ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(30), С. 40180 - 40189
Опубликована: Июль 17, 2024
Two
π-conjugated
covalent
organic
frameworks
(COFs)
with
nonring
imine
or
benzoxazole
ring
linkages
were
prepared
by
reacting
3,3′-dihydrooxybenzidine
(BDOH)
3,5-triformylbenzene
(Tb)
in
the
presence
absence
of
benzimidazole
(BDOH-Tb-IM
and
BDOH-Tb-BO).
Although
two
COFs
indicated
similar
composition,
crystalline
structures,
morphologies,
imine-based
BDOH-Tb-IM
exhibited
a
photocatalytic
H2O2
production
rate
2490
μmol·g–1·h–1
sacrificial
reagent-free
pure
water,
higher
than
that
benzoxazole-based
BDOH-Tb-BO-a
(1168
μmol·g–1·h–1).
The
activity
was
attributed
to
its
more
efficient
photoinduced
charge
separation
utilization
efficiency
different
2e–
ORR
active
sites
over
COFs.
This
study
demonstrated
an
available
effect
adjust
performance
between
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Июнь 2, 2025
Photoelectrochemical
(PEC)
synthesis
offers
a
sustainable
route
for
fine
chemicals
production,
yet
comprehending
and
modulating
the
reaction
processes
at
atomic
level
remains
challenge.
Herein,
we
develop
single-atom
Ir
decorated
Ti-doped
α-Fe2O3
photoanode
selective
PEC
of
adipic
acid
from
cyclohexanone
using
water
as
oxygen
source.
The
system
achieves
6.0
μmol
cm-2
h-1
production
with
~60%
Faradaic
efficiency
~88%
selectivity.
promotes
photogenerated
carrier
separation
transfer,
while
regulating
electronic
structure
to
optimize
its
adsorption
strength
OH-
cyclohexanone.
Mechanistic
studies
reveal
non-free-radical
pathway
level,
driven
by
holes
through
an
adsorbed
hydroxyl
transfer.
Notably,
integrating
amorphous
silicon-based
photocathode
leads
bias-free
device
that
enables
stable
over
80
hours,
underscoring
potential
light-driven
synthesis.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(30), С. 40180 - 40189
Опубликована: Июль 17, 2024
Two
π-conjugated
covalent
organic
frameworks
(COFs)
with
nonring
imine
or
benzoxazole
ring
linkages
were
prepared
by
reacting
3,3′-dihydrooxybenzidine
(BDOH)
3,5-triformylbenzene
(Tb)
in
the
presence
absence
of
benzimidazole
(BDOH-Tb-IM
and
BDOH-Tb-BO).
Although
two
COFs
indicated
similar
composition,
crystalline
structures,
morphologies,
imine-based
BDOH-Tb-IM
exhibited
a
photocatalytic
H2O2
production
rate
2490
μmol·g–1·h–1
sacrificial
reagent-free
pure
water,
higher
than
that
benzoxazole-based
BDOH-Tb-BO-a
(1168
μmol·g–1·h–1).
The
activity
was
attributed
to
its
more
efficient
photoinduced
charge
separation
utilization
efficiency
different
2e–
ORR
active
sites
over
COFs.
This
study
demonstrated
an
available
effect
adjust
performance
between
