Catalysts,
Journal Year:
2024,
Volume and Issue:
14(9), P. 626 - 626
Published: Sept. 17, 2024
The
oxygen
evolution
reaction
(OER)
stands
out
as
a
key
electrochemical
process
for
the
conversion
of
clean
energy.
However,
practical
implementation
OER
is
frequently
impeded
by
its
slow
kinetics
and
necessity
scarce
expensive
noble
metal
catalysts.
High-entropy
transition
sulfides
(HETMS)
stand
at
forefront
catalysts,
renowned
their
exceptional
catalytic
performance
diversity.
Herein,
we
have
synthesized
HETMS
catalyst,
(FeCoNiCuMn50)S2,
encapsulated
within
carbon
nanofibers
through
one-step
involving
synergistic
application
electrospinning
chemical
vapor
deposition.
By
precisely
controlling
doping
levels
sulfur,
demonstrated
that
sulfur
incorporation
significantly
increases
exposed
surface
area
alloy
particles
on
optimizes
electronic
configuration
elements.
These
findings
reveal
instrumental
in
substantial
improvement
catalyst’s
performance.
Notably,
catalyst
showed
optimal
activity
sulfur-to-metal
atom
ratio
2:1,
delivering
an
overpotential
254
mV
current
density
10
mA
cm−2
1.0
M
KOH
solution.
Furthermore,
(FeCoNiCuMn50)S2
exhibited
remarkable
stability,
underscoring
potential
efficient
robust
electrocatalyst
sustainable
energy
applications.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 22, 2025
Electrocatalytic
water
splitting
is
a
clean
and
feasible
method
for
hydrogen
production,
expected
to
become
key
technology
meeting
energy
demands.
Transition
metal-based
nanoparticles,
including
single-atom
catalysts
their
compounds,
are
widely
used
in
electrocatalytic
splitting,
but
they
often
suffer
from
issues
like
easy
agglomeration
poor
conductivity.
The
integration
of
these
nanoparticles
with
three-dimensional
(3D)
graphene
enhances
conductivity
prevents
agglomeration,
while
improving
the
adsorption
desorption
rates
reactants
intermediates
on
catalyst
surface
during
thereby
boosting
efficiency.
This
paper
reviews
preparation
methods
graphene-based
supported
electrocatalysts
applications
oxygen
evolution
reactions
(OERs),
further
discussing
mechanism
by
which
3D
improves
OER
performance.
ChemistrySelect,
Journal Year:
2025,
Volume and Issue:
10(10)
Published: March 1, 2025
Abstract
To
find
nonprecious
metal
high‐entropy
alloy
nanoparticles
(HEA‐NPs)
electrocatalysts
that
perform
even
better
in
electrolytic
water
OER
and
to
learn
more
about
the
reasons
for
their
superior
performance.
This
experiment
successfully
prepared
nanocatalysts
Al
0.3
Cu
0.1
(CoCrNi‐X)
0.6
(X
=
Mo,
Ti
V)
by
simple
mechanical
ball
milling.
The
electrocatalyst
(CoCrNiMo)
exhibits
excellent
reaction
kinetics,
with
an
overpotential
of
only
243
mV
a
Tafel
slope
191.59
mV·dec
−1
at
current
density
10
mA·cm
−2
.
It
also
has
low
impedance
hinders
charge
transfer
during
catalysis
can
maintain
catalytic
stability
over
50
h.
activity
than
other
three
catalysts,
which
is
attributed
fine
nanostructure
complex
duplex
crystal
structure
(FCC
+
BCC),
resulting
specific
surface
area
having
active
sites
as
well
synergistic
promotion
Mo
elements,
was
most
conducive
accelerating
OER.
indicates
element
optimal
doping
among
above
followed
V
Ti,
significant
field
catalytically
elements
nanostructured
HEA
electrodes
enhance
performance
catalysts
energy
conservation.
