Low-valence platinum single atoms in sulfur-containing covalent organic frameworks for photocatalytic hydrogen evolution
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Дек. 3, 2024
This
study
focuses
on
optimizing
catalytic
activity
in
photocatalytic
hydrogen
evolution
reaction
by
precisely
designing
and
modulating
the
electronic
structure
of
metal
single
atoms.
The
catalyst,
denoted
as
PtSA@S-TFPT,
integrates
low-valence
platinum
atoms
into
sulfur-containing
covalent
organic
frameworks.
robust
asymmetric
four-coordination
between
sulfur
within
framework
enables
a
high
loading
12.1
wt%,
resulting
efficient
production
11.4
mmol
g−1
h−1
stable
performance
under
visible
light.
These
outcomes
are
attributed
to
reduced
desorption
barrier
enhanced
photogenerated
charge
separation,
indicated
density
functional
theory
calculations
dynamic
carrier
analysis.
work
challenges
traditional
notions
opens
an
avenue
for
developing
atom-loaded
catalysts
advance
evolution.
A
sulfur-rich
with
Pt
atom
sites
is
reported
material
was
conditions
due
barriers
separation.
Язык: Английский
Construction of metal–N3 sites in covalent organic frameworks for enhancing CO2 photoreduction
Applied Catalysis B Environment and Energy,
Год журнала:
2025,
Номер
unknown, С. 125117 - 125117
Опубликована: Фев. 1, 2025
Язык: Английский
Impact of Imine Bond Orientations and Acceptor Groups on Photocatalytic Hydrogen Generation of Donor–Acceptor Covalent Organic Frameworks
Small,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 9, 2024
Abstract
Covalent
organic
frameworks
(COFs)
have
emerged
as
one
of
the
most
studied
photocatalysts
owing
to
their
adjustable
structure
and
bandgaps.
However,
there
is
limited
research
on
regulating
light‐harvesting
capabilities
acceptor
building
blocks
in
donor–acceptor
(D–A)
isomer
COFs
with
different
bond
orientations.
This
investigation
crucial
for
elucidating
structure‐property‐performance
relationship
COF
photocatalysts.
Herein,
a
series
D–A
isostructural
are
synthesized
imine
orientations
using
benzothiadiazole
its
derivatives‐based
units.
Extended
light
absorption
achieved
groups
that
strong
electron‐withdrawing
capacities,
although
this
resulted
decreased
hydrogen
generation
efficiency.
Photocatalytic
experiments
indicated
dialdehyde
benzothiadiazole‐based
COFs,
HIAM‐0015,
exhibit
highest
rate
(17.99
mmol
g
−1
h
),
which
15
times
higher
than
isomer.
The
excellent
photocatalytic
performance
HIAM‐0015
can
be
attributed
fast
charge
separation
migration.
work
provides
insights
into
rational
design
synthesis
achieve
efficient
activity.
Язык: Английский
Vinylene-linked covalent organic frameworks based on phenanthroline for visible-light-driven bifunctional photocatalytic water splitting
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 160448 - 160448
Опубликована: Фев. 1, 2025
Язык: Английский
Recent advances of covalent organic frameworks-based photocatalysts: Principles, designs, and applications
CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION),
Год журнала:
2025,
Номер
70, С. 142 - 206
Опубликована: Март 1, 2025
Язык: Английский
Photocatalytic Applications of Covalent Organic Frameworks: Synthesis, Characterization, and Utility
Nanoscale,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
This
review
highlights
the
recent
advances
in
utilizing
covalent
organic
frameworks
(COFs)
for
photocatalytic
applications.
Язык: Английский
Interfacial charge transfer on hierarchical synergistic shell wall of MXene/MoS2 on CdS nanospheres: heterostructure integrity for visible light responsive photocatalytic H2 evolution
Nano Convergence,
Год журнала:
2024,
Номер
11(1)
Опубликована: Дек. 2, 2024
Abstract
Energy
scarcity
and
environmental
pollution
have
prompted
research
in
hydrogen
generation
from
solar
to
develop
clean
energy
through
highly
efficient,
effective,
long-lasting
photocatalytic
systems.
Designing
a
catalyst
with
robust
stability
an
effective
carrier
separation
rate
was
achieved
heterostructure
assembly,
but
certain
functionalities
must
be
explored.
In
this
paper
we
designed
ternary
assembly
of
CdS
nanospheres
wrapped
hierarchical
shell
walls
layered
MXene-tagged
MoS
2
nanoflakes,
forming
intimate
interfaces
in-situ
growth
process.
An
in-layered
wall
MXene
surface-wrapped
nanoflakes
as
core–shell
improved
the
photo-corrosion
resistance
accelerated
production
H
(38.5
mmol
g
−1
h
),
which
is
10.7,
3.1,
1.9
times
faster
than
that
CdS,
CdS–MXe,
CdS–MoS
nanostructures,
respectively.
The
apparent
quantum
efficiency
CdS–MXe
2.4
/MoS
calculated
34.6%
at
λ
=
420
nm.
X-ray
ultraviolet
photoelectron
spectroscopies
validated
electronic
states,
band
alignment,
work
function
heterostructures,
whilst
time-resolved
photoluminescence
measured
lifespan
evaluate
charge
migration
CdS-MXe/MoS
heterostructure.
dual
surface
wrapping
MXe/MoS
over
confirmed
structural
durability
remained
intact
throughout
reaction,
promoting
approximately
93.1%
its
catalytic
property
even
after
five
repeatable
cycles.
This
study
examined
how
template
improves
opens
new
way
design
MXene-based
durable
catalysts
for
solar-energy
conversion.
Graphical
Язык: Английский