Catalysts,
Год журнала:
2023,
Номер
13(11), С. 1418 - 1418
Опубликована: Ноя. 6, 2023
Hydrogenation
stands
out
as
one
of
the
most
promising
techniques
for
converting
biomass-derived
molecules
into
valuable
products.
The
expected
products
upgrading
biomass
include
hydrocarbon,
oxygenate,
and
methane.
Ni-based
catalysts
have
attracted
considerable
interest
owing
to
their
unique
properties
relatively
low
cost.
In
this
work,
NiO
prepared
by
calcination
urea
precipitation
methods,
namely
NiO–C
NiO–U,
is
investigated
hydrogenation
anisole.
It
found
that
reaction
temperature
exerts
a
significant
influence
on
pathways.
At
150
°C,
C–reduced
proves
more
inclined
towards
hydrogenation,
while
U–reduced
demonstrates
tendency
hydrodeoxygenation
(HDO).
Moreover,
rises,
both
nickel
change
route
hydrogenolysis
eventually
only
produce
methane
at
300
whereas
metallic
Ni
formed
catalytic
active
phase.
situ
FTIR
experiments
suggest
pathway
formation
This
work
investigates
from
molecules.
Surface Science Reports,
Год журнала:
2024,
Номер
79(3), С. 100637 - 100637
Опубликована: Июнь 8, 2024
The
synthesis
and
characterization
of
two
dimensional
materials
are
in
the
focus
nanomaterial
surface
science,
heterogeneous
catalytic
nanoelectronic
research
laying
basis
for
various
technological
applications.
Hexagonal
boron
nitride
(h-BN)
is
an
important
member
3D
reduced
materials.
Atomically
clean
sp2-hybridized
2D
nano-layers
can
be
grown
on
metal
supports
by
different
chemical
physical
vapor
deposition
techniques.
In
case
a
significant
lattice
mismatch
strong
interaction
at
h-BN/metal
interface,
periodically
undulating
monolayer
-
so-called
"moirè
structure"
formed.
present
review,
we
address
some
characteristics
h-BN
prepared
several
surfaces,
its
application
as
template
individual
atoms,
clusters
molecules.
Moreover,
experimental
findings
collected
about
features
applications
nanosheets
supporting
We
highlight
results
recent
science
studies,
which
emphasize
unique
role
including
nanomeshes
characteristic
adsorption
properties,
stability
activity.
few
layer
defective
involving
their
also
subject
review.
comprehensive
overview
electronic
vibrational
states
nanoparticles
(covered
adsorbates,
well)
monitored
spectroscopy
tools,
e.g.
XPS,
ARPES,
UPS,
LEIS,
AES,
STS
HREELS.
elaborate
structural
morphological
information
nanoobjects
obtained
scanning
probe
microscopy
(SPM).
It
highlighted
that
density
functional
theory
(DFT)
considered
very
complementary
technique
contributing
to
better
understanding
results.
Beside
updated
recollection
key
findings,
outline
future
directions
heterostructures
h-BN-based
systems.
ACS Catalysis,
Год журнала:
2024,
Номер
14(15), С. 11845 - 11856
Опубликована: Июль 24, 2024
Enhancing
catalyst
durability
is
a
critical
concern
in
the
partial
oxidation
of
methane
(POM)
to
syngas
since
reaction
operated
at
high
temperatures
(>600
°C).
Alongside
sintering
and
coke
deposition,
deactivation
supported
Ni
often
due
situ
active
metallic
nanoparticles
into
inactive
cations
during
POM
reaction.
Herein,
Ni/BN
was
developed
by
introducing
functional
CeOx
as
promoter
stabilize
sites.
The
optimized
4Ni/7.5Ce/BN
catalyst,
comprising
4
wt
%
7.5
Ce
on
BN,
exhibits
enhanced
stability
continuous
testing
600
°C
for
125
h
without
any
deactivation,
which
comparable
that
noble
metal
catalysts.
Comprehensive
investigations
reveal
maintaining
state
under
atmosphere
crucial
catalyst.
construction
BN
effectively
inhibits
migration
catalytically
Ni0
species.
RSC Advances,
Год журнала:
2024,
Номер
14(30), С. 21230 - 21240
Опубликована: Янв. 1, 2024
Hexagonal
boron
nitride
nanosheets
(BNNSs)
possess
remarkable
potential
for
various
applications
due
to
their
unprecedented
properties.
However,
the
scalable
production
of
BNNSs
with
both
expansive
surface
and
high
solubility
continues
present
a
significant
challenge.
Herein,
we
propose
an
innovative
efficient
two-step
method
manufacturing
hydroxyl-functionalized
(OH-BNNSs).
Initially,
hydroxyl
groups
are
covalently
attached
bulk
hexagonal
(h-BN)
surfaces
through
H2O2
treatment.
Then,
h-BN
undergoes
exfoliation
on
account
sudden
increase
in
interlayer
gas
pressure
generated
by
vigorous
decomposition
alkali
solutions,
resulting
creation
OH-BNNSs.
This
approach
produces
relatively
large
flakes
average
dimension
1.65
μm
yield
45.2%.
The
resultant
OH-BNNSs
exhibit
stability
dispersibility
range
solvents.
Their
integration
into
thermoplastic
polyurethane
(TPU)
significantly
enhances
thermal
conductivity
stability,
attributed
excellent
compatibility
resin
matrix.
study
represents
advancement
functionalization
h-BN,
opening
new
avenues
its
promising
polymer
composites.
