Unlocking Peak Efficiency in Anion‐Exchange Membrane Electrolysis with Iridium‐Infused Ni/Ni2P Heterojunction Electrocatalysts
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 29, 2025
Abstract
Developing
cost‐effective,
highly
efficient,
and
durable
bifunctional
electrocatalysts
for
water
electrolysis
remains
a
significant
challenge.
Nickel‐based
materials
have
shown
promise
as
catalysts,
but
their
efficiency
in
alkaline
electrolytes
is
still
lacking.
Fascinatingly,
Mott–Schottky
catalysts
can
fine‐tune
electron
density
at
interfaces,
boosting
intermediate
adsorption
facilitating
desorption
to
reduce
the
energy
barrier.
In
this
study,
iridium‐implanted
Ni/Ni
2
P
nanosheets
(Ir
SA
–Ni/Ni
P)
introduced,
which
are
delivered
from
metal–organic
framework
employ
them
devices.
This
catalyst
requires
small
54
mV
overpotential
hydrogen
evolution
reaction
(HER)
192
oxygen
(OER)
reach
10
mA·cm
−2
1.0
m
KOH
electrolyte.
Density
functional
theory
(DFT)
calculations
reveal
that
incorporation
of
Ir
atoms
with
enriched
interfaces
between
Ni
promote
active
sites
be
favorable
HER
OER.
discovery
highlights
most
likely
reactive
offers
valuable
blueprint
designing
efficient
stable
tailored
industrial‐scale
electrolysis.
The
‐Ni/Ni
electrode
exhibits
exceptional
current
outstanding
stability
single‐cell
anion‐exchange
membrane
electrolyzer.
Language: Английский
Rational Design of Ultrahigh‐Loading Ir Single Atoms on Reconstructed Mn─NiOOH for Enhanced Catalytic Performance in Urea‐Water Electrolysis
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 28, 2024
Abstract
Investigating
advanced
electrocatalysts
is
crucial
for
improving
the
efficacy
of
water
splitting
to
generate
environmentally
friendly
fuel.
The
discovery
highly
effective
electrocatalysts,
capable
driving
oxygen
evolution
reaction
(OER)
and
urea
oxidation
(UOR)
in
urea‐alkaline
environments,
pivotal
advancing
large‐scale
hydrogen
production.
This
study
aims
introduce
a
new
method
that
involves
creating
nanosheets
high‐loading
iridium
single
atoms
embedded
manganese‐containing
nickel
oxyhydroxide
matrix
(Ir@Mn─NiOOH).
These
nanostructures
are
derived
from
self‐supported
hydrate
pre‐catalyst
grown
on
foam
then
activated
through
electrochemical
etching
pretreatment.
Ir@Mn─NiOOH
nanoarchitecture
displays
outstanding
electrocatalytic
activity,
having
low
overpotential
just
258
mV
potential
1.319
V
(at
10
mA
cm
−2
)
OER
UOR,
respectively.
Such
extraordinary
catalytic
characteristics
mainly
owing
strong
synthetic
electronic
interaction
between
Ir
Mn─NiOOH,
which
can
change
its
boost
sites.
research
presents
way
produce
exceptionally
efficient
catalysts
by
adding
synergistic
effect
complex
multi‐electron
processes.
Language: Английский