Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(14)
Published: Jan. 3, 2024
Abstract
Despite
of
urgent
needs
for
highly
stable
and
efficient
electrochemical
water‐splitting
devices,
it
remains
extremely
challenging
to
acquire
oxygen
evolution
reaction
(OER)
electrocatalysts
under
harsh
industrial
conditions.
Here,
a
successful
in
situ
synthesis
FeCoNiMnCr
high‐entropy
alloy
(HEA)
oxide
(HEO)
heterocatalysts
via
Cr‐induced
spontaneous
reconstruction
strategy
is
reported,
demonstrated
that
they
deliver
excellent
ultrastable
OER
electrocatalytic
performance
with
low
overpotential
320
mV
at
500
mA
cm
−2
negligible
activity
loss
after
maintaining
100
240
h.
Remarkably,
the
heterocatalyst
holds
outstanding
long‐term
stability
condition
6
m
KOH
85
°C
current
density
as
high
over
Density
functional
theory
calculations
reveal
formation
HEA‐HEO
heterostructure
can
provide
electroactive
sites
possessing
robust
valence
states
guarantee
process,
leading
enhancement
electroactivity.
The
findings
such
conditions
offer
new
perspective
designing
constructing
practical
water
splitting.
Deleted Journal,
Journal Year:
2023,
Volume and Issue:
2, P. e9120056 - e9120056
Published: Feb. 25, 2023
Iridium
(Ir)-based
catalysts
are
highly
efficient
for
the
anodic
oxygen
evolution
reaction
(OER)
due
to
high
stability
and
anti-corrosion
ability
in
strong
acid
electrolyte.
Recently,
intensive
attention
has
been
directed
novel,
efficient,
low-cost
Ir-based
overcome
challenges
of
their
application
water
electrolysis
technique.
To
make
a
comprehensive
understanding
recently
developed
catalytic
properties,
mechanism
promotion
principles
were
discussed
OER
condition
aimed
proton
exchange
membrane
electrolyzer
(PEMWE)
this
review.
The
mechanisms
adsorbate
lattice
first
presented
easy
mechanism;
brief
perspective
analysis
from
aspects
geometric
effect,
electronic
synergistic
defect
engineering,
support
effect
was
concluded.
Then,
latest
progress
practical
introduced
detail,
which
classified
into
varied
composition
Ir
catalyst
terms
alloys,
hetero-element
doping,
perovskite,
pyrochlore,
heterostructure,
core–shell
structure,
supported
catalysts.
Finally,
problems
faced
by
current
acidic
electrolyte
put
forward.
It
is
concluded
that
with
low
loading
should
be
future,
paid
probing
structural
performance
correlation,
real
PEMWE
devices.Hopefully,
effort
can
helpful
catalysis
OER,
instructive
novel
design
fabrication.
Journal of Materials Chemistry A,
Journal Year:
2023,
Volume and Issue:
11(11), P. 5476 - 5494
Published: Jan. 1, 2023
The
oxygen
evolution
reaction
(OER),
as
an
essential
process
in
water
decomposition
and
air
batteries,
has
received
increasing
attention
the
context
of
clean
energy
production
efficient
storage.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(14)
Published: Jan. 3, 2024
Abstract
Despite
of
urgent
needs
for
highly
stable
and
efficient
electrochemical
water‐splitting
devices,
it
remains
extremely
challenging
to
acquire
oxygen
evolution
reaction
(OER)
electrocatalysts
under
harsh
industrial
conditions.
Here,
a
successful
in
situ
synthesis
FeCoNiMnCr
high‐entropy
alloy
(HEA)
oxide
(HEO)
heterocatalysts
via
Cr‐induced
spontaneous
reconstruction
strategy
is
reported,
demonstrated
that
they
deliver
excellent
ultrastable
OER
electrocatalytic
performance
with
low
overpotential
320
mV
at
500
mA
cm
−2
negligible
activity
loss
after
maintaining
100
240
h.
Remarkably,
the
heterocatalyst
holds
outstanding
long‐term
stability
condition
6
m
KOH
85
°C
current
density
as
high
over
Density
functional
theory
calculations
reveal
formation
HEA‐HEO
heterostructure
can
provide
electroactive
sites
possessing
robust
valence
states
guarantee
process,
leading
enhancement
electroactivity.
The
findings
such
conditions
offer
new
perspective
designing
constructing
practical
water
splitting.
