ACS Catalysis,
Journal Year:
2022,
Volume and Issue:
12(21), P. 13506 - 13512
Published: Oct. 20, 2022
Structural
evolution
of
heterogeneous
catalysts
often
occurs
during
catalytic
reactions.
In
this
contribution,
the
structural
a
PtMn/SiO2
catalyst
reverse
water-gas
shift
(RWGS)
reaction
was
investigated
using
detailed
spectroscopic
characterizations.
The
results
show
that
Mn
atoms
on
PtMn
nanoparticle
surface
were
partially
removed
RWGS
reaction,
which
increases
ratio
Pt
sites
with
lower
coordination
number
surface,
leading
to
10-fold
increase
rate
in
n-C4H10
dehydrogenation
from
1.85
21.93
mol
gPt–1
h–1
and
decrease
apparent
activation
energy
50
33
kJ
mol–1.
This
work
provides
dimension
improving
performance
alkane
over
Pt-based
bimetallic
through
CO2
hydrogenation.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(7), P. 4719 - 4741
Published: March 23, 2023
Propylene
is
one
of
the
most
important
building
blocks
for
chemical
industry.
Traditional
propylene
production,
which
based
on
oil-based
cracking
processes,
being
challenged
by
drastic
changes
in
global
energy
situation.
The
nonoxidative
propane
dehydrogenation
(PDH)
technique
has
emerged
as
a
high-value-rising
and
promising
alternative
to
traditional
production
techniques
due
distinct
price
variance
between
propylene.
Although
this
been
commercialized
decades,
thermally
induced
deactivation
still
big
problem.
Substantial
progress
made
inhibit
catalysts.
In
review,
we
briefly
introduce
mechanism
catalytic
deactivation,
including
coke
deposition
sintering
active
compounds.
design
strategies
PDH
catalysts,
focused
improving
stability
recyclability,
are
highlighted
from
aspects
site
regulation,
metal–support
interaction
enhancement,
support
modification.
Finally,
current
status
prospects
future
catalyst
development
also
discussed.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(2), P. 757 - 775
Published: Jan. 2, 2024
The
studies
of
metal
phosphides
(MPs)
have
flourished
in
the
past
decades
due
to
their
exceptional
catalytic
performance
thermo-,
electro-,
and
photocatalysis.
In
this
review,
we
summarize
synthesis
methods
MPs
attribute
unique
properties
electronic,
geometric,
synergetic
modifications.
multifunctionality
phosphorus
doping
makes
phosphide
an
atypical
catalyst.
withdraws
electrons
from
sites,
isolates
provides
sites
simultaneously,
leading
high
activities
various
reactions,
such
as
hydroformylation,
hydrogen
evolution
reaction
(HER),
photocatalytic
H2
production.
variety
enables
rational
design
catalysts
based
on
requirements
different
reactions
expands
application
scenarios
MPs.
This
review
summarizes
structure–performance
relationship
MPs,
paving
way
for
future
catalyst
mechanism
studies.
The
rapid
growth
in
industrialization
and
population
has
resulted
the
generation
permanence
of
a
wide
variety
inorganic
organic
pollutants,
posing
potential
risks
to
environment
human
health.
degradation
(either
removal
or
reduction)
sensing
these
pollutants
from
various
environmental
media
(e.g.,
air,
water,
soil)
are
nowadays
important
problems
worldwide.
To
address
this
issue,
several
nanotechnologies
numerous
nanostructured
materials
composites
have
been
established
for
efficient
remediation
applications.
This
is
ascribed
their
large
surface
area
improved
characteristics
efficiency
(like
high
reactive
feature).
current
chapter
reports
such
as
filtration,
photocatalysis,
chemical
reactions,
absorption,
adsorption,
nanosensing,
etc.
It
also
offers
an
overview
use
environment.
Novel
materials,
involving
inorganic-based
nanomaterials
(NMs)
zero-valent
metal
NMs,
oxide-based
silica-based
NMs),
carbon-based
polymeric-based
well
nanocomposites
were
extensively
reported
discussed.
These
efficiently
employed
remediating
halogenated
herbicides,
volatile
compounds,
chlorinated
aromatic
aliphatic
hydrocarbons,
pharmaceuticals,
dyes,
heavy
metals,
biological
substances
antibiotics,
parasites,
bacteria,
viruses),
gases
(NOx,
CO,
SO2,
etc.).
