ABSTRACT
Fabrication
of
hierarchical
porous
structure
two-dimensional
layered
double
hydroxides
(LDHs)
materials
still
faces
high
challenges,
especially
the
precise
modulations
lamellar
metals
and
interlayer
anions.
Herein,
in
order
to
overcome
slow
kinetics
water
oxidation
reaction
which
requires
efficient
electrocatalysts
for
oxygen
evolution
(OER),
a
nanocomposite
assembled
by
foam
nickel
(NF)
supported
borate
anions
incorporated
bimetallic
NiCo
hydrotalcite
(NiCo-BLDH)
on
surface
phosphide
sheets
(NF/Ni2P@NiCo-BLDH)
is
prepared
as
an
electrocatalyst
through
NF
in-situ
phosphating
electrodeposition
approach.
Experimental
investigations
indicate
that
introducing
multi-phase
into
transition
metal
LDHs
can
regulate
their
properties,
enhance
adsorption
efficiency
OH-,
thereby
enhancing
OER
activity.
Remarkably,
NF/Ni2P@NiCo-BLDH
electrode
shows
low
overpotential
293
mV
at
100
mA
cm−2
Tafel
slope
108.3
dec−1
1.0
M
KOH
medium,
smaller
than
most
previously
reported
NiCo-based
catalysts.
However,
NF/Ni2P
exhibits
more
hydrogen
medium
compared
electrode.
This
work
may
push
forward
catalytic
activity
NiCo-LDH-based
provide
new
idea
large-scale
electrocatalytic
splitting.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
The
core
of
clean
energy
technologies
such
as
fuel
cells,
water
electrolyzers,
and
metal-air
batteries
depends
on
a
series
oxygen
hydrogen-based
electrocatalysis
reactions,
including
the
reduction
reaction
(ORR),
evolution
(OER)
hydrogen
(HER),
which
necessitate
cost-effective
electrocatalysts
to
improve
their
efficiency.
In
recent
decade,
complex
metal
oxides
(beyond
simple
transition
oxides,
spinel
ABO
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(34), P. 22597 - 22608
Published: Jan. 1, 2024
A
facile,
rapid
Joule
heating
protocol
for
forming
amorphous-structured
transition
metal
phosphate
electrocatalysts
with
low
overpotentials,
fast
kinetics,
and
long-term
stability
oxygen
evolution
reaction
(OER).
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(8), P. 3175 - 3184
Published: Feb. 13, 2024
Incorporating
amorphous
and
crystalline
components
is
undoubtedly
a
strategy
to
learn
from
each
other's
strengths
complement
weaknesses
for
advanced
electrocatalysts.
Here,
an
efficient
stable
oxygen
evolution
reaction
(OER)
catalyst
with
amorphous/crystalline
interface
reported.
Specifically,
rapid
coprecipitation
approach
proposed
load
FePO4
nanoparticles
onto
NH4CoPO4·H2O
nanosheets,
resulting
in
fascinating
interface.
The
prominent
coupled
effect
between
afforded
by
the
interfacial
phosphates,
which
build
channels
transfer
electrons
Co
Fe.
Besides
unique
electronic
structure,
hybrid
facilitates
formation
of
highly
active
intermediates
accelerates
kinetics
charge
transport.
Detailed
electrochemical
characterization
reveals
that
this
advantageous
structure
results
notable
decrease
overpotential
OER
compared
materials
phase
or
alone.
FePO4/NH4CoPO4·H2O
exhibits
small
only
230
mV
achieve
current
density
10
mA
cm–2
1
M
KOH
220
at
0.1
phosphate-buffered
solution
(PBS),
are
much
lower
than
corresponding
values
pristine
ones.
It
envisioned
operable
amorphous–crystalline
may
open
up
new
opportunities
rational
design
Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(13), P. 6475 - 6488
Published: June 18, 2024
Heterometal
phosphates
are
burgeoning
electrocatalysts
and
cathode
materials
in
energy
storage
conversion
devices.
In
this
work,
we
demonstrate
a
novel
clean
synthetic
route
for
substoichiometric
lithium-deficient
metastable
Cmcm-Li0.65(7)Co1.16(2)PO4
(Li-Co-P-HEX)
metaphosphate
P212121-LiCo(PO3)3
(Li-Co-P-BT),
starting
from
the
same
material
[LiCo(dtbp)3]
(dtbp
=
di-tert-butyl
phosphate)
through
thermolytic
single-source
precursor
approach.
The
heterometal
organophosphate
decomposed
into
different
phases
of
inorganic
by
employing
solution
solid-state
thermal
treatment.
solution-processed
Li-deficient
orthophosphate
exhibits
superior
oxygen
evolution
reaction
activity,
delivering
current
density
10
mA
cm–2
at
an
overpotential
294
mV,
outperforming
other
reported
lithium–cobalt
water
oxidation.
enhanced
performance
as
electrocatalyst
elucidates
synergistic
effect
generated
structure,
composition,
morphology.
