ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(12), P. 15533 - 15544
Published: March 15, 2023
The
rational
design
of
highly
efficient
and
stable
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
is
an
urgent
need
but
remains
challenging
various
sustainable
energy
systems.
How
to
adjust
atomic
structure
electronic
active
center
a
key
bottleneck
problem.
Accelerating
electron
transfer
process
deep
self-reconstruction
sites
could
be
cost-effective
strategy
toward
electrocatalytic
OER
catalyst
development.
Here,
crystalline-amorphous
(c-a)
coupled
Ni3S2/NiPx
electrocatalyst
self-supported
on
nickel
foam
with
intimate
interface
was
developed
via
feasible
solvothermal-electrochemistry
method.
coupling
crystalline
high
conductivity
amorphous
numerous
potential
regulate
optimize
adsorption/desorption
O-containing
species,
ultimately
resulting
in
catalytic
performance.
obtained
Ni3S2/NiPx/NF
presents
low
overpotential
265
mV
obtain
10
mA·cm-2
small
Tafel
slope
51.6
mV·dec-1.
Also,
exhibited
significantly
enhanced
long-term
stability
compared
other
two
catalysts,
<5%
decay
activity
over
20
h
continuous
operation,
while
that
Ni3S2/NF
NiPx/NF
decreased
by
about
30
50%,
respectively.
This
study
provides
inspiration
conversion
reactions
optimizing
performance
catalysts
structures.
Carbon Energy,
Journal Year:
2023,
Volume and Issue:
5(12)
Published: April 25, 2023
Abstract
Sustainable
production
of
H
2
through
electrochemical
water
splitting
is
great
importance
in
the
foreseeable
future.
Transition‐metal
metaphosphates
(TMMPs)
have
a
three‐dimensional
(3D)
open‐framework
structure
and
high
content
P
(which
exists
as
PO
3
−
),
therefore
been
recognized
highly
efficient
catalysts
for
oxygen
evolution
reaction
(OER)
bottleneck
splitting.
Furthermore,
TMMPs
can
also
contribute
to
hydrogen
(HER)
alkaline
neutral
media
by
facilitating
dissociation,
thus,
overall
be
achieved
using
this
kind
material.
In
timely
review,
we
summarize
recent
advances
synthesis
their
applications
OER
HER.
We
present
brief
introduction
synthetic
strategies
first
two
parts.
Then,
review
latest
progress
made
research
on
OER,
HER,
water‐splitting
electrocatalysts.
part,
intrinsic
activity
well
current
strategy
improving
catalytic
will
discussed
systematically.
Finally,
future
opportunities
remaining
challenges
application
electrocatalysis
field.
Small,
Journal Year:
2024,
Volume and Issue:
20(23)
Published: Jan. 2, 2024
Abstract
Construction
of
heterojunctions
is
an
effective
strategy
to
enhanced
electrocatalytic
oxygen
evolution
reaction
(OER),
but
the
structural
active
phases
and
synergistic
mechanism
still
lack
in‐depth
understanding.
Here,
FeOOH/Ni
3
S
2
heterostructure
supported
on
nickel
foam
(NF)
through
a
two‐step
hydrothermal‐chemical
etching
method
reported.
In
situ
Raman
spectroscopy
study
surface
reconstruction
behaviors
/NF
indicates
that
Ni
can
be
rapidly
converted
NiOOH,
accompanied
by
phase
transition
from
α
‐FeOOH
β
during
OER
process.
Importantly,
deep
analysis
Ni─O
bond
reveals
FeOOH
regulate
lattice
disorder
NiOOH
for
improved
catalytic
activity.
Density
functional
theory
(DFT)
calculations
further
confirm
NiOOH/FeOOH
possess
strengthened
adsorption
O‐containing
intermediates,
as
well
lower
energy
barrier
toward
OER.
As
result,
exhibits
promising
activity
stability
in
alkaline
conditions,
requiring
overpotential
268
mV
@
100
mA
cm
−2
long‐term
over
200
h
at
current
density
.
This
work
provides
new
perspective
understanding
heterogeneous
electrocatalysts
ACS Applied Materials & Interfaces,
Journal Year:
2022,
Volume and Issue:
14(41), P. 46374 - 46385
Published: Oct. 4, 2022
Metal-organic
frameworks
(MOFs)
are
considered
potential
electrocatalysts
for
efficient
water
splitting.
However,
the
structure-activity
relationship
of
most
MOFs
is
not
systematically
analyzed
electrocatalysis
anodes
and
cathodes.
