Here,
integrated
functional
components
into
a
hybrid
heterostructure
via
highly
stabilized
network-like
interconnected
electronic
nanoarchitecture
of
1D
N-doped
holey-carbon
nanotube
(NHCNT)
with
2D
nickel─metal-organic
framework
(Ni─MOF)
nanosheets
are
developed
as
high-performance
electrocatalyst
for
overall
water
splitting.
The
NHCNT
promoting
electron
transport
pathways
in
electrocatalyst,
and
formation
holes
nanotubes
further
enables
excellent
diffusion
ions
the
reaction
rate.
An
combination
1D/2D
structure
NHCNT/Ni─MOF-4
exhibits
oxygen
evolution
(η
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(28)
Опубликована: Март 13, 2024
Abstract
It
is
a
great
challenge
to
induce
the
formation
of
RuP
4
phase
and
realize
construction
metal‐rich
phase/phosphorus‐rich
phase‐ruthenium
phosphide
heterostructure
by
directional
regulation
proportion
P
metal
atoms.
The
ultra‐high
conductivity
Ru
2
excellent
ability
V‐doped
absorb/desorb
H*
are
confirmed
density
functional
theory
(DFT)
calculations,
which
laid
theoretical
foundation
for
unique
P/V‐RuP
structure
accelerate
HER
reaction
kinetics.
This
work
innovatively
uses
V‐doping
strategy
with
high
intrinsic
activity,
finally
construct
V‐Ru
x
y
nanosheets
rich
Ru/Ru
heterostructures.
Thanks
optimization
V
dopants,
catalyst
only
needs
180
mV
obtain
an
industrial‐grade
current
1
A
cm
−2
.
In
summary,
this
provides
new
idea
design
performance
ruthenium‐based
catalysts.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(6), С. 6449 - 6459
Опубликована: Март 14, 2024
Electrochemical
water
splitting
prompted
by
organic
molecules
presents
a
competitive
prospect
for
implementing
energy-efficient
hydrogen
evolution
and
alleviating
organic-rich
pollution.
In
this
work,
we
fabricated
heterojunction
of
CoFe-layered
double
hydroxide
(CoFe
LDH)
needles
on
MoS2/Ni3S2/nickel
foam
(NF)
nanoarrays
LDH/MoS2/Ni3S2/NF)
forming
Schottky
interface
p–p
interface.
The
prepared
CoFe
LDH/MoS2/Ni3S2/NF
exhibits
superior
electrocatalytic
activities
with
low
potentials
to
drive
50
mA
cm–2
the
reaction
(HER,
0.098
V
vs
reversible
electrode
(RHE)),
oxygen
(OER,
1.507
RHE),
urea
oxidation
(UOR,
1.460
ethanol
(ETOR,
1.484
RHE).
Meanwhile,
can
maintain
robust
stability
in
these
reactions.
enhanced
result
from
increased
active
sites
acceleration
charge
transfer
caused
built-in
electric
fields.
Moreover,
catalyst
also
remarkable
catalytic
performance
two-electrode
systems
KOH,
KOH
assisted
urea,
polylactic
acid.
This
work
offers
rational
method
designing
efficient
electrocatalysts
via
combining
heterojunctions
effectively
generate
energy
treat
pollutants.
Developing
efficient
and
economical
electrocatalysts
for
hydrogen
generation
at
high
current
densities
is
crucial
advancing
energy
sustainability.
Herein,
a
self-supported
evolution
reaction
(HER)
electrocatalyst
rationally
designed
prepared
on
nickel
foam
through
simple
two-step
chemical
etching
method,
which
consists
of
Pt
quantum
dots
(PtQDs)
coupled
with
nickel-iron
layered
double
hydroxide
(NiFe
LDH)
nanosheets
(named
PtQDs@NiFe
LDH).
The
characterization
results
indicate
that
the
introduction
PtQDs
induces
more
oxygen
vacancies,
thereby
optimizing
electronic
structure
LDH.
This
modification
enhances
conductivity
accelerates
adsorption/desorption
kinetics
intermediates
in
LDH,
ultimately
resulting
exceptional
catalytic
performance
HER
large
densities.
Specifically,
LDH
delivers
500
2000
mA·cm-2
remarkably
low
overpotentials
92
252
mV,
respectively,
markedly
outperforming
commercial
Pt/C
(η500
=
190
η2000
436
mV).
Moreover,
when
employing
NiFe
precursor
catalyst
as
anode
cathode,
an
overall
water
electrolysis
system,
only
1.66
V
2.02
are
required
to
achieve
mA·cm-2,
while
maintaining
robust
stability
200
h.
study
introduces
feasible
approach
developing
industrial-scale
