ACS Applied Energy Materials,
Journal Year:
2023,
Volume and Issue:
6(14), P. 7317 - 7322
Published: June 30, 2023
The
commercialization
of
rechargeable
Zn–air
batteries
(ZABs)
relies
heavily
on
the
development
cost-effective
and
highly
durable
bifunctional
electrocatalysts
that
can
promote
both
oxygen
reduction
reaction
(ORR)
evolution
(OER).
Transition-metal
phosphides-based
carbon
(TMPs/C)
composites
have
recently
been
acknowledged
as
efficient
catalysts,
yet
successful
construction
TMPs/C
still
remains
a
formidable
challenge.
Here,
we
report
dots
(CDs)-assisted
approach
to
efficiently
fabricate
CoP/C
nanocomposites
with
fine
microstructures
acting
active
electrocatalyst
for
ORR
OER.
CDs
act
stable
platform
adsorb
immobilize
Co
precursors,
obstructing
coalescence
small
CoP
particles
during
pyrolysis
eventually
ensuring
formation
microstructure,
where
carbon-encapsulated
dense
are
uniformly
distributed
nanosheets
(CoP@C/CNSs).
ZAB
assembled
using
CoP@C/CNSs
electrode
expresses
excellent
performance
high
power
density
180.1
mW
cm–2,
relatively
specific
capacity
(916
mA
h
g–1),
long
cycling
life
over
80
at
10
cm–2.
catalyst
such
configuration
is
anticipated
provide
practical
solution
production
storage
clean
energy.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 2, 2025
MFCO
spinel
anchored
on
N-rGO
is
synthesized
by
a
two-step
hydrothermal
method
as
bifunctional
electrocatalyst.
Its
physicochemical
properties
have
been
characterized
and
tested,
it
applied
to
zinc-air
batteries.
The
experimental
theoretical
calculations
show
that
the
uniformly
distributed
surface
of
N-rGO.
When
conducting
N-rGO,
synergistic
effect
occurs
between
Co-N
bonds,
which
changes
arrangement
C-N
bonds
from
sp2
orientation
sp3
form.
ORR
catalytic
pathway
MFCO/N-rGO
electrocatalyst
dominated
4-electron
transfer,
with
half-wave
potential
0.8003
V,
an
overpotential
value
352
mV,
small
difference
(ΔE
=
0.78
V).
With
charge/discharge
voltage
about
0.88
gap
remains
almost
unchanged
for
long
period
after
650
h,
showing
excellent
stability.
improved
performance
attributed
Co
acting
active
site,
doping
induces
Jahn-Teller
effect,
alters
electronic
structure
spinel,
shifts
d-band
center
upward,
enhances
adsorption
oxygen
intermediates,
promotes
electrocatalytic
reaction.
This
study
provides
low-cost
promising
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(10), P. 7332 - 7344
Published: April 25, 2024
The
high
conductivity
and
low
decomposition
potential
of
LiOH
as
the
discharge
product
in
Li–O2
batteries
have
garnered
significant
attention.
However,
challenges
remain
developing
LiOH-based
promoting
efficient
generation/decomposition
LiOH.
Here,
we
propose
a
strategy
to
build
binder-free
cathode
for
by
embedding
atomically
dispersed
Ru
onto
surface
MnCo2O4
(RuSA-MnCo2O4)
through
defect
engineering
adsorption–deposition
methods,
harnessing
synergistic
benefits
spinel
single
atom
terms
catalytic
activity
physical
structure.
leads
slight
lattice
distortion
electron
enrichment
near
Co,
breaking
long-range
ordered
symmetrical
structure
transforming
Mn/Co
low-activity
centers
into
asymmetrical
Ru–O–Co
high-activity
centers.
Compared
that
MnCo2O4,
d-band
center
RuSA-MnCo2O4
is
positioned
further
away
from
Fermi
level,
resulting
an
increased
occupancy
antibonding
orbitals.
This
more
moderate
adsorption
energies
LiO2*
LiOH*,
well
reduction
reaction
barrier
formation,
thereby
optimizing
kinetics
redox
reactions.
Thanks
active
regulated
RuSA,
electrochemical
performances
were
greatly
improved,
which
also
provides
clever
approach
development
catalysts
batteries.
