Fabrication of TiO2/MOF Type II Heterojunction by Growth of TiO2 on Cr-Based MOF for Enhanced Photocatalytic Hydrogen Production
Xiaoxiao Li,
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Xinya Feng,
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Delong Meng
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et al.
Crystal Growth & Design,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
MOF-based
heterojunctions
can
significantly
enhance
the
efficiency
of
photocatalytic
hydrogen
production;
however,
construction
efficient
remains
a
formidable
challenge.
In
this
study,
we
successfully
developed
series
Type
II
by
growing
TiO2
on
Cr-based
MOF,
thereby
regulating
generation,
separation,
and
transportation
photogenerated
charge
carriers
to
improve
evolution
performance.
Among
these,
23%TiO2/MIL-101(Cr)
photocatalyst
exhibited
highest
production
activity,
achieving
884.01
μmol
g–1
in
just
5
h,
which
is
6.8
6.0
times
that
pure
MIL-101(Cr)
TiO2,
respectively.
Additionally,
demonstrated
excellent
cyclic
stability.
Tiny
particles
were
proven
mainly
deposited
surface
N2
sorption
isotherm
analyses,
transmission
electron
microscopy
(TEM),
high-resolution
TEM,
high-angle
annular
dark
field
scanning
microscopy,
etc.
Characterization
techniques
such
as
situ
XPS
confirmed
formation
TiO2/MIL-101(Cr)
heterostructure.
Band
structure
analysis
indicates
meets
thermodynamic
requirements
for
production.
Furthermore,
transient
photocurrent
measurements,
electrochemical
impedance
analysis,
photoluminescence
reveal
possesses
superior
capabilities
carrier
transport,
resulting
from
kinetic
perspective.
This
research
offers
valuable
insights
into
preparation
development
photocatalysts
Language: Английский
Superhydrophilic Bimetallic Sulfide Nanosheets for Hydrogen Production Using Urea-Assisted Electrocatalytic Water Splitting
Yuqian Bao,
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Ying Yang,
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Jiayao Jiang
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et al.
ACS Applied Nano Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 26, 2025
Electrolysis
of
industrial
and
human
urea-containing
wastewater
is
beneficial
to
the
environment,
using
urea
oxidation
reaction
(UOR)
instead
oxygen
evolution
(OER)
saves
energy
effectively
improves
performance
electrocatalytic
hydrolysis
for
hydrogen
production.
The
Co9S8/Ni3S2
nanosheet
structures
on
nickel
foam
(NF)
are
an
active
hydrophilic
catalyst
UOR
(HER).
This
electrocatalyst
needs
a
low
overpotential
136
mV
attain
10
mA·cm–2
HER,
it
can
reach
current
density
100
at
working
potential
1.36
V
vs
RHE.
introduction
Co
element
regulates
both
morphology
electronic
structure.
former
results
in
Co9S8/Ni3S2/NF
offering
more
sites
with
larger
specific
surface
area
morphology,
while
latter
drives
S
move
direction
binding
energy.
examination
cobalt
sulfides
as
bifunctional
energy-efficient
electrolytic
H2
production
purification
urea-rich
harmless
has
significantly
advanced
due
this
work.
Language: Английский
Synergistic Cu2O@Ni(OH)2 Core–Shell Electrocatalyst for High-Efficiency Nitrate Reduction to Ammonia
Zunjie Zhang,
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Bingcheng Ge,
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Mengran Liu
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et al.
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 23, 2025
The
electrocatalytic
reduction
reaction
of
nitrate
(NO3RR)
is
anticipated
to
convert
nitrogen-containing
pollutants
into
valuable
ammonia
products.
Copper-based
catalysts
have
received
great
attention
because
their
good
performance
in
the
NO3RR
due
strong
binding
energy
with
*NO3
intermediates.
However,
poor
H2O
dissociation
ability
Cu
unable
provide
H•
time
for
hydrogenation
NOx,
thus
hindering
electroreduction
NO3-.
Herein,
we
designed
a
shell-core
nanocube
electrocatalyst
Cu2O@Ni(OH)2-x
(x
represents
molar
ratio
Ni/Cu)
using
liquid
phase
combined
etching
and
precipitation
method
NO3RR.
