Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
137(1)
Published: Oct. 17, 2024
Abstract
The
direct
conversion
and
efficient
utilization
of
methane
pose
a
critical
scientific
challenge.
Indirect
activation
via
reactive
oxygen
species
(ROS)
offers
high
probability
contact
with
efficiency
under
mild
conditions.
However,
reported
product
yields
are
suboptimal
due
to
challenges
in
activating
facilitating
mass
transfer
suspension
systems.
We
propose
the
use
contact‐electro‐catalysis
(CEC),
employing
polydopamine
(PDA)
as
catalyst
that
undergoes
electron
ultrasound,
generating
ROS
drives
partial
oxidation
(POM).
Corresponding
experimental
results
indicate
CH
3
OH
most
HCHO
produced
directly
from
4
.
Furthermore,
through
situ
characterizations,
we
have
shown
light
pretreatment
catalysts
an
oxygenated
atmosphere
facilitates
forming
more
C=O
functional
groups
strong
electron‐withdrawing
properties,
thereby
significantly
enhancing
overall
yields,
particularly
for
OH.
Within
two
hours,
reach
1.5
mmol
g
cat
−1
0.9
This
work
introduces
novel
approach
POM,
while
highlighting
distinctive
catalytic
properties
PDA.
Advanced Sustainable Systems,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 8, 2024
Abstract
Constructing
heterostructure
is
a
promising
strategy
to
enhance
photocatalytic
performance.
Here,
cyano
and
carbon
dots/polypyrrole
(CDs/PPy)
co‐modified
nitride
(CPKCN)
constructed
for
H
2
O
generation.
It
interestingly
found
that
the
intermediates
formed
during
oxidation
polymerization
of
pyrrole
can
be
potential
electron
trapping
sites
reactive
sites.
In
addition,
localized
photoheat
produced
by
CDs/PPy
also
plays
an
active
role
in
improving
activity.
Moreover,
addition
leads
higher
negative
zeta
CPKCN,
which
favorable
attraction
sample
surface
+
.
These
features,
plus
positive
effect
groups,
collectively
boost
charge
transfer
improve
selectivity
two‐electron
reduction.
Therefore,
enhanced
generation
performance
developed
CPKCN
achieved,
with
rate
3.7
mmol
g
−1
h
under
visible
light
10
vol%
isopropanol
(IPA)
aqueous
solution,
apparent
quantum
yield
16.7%
at
420
nm
solar‐to‐chemical
conversion
efficiency
0.34%.
The
work
offers
new
insights
into
developing
efficient
photocatalysts
various
applications.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
137(1)
Published: Oct. 17, 2024
Abstract
The
direct
conversion
and
efficient
utilization
of
methane
pose
a
critical
scientific
challenge.
Indirect
activation
via
reactive
oxygen
species
(ROS)
offers
high
probability
contact
with
efficiency
under
mild
conditions.
However,
reported
product
yields
are
suboptimal
due
to
challenges
in
activating
facilitating
mass
transfer
suspension
systems.
We
propose
the
use
contact‐electro‐catalysis
(CEC),
employing
polydopamine
(PDA)
as
catalyst
that
undergoes
electron
ultrasound,
generating
ROS
drives
partial
oxidation
(POM).
Corresponding
experimental
results
indicate
CH
3
OH
most
HCHO
produced
directly
from
4
.
Furthermore,
through
situ
characterizations,
we
have
shown
light
pretreatment
catalysts
an
oxygenated
atmosphere
facilitates
forming
more
C=O
functional
groups
strong
electron‐withdrawing
properties,
thereby
significantly
enhancing
overall
yields,
particularly
for
OH.
Within
two
hours,
reach
1.5
mmol
g
cat
−1
0.9
This
work
introduces
novel
approach
POM,
while
highlighting
distinctive
catalytic
properties
PDA.
