Chinese Journal of Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 21, 2025
Comprehensive
Summary
Photocatalytic
synthesis
of
hydrogen
peroxide
(H
2
O
)
from
air
and
water
presents
a
sustainable
efficient
alternative
to
the
traditional
anthraquinone
method.
Therefore,
design
photocatalysts
for
H
production
are
important.
In
this
work,
we
apply
nitrogen‐site
engineering
strategy
achieve
high‐performance
by
synthesizing
three
imine‐
linked
oligo(phenylenevinylene)‐based
covalent
organic
frameworks
(OPV‐COFs)
doped
with
different
numbers
nitrogen
atoms
(denoted
as
COF‐920‐
n
N,
=
0,
1,
3).
characterization
confirmed
high
crystallinity
porosity
COFs,
critical
photocatalysis.
Each
OPV‐COF
exhibited
ability
rapidly
synthesize
using
water,
COF‐920‐1N
achieving
highest
rate
4288
μmol·g
–1
·h
under
visible
light,
higher
than
those
most
other
reported
COFs.
Mechanism
studies
demonstrated
that
introduction
pyridine
at
junction
changes
electronic
structure
electron
transfer
path
within
enhancing
photogenerated
mobility
reducing
electron‐hole
recombination.
This
study
not
only
pioneers
class
OPV‐COFs
photocatalytic
,
but
also
sets
foundational
rational
COFs
in
applications.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
2D
covalent
organic
frameworks
(2D-COFs)
have
attracted
extensive
interest
in
solar
energy
to
hydrogen
conversion.
However,
insufficient
light
harvesting
and
difficult
exciton
dissociation
severely
limit
the
improvement
of
photocatalytic
activity
for
COFs,
thereby
impeding
progression
this
advanced
field.
In
work,
two
benzobisoxazole-bridged
fully
conjugated
2D-COFs
with
triazine
(COF-JLU44)
pyrene
(COF-JLU45)
units
were
constructed
first
time
via
Knoevenagel
polycondensation,
they
hold
long-range
ordered
structures,
largely
acceptable
surface
area,
fascinating
photoelectric
properties.
Significantly,
COF-JLU45
exhibits
an
impressive
evolution
rate
272.5
mmol
g-1
h-1
superior
reusability
presence
1.0
wt%
Pt
under
irradiation,
coupled
a
remarkable
apparent
quantum
yield
12.9%
at
long
wavelength
600
nm.
Multiple
spectroscopy
theoretical
simulation
demonstrate
ingenious
design
widen
its
absorption
effectively
promote
dissociation.
This
finding
contributes
valuable
insights
constructing
metal-free
photocatalysts
conversion
utilization.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 4, 2025
The
strong
metal-support
interaction
(SMSI)
in
supported
metal
catalysts
represents
a
crucial
factor
the
design
of
highly
efficient
heterogeneous
catalysts.
This
can
modify
surface
adsorption
state,
electronic
structure,
and
coordination
environment
metal,
altering
interface
structure
catalyst.
These
changes
serve
to
enhance
catalyst's
activity,
stability,
reaction
selectivity.
In
recent
years,
multitude
researchers
have
uncovered
range
novel
SMSI
types
induction
methods
including
oxidized
(O-SMSI),
adsorbent-mediated
(A-SMSI),
wet
chemically
induced
(Wc-SMSI).
Consequently,
systematic
critical
review
is
desirable
illuminate
latest
advancements
deliberate
its
application
within
article
provides
characteristics
various
most
methods.
It
concluded
that
significantly
contributes
enhancing
catalyst
selectivity,
increasing
catalytic
activity.
Furthermore,
this
paper
offers
comprehensive
extensive
electrocatalysis
hydrogen
evolution
(HER),
oxygen
(OER),
reduction
(ORR),
carbon
dioxide
(CO2RR).
Finally,
opportunities
challenges
faces
future
are
discussed.
Angewandte Chemie,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
Abstract
2D
covalent
organic
frameworks
(2D‐COFs)
have
attracted
extensive
interest
in
solar
energy
to
hydrogen
conversion.
However,
insufficient
light
harvesting
and
difficult
exciton
dissociation
severely
limit
the
improvement
of
photocatalytic
activity
for
COFs,
thereby
impeding
progression
this
advanced
field.
In
work,
two
benzobisoxazole‐bridged
fully
conjugated
2D‐COFs
with
triazine
(COF‐JLU44)
pyrene
(COF‐JLU45)
units
were
constructed
first
time
via
Knoevenagel
polycondensation,
they
hold
long‐range
ordered
structures,
largely
acceptable
surface
area,
fascinating
photoelectric
properties.
Significantly,
COF‐JLU45
exhibits
an
impressive
evolution
rate
272.5
mmol
g
−1
h
superior
reusability
presence
1.0
wt%
Pt
under
irradiation,
coupled
a
remarkable
apparent
quantum
yield
12.9%
at
long
wavelength
600
nm.
Multiple
spectroscopy
theoretical
simulation
demonstrate
ingenious
design
widen
its
absorption
effectively
promote
dissociation.
This
finding
contributes
valuable
insights
constructing
metal‐free
photocatalysts
conversion
utilization.
Chinese Journal of Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 21, 2025
Comprehensive
Summary
Photocatalytic
synthesis
of
hydrogen
peroxide
(H
2
O
)
from
air
and
water
presents
a
sustainable
efficient
alternative
to
the
traditional
anthraquinone
method.
Therefore,
design
photocatalysts
for
H
production
are
important.
In
this
work,
we
apply
nitrogen‐site
engineering
strategy
achieve
high‐performance
by
synthesizing
three
imine‐
linked
oligo(phenylenevinylene)‐based
covalent
organic
frameworks
(OPV‐COFs)
doped
with
different
numbers
nitrogen
atoms
(denoted
as
COF‐920‐
n
N,
=
0,
1,
3).
characterization
confirmed
high
crystallinity
porosity
COFs,
critical
photocatalysis.
Each
OPV‐COF
exhibited
ability
rapidly
synthesize
using
water,
COF‐920‐1N
achieving
highest
rate
4288
μmol·g
–1
·h
under
visible
light,
higher
than
those
most
other
reported
COFs.
Mechanism
studies
demonstrated
that
introduction
pyridine
at
junction
changes
electronic
structure
electron
transfer
path
within
enhancing
photogenerated
mobility
reducing
electron‐hole
recombination.
This
study
not
only
pioneers
class
OPV‐COFs
photocatalytic
,
but
also
sets
foundational
rational
COFs
in
applications.
