Comparative Assessment of First-Row 3d Transition Metals (Ti-Zn) Supported on CeO2 Nanorods for CO2 Hydrogenation
Catalysts,
Год журнала:
2024,
Номер
14(9), С. 611 - 611
Опубликована: Сен. 11, 2024
Herein,
motivated
by
the
excellent
redox
properties
of
rod-shaped
ceria
(CeO2-NR),
a
series
TM/CeO2
catalysts,
employing
first-row
3d
transition
metals
(Ti,
V,
Cr,
Mn,
Fe,
Co,
Ni,
Cu,
and
Zn)
as
active
metal
phases,
were
comparatively
assessed
under
identical
synthesis
reaction
conditions
to
decipher
role
in
CO2
hydrogenation
process.
Notably,
volcano-type
dependence
activity/selectivity
was
disclosed
function
entity
revealing
maximum
for
Ni-based
sample.
Ni/CeO2
is
extremely
fully
selective
methane
(YCH4
=
90.8%
at
350
°C),
followed
Co/CeO2
45.2%),
whereas
rest
present
an
inferior
performance.
No
straightforward
relationship
between
performance
textural,
structural,
properties,
whereas,
on
other
hand,
volcano-shaped
trend
established
with
relative
concentration
oxygen
vacancies
partially
reduced
Ce3+
species.
The
observed
also
perfectly
aligned
previously
reported
atomic
hydrogen
adsorption
energy
activation
3d-orbital
electron
number,
key
intrinsic
electronic
features
each
conjunction
metal–support
interactions.
Язык: Английский
Facile preparation of triangular-like polycrystalline ceria as supporting carrier in catalysis exemplified by Ni/CeO2 catalyzed oxidation and hydrogenation reactions
Sustainable Chemistry for the Environment,
Год журнала:
2025,
Номер
unknown, С. 100243 - 100243
Опубликована: Март 1, 2025
Язык: Английский
Carbon Dioxide Activation and Hydrogenation into Value-Added C1 Chemicals over Metal Hydride Catalysts
Catalysts,
Год журнала:
2025,
Номер
15(5), С. 424 - 424
Опубликована: Апрель 26, 2025
The
utilisation
of
fossil
fuels
has
resulted
in
the
continuous
increase
anthropogenic
carbon
dioxide
(CO2)
emissions
and
led
to
significant
environmental
impacts.
To
this
end,
catalytic
hydrogenation
captured
CO2
into
value-added
C1
chemicals
attracted
great
attention.
In
case,
research
efforts
have
been
directed
towards
development
heterogeneous
catalysts.
Owing
unique
properties
functionalities
hydridic
hydrogen
(H−),
metal
hydrides
shown
promise
hydrogen-involved
processes.
This
is
attributed
their
enhanced
(H2)
absorption-desorption
reversibility
newly
developed
active
sites.
Nevertheless,
application
activation
overlooked.
review
paper,
we
provide
an
overview
recent
advances
using
hydride-based
materials.
Firstly,
reaction
mechanisms
toward
different
products
(CO,
CH4,
CH3OH
HCOOH)
are
introduced
better
understand
trend.
Thereafter,
highlight
challenges
developing
robust
hydride
catalysts
with
components
structures
that
enable
tuning
activity
selectivity.
A
brief
introduction
over
typical
homogeneous
complexes
also
presented.
Lastly,
conclusion,
future
outlook
perspectives
discussed.
Язык: Английский
Effective CO2 Thermocatalytic Hydrogenation with High Coke Resistance on Ni-CZ/Attapulgite Composite
Molecules,
Год журнала:
2024,
Номер
29(19), С. 4550 - 4550
Опубликована: Сен. 25, 2024
Converting
CO2
into
methane
is
considered
a
promising
and
economically
viable
technology
for
global
transportation
utilization
of
this
greenhouse
gas.
This
study
involves
the
preparation
Ni-CZ
(CeO2-ZrO2)/ATP
(attapulgite)
catalyst
through
co-precipitation
impregnation
methods.
XRD,
SEM,
TEM,
N2
absorption-desorption
isotherms,
XPS,
H2-TPR,
CO2-TPD,
TG/DSC,
Raman
were
adapted
to
characterize
obtained
samples.
Real-time
GC
was
used
measure
catalytic
performances
intensively
impact
Ni
loading
content
ATP
CZ
ratio
on
performance
products.
DRIFTs
monitor
interstitial
radicals
in
reactions
deduce
mechanisms.
The
results
indicate
that
composite
matrix
composed
assembled
demonstrated
higher
methanation
stability
better
carbon
deposition
resistance
ability
than
single
or
as
carrier,
which
should
be
attributed
improved
specific
surface
area
pore
volume
enhanced
dispersibility
species.
adoption
solid
solutions
improves
oxygen
storage
capability
catalyst,
thereby
providing
continued
mobile
O2−
accelerating
molecular
exchange
rate
reactions.
ideal
quantity
nickel
contents
CZA
15%,
conversion
decreases
at
elevated
temperatures
when
reaches
20%.
Among
tested
samples,
15Ni-0.8CZA
sample
showed
best
75%
100%
CH4
selectivity
400
°C.
After
50
h
tests,
still
remained
70.84%,
97.46%.
No
obvious
coke
detected
according
spectra
catalyst.
situ
DRIFTS
experiment
formate
main
intermediate
hydrogenation
reaction
Язык: Английский
Exploring heterogeneous Ru-based catalysts: CO2 hydrogenation towards formic acid, formaldehyde, and methanol
Discover Catalysis.,
Год журнала:
2024,
Номер
1(1)
Опубликована: Дек. 24, 2024
CO2
hydrogenation
into
value-added
chemicals
such
as
formic
acid,
formaldehyde,
and
methanol
is
a
critical
process
in
pursuing
the
reduction
of
greenhouse
gas
emissions
consolidating
low-carbon
economy.
In
this
review,
we
provide
comprehensive
overview
advancements
Ru-based
heterogeneous
catalysts
for
these
transformations
over
past
six
years.
We
emphasize
catalytic
mechanisms
underlying
reactions,
delving
key
factors
influencing
catalyst
performance,
including
Ru
nanoparticle
dispersion,
support
effects,
nature
catalyst,
reaction
conditions.
The
review
also
explores
extensive
characterization
techniques
used
to
elucidate
structure
activity,
highlighting
how
insights
contribute
design
more
efficient
systems.
Additionally,
present
an
recent
patents
on
hydrogenation,
emphasizing
their
practical
applications
industrial
relevance,
indicating
potential
future
developments
field.
Finally,
outcomes
identify
areas
further
research
development,
encouraging
innovation
valorization
through
processes.
Язык: Английский