Pyridyl‐Imine‐Functionalized Donor–Acceptor Covalent Organic Frameworks for Optimal Photosynthesis of Hydrogen Peroxide
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 3, 2025
Abstract
The
artificial
photosynthesis
of
hydrogen
peroxide
(H
2
O
)
using
semiconductor
photocatalysts
is
gaining
attention
as
an
eco‐friendly
and
energy‐efficient
method.
Covalent
organic
frameworks
(COFs)
show
great
promise
in
enhancing
photocatalytic
H
production
due
to
their
tunable
structures
functional
diversity.
However,
the
efficiency
generation
close
photoelectric
properties
COFs
microenvironment
active
sites.
Herein,
synthesis
pyridyl‐imine‐functionalized
(PyIm‐COFs)
featuring
donor–acceptor
(D–A)
moieties
improve
reported.
By
employing
benzothiadiazole
(BT)
units
with
varied
fluorine
substitutions,
electronic
environment
sites,
optimizing
selective
two‐electron
(2e
−
oxygen
reduction
reaction
(ORR),
tuned.
Among
synthesized
COFs,
PyIm‐BT_F
exhibits
highest
activity,
achieving
a
rate
5342
µmol
g
−1
h
.
importance
D–A
rational
design
COF‐based
photocatalysts,
providing
novel
strategy
for
sustainable
through
optimized
site
environments,
underscored.
Язык: Английский
Functional Groups‐Regulated Organic Semiconductors for Efficient Artificial Photosynthesis of Hydrogen Peroxide
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 18, 2025
Abstract
Hydrogen
peroxide
(H
2
O
)
is
an
environmentally
friendly
reagent,
and
organic
semiconductors
(OSCs)
are
ideal
photocatalysts
for
the
synthesis
of
H
due
to
their
well‐defined
molecular
structure,
strong
donor‐acceptor
interactions,
efficient
charge
separation.
This
review
discusses
regulatory
mechanisms
functional
group
modifications
in
tuning
photocatalytic
performance
OSCs,
highlighting
relationship
between
structure
catalytic
performance.
For
example,
electron‐regulating
groups,
such
as
cyano
halogen,
induce
dipoles,
facilitating
migration
photogenerated
electrons.
Fluorine
groups
optimize
band
prolong
carrier
lifetime
high
electronegativity.
π‐Conjugated
extension
like
anthraquinone
thiophene,
expand
conjugation,
improve
visible
light
capture,
stabilize
intermediates
through
redox
cycles.
Hydroxyl
enhance
surface
hydrophilicity
promote
activation,
while
imine
bond
protonation
adjusts
distribution
improves
selectivity
cycle
stability.
Multi‐active
site
sulfonic
acid
amide,
accelerate
reaction
kinetics
inhibit
decomposition.
Functional
absorption,
separation,
reactions
electronic
regulation,
intermediate
adsorption
optimization,
proton‐electron
transfer.
Future
work
should
integrate
machine
learning
identify
optimal
combinations
develop
green
functionalization
strategies
photocatalyst
synthesis.
Язык: Английский
Enhancing photocatalyst stability for hydrogen peroxide synthesis through promoting oxygen-centered organic radical formation
Science China Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 31, 2025
Язык: Английский
Covalent triazine frameworks: Fabrication for energy conversion
Coordination Chemistry Reviews,
Год журнала:
2025,
Номер
537, С. 216703 - 216703
Опубликована: Апрель 17, 2025
Язык: Английский
Breakthroughs in Photocatalytic Hydrogen Peroxide Production Through Advanced Mechanisms and Catalytic Systems
Advanced Sustainable Systems,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 22, 2025
Abstract
With
the
rapid
development
of
clean
energy,
photocatalytic
hydrogen
peroxide
(H₂O₂)
production
has
emerged
as
a
transformative
strategy
to
decarbonize
chemical
industry,
offering
sustainable
alternative
fossil
fuel‐dependent
anthraquinone
process.
Nevertheless,
in
pathway
H₂O₂
production,
there
are
still
series
negative
issues,
such
insufficient
supply
protons,
difficulty
separating
electron–hole
pair,
and
low
utilization
spatial
reactive
active
sites.
Therefore,
is
an
urgent
need
for
systematic
review
latest
advancements
further
enhance
production.
In
this
review,
three
systems
comprehensively
discussed,
oxygen
reduction
reaction
(ORR)
system
with
without
sacrificial
agents,
water
oxidation
(WOR)
accompanied
by
evolution
reaction,
dual
coupling
ORR
WOR.
By
bridging
molecular‐scale
mechanistic
insights
system‐level
innovation,
not
only
explains
fundamental
mechanisms
but
also
bridges
lab‐scale
breakthroughs
industrial
viability,
positioning
cornerstone
green
chemistry
renewable
energy
storage,
implications
environmental
remediation
carbon‐neutral
synthesis.
Язык: Английский
Chelated Linkage and Framework Isomerism Effect Toward Robust Zn‐Salen MCOFs for Dual‐Channel Overall H2O2 Photosynthesis
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 24, 2025
Abstract
It
remains
challenging
to
synthesize
effective
and
photocorrosion‐tolerated
organic
photocatalysts
for
two‐electron
oxygen
reduction
reaction
(2e⁻
ORR)
water
oxidation
WOR).
Herein,
two
isomeric
Zn‐Salen
metal
covalent
frameworks
(Zn‐Salen‐MCOFs)
with
kgd‐v
or
hcb
topology
are
designed
as
robust
efficient
dual‐channel
H
2
O
photosynthesis.
Zn‐Salen‐MCOF
shows
a
higher
photocatalytic
production
rate
of
6617/3438
µmol
gcat.
−1
h
in
pure
with/without
additional
air
saturation,
together
long‐time
continuous
photosynthesis
performance
(100
h).
The
framework
isomerism
effect
the
chelated
linkages
contribute
improved
efficiency
stability
it.
A
three‐step
2e⁻
WOR
initial
adsorption
over
ZnO
N
unit
four‐step
ORR
mechanism
key
ad
at
pyrazinic
site
proposed.
This
study
paves
way
developing
MCOF‐based
based
on
linkage
effect.
Язык: Английский
A Review on Photocatalytic Hydrogen Peroxide Production from Oxygen: Material Design, Mechanisms, and Applications
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
17(1), С. 42 - 66
Опубликована: Дек. 23, 2024
Hydrogen
peroxide
(H2O2)
finds
extensive
applications
in
various
industries,
particularly
the
environmental
field.
The
photocatalytic
production
of
H2O2
through
oxygen
reduction
reaction
(ORR)
or
water
oxidation
(WOR)
offers
a
promising
approach.
However,
several
challenges
hinder
effective
on-site
production,
such
as
rapid
electron–hole
pair
recombination,
inefficient
visible
light
utilization,
and
limited
selectivity
formation.
Thus,
developing
efficient
photocatalysts
to
overcome
these
is
crucial.
This
review
comprehensively
outlines
development
their
modification
techniques.
It
also
summarizes
compares
yield
apparent
quantum
among
with
without
use
organic
sacrificial
reagents.
Density
functional
theory
(DFT)
calculations
propose
band
structure
mechanisms
underlying
H2O2.
Finally,
this
explores
potential
photocatalytically
produced
guides
design
optimization
photocatalysts,
facilitating
continued
advancement
application
contexts.
Язык: Английский