Ru-promoted
cobalt
oxide
catalysts
were
prepared
by
a
synthesis
route
based
on
the
Kirkendall
effect
followed
an
acid
treatment
and
optimised
Ru
impregnation.
The
resulting
samples
characterised
N2
physisorption,
X-ray
diffraction,
scanning
electron
microscopy
techniques,
photoelectron
spectroscopy,
temperature
programmed
techniques
evaluated
in
oxidation
of
1,2-dichloroethane.
addition
improved
oxygen
mobility
as
well
amount
Co2+
Oads
species
at
surface
formation
Ru-O-Co
bond,
which
turn
governed
performance
reaction.
Moreover,
acid-etching
favoured
dispersion
strengthened
interaction
among
noble
metal
oxide.
Thus,
not
only
active,
chlorinated
pollutant
was
efficiently
converted
into
deep
products
relatively
low
temperatures,
but
also
quite
stable
when
operating
for
120
hours.
Catalysis Today,
Год журнала:
2023,
Номер
418, С. 114109 - 114109
Опубликована: Март 12, 2023
Coal
fly
ash
zeolites
(CFAZs)
with
increased
iron
oxide
content
were
prepared
by
double-stage
alkaline
conversion
of
high-iron
lignite
coal
ash.
Catalysts
modified
applying
radiofrequency
plasma
treatment
trifluoromethane
(RF
CHF3)
to
increase
their
surface
activity.
Textural,
compositional,
and
structural
characterization
the
parent
plasma-modified
performed
N2-physisorption,
X-ray
powder
diffraction
(XRD),
photoelectron
spectroscopy
(XPS)
Fourier-transform
infrared
(FT-IR)
spectroscopy.
Oxidation
state
coordination
species
studied
Mössbauer
spectroscopy,
UV-Vis
temperature-programmed
reduction
method
(TPR).
Acidic
properties
investigated
FT-IR
adsorbed
pyridine.
The
initial
samples
under
toluene
oxidation,
where
was
used
as
a
model
VOC.
iron-enriched
zeolite
found
exhibit
high
catalytic
activity
for
VOC
reaching
98%
rate
at
500
°C.
Despite
some
degradation
effects,
plasma-treated
catalysts
outperformed
untreated
ones
in
Furthermore,
CO2
adsorption
capacity
dynamic
conditions.
Although
showed
relatively
low
specific
area
(194
m2/g),
carbon
capture
3.8
mmol/g
measured.
It
significantly
exceeded
CFAZs
higher
area,
not
mention
pure
phase.
Abstract
The
second
3d‐transition
metal
incorporation
in
Ni‐(oxy)hydroxide
has
a
drastic
effect
on
alkaline
OER
and
alcohol
dehydrogenation
reactivity.
While
Mn
suppresses
the
OER,
it
greatly
improves
A
complete
reversal
of
reactivity
is
obtained
when
Fe
incorporated,
which
shows
better
performance
for
with
poor
role
3d‐metal
elusive
due
to
lack
systematic
mechanistic
studies.
In
this
report,
we
thoroughly
analyzed
series
M─Ni
(M
=
Fe,
Ni,
Mn)
(oxy)hydroxides
derived
from
electrochemical
activation
M‐MOF
grown
nickel
foam
its
activity
aliphatic,
benzyl
dehydrogenation.
With
help
pH‐dependence
kinetic
isotope
studies,
potential‐determining
step
(PDS)
rate‐determining
(RDS)
have
been
elucidated.
Hammett
analysis
revealed
critical
information
about
transition
state
offered
insight
into
hydrogen
atom
transfer
(HAT)
versus
hydride
(HT)
operative
various
heterobimetallic
electrocatalysts.
Further,
superior
NiMn
catalyst
PET
hydrolysate
electro‐oxidation
extended
afford
valuable
chemicals
concomitant
production
hydrogen.
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(7), С. 3003 - 3017
Опубликована: Фев. 13, 2024
In
this
work,
Ru-promoted
cobalt
oxide
catalysts
with
a
nanotube
morphology
were
prepared
by
synthesis
route
based
on
the
Kirkendall
effect
followed
an
acid
treatment
and
subsequent
optimized
Ru
impregnation.
The
resulting
samples
thoroughly
characterized
means
of
N2
physisorption,
X-ray
energy-dispersive
spectroscopy,
diffraction,
scanning
electron
microscopy
techniques,
photoelectron
temperature-programmed
techniques
(O2-temperature-programmed
desorption,
H2-temperature-programmed
reduction,
oxidation)
evaluated
in
gas-phase
oxidation
1,2-dichloroethane.
It
has
been
demonstrated
that
addition
improves
oxygen
mobility
as
well
amount
Co2+
Oads
species
at
surface
formation
Ru–O–Co
bond,
which
turn
governs
performance
reaction.
Moreover,
acid-etching
favors
dispersion
strengthens
interaction
among
noble
metal
oxide,
thereby
improving
thermal
stability
oxides.
Thus,
are
not
only
active,
chlorinated
pollutant
is
efficiently
converted
into
deep
products
relatively
low
temperatures,
but
also
quite
stable
when
operating
for
120
h.
