Surface Science and Technology,
Год журнала:
2023,
Номер
1(1)
Опубликована: Окт. 12, 2023
Abstract
Catalytic
CO
2
hydrogenation
to
valuable
chemicals
is
an
excellent
approach
address
the
increasingly
serious
“greenhouse
effect”
caused
by
emission
generated
from
utilizations
of
nonrenewable
fossil
energies,
while
such
a
process
limited
chemical
inertia
and
thermal
stability
molecule
complex
routes.
In
this
review,
we
first
summarized
recent
progresses
metal-oxide
nanocatalysts
considered
as
category
most
promising
catalysts
in
value-added
C1
including
CH
4
/CO,
formic
acid/formate,
methanol.
These
studies
involve
with
different
structural
factors
affecting
interfacial
catalysis
structures
both
metals
(type,
particle
size,
morphology/crystal
plane,
bimetal
alloy)
supports
crystal
phase,
composite)
their
(strong)
metal-support
interactions
so
identify
key
factor
determining
reaction
activity,
product
selectivity,
catalytic
hydrogenation.
Finally,
further
discuss
challenging
coupling
future
research
opportunities
for
tunable
conversion.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(4), С. 2264 - 2270
Опубликована: Янв. 23, 2023
The
limitations
of
conventional
strategies
in
finely
controlling
the
composition
and
structure
demand
new
promotional
effects
for
upgrading
reverse
water–gas
shift
(RWGS)
catalysts
enhanced
fuel
production.
We
report
design
synthesis
a
hetero-dual-site
catalyst
boosting
RWGS
performance
by
controllably
loading
Fe
atoms
at
neighboring
Pt
atom
on
surface
commercial
CeO2.
Fe–Pt/CeO2
exhibits
remarkably
high
catalytic
(TOFPt:
43,519
h–1)
CO2
to
CO
conversion
with
∼100%
selectivity
relatively
low
temperature
350
°C.
Furthermore,
retains
over
80%
activity
after
200
h
continuous
operation.
experimental
computational
investigations
reveal
"two-way
synergistic
effect",
where
can
not
only
serve
as
promotors
alter
charge
density
but
also
be
activated
excess
active
hydrogen
species
generated
atoms,
enhancing
stability.
ACS Nano,
Год журнала:
2023,
Номер
17(23), С. 23761 - 23771
Опубликована: Ноя. 20, 2023
Carbon
dioxide
(CO2)
hydrogenation
to
methane
(CH4)
is
regarded
as
a
promising
approach
for
CO2
utilization,
whereas
achieving
desirable
conversion
efficiency
under
mild
conditions
remains
significant
challenge.
Herein,
we
have
identified
ultrasmall
Ru
nanoparticles
(∼2.5
nm)
anchored
on
MnCo2O4
nanosheets
prospective
photothermal
catalysts
methanation
at
ambient
pressure
with
light
irradiation.
Our
findings
revealed
that
exhibit
dual
functionality
substrates
localized
temperature
enhancement
and
photocatalysts
electron
donation.
As
such,
the
optimized
Ru/MnCo2O4-2
gave
high
CH4
production
rate
of
66.3
mmol
gcat-1
h-1
(corresponding
5.1
mol
gRu-1
h-1)
96%
selectivity
230
°C
irradiation
(420-780
nm,
1.25
W
cm-2),
outperforming
most
reported
plasmonic
metal-based
catalysts.
The
mechanisms
behind
intriguing
catalytic
performance
improvement
were
substantiated
through
comprehensive
investigation
involving
experimental
characterizations,
numerical
simulations
density
functional
theory
(DFT)
calculations,
which
unveiled
synergistic
effects
enhanced
charge
separation
efficiency,
improved
reaction
kinetics,
facilitated
reactant
adsorption/activation
accelerated
intermediate
over
Ru/MnCo2O4.
A
comparison
study
showed
that,
identical
external
input
energy
during
reaction,
had
much
higher
compared
Ru/TiO2
Ru/Al2O3.
This
underscores
pivotal
role
played
by
supports
believed
engender
heightened
interest
in
metal
conditions.
Chemical Engineering Journal,
Год журнала:
2024,
Номер
492, С. 152283 - 152283
Опубликована: Май 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.
ACS Catalysis,
Год журнала:
2023,
Номер
13(10), С. 7132 - 7138
Опубликована: Май 11, 2023
Developing
efficient
non-precious-metal
catalysts
capable
of
selectively
converting
CO2
into
fuels
and
chemicals
is
desirable
yet
remains
a
challenge.
Ni-based
usually
exhibit
high
activity
in
methanation
reactions
but
low
selectivity
stability
the
reverse
water-gas
shift
(RWGS)
reaction.
Herein,
we
report
Ni
single-atom
catalyst
with
Ni–Nx
motifs
confined
N-doped
carbon
nanotubes
as
an
active,
selective,
stable
for
RWGS
reaction,
achieving
almost
100%
CO
STY
1.88
molCO
gNi–1
h–1
at
500
°C
atmospheric
pressure.
In
addition
to
weak
adsorption,
strong
adsorption
H2
active
site
were
found
be
responsible
catalytic
selectivity.
