Energy & Fuels,
Год журнала:
2024,
Номер
38(5), С. 4504 - 4515
Опубликована: Фев. 7, 2024
Discovering
cost-effective,
durable,
and
economical
electrocatalysts
for
the
lattice
oxygen-
mediated
mechanism
(LOM)-based
oxygen
evolution
reaction
(OER)
under
acidic
conditions
is
essential
advancing
commercialization
of
electrochemical
water-splitting
devices.
In
this
study,
we
effectively
constructed
a
distinctive
petal-like
nanoflake
(NFls)
structure
by
introducing
ruthenium
(Ru)
into
NiM
(M
=
Fe,
Co)
metal–organic
framework
(MOF)
on
nickel
foam
(NFo)
substrate
through
straightforward
in
situ
conversion
process
layered
double
hydroxides
(LDHs).
Utilizing
unique
properties
material,
Ru-doped
NiFe-BDC/NFo
exhibited
an
impressively
low
overpotential
∼247
mV
at
current
density
10
mA
cm–2
when
operating
environment
OER.
Most
notably,
our
champion
catalysts
displayed
exceptional
long-term
stability
during
continuous
operation
20
h
0.5
M
H2SO4,
positioning
them
as
some
top
conditions.
The
catalytic
performance
Co)-BDC/NFo
can
be
ascribed
to
introduction
Ru
LDH
MOF.
This
transformation
significantly
enhances
kinetics
facilitates
charge
transfer,
ultimately
resulting
attainment
optimal
activity
research
introduces
novel
category
OER
conditions,
which
has
been
relatively
underexplored.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(1)
Опубликована: Ноя. 23, 2023
Seawater
electrolysis
is
an
attractive
way
of
making
H2
in
coastal
areas,
and
NiFe-based
materials
are
among
the
top
options
for
alkaline
seawater
oxidation
(ASO).
However,
ample
Cl-
can
severely
corrode
catalytic
sites
lead
to
limited
lifespans.
Herein,
we
report
that
situ
carbon
oxyanion
self-transformation
(COST)
from
oxalate
carbonate
on
a
monolithic
NiFe
micropillar
electrode
allows
safeguard
high-valence
metal
reaction
ASO.
In
situ/ex
studies
show
spontaneous,
timely,
appropriate
COST
safeguards
active
against
attack
during
ASO
even
at
ampere-level
current
density
(j).
Our
catalyst
shows
efficient
stable
performance,
which
requires
overpotential
as
low
349
mV
attain
j
1
A
cm-2
.
Moreover,
with
protective
surface
CO32-
exhibits
slight
activity
degradation
after
600
h
under
seawater.
This
work
reports
effective
design
concepts
level
self-transformation,
acting
momentous
step
toward
defending
seawater-to-H2
conversion
systems.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
12(2), С. 634 - 656
Опубликована: Дек. 2, 2023
This
review
summarizes
advances
in
bifunctional
electrocatalysts
and
electrolyzers
for
seawater
splitting,
including
various
catalysts
(
e.g.
,
phosphides,
chalcogenides,
borides,
nitrides,
(oxy)hydroxides)
membrane-based/membrane-less
systems.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(5), С. 2680 - 2684
Опубликована: Янв. 1, 2024
Three-dimensional
porous
NiCoP
foam
supported
on
Ni
is
a
superb
bifunctional
electrocatalyst
for
overall
seawater
splitting,
attaining
large
current
density
of
1000
mA
cm
−2
at
low
cell
voltage
1.97
V
with
robust
stability
over
300
hours.
Abstract
Renewable
electricity‐driven
seawater
splitting
presents
a
green,
effective,
and
promising
strategy
for
building
hydrogen
(H
2
)‐based
energy
systems
(e.g.,
storing
wind
power
as
H
),
especially
in
many
coastal
cities.
The
abundance
of
Cl
−
seawater,
however,
will
cause
severe
corrosion
anode
catalyst
during
the
electrolysis,
thus
affect
long‐term
stability
catalyst.
Herein,
oxidation
performances
NiFe
layered
double
hydroxides
(LDH),
classic
oxygen
(O
)
evolution
material,
can
be
boosted
by
employing
tungstate
(WO
4
2–
intercalated
guest.
Notably,
insertion
WO
2−
to
LDH
layers
upgrades
reaction
kinetics
selectivity,
attaining
higher
current
densities
with
≈100%
O
generation
efficiency
alkaline
seawater.
Moreover,
after
350
h
test
at
1000
mA
cm
−2
,
only
trace
active
chlorine
detected
electrolyte.
Additionally,
follows
lattice
mechanism
on
.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Июль 23, 2024
Abstract
It
is
vital
to
explore
effective
ways
for
prolonging
electrode
lifespans
under
harsh
electrolysis
conditions,
such
as
high
current
densities,
acid
environment,
and
impure
water
source.
Here
we
report
alternating
approaches
that
realize
promptly
regularly
repair/maintenance
concurrent
bubble
evolution.
Electrode
are
improved
by
co-action
of
Fe
group
elemental
ions
alkali
metal
cations,
especially
a
unique
Co
2+
-Na
+
combo.
A
commercial
Ni
foam
sustains
ampere-level
densities
alternatingly
during
continuous
93.8
h
in
an
acidic
solution,
whereas
completely
dissolved
~2
conventional
conditions.
The
work
not
only
explores
electrolysis-based
system,
cation-based
catalytic
systems,
electrodeposition
techniques,
beyond,
but
demonstrates
the
possibility
prolonged
repeated
deposition-dissolution
processes.
With
enough
adjustable
experimental
variables,
upper
improvement
limit
lifespan
would
be
high.
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(5), С. 1885 - 1893
Опубликована: Янв. 1, 2024
The
intervening
Se
induces
the
structural
asymmetricity
of
Ru-S
6
octahedrons
and
then
regulates
electronic
structure
active
Ru
site,
which
possesses
excellent
acid
water
oxidation
performance
as
an
Ir-free
catalyst.
