ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(22), С. 10474 - 10486
Опубликована: Ноя. 6, 2024
Regulating
the
interfacial
coupling
of
core–shell
structured
electrocatalysts
is
critical
for
enhancing
electrocatalytic
performance
toward
oxygen
evolution
reaction
(OER).
In
this
work,
1D
NiCo-LDH
(layered
double
hydroxide)
and
NiCo
oxides
were
selected
as
a
model
to
study
effect
interlamellar
bonding
strength
on
structure
as-synthesized
NiCoS@NiCo(CH3COO)x
(NCS@COAC).
It
was
revealed
that
sulfides
obtained
from
oxide
exhibit
different
crystallinities,
which
in
turn
diversifies
morphology
NCS@COAC
P-NCS@COAC.
particular,
low
crystallinity
NCS
results
Kendall
between
CH3COO–
S2–,
leading
formation
hierarchical
composed
nanorod
nanotube
structures.
The
appearance
nanotubes
increases
ratio
accessible
active
sites,
facilitating
proceeding
OER.
addition,
interaction
S2–
regulates
local
chemical
environment
Co/Ni,
increasing
density
high-valent
Co,
especially
hydroxides.
Moreover,
also
inhibits
leaching
OER,
beneficial
maintaining
structure.
As
result,
delivers
decreased
overpotential
23
mV
lower
than
P-NCS@COAC
at
current
20
mA
cm–2
superior
stability
with
retention
original
after
testing
100
h.
Green Chemistry,
Год журнала:
2024,
Номер
26(9), С. 5326 - 5338
Опубликована: Янв. 1, 2024
To
obtain
high
catalytic
activity
and
stability
for
commercial
green
hydrogen
generation
without
requiring
extra
energy,
NiFeHCF@NF
was
synthesized
using
a
unique
all-in-one
approach.
ACS Applied Energy Materials,
Год журнала:
2025,
Номер
8(1), С. 503 - 517
Опубликована: Янв. 3, 2025
Herein,
we
report
a
simple
mechanochemical
dehydration
(MD)
method
to
synthesize
MD-NiMoO4,
which
is
treated
with
NaBH4
generate
oxygen
vacancy-enriched
MD-NiMoO4–SBH
understand
the
role
of
defects
on
water
splitting
performance.
Among
as-prepared
catalysts,
MD-NiMoO4–SBH,
MD-NiO,
and
MD-MoO,
exhibits
superior
activity
by
demanding
small
overpotential
(OER/HER)
241/108
mV
Tafel
slope
97/85
dec–1
(MD-NiMoO4:
293/156
mV;
slope:
114/93
dec–1)
stable
for
∼100
h.
The
activation
energies
were
calculated
electrolysis
using
(32
kJ/mol)
MD-NiMoO4
(28
kJ/mol).
integrated
areas
5.41
×
10–5
AV
(MD-NiMoO4–SBH)
3.61
(MD-NiMoO4)
confirmed
MOOH*
formation,
number
active
sites
was
found
be
3.484
10–16
6.540
(MD-NiMoO4–SBH).
superaerophobicity
corroborated
rapid
gas
bubble
growth
as
well
fast
evolution
from
catalyst
surface.
bifunctional
electrolyzer
(1.48
V)
(1.59
released
vigorous
bubbles
in
alkaline
electrolyte
robust
durability,
could
employed
devices
practical
utility.
As
observed
electrochemical
results,
MO
theory
reveals
that
band
gap
state-assisted
antibonding
state
having
low
electron
occupancy
favor
OER
HER
kinetics.
High-entropy
semiconducting
nanocrystals
involving
the
random
incorporation
of
five
or
more
metals
within
a
single,
disordered
lattice
are
receiving
significant
research
interest
as
catalytic
materials.
Among
these,
high-entropy
sulfide
(HES)
demonstrate
potential
electrocatalysts
but
have
been
slower
to
gain
compared
other
systems
due
complications
introduced
by
multistep,
high-temperature
synthesis
techniques
and
issues
material
stability
during
performance.
In
this
work,
we
report
simple,
reproducible,
scalable
HES
produce
star-like
nanocrystals.
The
show
promise
with
high
maintaining
uniform
overpotential
1.5%
initial
value
for
over
2,200
cycles
while
rotating,
values
low
313
mV
at
10
mA/cm2
oxygen
evolution
reaction
(OER)
in
alkaline
media.
Our
work
provides
low-temperature,
colloidal
method
formation
highly
complex,
phase-pure
thiospinel
Sustainable Energy & Fuels,
Год журнала:
2024,
Номер
8(14), С. 3124 - 3135
Опубликована: Янв. 1, 2024
The
encapsulated
morphology
of
ID-CoMo/NF
is
driven
by
the
ID
method.
It
exhibits
a
higher
catalytic
activity,
conductivity
and
lower
resistance
which
enhance
bifunctional
activity
(1.55
V)
in
overall
solar
cell
water
splitting.
Sustainable Energy & Fuels,
Год журнала:
2024,
Номер
8(15), С. 3452 - 3464
Опубликована: Янв. 1, 2024
A
synergistic
construction
of
an
iron
nitride
embedded
graphitic
carbon
heterostructured
electrocatalyst
via
the
solid-state
pyrolysis
method
explores
potential
bifunctional
activity
towards
overall
water
splitting.
Abstract
Production
of
hydrogen
(H
2
)
fuel
using
the
evolution
reaction
(HER)
through
electrocatalysis
water
splitting
is
inexpensive,
has
optimal
performance,
and
offers
remarkable
stability.
Developing
electrocatalysts
with
excellent
stability
high
efficiency
been
a
significant
challenging
factor
for
practical
applications
HER
decades.
Hydrogen
generation
occurs
on
electrode
due
to
emission
bubbles,
proton
diffusion,
transfer
electrons.
These
considerations
should
be
taken
into
account
during
construction
development
electrode.
This
review
synopsis
recent
advancements
in
various
electrodes
used
as
base
electrocatalysts,
such
nickel
foam,
titanium
foil,
copper
carbon
others,
discusses
their
catalytic
activity,
focus
diffusion
ions,
structure
electrode,
formulation
preparation
process.
In
conclusion,
we
provide
an
overview
ideas
further
improve
address
issues
manufacture
electrodes.