Due
synergistic
effect
between
activation
excellent
Ni(OH)2,
Cu2O@Ni(OH)2-3.3%
shows
an
impressive
yield
rate
(557.9
μmol
h-1
cm-2)
Faradaic
efficiency
(97.4%)
at
-0.35
V
vs.
RHE.
Operando
Raman
Auger
electron
spectroscopy
observe
Cu2O
during
process.
Density
functional
theory
calculations
paramagnetic
resonance
analysis
reveals
that
Ni(OH)2
can
lower
barrier
dissociation,
thereby
promoting
generation
accelerating
*NO
This
research
provides
efficient
Cu-based
catalyst
reducing
NO3-
may
motivate
development
effective
electrocatalysts
further
experimentation.
Language: Английский
Leafy ZIF‐Derived Bi‐Metallic Phosphate‐Mxene Nanocomposites for Overall Water Splitting
Rupali S. Mane,
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Dilkhush Zaroliwalla,
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Ganga Periyasamy
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et al.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 28, 2025
Abstract
Electrocatalytic
water
splitting
is
a
significant
method
of
hydrogen
production
to
overcome
energy
scarcity
and
tackle
the
environmental
pollution
caused
by
extreme
consumption
fossil
fuels.
This
work
directs
focus
on
development
an
efficient
catalyst
toward
oxygen
evolution
reactions
(HER
OER).
Herein,
highly
active
robust
bi‐metallic
phosphate
nanocomposite
supported
Mxene
derived
from
in
situ
technique,
using
2D
(leafy)
zeolitic
imidazolate
framework
(ZIF
67)
phosphorus‐doped
nickel
hydroxide
[P‐Ni(OH)
2
]
as
primary
precursor
for
first
time.
The
synergy
between
reaction
mechanism
leads
formation
porous,
needle‐like
morphology
with
layer
boundary
interface.
A
remarkable
performance
obtained
significantly
low
overpotential
excellent
stability
HER
OER.
In
conjunction
structural
merits
catalytic
activity,
attributed
optimized
porosity
owing
2D/3D
conducting
interface
channel.
theoretical
experimental
insights
study
affirm
conducive
nature
overall
splitting.
finding
exposed
new
avenue
chemistry
MOF
substrate
develop
electrocatalyst
Language: Английский
Ir NCs Embedded Co-MOF Nanosheets for Boosting Electrochemical Nitrate Reduction to Ammonia Performance
Yunqing Zhu,
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Gaigai Dong,
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Fan Pan
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et al.
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
17(19), P. 28084 - 28093
Published: May 2, 2025
In
this
study,
Ir
nanoclusters
adorned
with
abundant
p-mercaptobenzoic
acid
(p-MBA)
ligands
were
employed
to
fabricate
an
electrocatalytic
material
consisting
of
embedded
within
two-dimensional
Co-MOF
nanosheets
(Ir
NCs@Co-MOF)
for
the
NO3-
reduction
reaction
(NO3-RR).
TEM
analysis
confirmed
that
are
uniformly
distributed
in
2D
nanosheets,
average
diameter
about
1.8
nm.
At
a
potential
-0.8
V
vs
RHE,
NCs@Co-MOF
catalyst
achieved
nitrate
conversion
rate,
ammonia
selectivity,
and
yield
92.5,
81.4%,
230.1
μg·h-1·cm-2,
respectively,
over
duration
120
min.
The
strong
interaction
between
serves
enhance
activity
accelerate
rate
reduction.
Stability
tests
indicated
after
20
cycles,
both
selectivity
demonstrated
relative
stability,
thereby
indicating
robust
performance
catalytic
system.
results
EPR
TBA
quenching
experiments
indicate
*H
plays
key
role
NO3-RR
process.
situ
DEMS
investigations
revealed
during
process,
pathway
was
as
follows:
*NO3
→
*NO2
*NO
*NOH
*NH2OH
*NH2
*NH3
NH3.
