Catalytic
oxidation
of
the
hazardous
DMF
exhaust
gas
presents
a
significant
challenge
in
balancing
activity
and
products
selectivity
(CO,NOx,N2,etc.).
It
is
found
that
Cu/H-MOR
demonstrates
superior
performance
for
compared
to
CuO
on
other
supports
(γ-Al2O3,HY,ZSM-5)
terms
product
stability.
The
geometric
electronic
structures
active
sites
have
been
regulated
by
CeO2
promoter,
leading
an
increase
ratio
(highly
dispersed
Cu+
specie).
As
result,
stability
catalyst
were
enhanced
oxidation.
However,
excessive
or
content
led
decreased
N2
due
over-high
activity.
also
revealed
Ce3+
species,
surface
acid
play
critical
role
internal
selective
catalytic
reduction
reaction
during
10Cu-Ce/H-MOR
(1/4)
exhibited
both
high
its
abundance
specie
as
well
species
sites.
Consequently,
demonstrated
widest
temperature
window
with
selectivity.
These
findings
emphasize
importance
modification
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(28), С. 12685 - 12696
Опубликована: Июль 3, 2024
Fabrication
of
robust
isolated
atom
catalysts
has
been
a
research
hotspot
in
the
environment
catalysis
field
for
removal
various
contaminants,
but
there
are
still
challenges
improving
reactivity
and
stability.
Herein,
through
facile
doping
alkali
metals
Pt
catalyst
on
zirconia
(Pt-Na/ZrO
ACS Catalysis,
Год журнала:
2024,
Номер
14(9), С. 7201 - 7212
Опубликована: Апрель 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.
