ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(13), P. 9812 - 9828
Published: June 17, 2024
The
oriented
conversion
of
C1
molecules
including
CO,
CO2,
CH4,
and
CH3OH
has
received
great
attention
in
the
past
few
decades
because
its
essential
role
sustainable
chemistry.
Spinel
oxides
with
fine
hardness,
thermal
stability,
tunable
chemical
properties
are
advantageous
catalysts
or
precursors
activation
inert
for
production
high-value-added
chemicals.
This
review
provides
a
thorough
overview
recent
developments
spinel-structured
nanocatalysts
processes
thermal-driven
conversion,
highlighting
advantages
deriving
active
metals,
stabilizing
metal
cations,
constructing
adjacent
synergic
sites,
tuning
oxygen
vacancies.
Finally,
potential
challenges
development
directions
discussed
application
reactions.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
492, P. 152283 - 152283
Published: May 19, 2024
E-fuel
production,
which
is
achieved
using
atmospheric
or
biogenic
CO2
and
green
H2,
shows
promise
for
reducing
levels
curtailing
our
reliance
on
fossil
fuels.
Notably,
the
hydrogenation
of
to
CO
via
reverse
water–gas
shift
(RWGS)
reaction
(CO2
+
H2
↔
H2O)
plays
a
pivotal
role
in
commercial
e-fuel
production.
This
approach
preferred
over
direct
conversion
CO2,
remains
nascent
stage.
However,
endothermic
RWGS
energy-intensive
it
requires
high
operating
temperatures
(∼600–800
°C).
Therefore,
lowering
temperature
can
aid
achieving
energy
efficiency;
however,
this
restricts
catalytic
activity.
Furthermore,
low
less
than
400
°C
favor
exothermic
CH4,
resulting
CH4
being
predominant
product
instead
during
hydrogenation.
Consequently,
studies
catalysts
have
focused
as
well
selectivity
low-temperature
operation.
Among
various
candidates
catalysts,
Cu-based
are
targeted
herein
particularly
potent
systems.
Cu
exhibit
selectivity,
but
face
issues
such
vulnerability
sintering.
review
comprehensively
explores
from
their
fundamental
properties
(effects
particle
facets,
size,
dispersion)
latest
research
trends,
novel
preparation
methods
(deposition–precipitation,
atomic
layer
deposition,
ion
sputtering)
use
supports
(CeO2,
ZnO,
Mo2C)
promoters
(FeOx
alkali
metals),
future
directions
spinel
oxides
layered
double
hydroxides.
Chemistry - An Asian Journal,
Journal Year:
2024,
Volume and Issue:
19(4)
Published: Jan. 27, 2024
Abstract
With
the
continuous
increase
in
CO
2
emissions,
primarily
from
combustion
of
coal
and
oil,
ecosystem
faces
a
significant
threat.
Therefore,
as
an
effective
method
to
minimize
issue,
Reverse
Water
Gas
Shift
(RWGS)
reaction
which
converts
towards
attracts
much
attention,
is
environmentally‐friendly
mitigate
climate
change
lessen
dependence
on
fossil
fuels.
Nevertheless,
inherent
thermodynamic
stability
kinetic
inertness
big
challenge
under
mild
conditions.
In
addition,
it
remains
another
fundamental
RWGS
owing
selectivity
issue
caused
by
further
hydrogenation
CH
4
.
Up
till
now,
series
catalysis
systems
have
been
developed
for
reduction
produce
CO.
Herein,
research
progress
well‐performed
heterogeneous
catalysts
were
summarized,
including
catalyst
design,
catalytic
performance
mechanism.
This
review
will
provide
insights
into
efficient
utilization
promote
development
reaction.
ACS Catalysis,
Journal Year:
2022,
Volume and Issue:
12(7), P. 4026 - 4036
Published: March 16, 2022
Intermetallic
compounds
(IMCs)
are
widely
employed
in
heterogeneous
catalysis.
In
this
paper,
the
performance
and
mechanism
of
In–Ni
IMCs
with
different
structures
(InNi3,
InNi2,
InNi,
In3Ni2)
reverse
water
gas
shift
(RWGS)
reaction
reported.
situ
spectroscopic
microscopic
characterizations
combined
density
functional
theory
(DFT)
calculation
demonstrated
that
increase
In/Ni
ratio
enhanced
selectivity
CO
by
inhibiting
adsorption
CO*
via
"active
site
isolation."
Ni,
as
active
CO2
hydrogenation
reaction,
was
isolated
IMCs.
Meanwhile,
DFT
revealed
preferentially
produced
rather
than
CH4
and/or
CH3OH,
path
for
RWGS
is
redox
over
IMC.
At
500
°C,
catalyst
achieved
a
99.8%
at
conversion
50.7%
more
250
h
without
any
deactivation,
rendering
it
promising
candidate
industrial
application.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(16)
Published: Feb. 2, 2023
Abstract
Reverse
water‐gas
shift
(RWGS)
reaction
is
the
initial
and
necessary
step
of
CO
2
hydrogenation
to
high
value‐added
products,
regulating
selectivity
still
a
fundamental
challenge.
In
present
study,
an
efficient
catalyst
(CuZnN
x
@C‐N)
composed
by
Zn
single
atoms
Cu
clusters
stabilized
nitrogen
sites
reported.
It
contains
saturated
four‐coordinate
Zn‐N
4
low
valence
CuN
clusters.
Monodisperse
induces
aggregation
pyridinic
N
form
structures,
which
show
strong
Lewis
basicity
has
adsorption
for
*CO
*COOH
intermediates,
but
weak
*CO,
thus
greatly
improves
conversion
selectivity.
The
calcined
at
700
°C
exhibits
highest
43.6%
under
atmospheric
pressure,
18.33
times
Cu‐ZnO
close
thermodynamic
equilibrium
rate
(49.9%)
.
catalytic
process,
not
only
adsorbs
activates
H
,
also
cooperates
with
adjacent
structures
jointly
activate
molecules
further
promotes
This
synergistic
mechanism
will
provide
new
insights
developing
catalysts.