ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(45), P. 61970 - 61982
Published: Oct. 31, 2024
This
study
successfully
developed
a
foam
copper
(CF)-based
CoMnOx@Co3O4/CF
composite
catalyst,
achieving
efficient
thermal
catalytic
oxidation
of
paraxylene
through
multifactor
optimization
synthesis
conditions.
At
Co:Mn
molar
ratio
2:1
and
calcination
temperature
450
°C,
the
catalyst
exhibited
outstanding
performance,
with
T90
as
low
246
significantly
lower
than
that
catalysts
synthesized
under
other
Additionally,
BET,
XPS,
Raman,
EPR,
H2-TPR
test
results
indicate
possesses
high
specific
surface
area,
abundant
oxygen
vacancies,
distribution
multivalent
Co
Mn
species,
hydrogen
reduction
temperature,
all
which
contribute
to
activity
CoMnOx@Co3O4/CF.
Furthermore,
in
situ
DRIFTS
confirmed
on
follows
Mars–Van
Krevelen
(MvK)
mechanism.
The
proposed
reaction
pathway
begins
methyl
group
paraxylene,
followed
by
opening
benzene
ring
further
CO2
H2O.
innovative
structural
design
excellent
performance
this
provide
new
insights
solutions
for
industrial
treatment
VOCs.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(18)
Published: Jan. 14, 2024
Abstract
Optimally
increasing
the
catalytic
activity
of
Co
3
O
4
‐based
materials
is
crucial
for
promoting
their
practical
applications
acetone
detection;
however,
this
still
remains
challenging.
Herein,
a
strategy
proposed
in
work
to
increase
toward
oxidation
through
synergistic
effect
boron
doping
and
chemical
reduction,
which
can
substantially
improve
sensing
performance
detection.
The
characterization
results
confirm
that
present
facilitates
formation
more
oxygen
vacancies
increases
content
2+
ions
serving
as
active
sites.
As
expected,
optimal
sensor
yields
higher
response
.
To
extend
application
auxiliary
diagnosis
diabetes
exhaled
breath,
sensors
distinguished
between
concentrations
breath
healthy
individuals
simulated
patients
with
diabetes.
Detailed
gas‐sensing
measurements
reveal
enhanced
attributed
increased
by
Mars–van
Krevelen,
Langmuir–Hinshelwood,
Eley–Rideal
mechanisms.
This
study
provides
new
insights
into
fabrication
high‐performance
metal
oxide‐based
gas
improving
materials.
Environmental Science & Technology,
Journal Year:
2025,
Volume and Issue:
59(2), P. 1034 - 1059
Published: Jan. 6, 2025
Water
vapor
is
a
significant
component
in
real
volatile
organic
compounds
(VOCs)
exhaust
gas
and
has
considerable
impact
on
the
catalytic
performance
of
catalysts
for
VOC
oxidation.
Important
progress
been
made
reaction
mechanisms
H2O
water
resistance
strategies
oxidation
recent
years.
Despite
advancements
technology,
most
still
exhibit
low
activity
under
humid
conditions,
presenting
challenge
reducing
adverse
effects
To
develop
water-resistant
catalysts,
understanding
mechanistic
role
implementing
effective
water-resistance
with
influencing
factors
are
imperative.
This
Perspective
systematically
summarizes
related
research
oxidation,
drawing
from
over
390
papers
published
between
2013
2024.
Five
main
proposed
to
clarify
their
H2O.
inhibition/promotion
introduced,
elucidating
various
VOCs.
Additionally,
different
kinds
discussed,
including
fabrication
hydrophobic
materials,
design
specific
structures
morphologies,
introduction
additional
elements
catalyst
modification.
Finally,
scientific
challenges
opportunities
enhancing
efficient
practical
applications
purification
highlighted.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(16), P. 14721 - 14732
Published: Aug. 17, 2023
Three
MnO2
samples
with
flower
(F-MnO2),
rod
(R-MnO2),
and
tube
(T-MnO2)
morphologies
were
constructed
herein
for
catalytic
toluene
oxidation.
T-MnO2
is
superior
to
the
other
two
in
terms
of
performance
water
resistance
stability
combustion.
Overall
structural
physicochemical
properties
characterized
by
X-ray
diffraction,
Raman
spectroscopy,
N2
adsorption–desorption,
H2
temperature-programmed
reduction,
O2
desorption,
photoelectron
desorption
verified
that
exhibited
larger
specific
surface
area,
stronger
reducibility,
more
plentiful
oxygen
species
than
F-MnO2
R-MnO2,
which
could
greatly
enhance
activation
mobility
species.
Notably,
situ
diffuse-reflectance
infrared
Fourier
transform
spectroscopy
was
conducted
investigate
relationship
between
activity
on
these
catalysts.
It
found
lattice
played
an
important
role
activation–oxidation
process
toluene,
difference
catalysts
led
obvious
changes
due
their
different
morphologies.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(9), P. 7201 - 7212
Published: April 24, 2024
The
advancement
of
cost-effective
Pt
catalysts
for
volatile
organic
compound
(VOC)
combustion
holds
significant
importance.
Enhancing
the
adsorption
and
activation
O2
VOCs
on
is
vital
VOC
oxidation
reaction.
In
this
study,
we
utilized
a
two-step
quenching
method
to
alter
iron
rust,
resulting
in
deposition
species
Sn-doped
Fe2O3
sample
(Ptq/Snq:Fe2O3).
Experiments
theoretical
calculations
revealed
that
both
process
Sn
dopants
would
induce
generation
oxygen
vacancies,
improving
mobility
Ptq/Snq:Fe2O3.
Also,
doping
enhance
interaction
between
support
modulate
Pt's
electronic
structure,
promoting
toluene
desorption
product
CO.
Thus,
developed
Ptq/Snq:Fe2O3
exhibited
boosted
toluene/acetone
activity,
achieving
90%
mineralization
rate
at
215
°C
acetone
228
°C,
respectively.
situ
diffuse
reflectance
infrared
Fourier
transform
spectroscopy
showcased
vacancy
with
modulated
structure
synergistically
heightened
acetone/toluene,
accelerated
ring
breakage
toluene,
brought
about
thorough
This
research
could
offer
potential
avenue
fine-tuning
active
sites
crucial
catalytic
processes.
