The
selective
hydrodeoxygenation
(HDO)
of
renewable
lignocellulosic
biomass
is
great
importance
for
the
conversion
from
to
higher-value-added
chemicals
and
fuels.
However,
HDO
upgrading
always
demands
high
temperatures
H2
pressure.
Photothermal
catalysis
has
emerged
as
a
promising
strategy
enable
reaction
proceed
under
mild
conditions
with
excellent
selectivity.
Herein,
we
report
design
plasmonic
Pd/WO3-x
nanoflowers
enhanced
photothermal
catalytic
activity
efficient
vanillin.
have
been
synthesized
by
hydrothermal/in-situ
reduction
two-step
strategy,
they
exhibit
strong
photoabsorption
in
wide-range
(200-1100
nm),
charge
separation
efficiency.
Under
simulated
sunlight
irradiation
(0.3
W/cm2),
exhibits
an
impressive
vanillin
efficiency
up
86.74%
2-methoxy-4-methylphenol
(MMP)
selectivity
100%,
which
are
obviously
higher
than
those
(vanillin
=
52.93%,
MMP
43.8%)
dark.
Such
should
result
synergistic
effects
hot
electrons
heating
localized
surface
plasmon
resonance
(LSPR)
WO3-x.
Importantly,
catalyst
demonstrates
good
stability
even
after
5
cycles.
This
work
may
provide
novel
insight
into
catalysts
realization
conditions.
Chemical Engineering Journal,
Год журнала:
2024,
Номер
495, С. 153612 - 153612
Опубликована: Июнь 29, 2024
The
direct
cleavage
of
C−O
bonds
in
lignin
and
its
derivatives
via
hydrogenolysis
is
an
essential
reaction
process
for
conversion.
Herein,
we
design
a
MgAl2O4
supported
Ru
catalyst
using
facile
green
method
involving
ball
milling
microwave
heating.
optimal
catalyst,
0.5Ru/MgAl2O4,
displayed
enhanced
catalytic
performance
4−O−5
linkage
scission
compared
to
0.5Ru/Al2O3
0.5Ru/MgO,
achieving
tuenover
frequency
352.9
h−1
diphenyl
ether
(DPE)
0.5Ru/MgAl2O4
with
low
loading
achieved
complete
conversion
DPE,
43.8%
yield
cyclohexane
(CHE)
42.6%
cyclohexanol
(CHL)
after
2
h
at
160
°C
1.5
MPa
H2.
promising
activity
can
be
attributed
the
abundant
electron-rich
Ru0
species
high
dispersion
formed
on
MgAl2O4,
derived
from
strong
electron
transfer
support
Ru.
mechanism
bond,
followed
by
phenyl
ring
hydrogenation,
was
confirmed
rigorous
experiments.
This
work
provides
inspiring
idea
developing
efficient
heterogeneous
catalysts
utilization
resources
hydrogenolysis.
Abstract
The
selective
hydrogenation
of
biomass‐derived
benzoic
acid
(BA)
to
cyclohexane
carboxylic
(CCA)
is
vital
producing
fine
chemicals
from
renewable
sources.
Herein,
a
novel
nitrogen‐doped
carbon
supported
bimetallic
catalyst
(Ni
1
Co
/NC)
was
synthesized
via
PVP‐assisted
method
catalyze
the
BA
CCA.
Compared
with
non‐doped
Ni
/C
and
single
counterparts,
/NC
exhibited
substantially
enhanced
activity,
98.1%
yield
excellent
performance
attributed
NiCo
synergistic
effect
N‐doped
thin
layer,
which
could
increase
total
proportion
0
species
donating
electrons
thus
improve
H
2
adsorption
capacity,
activity
aromatic
rings
in
stability.
This
work
demonstrates
synergetic
between
bimetal
layer.
would
pave
way
for
rational
design
synthesis
high‐performance
non‐noble
catalysts
used
hydrogenation.
Abstract
Layered
double
hydroxides
(LDH)
have
significant
attention
in
recent
times
due
to
their
unique
characteristic
properties,
including
layered
structure,
variable
compositions,
tunable
acidity
and
basicity,
memory
effect,
ability
transform
into
various
kinds
of
catalysts,
which
make
them
desirable
for
types
catalytic
applications,
such
as
electrocatalysis,
photocatalysis,
thermocatalysis.
In
addition,
the
upcycling
lignocellulose
biomass
its
derived
compounds
has
emerged
a
promising
strategy
synthesis
valuable
products
fine
chemicals.
The
current
review
focuses
on
advancements
LDH‐based
catalysts
conversion
reactions.
Specifically,
this
highlights
structural
features
advantages
LDH
LDH‐derived
reactions,
followed
by
detailed
summary
different
methods
strategies
used
tailor
properties.
Subsequently,
hydrogenation,
oxidation,
coupling,
isomerization
reactions
biomass‐derived
molecules
are
critically
summarized
very
manner.
concludes
with
discussion
future
research
directions
field
anticipates
that
further
exploration
integration
cutting‐edge
technologies
hold
promise
addressing
energy
challenges,
potentially
leading
carbon‐neutral
or
carbon‐positive
future.
