ChemCatChem,
Journal Year:
2023,
Volume and Issue:
15(24)
Published: Nov. 2, 2023
Abstract
A
single–pot
conversion
of
furfural
(FAL)
to
alkyl
levulinates
(AL)
without
using
molecular
hydrogen
has
been
studied
over
ZSM‐5‐based
Ni−W
bimetallic
catalysts.
The
metal‐metal
and
metal‐support
interactions
in
the
bi‐metallic
catalyst
are
tailored
by
adopting
appropriate
synthesis
protocol
conceive
superior
catalytic
performance.
Insights
on
structural
properties
structure‐properties
relationship
is
described
data
obtained
through
various
characterization
techniques
like
FTIR,
XRD,
NH
3
‐TPD,
H
2
‐TPR,
TEM,
UV‐Vis,
X‐ray
photoelectron
spectroscopy.
method
observed
influence
activity
strongly.
present
study
indicates
formation
interface
enhances
performance
towards
AL
formation.
However,
probability
mainly
governed
protocol.
highlights
importance
selecting
a
suitable
route
achieve
desirable
for
obtaining
enhanced
Ni/W@ZSM‐5
developed
exhibited
excellent
production
ALs
from
FAL
primary
secondary
alcohols
as
source
well
reactant.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(9), P. 11453 - 11466
Published: Feb. 26, 2024
The
development
of
highly
active
acid–base
catalysts
for
transfer
hydrogenations
biomass
derived
carbonyl
compounds
is
a
pressing
challenge.
Solid
frustrated
Lewis
pairs
(FLP)
catalysis
possibly
solution,
but
the
this
concept
still
at
very
early
stage.
Herein,
stable,
phase-pure,
crystalline
hydrotalcite-like
were
synthesized
by
incorporating
cerium
cations
into
layered
double
hydroxide
(MgAlCe-LDH).
Besides
insertion
well-isolated
centers
surrounded
hydroxyl
groups,
formation
vacancies
near
aluminum
centers,
which
formed
hydroxides
(LDH)
lattice,
was
also
identified.
Depending
on
initial
concentration,
LDHs
with
different
Ce(III)/Ce(IV)
ratios
produced,
had
acidic
and
basic
characters,
respectively.
However,
character
these
related
to
actual
molar
ratios,
resulting
in
significant
differences
their
catalytic
performance.
as-prepared
structures
enabled
varying
degrees
hydrogenation
(Meerwein–Ponndorf–Verley
MPV
reduction)
biomass-derived
corresponding
alcohols
without
collapse
original
lamellar
structure
LDH.
markers
through
test
reactions
changed
as
function
amount
Ce(III)
indicating
role
Ce(III)–OH
units.
cooperative
interplay
between
sites
Ce(III)-containing
specimens
necessary
maximize
efficiency,
pointing
out
that
Ce-containing
LDH
potentially
commercial
solid
FLP
catalysts.
Furthermore,
crucial
surface
groups
negative
impact
interlamellar
water
molecules
activity
MgAlCe-LDH
demonstrated.
These
FLP-like
exhibited
excellent
performance
(cyclohexanol
yield
45%;
furfuryl
alcohol
51%),
competitive
benchmark
Sn-
Zr-containing
zeolite
catalysts,
under
mild
reaction
conditions,
especially
low
temperature
(T
=
65
°C).
Sustainable Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
8(17), P. 3775 - 3800
Published: Jan. 1, 2024
The
in
situ
hydrogenation
of
lignocellulosic
biomass
and
its
derivatives
using
liquid
hydrogen
carriers
heterogeneous
catalysts
provides
greener
sustainable
methodologies
for
producing
biofuels
chemicals.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(13), P. 11772 - 11779
Published: June 14, 2023
By
functionalizing
organic
ligands
and
regulating
metal
nodes,
metal–organic
frameworks
(MOFs)
exhibit
a
variety
of
catalytic
properties,
which
not
only
expand
their
application
in
biomass
conversion
but
also
increase
the
designability
catalysts.
Herein,
we
have
developed
synthesis
strategy
to
fabricate
multicomponent
nanocatalysts
(M–ZrO2/N–C,
M
=
Ni,
Fe,
Co,
Cu)
derived
from
postsynthetic
modification
zirconium–organic
using
Schiff
base
as
an
effective
bridge.
These
were
utilized
for
hydrogenation
bio-derived
methyl
levulinate
γ-valerolactone.
The
performance
demonstrates
that
Ni–ZrO2/N–C
possesses
superior
activity
(99.9%
94.7%
selectivity
γ-valerolactone),
could
be
attributed
synergy
effect
Ni
ZrO2
species.
Various
characterization
methods
(X-ray
photoelectron
spectroscopy
(XPS)
situ
diffuse
reflectance
infrared
Fourier
transform
(DRIFTS))
indicated
metallic
nickel
activated
H2,
introduction
provided
sufficient
Lewis
acid
sites,
accelerating
intramolecular
esterification
process.