Abstract
Developing
high
performance
and
cost‐effective
electrocatalysts
toward
oxygen
reduction
reaction
(ORR)
is
of
critical
significance
for
fuel
cells
metal–air
batteries.
Herein,
CoO@Co
nanoparticles
encapsulated
in
three‐dimensional
(3D)
porous
nitrogen‐doped
carbon
(CoO@Co/Co‐N‐C)
have
been
successfully
derived
from
the
cobalt–tannin
framework
via
NH
4
Cl
salt
template
strategy.
Owing
to
generated
3
HCl
gas
during
pyrolysis
process,
CoO@Co/Co‐N‐C
formed
a
3D
architecture
with
ultrahigh‐specific
surface
area
(1052.5
m
2
g
−1
).
This
hybrid
catalyst
exhibits
comparable
ORR
catalytic
activity,
as
well
superior
stability
20
wt%
Pt/C
alkaline
conditions.
finding
offers
novel
facile
strategy
synthesize
non‐precious
metal
energy
conversion
storage
applications.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 17, 2024
Abstract
Iron‐based
single‐atom
catalysts
(Fe─N─C)
exhibit
excellent
oxygen
reduction
activity
but
struggle
with
bifunctional
performance
due
to
their
poor
evolution
activity.
Although
the
Fe
spin
state
is
found
be
closely
associated
enhanced
activity,
controllably
regulating
remains
a
challenge.
Here,
controllable
regulation
of
directly
achieved
through
competitive
coordination
between
chlorine
and
pyridine
nitrogen
in
axial
direction
Fe─N
4
.
The
regulated
from
high
intermediate
by
modulation
ligands
weak‐field
ligand
strong‐field
pyridinic
nitrogen,
which
leads
N─FeN
small
potential
gap
(Δ
E
=
0.68
V).
Theoretical
calculations
indicate
that
turning
accompanied
an
binding
strength
sites
*OH
leading
significant
decrease
OER
barrier.
Moreover,
exhibits
sufficient
durability
for
reaction
(ORR)
(over
50
h),
(OER)
200
assembled
zinc–air
battery
1000
h).
Here
novel
approach
proposed
designing
efficient
based
on
profound
insights
into
Fe─N─C
catalysis.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Tin
halide
perovskites
are
promising
candidates
for
lead-free
perovskite
solar
cells
due
to
their
ideal
bandgap
and
high
charge-carrier
mobility.
However,
poor
crystal
quality
rapid
degradation
in
ambient
conditions
severely
limit
stability
practical
applications.
This
study
demonstrates
that
incorporating
UiO-66,
a
zirconium-based
MOF,
significantly
enhances
the
performance
of
tin
(TPSCs).
The
unique
porous
structure
abundant
carboxylate
groups
UiO-66
improve
crystallinity
film
FASnI₃,
reduce
defect
density,
prolong
charge
carrier
lifetimes.
Consequently,
power
conversion
efficiency
(PCE)
UiO-66-integrated
TPSCs
increases
from
11.43%
12.64%,
devices
maintain
over
90%
initial
PCE
after
100
days
nitrogen
glovebox.
These
findings
highlight
potential
addressing
challenges
perovskites.
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
26(11), P. 6787 - 6798
Published: Jan. 1, 2024
A
green
one-pot
synthetic
strategy
was
proposed
to
design
a
water-compatible
surface
molecularly
imprinted
composite
with
specific
selectivity
and
high
adsorption
capability
for
selective
extraction
of
chlorogenic
acid
from
aqueous
systems.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
This
systematic
and
comprehensive
review
summarizes
the
synthetic
strategies,
structural/compositional
features,
physicochemical
properties,
energy
applications
of
carbon
encapsulated
nanoparticles
as
efficient
electrocatalysts
electrodes.
