ChemSusChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 30, 2024
Abstract
The
cleavage
and
functionalization
of
carbon‐carbon
bonds
are
crucial
for
the
reconstruction
upgrading
organic
matrices,
particularly
in
valorization
biomass,
plastics,
fossil
resources.
However,
inherent
kinetic
inertness
thermodynamic
stability
C‐C
σ
make
this
process
challenging.
Herein,
we
fabricated
a
glucose‐derived
defect‐rich
hierarchical
porous
carbon
as
heterogeneous
catalyst
oxidative
esterification
C(CO)‐C
bonds.
Systematic
investigations
revealed
that
structure
enhances
adsorption
O
2
ketones,
thereby
boosting
catalytic
efficiency
defects.
This
exhibits
performance
comparable
to
reported
nitrogen‐doped
or
metal
nanoparticle‐supported
materials,
well
transition
metal‐based
homogeneous
systems.
work
deepens
our
understanding
reaction
underlying
transformation
provides
insights
designing
efficient
carbon‐based
materials
transformations.
Catalysts,
Journal Year:
2025,
Volume and Issue:
15(3), P. 248 - 248
Published: March 5, 2025
As
a
type
of
sustainable
and
renewable
natural
source,
biomass-derived
5-hydroxymethyl
furfural
(HMF)
can
be
converted
into
high-value
chemicals.
This
study
investigated
the
interactions
between
silver
(Ag)
oxide
supports
with
varied
reducibility
their
contributions
to
tuning
catalytic
performance
in
selective
oxidation
HMF.
Three
representatives
manganese
dioxide
(MnO2),
zirconium
(ZrO2),
silicon
(SiO2)
were
selected
support
Ag
active
sites.
The
catalysts
characterized
by
techniques
such
as
STEM
(TEM),
Raman,
XPS,
H2-TPR,
FT-IR
spectroscopy
explore
morphology,
dispersion,
surface
properties,
electronic
states.
results
demonstrated
that
MnO2
highest
exhibited
superior
performance,
achieving
75.4%
HMF
conversion
41.6%
selectivity
for
2,5-furandicarboxylic
acid
(FDCA)
at
120
°C.
In
contrast,
ZrO2
SiO2
limited
capabilities,
mainly
producing
intermediate
products
like
FFCA
and/or
HMFCA.
ability
these
was
governed
reducibility,
because
it
determined
density
oxygen
vacancies
(Ov)
hydroxyl
groups
(OOH),
eventually
influenced
activity,
reaction
rate:
Ag/MnO2
(3214.5
molHMF·gAg−1·h−1),
Ag/ZrO2
(2062.3
Ag/SiO2
(1394.4
molHMF·gAg−1·h−1).
These
findings
provide
valuable
insights
rational
design
high-performance
chemical
conversion.
Green Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
study
explores
the
green
and
sustainable
catalytic
properties
of
pulcherrimin,
a
naturally
occurring
iron
chelate,
for
base-free
oxidation
5-hydroxymethylfurfural
(5-HMF)
to
high-value
products
such
as
2,5-furandicarboxylic
acid
(FDCA),
vital
precursor
renewable
bioplastics.
Pulcherrimin,
derived
from
Metschnikowia
pulcherrima,
selectively
oxidised
5-HMF
5,5-diformylfuran
(DFF)
at
100
°C,
while
120
proceeded
efficiently
FDCA
with
conversion
73.3
±
1.1%,
selectivity
89.0
1.9%
under
mild,
conditions.
Adding
mild
base
enhanced
overall
but
diverted
reaction
pathway
towards
5-hydroxymethyl-2-furancarboxylic
(HMFCA),
reducing
yield.
The
reusability
pulcherrimin
catalyst
was
tested
over
five
cycles,
retaining
activity
59.1%
39.8%.
These
findings
establish
promising,
water-tolerant
biocatalyst
potential
environmental
advantages,
operation
simplified
product
recovery,
contributing
greener
processes.
Eliminating
homogenous
co-catalyst
makes
process
by
avoiding
need
subsequent
neutralisation
steps
economic
costs.
PLoS ONE,
Journal Year:
2025,
Volume and Issue:
20(3), P. e0320604 - e0320604
Published: March 25, 2025
A
novel
N,
F-co-doped
bio-carbon
material
derived
from
cellulose
was
successfully
developed
via
a
convenient
and
simple
strategy.
The
obtained
characterized
with
various
techniques.
It
is
found
that
the
addition
of
F
precursors
can
benefit
formation
porous
structure
in
during
thermal
pyrolysis
dopants
have
significant
effect
on
electronic
native
carbon
atoms,
which
could
regulate
adsorption
property
catalytic
activity
material.
Furthermore,
Pd
NPs
supported
showed
excellent
selectivity
toward
aerobic
oxidation
biomass-derived
5-hydroxymethylfurfural
to
2,5-furandicarboxylic
acid
aqueous
media
under
mild
conditions.
played
an
important
role
reaction.
ChemCatChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 8, 2024
Abstract
2,5‐Furandicarboxylic
acid
(FDCA)
is
a
biomass‐derived
monomer
for
the
production
of
poly(ethylene
2,5‐furandicarboxylate)
(PEF),
which
novel
polyester
that
can
serve
as
sustainable
alternative
to
traditional
petroleum‐based
terephthalate)
(PET).
Currently,
industrial
FDCA
depends
on
thermo
catalytic
aerobic
oxidation
5‐hydroxymethylfurfural
(HMF)
using
heterogeneous
catalysts
in
aqueous
solution,
process
equivalent
homogeneous
bases
are
usually
needed
promote
hydroxymethyl
and
aldehyde
groups
simultaneously
improve
solubility
oxidative
products
via
forming
carboxylate.
The
involvement
massive
base
causes
risks
equipment
corrosion
necessitates
subsequent
product
separation
purification
with
large
amount
acid.
In
this
context,
base‐free
HMF
has
attracted
much
concern.
Nowadays,
by
developing
supported
multiple
sites,
diluted
substrate
finding
good
solvent
FDCA,
progress
been
achieved
field.
This
review
provides
state
art
catalysis
under
conditions,
highlighting
mechanism
shed
light
catalyst
design
principles.
