Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(18), P. 17939 - 17947
Published: Aug. 29, 2024
Electrocatalytic
water
splitting
is
an
intriguing
technique
for
clean
energy
production,
and
engineering
heterojunctions
with
internal
electric
field
(IEF)
can
significantly
enhance
the
electrocatalytic
performance.
In
this
paper,
Co3O4/Bi2MoO6
heterojunction
nanotubes
have
been
prepared
via
electrospinning
calcination
show
stronger
activity
stability
than
single-phase
Co3O4
Bi2MoO6
due
to
so-called
"1
+
1
>
2"
synergistic
effect
induced
by
IEF.
particular,
1.00Co3O4/Bi2MoO6
nanotube
catalyst
performed
overpotential
toward
hydrogen
evolution
reaction
(HER)
197
mV
oxygen
(OER)
332
at
10
mA·cm–2.
Based
on
enhancement
of
IEF
verified
density
functional
theory
calculation,
extended
photocatalytic
degradation
tetracycline
(TC)
showed
efficiency
68.5%
within
200
min
under
visible
light
irradiation.
This
work
provides
a
facile
"one
stone,
three
birds'
strategy
construct
develops
mechanism
from
application.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 16, 2025
Constructing
a
built-in
electric
field
(BIEF)
within
heterostructures
has
emerged
as
compelling
strategy
for
advancing
electrocatalytic
oxygen
evolution
reaction
(OER)
performance.
Herein,
the
p-n
type
nanosheet
array
heterojunction
Ni2P-NCDs-Co(OH)2-NF
are
successfully
prepared.
The
variation
in
interaction
affinity
between
nitrogen
N-doped
carbon
dots
(NCDs)
and
Ni/Co
induces
charge
redistribution
Co
Ni
Ni2P-NCDs-Co(OH)2-NF-3
heterostructure,
thereby
enhancing
intensity
of
BIEF,
facilitating
electron
transfer,
markedly
improving
OER
activity.
optimized
electrocatalyst,
Ni2P-NCDs-Co(OH)2-NF-3,
demonstrates
remarkably
low
overpotential
389
mV
at
500
mA
cm-2,
alongsides
small
Tafel
slope
65
dec-1,
expansive
electrochemical
active
surface
area
(ECSA),
impedance,
outstanding
stability
exceeding
425
h
Faradaic
efficiency
up
to
96%.
In
situ
Raman
spectroscopy
density
functional
theoretical
(DFT)
calculations
elucidate
mechanism,
revealing
that
enhanced
BIEF
optimizes
adsorption
energy
Co3+
OH-
weakened
desorption
during
reaction.
work
ponieeringly
employed
NCDs
regulator
effectively
tuning
achieving
superior
performance
under
large
current
density,
thus
charting
new
pathways
development
high-efficiency
electrocatalysts.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 11, 2025
Transition-metal
dichalcogenides
(TMDs),
such
as
molybdenum
disulfide
(MoS2),
have
emerged
a
generation
of
nonprecious
catalysts
for
the
hydrogen
evolution
reaction
(HER),
largely
due
to
their
theoretical
adsorption
energy
close
that
platinum.
However,
efforts
activate
basal
planes
TMDs
primarily
centered
around
strategies
introducing
numerous
atomic
vacancies,
creating
vacancy–heteroatom
complexes,
or
applying
significant
strain,
especially
acidic
media.
These
approaches,
while
potentially
effective,
present
substantial
challenges
in
practical
large-scale
deployment.
Here,
we
report
gap-state
engineering
strategy
controlled
activation
S
atom
MoS2
through
metal
single-atom
doping,
effectively
tackling
both
efficiency
and
stability
alkaline
water
seawater
splitting.
A
versatile
synthetic
methodology
allows
fabrication
series
single-metal
atom-doped
materials
(M1/MoS2),
featuring
widely
tunable
densities
with
each
dopant
replacing
Mo
site.
Among
these
(Mn1,
Fe1,
Co1,
Ni1),
Co1/MoS2
demonstrates
outstanding
HER
performance
media,
overpotentials
at
mere
159
164
mV
100
mA
cm–2,
Tafel
slopes
41
45
dec–1,
respectively,
which
surpasses
all
reported
TMD-based
benchmark
Pt/C
during
splitting,
can
be
attributed
an
optimal
modulation
associated
sulfur
atoms.
Experimental
data
correlating
doping
density
identity
performance,
conjunction
calculations,
also
reveal
descriptor
linked
near-Fermi
gap
state
modulation,
corroborated
by
observed
increase
unoccupied
3p
states.
Chemical Society Reviews,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
review
examines
the
strategies
of
symmetry
breaking
(charge/coordination/geometric)
in
single-atom
catalysts
to
regulate
active
site
electronic
structures,
greatly
enhancing
catalytic
performance.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(28), P. 17544 - 17556
Published: Jan. 1, 2024
A
bimetallic
telluride
heterojunction
is
electronically
modulated
by
vanadium
doping,
resulting
in
remarkable
catalytic
activity
for
hydrogen
evolution,
oxygen
and
overall
water-splitting.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 8, 2024
Abstract
Constructing
built‐in
electric
field
(BIEF)
in
heterojunction
catalyst
is
an
effective
way
to
optimize
adsorption/desorption
of
reaction
intermediates,
while
its
precise
tailor
achieve
efficient
bifunctional
electrocatalysis
remains
great
challenge.
Herein,
the
hollow
Mo/MoS
Vn
nanoreactors
with
tunable
BIEFs
are
elaborately
prepared
simultaneously
promote
hydrogen
evolution
(HER)
and
urea
oxidation
(UOR)
for
sustainable
production.
The
BIEF
induced
by
sulfur
vacancies
can
be
modulated
from
0.79
0.57
0.42
mV
nm
−1
,
exhibits
a
parabola‐shaped
relationship
HER
UOR
activities,
V1
nanoreactor
moderate
presents
best
activity.
Theoretical
calculations
reveal
that
evidently
facilitate
breakage
N─H
bond
UOR.
electrolyzer
assembled
delivers
cell
voltage
1.49
V
at
100
mA
cm
−2
which
437
lower
than
traditional
water
electrolysis,
also
excellent
durability
200
h.
Life
cycle
assessment
indicates
HER||UOR
system
possesses
notable
superiority
across
various
environment
impact
energy
consumption.
This
work
provide
theoretical
experimental
direction
on
rational
design
advanced
materials
energy‐saving
eco‐friendly
