Industrial & Engineering Chemistry Research,
Journal Year:
2024,
Volume and Issue:
63(47), P. 20553 - 20562
Published: Nov. 13, 2024
In
recent
years,
Fe–N–C
materials
have
been
considered
as
feasible
substitutes
for
platinum-based
catalysts
to
enhance
the
oxygen
reduction
reaction
(ORR).
However,
still
specific
problems,
including
poor
inherent
activity,
restricted
availability
of
active
sites,
and
inferior
stability.
This
work
presents
a
simple
efficient
method
synthesizing
Fe/N
codoped
hierarchical
porous
carbon
nanosheets
using
one-step
pyrolysis.
The
optimized
900
catalyst
exhibits
excellent
ORR
performance
with
an
onset
potential
0.958
V
half-potentials
0.885
in
alkaline
medium,
surpassing
those
commercial
Pt/C
catalyst.
addition,
optimal
demonstrated
improved
stability
great
resistance
methanol.
Furthermore,
zinc-air
battery
constructed
from
shows
remarkable
power
density
163.65
mW
cm–2
capacity
807.80
mA
h
gZn–1.
electrochemical
cycle
were
proven
exceed
400
at
current
5
cm–2.
study
offers
valuable
insights
development
highly
stable
clean
energy
field.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(29), P. 17793 - 17816
Published: Jan. 1, 2024
This
review
summarizes
the
development
(integrated
effects,
classifications,
and
applications)
of
emerging
catalysts
that
integrate
single
atoms
with
nanoparticles
(SA/NPCs).
It
also
highlights
future
challenges
opportunities
in
this
field.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(15), P. 17890 - 17897
Published: Aug. 1, 2024
Cathode
electrocatalysts
with
rich
active
sites
are
indispensable
for
achieving
the
superior
performance
of
zinc–air
batteries
(ZABs).
However,
integration
both
oxygen
reduction
reaction
and
evolution
(ORR
OER)
catalytic
poses
challenges
due
to
their
opposite
mechanisms.
Besides,
a
mass
highly
oxidizing
intermediates
generated
by
OER
site
would
attack
adjacent
ORR
sites.
Herein,
bottom-up
strategy
is
developed
catenate
Co
FeCo
beads
onto
needle
carbon
connexons,
wherein
alloys
undergo
self-reconstruction
into
FeOOH
Co(OH)2
facilitate
OER,
while
separated
nanoparticles
play
crucial
role
in
promoting
ORR.
The
FeCoAL&CoNP/NC
Janus
material
exhibits
significant
potential
stabilizing
its
bifunctional
electrocatalytic
properties,
bestowing
rechargeable
ZABs
long
cycling
stability
(752
h)
as
air–cathode
catalyst.
This
study
paves
pathway
precise
manipulation
distribution
distinct
selective
control
over
electrocatalysts.
Nanomaterials,
Journal Year:
2023,
Volume and Issue:
14(1), P. 16 - 16
Published: Dec. 20, 2023
The
design
of
efficient
oxygen
evolution
reaction
(OER)
electrocatalysts
is
great
significance
for
improving
the
energy
efficiency
water
electrolysis
hydrogen
production.
In
this
work,
low-temperature
fluorination
and
introduction
a
conductive
substrate
strategy
greatly
improve
OER
performance
in
alkaline
solutions.
Cobalt–iron
fluoride
nanosheets
supported
on
reduced
graphene
architectures
are
constructed
by
one-step
solvothermal
method
further
treatment.
can
increase
conductivity
catalysts,
transition
metal
ions
act
as
electron
acceptors
to
reduce
Fermi
level
graphene,
resulting
low
overpotential.
surface
catalyst
becomes
porous
rough
after
fluorination,
which
expose
more
active
sites
performance.
Finally,
exhibits
excellent
catalytic
1
M
KOH,
overpotential
245
mV
with
Tafel
slope
90
dec−1,
better
than
commercially
available
IrO2
catalyst.
good
stability
confirmed
chronoamperometry
(CA)
test
change
chemistry
elucidated
comparing
XPS
before
CA
test.
This
work
provides
new
construct
fluoride-based
materials
boosted
catalysts.
