Iron-based
single-atom
catalysts
(SACs)
are
considered
to
the
most
promising
replace
Pt
for
efficient
oxygen
reduction
reaction
(ORR).
However,
precise
synthesis
of
high-performance
SACs
and
understanding
their
ORR
origin
remain
challenging.
In
this
work,
microporous
nitrogen-doped
carbon
with
abundant
accessible
atomically
dispersed
N-coordinated
Fe
sites
(Fe-N-C)
is
prepared
by
molecular-confined
coupling
pyrolysis
strategy.
The
Fe-N-C
exhibits
excellent
activities
in
acid
(E1/2
0.78
V
vs.
RHE)
alkaline
0.91
electrolytes.
When
integrated
into
a
rechargeable
aqueous
Zinc-air
battery
(ZAB),
both
large
specific
capacity
(770
mAh
g−1)
high
peak
power
density
(240
mW
cm-2)
achieved.
Remarkably,
as-prepared
ZAB
presents
amazing
charge-discharge
cycle
performance
1600
h
at
current
density,
which
52.5
times
that
using
Pt/C+RuO2.
Furthermore,
all-solid-state
delivers
ultra-robust
cycling
stability
even
under
bending.
This
work
may
advance
critical
step
towards
design
rational
controlled
preparation
remarkable
ultra-stable
catalysts.
Batteries & Supercaps,
Journal Year:
2024,
Volume and Issue:
7(11)
Published: Aug. 15, 2024
Abstract
Rechargeable
Zn‐air
batteries
offer
the
advantages
of
environmental
friendliness,
safety,
low
prices
and
high
energy
density,
are
highly
valued.
However,
major
challenge
faced
by
rechargeable
nowadays
is
efficiency
due
to
slow
reaction
kinetics
electrocatalyst
at
air
cathode.
Bifunctional
catalysts
key
development
improving
their
overall
performance
long‐term
cycling
stability.
Metal‐organic
framework
(MOF)
materials
have
shown
great
benefits
as
oxygen
electrocatalysts
in
promoting
reduction
(ORR)
evolution
(OER).
This
paper
reviews
recent
advances
three
kinds
MOF
bifunctional
for
batteries.
Additionally,
this
also
discusses
synthetic
design
strategy
composite
derivatives,
concludes
suggesting
application
field
Water,
Journal Year:
2024,
Volume and Issue:
16(18), P. 2586 - 2586
Published: Sept. 12, 2024
This
study
developed
a
new
system
for
removing
antibiotics
using
UV/ZIF-67
(Co)-activated
peroxymonosulfate.
The
presence
of
antibiotic
organic
pollutants
in
urban
sewage
presents
substantial
challenge
treatment
technologies.
Due
to
the
persistent
chemical
stability
antibiotics,
their
low
environmental
concentrations,
and
resistance
degradation,
effectively
residual
remains
significant
issue
wastewater
treatment.
introduces
an
eco-friendly
photocatalytic
technology
designed
enhance
removal
oxytetracycline
(OTC)
from
municipal
(Co)/PMS
system.
results
showed
that
compared
with
UV,
UV/PMS,
ZIF-67
(Co),
(Co)/PMS,
(Co)
systems,
had
highest
OTC
rate.
When
10
mg
1
mM
PMS
were
applied
100
mL
30
mg/L
solution,
degradation
efficiency
reached
87.73%
under
400
W
ultraviolet
light.
Increasing
dosage
can
improve
rate
OTC,
but
marginal
benefit
additional
is
reduced.
was
observed
at
weakly
acidic
pH,
which
may
be
due
potential
damage
internal
structure
catalyst
reduced
performance
extreme
pH
conditions.
influence
chloride
ions
nitrate
on
reaction
minimal,
while
bicarbonate
exhibit
inhibitory
effect
OTC.
exhibits
adaptability
various
water
sources,
including
tap
water,
Guitang
River
pure
water.
free
radical
identification
indicate
hydroxyl
sulfate
groups
system,
both
play
important
roles
offers
valuable
insights
technical
support
green,
efficient,
environmentally
friendly
wastewater.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(8), P. 7218 - 7230
Published: April 2, 2024
Oxygen
evolution
reaction
(OER)
impedes
the
electrochemical
water
splitting
for
H2
production,
ascribing
to
depressed
kinetics
of
four
proton-coupled
transfer
process.
Transition
metal
oxides,
especially
bimetallic
have
been
proven
be
promising
OER
electrocatalysts
due
their
part
unoccupied
d-band
characteristics.
More
interestingly,
oxygen
vacancies
(Ov)
easily
constructed
in
transition
oxides
can
modulate
electron
structures
and
thereby
boost
performance.
However,
most
synthesized
processes
involving
vacancy
engineering,
such
as
atom
dopant,
chemical/electrochemical
reduction,
H2/Ar-dependent
calcination,
are
energy-intensive
time-consuming,
largely
hampering
commercial
applications.
Herein,
we
suggest
a
simple
facile
strategy
fabricating
double
spinel
with
abundant
by
calcinating
Ni/Fe@ZIF-67/CC
precursor
under
nonoxidation
condition.
The
obtained
Ov-CF1N2O@NC/CC-550
vast
exhibits
excellent
performance,
representing
lower
overpotential
185
mV
at
10
mA
cm–2,
smaller
Tafel
slope
47.3
dec–1,
well
faster
interface
(Rct
=
0.7336).
Theoretical
calculations
further
confirm
that
activity
strongly
corresponds
center
active
sites
on
Ov-CoFe2O4
(311)
model
decreased
Gibbs
energy
barrier.
work
might
shed
light
engineering
via
inspire
smart
design
multimetallic
oxide
high
