Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 3, 2024
Abstract
Regulating
the
adsorption
of
an
intermediate
on
electrocatalyst
by
manipulating
electron
spin
state
transition
metal
is
great
significance
for
promoting
activation
inert
nitrogen
molecules
(N
2
)
during
electrocatalytic
reduction
reaction
(eNRR).
However,
achieving
this
remains
challenging.
Herein,
a
novel
2D/2D
Mott–Schottky
heterojunction,
Co
9
S
8
/Nb
CT
x
‐P,
developed
as
eNRR
catalyst.
This
achieved
through
in
situ
growth
cobalt
sulfide
(Co
nanosheets
over
Nb
MXene
using
solution
plasma
modification
method.
Transformation
from
low
(t
2g
6
e
g
1
to
high
5
adjusting
interface
electronic
structure
and
sulfur
vacancy
‐P.
The
ability
N
optimized
Co(II)
with
more
unpaired
electrons,
significantly
accelerating
*N
→*NNH
kinetic
process.
‐P
exhibits
NH
3
yield
62.62
µg
h
−1
mg
cat.
Faradaic
efficiency
(FE)
30.33%
at
−0.40
V
versus
reversible
hydrogen
electrode
(RHE)
0.1
m
HCl.
Additionally,
it
achieves
41.47
FE
23.19%
−0.60
RHE
Na
SO
4
.
work
demonstrates
promising
strategy
constructing
heterojunction
electrocatalysts
efficient
eNRR.
Battery energy,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 22, 2025
ABSTRACT
In
the
generation
of
green
hydrogen
and
oxygen
from
water,
transition
metal–based
electrode
materials
have
been
considered
high‐performance
water‐splitting
catalysts.
water
splitting,
evolution
reaction
(OER)
is
rate‐determining
step.
To
overcome
high
overpotential
slow
kinetics
OER,
development
effective
catalysts
to
improve
electrolysis
efficiency
essential.
Nickel–iron‐layered
double
hydroxides
(NiFe‐LDHs)
recognized
for
their
superior
electrochemical
performance
under
alkaline
OER
conditions
emerged
as
promising
owing
unique
structure
that
enhances
electrolyte
infiltration
exposes
more
active
sites.
However,
modulation
crystalline
NiFe‐LDHs
can
further
performance.
Accordingly,
this
study
introduces
an
innovative
synthesis
approach
based
on
Zn
doping
selective
etching
increase
ECSA
induce
favorable
transition‐metal
oxidation
states
in
NiFe‐LDHs,
thereby
improving
efficiency.
After
6
h
(Ni
2.9
0.1
Fe‐6h),
optimized
Ni
Fe
LDH
sample
demonstrated
remarkable
stability,
requiring
small
overpotentials
192
260
mV
at
current
densities
10
100
mA
cm
−2
,
respectively.
Moreover,
Fe‐6h
could
maintain
its
original
(260
mV)
a
density
250
h.
The
proposed
subsequent
partial
practically
be
applied
numerous
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 3, 2024
Abstract
Regulating
the
adsorption
of
an
intermediate
on
electrocatalyst
by
manipulating
electron
spin
state
transition
metal
is
great
significance
for
promoting
activation
inert
nitrogen
molecules
(N
2
)
during
electrocatalytic
reduction
reaction
(eNRR).
However,
achieving
this
remains
challenging.
Herein,
a
novel
2D/2D
Mott–Schottky
heterojunction,
Co
9
S
8
/Nb
CT
x
‐P,
developed
as
eNRR
catalyst.
This
achieved
through
in
situ
growth
cobalt
sulfide
(Co
nanosheets
over
Nb
MXene
using
solution
plasma
modification
method.
Transformation
from
low
(t
2g
6
e
g
1
to
high
5
adjusting
interface
electronic
structure
and
sulfur
vacancy
‐P.
The
ability
N
optimized
Co(II)
with
more
unpaired
electrons,
significantly
accelerating
*N
→*NNH
kinetic
process.
‐P
exhibits
NH
3
yield
62.62
µg
h
−1
mg
cat.
Faradaic
efficiency
(FE)
30.33%
at
−0.40
V
versus
reversible
hydrogen
electrode
(RHE)
0.1
m
HCl.
Additionally,
it
achieves
41.47
FE
23.19%
−0.60
RHE
Na
SO
4
.
work
demonstrates
promising
strategy
constructing
heterojunction
electrocatalysts
efficient
eNRR.