Language: Английский
Boosting Reaction Kinetics and Stability of Electrocatalytic Oxygen Evolution with Ir/CoV‐LDH/Graphene Heterogeneous Electrocatalyst
Xianjun Zhu,
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Le Fang,
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Zichao Zhou
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et al.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 8, 2025
Abstract
To
address
the
challenge
of
low
catalytic
performance
in
electrocatalytic
oxygen
evolution
reaction
(OER)
caused
by
slow
kinetics,
a
novel
approach
is
developed
utilizing
crystalline
properties
iridium
(Ir)
and
hydrogen‐related
layered
double
hydroxide
(LDH)
to
enhance
corrosion
resistance.
These
materials
are
integrated
into
CoV‐LDH
structure
design
an
Ir/CoV‐LDH/G
heterogeneous
electrocatalyst.
This
innovative
not
only
enhances
kinetics
but
also
optimizes
electronic
catalyst
through
interactions
at
interface,
leading
excellent
OER
performance.
Notably,
requires
overpotentials
merely
203
289
mV
achieve
current
densities
10
100
mA
cm
−2
,
respectively.
Furthermore,
when
utilized
Ir/CoV‐LDH/G||Pt/C
electrolytic
cell
for
overall
water
splitting,
it
delivers
density
mA·cm
voltage
1.46
V,
surpassing
most
commercial
IrO₂||Pt/C
previously
reported
Ir‐based
LDH
electrocatalysts.
The
exhibits
remarkable
stability,
maintaining
h
without
significant
degradation.
Language: Английский
Bringing Porous Framework Materials toward Photocatalytic H2O2 Production
Chenhao Bao,
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Lan Li,
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Xiaofei Wang
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et al.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
Photocatalytic
H2O2
production
driven
by
renewable
solar
energy
is
a
promising
and
sustainable
approach,
with
porous
framework
materials
such
as
metal-organic
frameworks
(MOFs),
covalent
organic
(COFs),
hydrogen-bonded
(HOFs)
emerging
highly
efficient
catalysts.
This
Review
first
presents
the
current
research
state
of
in
photosynthesis,
focusing
on
progress
across
different
mechanism
insights
gained
through
advanced
techniques.
Furthermore,
systematic
categorization
material
modifications
aimed
at
enhancing
photocatalytic
efficiency
provided,
linking
structural
to
improved
performance.
Key
factors
charge
carrier
separation
transfer,
reaction
pathways,
stability
are
comprehensively
analyzed.
Finally,
challenges
related
stability,
scalability,
cost-effectiveness,
discussed
alongside
opportunities
for
future
advancements.
aims
provide
into
understanding
optimizing
scalable
photosynthesis.
Language: Английский
Synergistic Effect of N-Doped Carbon and Mn in NiFe LDH To Achieve 1 A cm–2 Current Density for the Oxygen Evolution Reaction
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 5, 2025
The
development
of
highly
efficient
oxygen
evolution
reaction
(OER)
electrocatalysts
is
pivotal
to
enhance
the
performance
alkaline
water
electrolyzers.
Herein,
a
facile
two-step
electrodeposition
method
developed
for
fabrication
nitrogen-doped
carbon
(NC)
and
manganese-incorporated
NiFe
layered
double
hydroxides
(LDHs)
supported
on
Ni
foam
(NF).
When
evaluated
in
1.0
M
KOH
solution,
optimized
material
NC20-Mn-NiFe
LDH
showed
excellent
OER
requiring
low
overpotentials
298
331
mV
achieve
high
current
densities
500
1000
mA
cm-2,
respectively,
no
loss
density
was
observed
at
fixed
potentials
1.53
1.57
V
125
h
each
case.
This
not
only
better
than
that
state-of-the-art
RuO2/NF
but
also
most
recently
reported
LDH-based
catalysts.
Such
remarkable
mainly
attributed
vertical
growth
sheets
NF,
facilitated
electron
transfer
charge
modulation
active
metal
sites
due
electron-withdrawing
electron-donating
effects
NC
Mn,
resulting
shift
rate-determining
step
from
OOH*
formation
O2
desorption
with
decreased
free
energy.
research
work
provides
further
insights
into
modulating
structure
materials
delivering
industrial-level
overpotentials.
Language: Английский