Methane,
Journal Year:
2024,
Volume and Issue:
3(2), P. 359 - 379
Published: June 11, 2024
This
study
investigates
the
utilization
of
controlled
nanocatalysts
in
methane
conversion
reactions,
addressing
pressing
need
for
efficient
as
a
feedstock
valuable
chemicals
and
clean
energy.
The
methods
employed
include
comprehensive
review
recent
advancements
nanocatalyst
synthesis,
characterization,
application,
well
critical
analysis
underlying
mechanisms
controversies
activation
transformation.
main
findings
reveal
significant
progress
design
synthesis
nanocatalysts,
enabling
enhanced
activity,
selectivity,
stability
reactions.
Moreover,
highlights
importance
resolving
surrounding
metal–support
interactions
rational
catalyst
design.
Overall,
underscores
pivotal
role
nanotechnology
shaping
future
sustainable
energy
production,
providing
insights
guiding
research
directions
technological
developments
this
field.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(20)
Published: March 16, 2024
Abstract
The
conversion
of
methane
under
ambient
conditions
has
attracted
significant
attention.
Although
advancements
have
been
made
using
active
oxygen
species
from
photo‐
and
electro‐
chemical
processes,
challenges
such
as
complex
catalyst
design,
costly
oxidants,
unwanted
byproducts
remain.
This
study
exploits
the
concept
contact‐electro‐catalysis,
initiating
reactions
through
charge
exchange
at
a
solid–liquid
interface,
to
report
novel
process
for
directly
converting
conditions.
Utilizing
electrification
commercially
available
Fluorinated
Ethylene
Propylene
(FEP)
with
water
ultrasound,
we
demonstrate
how
this
interaction
promote
activation
molecules.
Our
results
show
that
yield
HCHO
CH
3
OH
can
reach
467.5
151.2
μmol
⋅
g
cat
−1
,
respectively.
We
utilized
electron
paramagnetic
resonance
(EPR)
confirm
evolution
hydroxyl
radicals
(⋅OH)
superoxide
(⋅OOH).
Isotope
mass
spectrometry
(MS)
was
employed
analyze
elemental
origin
OH,
which
be
further
oxidized
HCHO.
Additionally,
conducted
density
functional
theory
(DFT)
simulations
assess
reaction
energies
FEP
H
2
O,
O
4
these
implications
methodology,
its
potential
applicability
wider
array
gas‐phase
catalytic
reactions,
underscore
advance
in
catalysis.
Catalysts,
Journal Year:
2024,
Volume and Issue:
14(1), P. 58 - 58
Published: Jan. 12, 2024
The
direct
oxidation
of
methane
to
methanol
is
considered
challenging
due
the
intrinsically
low
reactivity
C–H
bond
and
formation
a
large
number
unstable
intermediates
(methanol,
formaldehyde,
formic
acid)
relative
yield
methane.
However,
promising
advances
have
recently
been
reported
in
this
area
based
on
use
electrochemical
systems
that
differ
from
traditional
thermal
catalysis.
In
review,
recent
indirect
conversion
with
homogeneous
catalysts
are
reviewed
discussed,
especially
under
low-temperature
conditions.
Finally,
limitations
current
technology
future
research
directions
discussed.
Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(5), P. 2165 - 2176
Published: Feb. 27, 2024
This
Perspective
navigates
the
transformative
synergy
between
machine
learning
(ML)
techniques
and
high-throughput
(HT)
methodologies
in
realm
of
photocatalysis,
aiming
to
overcome
inefficiencies
drawbacks
associated
with
existing
photocatalysts.
Pb-free
hybrid
perovskite
(HP)
nanocrystals
(NCs)
emerge
as
promising
candidates,
offering
distinctive
physicochemical
optical
attributes
addition
nontoxicity.
The
integration
HT
automated
methods
accelerates
synthesis
characterization
novel
HP
materials
while
also
addressing
challenges
obtaining
large,
high-quality
data
sets
for
training
ML
models.
proposed
multidisciplinary
approach,
combining
experimental
computational
simulations,
aims
unravel
complexities
photocatalytic
systems,
fostering
development
innovative
strategies
development.
convergence
techniques,
is
poised
revolutionize
photocatalysis
(PC),
propelling
field
into
an
era
unprecedented
discovery
innovation.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(17), P. 11968 - 11977
Published: April 17, 2024
The
direct
oxidation
of
CH4
to
C2H5OH
is
attractive
but
challenging
owing
the
intricate
processes
involving
carbon-chain
growth
and
hydroxylation
simultaneously.
inherent
difficulty
arises
from
strong
tendency
overoxidize
in
commonly
used
pressurized
powder
suspension
systems
rich
reactive
oxygen
radicals
(ROR),
which
are
specifically
designed
for
concentration
activation.
Meanwhile,
nucleophilic
attack
potent
ROR
on
C–C
bond
resulting
product
ultimately
leads
a
higher
selectivity
C1
oxygenates.
This
study
addresses
this
multifaceted
issue
by
designing
three-phase
interface
based
hydrophilic
floating
Fe(III)-cross-linked
macroporous
alginate
hydrogel
film
encapsulated
with
C3N4
[Fe(III)@ACN]
simultaneously
enhance
accessibility
H2O
molecules
active
sites
species
within
channel.
properties
Fe(III)@ACN
allow
situ
production
H2O2
through
water
reaction
under
irradiation.
concurrent
photoinduced
Fe(II)
triggers
Fenton
produce
•OH.
enhanced
mass
transfer
at
ensures
efficient
formation
•CH3
reacting
•OH,
facilitating
conversion
pathway
CH3OH
finally
•OH
present
comparable
concentrations.
Thus,
catalyst
exhibits
remarkable
96%
alcohol,
achieving
90%
alcohol
products.
rate
reaches
171.7
μmol
g–1
h–1
without
need
precious-metal
additive.
Materials Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
8(9), P. 2161 - 2172
Published: Jan. 1, 2024
The
strong
facet-dependent
activity
of
Au
co-catalysts
on
photocatalytic
nonoxidative
coupling
methane
was
studied.
octahedra
with
preferentially
exposed
(111)
facets
showed
the
best
performance
for
this
reaction.