Their
efficiency,
advantages,
limitations
compared
Moreover,
some
directions
future
studies
proposed.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(16), P. 11153 - 11163
Published: Aug. 8, 2023
Ethane
dehydrogenation
provides
an
opportunity
for
the
effective
utilization
of
shale
gas
and
production
ethene.
Up
to
now,
it
is
still
a
great
challenge
acquire
stable
ethane
catalyst
operated
under
high
temperature
reductive
atmospheres.
In
this
study,
we
prepared
Fe-based
supported
on
MgAl2O4
with
atomically
dispersed
iron
species
even
after
6
reaction–regeneration
cycles.
Sheet-like
morphology
spinel
structure
beneficial
dispersion
Fe
species.
The
undergoes
reduction,
sintering,
detachment
during
reaction,
as
evidenced
by
in
situ
High-Angle
Annular
Dark-Field
Scanning
Transmission
Electron
Microscopy
quasi-in
57Fe
Mössbauer
spectroscopy.
By
contrast,
introduction
CO2
leads
slow
deactivation,
where
only
partial
reduction
isolated
Fe3+
Fe2+
was
observed.
And
activity
could
be
restored
simple
O2
treatment.
current
work
sheds
light
design
high-efficient
catalysts.
AIChE Journal,
Journal Year:
2024,
Volume and Issue:
70(6)
Published: March 11, 2024
Abstract
Propylene
serves
as
a
crucial
feedstock
for
wide
range
of
industries
engaged
in
the
production
diverse
petrochemical
products.
Propane
dehydrogenation,
an
appealing
technology
aimed
at
supplanting
conventional
methodologies,
confronts
significant
hurdles
attributable
to
coke
deposition
and
sintering
Pt‐based
catalysts.
Here,
we
report
Ir
single
atom
encapsulated
silicalite‐1
zeolite
modified
with
Sn
atoms
electronic
promoters,
displaying
remarkable
activity
stability,
which
is
significantly
greater
than
previously
reported
Ir‐based
catalysts
comparable
majority
under
similar
industrial
conditions
(600°C,
C
3
H
8
/H
2
=
2/1).
Spectroscopies
results
reveal
that
introduction
promotes
transfer
electrons
from
atoms,
forming
electron‐rich
δ+
species.
DFT
calculations
show
unique
structure
lowers
energy
barrier
two‐step
dehydrogenation
well
favors
adsorption
propane
desorption
propylene,
thus
enhancing
stability.
AIChE Journal,
Journal Year:
2024,
Volume and Issue:
70(5)
Published: Feb. 4, 2024
Abstract
The
preparation
of
Co‐based
catalysts
with
a
single,
highly
dispersed
active
site
is
challenging
and
crucial
for
the
high‐performance
propane
dehydrogenation
(PDH)
owing
to
harsh
reaction
conditions.
Herein,
synergetic
strategies
including
catalyst
hydrothermal
treatment
CO
2
introduction
are
adopted
realize
stable
T
d
‐Co(II)
applied
PDH.
According
systematic
characterizations
catalytic
performance
evaluation,
facial
improves
C
3
H
6
formation
rate
from
456
771
mmol
g
Co
−1
h
stability
via
transformation
O
4
species
species.
Meanwhile,
further
into
PDH
system
as
protective
reagent
state
would
facilitate
superior
TOF
700
970
.
It
revealed
that
maintains
inhabiting
generation
metallic
spices.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(22), P. 14864 - 14873
Published: Nov. 2, 2023
The
CO2-assisted
oxidative
dehydrogenation
(CO2-ODH)
of
C3H8
provides
a
promising
process
for
producing
C3H6
and
utilizing
CO2.
In
this
study,
the
combination
zinc
iron
demonstrated
synergistic
effect,
leading
to
improved
catalytic
activity
stability.
importance
reducibility
ZnFe2Ox/S-1
has
been
highlighted
through
auxiliary
experiments
comprehensive
characterizations.
presence
sodium
additives
is
found
hinder
reduction
by
inducing
strong
interactions.
Furthermore,
during
initial
stage
reaction,
initiates
promotes
CO2
conversion
decarbonization
reactions.
precursor
ZnFe2O4
interaction
between
Zn
Fe
species,
along
with
formation
α-Fe
from
inside
outside,
effectively
prevent
occurrence
reforming
reaction
suppress
coking
deactivation
ZnFe2Ox/S-1.
This
study
fundamental
insights
into
Zn-
Fe-based
catalysts
in
reaction.
