The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(42), P. 10638 - 10643
Published: Oct. 15, 2024
There
is
a
great
deal
of
interest
in
the
development
electrocatalysts
for
oxygen
evolution
reaction
(OER)
that
are
stable
and
have
high
activity
because
this
anodic
half-reaction
main
bottleneck
water
splitting
other
key
technologies.
Cobalt
iron
oxide
oxyhydroxide
constitute
cheaper
alternative
to
highly
active
commonly
used
Ir-
Ru-based
catalysts.
Most
described
require
tedious
synthetic
expensive
preparation
procedures.
We
report
here
facile
straightforward
an
electrocatalyst
by
combination
commercial
compounds,
such
as
cobalt
chloride
ferrocene.
A
OER
obtained,
which
shows
low
overpotential
alkaline
medium
consequence
synergistic
effect
between
both
compounds
inexpensive.
RSC Advances,
Journal Year:
2025,
Volume and Issue:
15(7), P. 5277 - 5285
Published: Jan. 1, 2025
This
study
demonstrates
the
efficient
removal
of
chlortetracycline
(CTC)
from
water
using
MnFeCu-LDH/GO
activated
PMS,
achieving
91.18%
degradation
within
30
minutes
with
excellent
reusability,
offering
a
sustainable
solution
to
antibiotic
pollution.
The
upsurging
of
cost-effective
de
novo
electrocatalysts
through
the
operando
electro-oxidation
approaches
holds
great
promise
for
scalable
production
green
energy
in
pursuit
sustainability.
This
work
introduces
an
reconstitution
strategy
producing
a
smart
electrocatalyst,
cobalt
"oxyhydroxide"
derived
from
newly
designed
2D
cobalt(II)
metal–organic
framework
(NBU-4)
directly
grown
on
nickel
foam
(NF),
NBU-4/NF@CoOOH.
NBU-4/NF@CoOOH,
exhibits
outstanding
overpotential
76
mV
hydrogen
evolution
reaction
and
336
oxygen
to
achieve
current
density
10
mA/cm2
with
remarkable
Faradaic
efficiencies
97.1
93.4%,
respectively,
1
M
aqueous
KOH.
Unveiling
bifunctionality
NBU-4/NF@CoOOH
as
cathode
anode
overall
water
splitting
KOH,
low
voltage
1.65
V
was
needed
obtain
density.
Nonetheless,
displayed
excellent
stability
12
h
evidenced
chronopotentiometry
recorded
at
mA/cm2.
bifunctional
electrocatalytic
performance
electrocatalyst
50
is
attributed
unique
hexagonal
nanosheet
morphology
microporous
structure
zigzag
flow
channels
NF,
facilitating
faster
kinetics
Co3+
Ni2+
dual
sites
synergism.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 8, 2025
The
pursuit
of
sustainable
energy
solutions
to
address
environmental
challenges
and
crises
has
driven
significant
interest
in
electrocatalytic
water
splitting.
However,
the
efficiency
this
process
is
hindered
by
sluggish
kinetics
anodic
oxygen
evolution
reaction
(OER).
To
overcome
this,
we
synthesized
two
isoreticular
cobalt-based
metal-organic
frameworks
(MOFs),
MOF-74
MOF-274,
with
different
pore
sizes
(16.50
23.37
Å,
respectively),
where
exhibited
stronger
Fe(III)
adsorption
as
a
result
its
confined
nanosized
channels.
Electrochemical
activation
transformed
these
Co-MOF
precatalysts
into
Fe-doped
CoOOH
nanosheets
uniform
elemental
distribution,
enhancing
their
OER
performance.
It
revealed
strengthened
Co-O-Fe
electronic
interactions
MOF-74-Fe
X-ray
photoelectron
spectroscopy
analysis,
MOF-74-Fe-OER
achieved
decent
activity
show
lower
overpotential
288
mV
at
10
mA
cm-2
compared
MOF-274-Fe-OER
(357
mV).
Furthermore,
long-term
stability
tests
confirmed
robust
durability,
retaining
96.9%
initial
performance
over
h.
These
results
underscore
critical
role
pore-engineered
MOF
optimizing
modulation
catalytic
for
oxidation.
