Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 30, 2025
The
development
of
non-noble
metal-based
hydrogen
evolving
reaction
(HER)
electrocatalysts
operating
under
high
current
density
plays
a
critical
role
in
the
large-scale
application
anion
exchange
membrane
water
electrolysis
(AEM-WE).
Herein,
porous
and
hybrid
MoS2/Ni3S2
is
synthesized
on
nickel
foam
(NF)
via
one-step
hydrothermal
method
studied
its
reconstruction
process
during
alkaline
HER
conditions.
Experimental
results
indicated
that
MoS2
underwent
an
oxidative
dissolution
followed
by
dynamic
equilibrium
between
redeposition
amorphous
MoOx
HER.
Meanwhile,
S-vacancy-rich
Ni3S2
(A-Ni3S2)
exposed
acts
as
real
active
site
for
obtained
MoOx/A-Ni3S2
catalyst
exhibited
catalytic
performance
three-electrode
systems
single-cell
AEM-WE.
Finally,
long-term
durability
test
AEM
electrolyzer,
dry
cathode
applied
to
suppress
Mo
species
leaching
from
electrode.
Remarkably,
device
assembled
NiFe
anode
demonstrated
stability
2500
h
at
2
A
cm-2
40
°C
with
small
aging
rate
30
µV
h-1.
Energies,
Journal Year:
2023,
Volume and Issue:
16(2), P. 881 - 881
Published: Jan. 12, 2023
Heteroatom
doping
is
an
effective
strategy
to
regulate
electrocatalysts
for
the
oxygen
evolution
reaction
(OER).
Nonmetal
heteroatoms
can
effectively
engineer
geometric
and
electronic
structures
activating
surface
sites
of
catalysts
due
their
unique
radius
electronegativity
nonmetal
atoms.
Hence,
structure
activity
atoms
(X,
X
=
B,
C,
N,
O,
P)-doped
Ni3S2
(X-Ni3S2)
were
studied
screen
high-performance
Ni3S2-based
OER
through
density
functional
theory
calculation.
Theoretical
results
demonstrated
that
dopants
in
X-Ni3S2
alter
bond
length
charge
surface,
modify
active
intermediates
adsorption,
adjust
theoretical
overpotential.
Among
all
dopants,
C
modulate
structure,
activate
sites,
weaken
adsorption
key
intermediates,
decrease
overpotential,
enable
C-Ni3S2
with
best
among
lowest
overpotential
(0.46
eV).
Further
experimental
verified
synthesized
performed
improved
alkaline
condition
a
considerably
enhanced
261
mV
at
10
mA
cm−2
as
well
Tafel
slope
95
dec−1
compared
pristine
Ni3S2.
ACS Applied Energy Materials,
Journal Year:
2023,
Volume and Issue:
6(13), P. 7221 - 7229
Published: June 16, 2023
Coupling
the
electrochemical
oxidative
upgrading
of
formaldehyde
(FOR)
with
hydrogen
evolution
reaction
(HER)
toward
energy-efficient
H2
production
and
simultaneous
chemical
is
important,
but
it
still
faces
huge
challenges.
Herein,
a
unique
hierarchical
heterojunction
designed
by
coupling
Ni(OH)2
nanosheet
S-modified
Ni
species
on
nickel
foam
substrate
(S–Ni@Ni(OH)2/NF)
via
two-step
strategy.
The
nanosheets
large
surface
area
contribute
to
offering
sufficient
sites
for
grafting
S–Ni
species,
constructing
coupled
heterostructure
realize
greatly
improved
kinetics
both
HER
FOR
processes.
As
result,
S–Ni@Ni(OH)2/NF
delivers
an
overpotential
50
mV
at
10
mA
cm–2
low
potential
1.36
V
acquire
current
density
FOR.
For
HER||FOR-coupled
system,
built-in
electrolyzer
only
needs
1.58
as
well
superior
stability.
This
work
presents
facile
strategy
exploit
bifunctional
electrodes
generation
energy-saving
way
reforming.
Chemical Communications,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
This
review
reports
a
summary
of
the
recent
progress
in
WO
x
-based
catalyst
for
electrocatalytic
reactions,
emphasizing
their
crucial
roles
as
active
species,
electron-transfer
and
hydrogen
spillover
carriers,
microenvironment
regulators.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(6), P. 4602 - 4609
Published: March 15, 2023
The
high
overpotential
of
the
oxygen
evolution
reaction
(OER)
is
main
obstacle
to
water
electrolysis
for
green
hydrogen
production.
NiFe-based
materials
are
potential
non-precious
metal
electrocatalysts
OER,
but
their
poor
stability
and
limited
activity
have
been
concern.
Herein,
a
three-dimensional
self-supporting
NiFe
electrode
prepared
by
direct
writing
3D
printing
using
spherical
powders
Ni
Fe
metals
followed
hydrothermal
treatment
at
130
°C
in
urea
NH4F
mixed
solution.
fabricated
micro–nano-structured
presents
an
excellent
OER
220
mV
reach
100
mA
cm–2
with
Tafel
slope
49.1
dec–1
up
h
continuous
or
intermittent
power
supply.
produces
situ
growth
flower-like
clusters
NiFe2O4
nanoneedles
wrapped
FeOOH
nanosheets
on
surface
bimetal
microsphere
network,
outstanding
attributed
wide
variety
interfaces
heterojunctions
among
microspheres,
oxides,
hydroxides.
This
study
provides
approach
preparing
high-performance
electrodes
electrochemical
processes.
