Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 21, 2024
The
anion-exchange
membrane
water
electrolyzer
(AEM
electrolyzer)
is
an
advanced
technology
for
the
sustainable
production
of
green
hydrogen.
However,
its
commercialization
has
been
hindered
by
relatively
low
performance,
which
necessitates
use
platinum
group
metal
(PGM)-based
electrocatalysts.
Herein,
we
address
this
challenge
developing
a
composite
material
consisting
non-PGM-based
amorphous
Cu(OH)2
and
ZIF-67.
abundant
defects
in
modification
electronic
structure,
induced
strong
interaction
between
ZIF-67
Cu(OH)2,
significantly
enhance
catalytic
performance
oxygen
evolution
reaction
(OER).
AEM
equipped
with
Cu(OH)2@ZIF-100
demonstrates
higher
(1.75
Vcell
at
1.0
A/cm2)
compared
to
those
using
RuO2
(1.784
reducing
mass
transport
losses
within
electrolyzer.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(15), P. 8694 - 8706
Published: Jan. 1, 2024
Herein,
we
present
Ir-doped
NiFe-LDH
nanosheets
synthesized
via
a
pulsed
laser
irradiation
strategy,
showing
superior
electrocatalytic
OER
kinetics.
We
investigate
the
origin
of
activity
in
NiFeIr-LDH
through
situ
/
operando
Raman
and
DFT
studies.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(8), P. 9244 - 9251
Published: April 17, 2024
RuO2
is
widely
used
as
an
acidic
electrocatalyst
to
achieve
high
catalytic
activity,
but
the
severe
leaching
and
scarcity
of
Ru
element
restrict
application
on
a
large
scale.
Strategies
such
designing
nanostructures
adjusting
metals'
electronic
properties
regulate
adsorption
reaction
intermediates
can
be
for
design
preparation
catalysts.
Herein,
we
designed
acid-treated
RuO2/Co3O4
nanostructure
with
low
content
intimate
heterogeneous
interface
disrupt
trade-off
relationship
between
stability
activity.
The
resulting
displayed
overpotential
152
mV
in
0.5
M
H2SO4
electrolyte,
greatly
exceeding
that
commercial
(221
mV).
Despite
continuous
operation
150
h,
it
still
exhibited
good
degradation
rate
0.67
mV·h–1.
Multiple
characterization
analyses
revealed
electron
transfer
occurs
from
Ruoct
Cooct(III)
sites
through
mutual
O
atoms
RuO2/Co3O4,
which
further
strengthened
by
presence
oxygen
vacancies.
vacancy
synergistically
dispersion,
optimize
(*OOH),
improve
kinetics
evolution
(OER).
This
work
brings
light
significance
vacancies
modulating
structure
nanoparticles
enhancing
Co3O4
support,
thus
highlighting
use
interfacial
engineering
better
OER
catalyst
design.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 2, 2024
Abstract
Perovskite
oxides
are
considered
highly
promising
candidates
for
oxygen
evolution
reaction
(OER)
catalysts
due
to
their
low
cost
and
adaptable
electronic
structure.
However,
modulating
the
structure
of
without
altering
nanomorphology
is
crucial
understanding
structure‐property
relationship.
In
this
study,
a
simple
plasma
bombardment
strategy
developed
optimize
catalytic
activity
perovskite
oxides.
Experimental
characterization
plasma‐treated
LaCo
0.9
Fe
0.1
O
3
(P‐LCFO)
reveals
abundant
vacancies,
which
expose
numerous
active
sites.
Additionally,
X‐ray
photoelectron
spectroscopy
absorption
fine
analyses
indicate
Co
valence
state
in
P‐LCFO,
likely
presence
these
contributes
an
optimized
that
enhances
OER
performance.
Consequently,
P‐LCFO
exhibits
significantly
improved
activity,
with
overpotential
294
mV
at
current
density
10
mA
cm
−2
,
outperforming
commercial
RuO
2
.
This
work
underscores
benefits
engineering
studying
relationships
developing
oxide
water
splitting.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(6), P. 6196 - 6204
Published: March 8, 2024
Developing
a
highly
efficient
catalyst
for
the
oxygen
evolution
reaction
(OER)
is
of
great
significance
its
application
in
electrocatalytic
water
splitting.
Herein,
solid–solid
transformation
strategy
has
been
developed
to
construct
sulfur-doped
Ni0.5Co0.5Fe2O4
spinel
porous
single-crystal
nanosheet
arrays
on
nickel
foam
(S-NCFO/NF).
The
single-crystalline
self-assembled
nanostructures
can
provide
fast
charge
transfer
channels.
With
effect
S-doping,
distorted/incomplete
octahedral
structure
be
formed.
unique
S-NCFO
nanosheets
large
number
active
sites
and
sufficiently
contact
electrolyte
adsorb
OH–
desorb
O2.
By
virtue
nanosheet,
structure,
configurations,
S-NCFO/NF
electrode
exhibits
enhanced
OER
performance
with
low
overpotentials
at
100
mA
cm–2
300
mV
1
M
KOH
317
+
0.5
NaCl.
synthesis
provides
insight
preparation
seawater
ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(20), P. 9121 - 9133
Published: Oct. 8, 2024
The
preparation
of
clean
and
sustainable
renewable
energy
requires
the
development
bifunctional
electrocatalysts
with
high
stability
activity
for
oxygen
evolution
reaction
(OER)
hydrogen
(HER).
Doping
Ga
in
catalyst
can
enhance
catalytic
reaction.
In
this
study,
we
added
different
amounts
to
FeCoNiCuTi
HEAs
make
(FeCoNiCuTi)100–xGax
(x
=
1,
2,
3,
5,
10,
16.67)
a
cost-effective
HER/OER
electrocatalyst
that
showed
excellent
electrocatalytic
alkaline
electrolyte.
At
current
density
10
mA/cm2,
it
has
an
overpotential
47
mV,
Tafel
slope
35.75
mV/dec,
electric
double-layer
capacitance
36.8
mF/cm2,
which
performance
HER
same
density,
OER
is
345.56
33.9
31.24
comparable
overcapacitance
inert
catalyst.
This
makes
highly
efficient
integral
water
splitting.
Density
functional
theory
(DFT)
calculations
have
shown
chemical
complexity
provides
strong
synergistic
effect
changing
electronic
structure.
work
focuses
on
possibility
adding
elements
high-entropy
alloys
HER/OER.