In
this
paper,
we
provide
a
strategy
to
modulate
electronic
microstructure
iron-based
bimetallic
(MFe-BDC
(M:
Mg,
Zn,
Cd))
grown
on
nickel
foam
(NF)
as
bifunctional
oxygen
evolution
reaction
(OER)
hydrogen
(HER).
The
optimal
CdFe-BDC
via
modulating
appropriate
metal
cations
IIA
IIB
possesses
excellent
OER
HER
performance
with
lowest
overpotentials
290
mV
at
100
mA
cm-2
148
10
cm-2,
respectively.
overall
splitting
as-prepared
requires
1.68
V
achieve
current
density
in
real
seawater
media,
it
exhibits
competitive
H2
O2
production
rates
6.4
3.1
μL
s-1,
respectively,
ambient
alkaline
conditions,
suggesting
its
practical
applications.
Density
functional
theory
(DFT)
calculations
demonstrate
between
electrocatalytic
MFe-BDC.
This
work
emphasizes
significance
tailoring
environment.
ACS Nano,
Journal Year:
2022,
Volume and Issue:
16(12), P. 19913 - 19939
Published: Nov. 18, 2022
The
replacement
of
powdery
catalysts
with
self-supporting
alternatives
for
catalyzing
various
electrochemical
reactions
is
extremely
important
the
large-scale
commercial
application
renewable
energy
storage
and
conversion
technologies.
Metal-organic
framework
(MOF)-based
nanoarrays
possess
tunable
compositions,
well-defined
structure,
abundant
active
sites,
effective
mass
electron
transport,
etc.,
which
enable
them
to
exhibit
superior
electrocatalytic
performance
in
multiple
reactions.
This
review
presents
latest
research
progress
developing
MOF-based
electrocatalysis.
We
first
highlight
structural
features
advantages
nanoarrays,
followed
by
a
detailed
summary
design
synthesis
strategies
then
describe
recent
their
Finally,
challenges
perspectives
are
discussed,
where
further
exploration
into
will
facilitate
development
Small Structures,
Journal Year:
2022,
Volume and Issue:
4(6)
Published: Nov. 27, 2022
Electrolysis
is
one
of
the
clean,
environmentally
friendly,
and
sustainable
pathways
to
produce
hydrogen
for
renewable
energy
storage.
However,
make
electrolysis
a
competitive
technology
production,
developing
nonprecious
metal‐based
catalysts
oxygen
evolution
reaction
(OER)
mandatory.
Several
new
classes
electrocatalysts
are
developed
with
outstanding
OER
catalytic
activity,
stability,
commercial
viability.
Owing
structural
diversity,
porosity,
accessibility
catalytically
active
metal
centers,
nickel‐based
metal–organic
frameworks
(MOFs)
intensively
explored
as
catalysts.
In
particular,
bi‐
trimetallic
Ni
MOFs
Fe
Co
additional
nodes
show
excellent
activity
which
can
be
tailored
through
fine
tuning
compositions.
Herein,
current
state
research
in
Ni‐based
catalyst
materials
alkaline
presented.
Strategies
improve
performance
like
compositional
variations,
choice
synthetic
routes,
support
Furthermore,
activities
compared
presented
based
on
metrics
(current
density,
overpotential,
Tafel
slopes).
Finally,
concluding
remarks
featuring
key
findings
possible
rooms
future
developments
summarized.
Small,
Journal Year:
2022,
Volume and Issue:
18(26)
Published: May 31, 2022
The
oxygen
evolution
reaction
(OER)
is
crucial
to
electrochemical
hydrogen
production.
However,
designing
and
fabricating
efficient
electrocatalysts
still
remains
challenging.
By
confinedly
coordinating
organic
ligands
with
metal
species
in
layered
double
hydroxides
(LDHs),
an
innovative
LDHs-assisted
approach
developed
facilely
synthesize
freestanding
bimetallic
2D
metal-organic
framework
nanosheets
(2D
MOF
NSs),
preserving
the
metallic
components
activities
OER.
Furthermore,
research
has
demonstrated
that
incorporation
of
carboxyl
coordinated
atoms
as
proton
transfer
mediators
endow
NSs
during
OHads
→
Oads
transition.
These
NiFe-2D
require
a
small
overpotential
260
mV
for
current
density
10
mA
cm-2
.
When
this
strategy
applied
LDH
grown
on
nickel
foam,
can
be
reduced
221
mV.
This
outstanding
OER
activity
supports
capability
multimetallic
frameworks
rational
design
water
oxidation
electrocatalysts.
provides
universal
path
synthesis
used
directly.
