In
this
study,
we
demonstrate
that
the
combination
of
seed-mediated
growth
routes
with
pulsed
laser
irradiation
produces
high-quality
colloidal
AuPdPt
alloy
nanocrystals
featuring
spherical
shapes,
tunable
compositions,
and
defined
numbers
atoms.
Nanomaterials,
Год журнала:
2023,
Номер
13(17), С. 2434 - 2434
Опубликована: Авг. 27, 2023
Enhanced
catalysis
for
organic
transformation
is
essential
the
synthesis
of
high-value
compounds.
Atomic
metal
species
recently
emerged
as
highly
effective
catalysts
reactions
with
high
activity
and
utilization.
However,
developing
efficient
atomic
always
an
attractive
challenging
topic
in
modern
chemical
industry.
In
this
work,
we
report
preparation
enhancement
nitrogen-
sulfur-codoped
holey
graphene
(NSHG)
anchoring
Pd.
When
employed
catalyst
nitroarenes
reduction
reactions,
resultant
Pd/NSHG
composite
exhibits
remarkably
catalytic
due
to
co-existence
dual-active
components
(i.e.,
catalytically
active
NSHG
support
homogeneous
dispersion
Pd).
4-nitrophenol
(4-NP)
reaction,
efficiency
(turnover
frequency)
3.99
×
10-2
mmol
4-NP/(mg
cat.·min),
which
better
than
that
metal-free
nitrogen-doped
(NHG)
(2.3
10-3
cat.·min))
carbocatalyst
(3.8
cat.·min)),
conventional
Pd/C
other
reported
metal-based
catalysts.
This
work
provides
a
rational
design
strategy
loaded
on
doped
support.
The
component
(DACC)
also
anticipated
bring
great
application
potentials
broad
range
fields,
such
synthesis,
environment
treatment,
energy
storage
conversion.
ACS Applied Nano Materials,
Год журнала:
2023,
Номер
6(5), С. 3254 - 3267
Опубликована: Фев. 21, 2023
The
research
on
various
bimetallic
nanoparticles
(NPs)
is
rapidly
expanding
due
to
their
widespread
applications.
However,
the
formation
of
nanostructures
in
a
facile
way
remains
challenging.
In
present
study,
an
octahedral
(Oh)
PdFe
alloy
nanostructure
was
designed
by
following
aqueous
medium
synthesis
strategy.
Different
metal
precursor
ratios
were
varied
observe
change
shape
and
distribution
Oh
nanostructure.
Surprisingly,
increasing
Fe
content
directed
finer
growth
morphology.
Pd
amount
resulted
uneven
shape.
catalytic
activity
optimized
examined
for
Hiyama
cross-coupling,
degradation
dyes
scrutinized
at
different
pH.
suggested
nanostructured
catalyst
exhibited
improved
behavior
compared
other
nanocatalysts,
such
as
commercial
Pd/C
(95%),
monometallic
(98%),
NPs
(15%),
(85%),
cross-coupling
reaction.
with
less
more
demonstrated
98%
yield
excellent
reusability
up
fifth
consecutive
cycle,
conveying
80%
yield.
stability
nanocatalyst
mechanistic
aspects
supported
density
functional
theory.
both
anionic
dyes,
Congo
red,
Eosin
Y,
cationic
rhodamine
B,
performed
under
normal
along
acidic
basic
conditions.
reaction
completed
adequate
time
interval
all
no
morphology
synthesized
catalyst.
Frontiers in Chemistry,
Год журнала:
2023,
Номер
11
Опубликована: Май 25, 2023
Anisotropic
nanomaterials
are
materials
with
structures
and
properties
that
vary
depending
on
the
direction
in
which
they
measured.
Unlike
isotropic
materials,
exhibit
uniform
physical
all
directions,
anisotropic
have
different
mechanical,
electrical,
thermal,
optical
directions.
Examples
of
include
nanocubes,
nanowires,
nanorods,
nanoprisms,
nanostars,
so
on.
These
unique
make
them
useful
a
variety
applications,
such
as
electronics,
energy
storage,
catalysis,
biomedical
engineering.
One
key
advantages
is
their
high
aspect
ratio,
refers
to
ratio
length
width,
can
enhance
mechanical
electrical
properties,
making
suitable
for
use
nanocomposites
other
nanoscale
applications.
However,
nature
these
also
presents
challenges
synthesis
processing.
For
example,
it
be
difficult
align
nanostructures
specific
impart
modulation
property.
Despite
challenges,
research
into
continues
grow,
scientists
working
develop
new
methods
processing
techniques
unlock
full
potential.
Utilization
carbon
dioxide
(CO
2
)
renewable
sustainable
source
has
been
topic
increasing
interest
due
its
impact
reducing
level
greenhouse
gas
emissions.
used
improve
efficiency
CO
conversion
chemicals
fuels
using
processes
photocatalysis,
electrocatalysis,
thermocatalysis.
More
study
required
usage
consumption
scale
up
technologies
industrial
use.
The
nanomaterials,
surface
area,
tunable
morphology,
activity,
promising
catalysts
utilization.
This
review
article
discusses
briefly
about
various
approaches
towards
applications
highlights
opportunities
this
field
future
research.
Molecules,
Год журнала:
2023,
Номер
28(21), С. 7396 - 7396
Опубликована: Ноя. 2, 2023
The
design
and
fabrication
of
nanomaterials
with
controllable
morphology
size
is
critical
importance
to
achieve
excellent
catalytic
performance
in
heterogeneous
catalysis.
In
this
work,
cobalt
oxide
(Co3O4)
nanostructures
different
morphologies
(nanoplates,
microflowers,
nanorods
nanocubes)
were
successfully
constructed
order
establish
the
morphology-property-performance
relationship
catalysts.
structure
nanostructured
Co3O4
characterized
by
various
techniques,
as-prepared
was
studied
monitoring
reduction
p-nitrophenol
p-aminophenol
presence
excess
NaBH4.
found
be
strongly
dependent
on
their
morphologies.
experimental
results
show
that
pseudo-first-order
reaction
rate
constants
for
shapes
are,
respectively,
1.49
min-1
(nanoplates),
1.40
(microflowers),
0.78
(nanorods)
0.23
(nanocubes).
nanoplates
exhibited
highest
activity
among
four
nanostructures,
due
largest
specific
surface
area,
relatively
high
total
pore
volume,
best
redox
properties
abundance
defect
sites.
established
correlation
between
morphology,
property
work
will
offer
valuable
insight
into
application
as
a
potential
non-noble
metal
catalyst
reduction.
