,
including
heterogeneous
catalysis
photocatalysis.
g-C3N4
h-BN
can
play
different
roles
low-temperature
fuel
cells.
They
be
used
as
catalyst
supports,
catalysts
for
oxygen
reduction,
membrane
fillers.
this
work,
the
application
pure
doped
h-BN,
alone
or
composite
materials,
cells
is
overviewed.
Chemical Society Reviews,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Recent
progress
made
in
Co-based
electrocatalysts
for
selective
four-electron
(4e
−
)
and
two-electron
(2e
electrocatalytic
oxygen
reduction
reactions
is
reviewed.
Abstract
The
oxygen
reduction
reaction
(ORR)
is
a
crucial
process
in
electrochemical
energy
technologies,
featuring
fuel
cells
and
metal‐air
batteries
the
coming
carbon‐neutral
society.
Carbon
materials
have
garnered
significant
attention
as
economical,
sustainable
alternatives
to
precious
metal
catalysts.
In
particular,
there
been
increasing
reports
recently
that
pentagons
introduced
into
graphitic
carbons
promote
catalytic
activity
for
ORR.
addition,
interesting
studies
are
reported
on
carbon
materials’
synthesis,
characterization,
spin
polarization
properties
with
pentagonal
defects.
This
review
comprehensively
summarizes
formation
mechanism,
spin,
(O
2
)
adsorption,
ORR
of
catalysts
By
connecting
dots
between
theoretical
insights
experimental
results,
this
elucidates
fundamental
principles
governing
pentagon‐related
offers
perspectives
future
directions
designing
efficient
based
materials.
