Chemistry - An Asian Journal,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 14, 2024
Abstract
Herein,
we
report
an
inexpensive
first‐row
transition
metal
Ni
heterogeneous
catalytic
system
for
the
C
sp
3
‐mono
alkylation
of
fluorene
using
alcohols
as
alkylating
agents
via
borrowing
hydrogen
strategy.
The
protocol
displayed
versatility
with
high
yields
desired
products
various
types
primary
alcohols,
including
aryl/hetero
aryl
methanols,
and
aliphatic
agents.
catalyst
NPs@N−C
was
synthesized
high‐temperature
pyrolysis
strategy,
ZIF‐8
sacrificial
template.
characterized
by
XPS,
HR‐TEM,
HAADF‐STEM,
XRD
ICP‐MS.
is
stable
even
in
air
at
room
temperature,
excellent
activity
could
be
recycled
5
times
without
appreciable
loss
its
activity.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 8, 2025
Abstract
For
size‐sensitive
catalytic
reaction
systems,
precise
control
of
geometric
size
heterogeneous
transition
metal
catalysts,
especially
for
non‐noble
metals,
is
in
desperate
need
and
also
a
great
challenge.
Here,
highly
dispersed
Ni
nanoparticles
(NPs)
anchored
within
mesoporous
silica
(MS)
fabricated
through
hybrid
strategy
amino‐modification
vacuum‐impregnation.
The
NPs
Ni/MS
catalyst
can
be
precisely
regulated
from
2.2
to
12.6
nm,
causing
variation
the
proportion
low
high
coordination
sites
atoms.
catalysts
show
volcanic
trend
between
2‐methoxy‐4‐methylphenol
(MMP)
yield
geometry
hydrodeoxygenation
(HDO)
bio‐derived
vanillin,
Ni/MS‐4.8
with
middle
(4.8
nm)
shows
optimal
HDO
performance
highest
MMP
productivity
19.5
g
−1
h
.
DFT
calculation
demonstrates
that
medium‐sized
possesses
abundant
low/high
coordinated
atoms,
wherein
atoms
facilitate
adsorption
H
2
promote
dissociation
activating
C═O
C─O
bonds,
thus
displays
superior
reaction.
This
work
paves
way
applicating
catalysis.
Materials,
Journal Year:
2025,
Volume and Issue:
18(1), P. 195 - 195
Published: Jan. 5, 2025
The
efficient
hydrogenation
of
1-butene
is
an
industrially
significant
reaction
for
producing
fuels
and
value-added
chemicals.
However,
achieving
high
catalytic
efficiency
stability
remains
challenging,
particularly
cost-effective
materials,
such
as
Ni.
In
this
study,
we
developed
a
porous
Ni-coated
Ni
foam
catalyst
by
electrostatic
spray
deposition
to
address
these
challenges.
exhibited
turnover
frequency
approximately
10
times
higher
than
that
either
or
alone.
This
enhancement
was
attributed
the
formation
interfacial
active
sites,
which
facilitated
improved
reactant
adsorption
activation
during
hydrogenation.
technique
ensured
uniform
controlled
coating,
enabling
precise
engineering
structure
interface.
post-deposition
heat
treatment
further
optimized
enhance
structural
integrity
performance.
study
highlights
importance
interface
optimization
in
design
provides
valuable
insights
into
development
Ni-based
catalysts
industrial
applications.
These
findings
emphasize
potential
versatile
method
fabricating
advanced
systems.
Chinese Journal of Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 7, 2025
Comprehensive
Summary
The
development
of
sustainable
and
efficient
catalytic
systems
for
the
formation
C—C,
C—N,
C—O
bonds
is
a
fundamental
goal
in
modern
synthetic
chemistry.
We
present
biomass‐derived
Cu/Chitosan‐800
catalyst
that
facilitates
range
carbenoid
insertion
reactions
into
C—H,
N—H,
O—H
bonds.
This
demonstrates
remarkable
activity,
enabling
functionalization
diverse
substrates,
including
late‐stage
modification
drug
molecules
with
up
to
95%
yield
good
recyclability.
Our
findings
highlight
catalyst's
potential
advancing
environmentally
friendly
chemical
transformations,
offering
promising
tool
pharmaceutical
synthesis
organic
synthesis.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
Biphasic
system
not
only
presents
a
promising
opportunity
for
complex
catalytic
processes,
but
also
is
grand
challenge
in
efficient
tandem
reactions.
As
an
emerging
solar‐to‐chemical
conversion,
the
visible‐light‐driven
and
water‐donating
hydrogenation
combines
sustainability
of
photocatalysis
economic‐value
hydrogenation.
However,
key
challenging
point
to
couple
water‐soluble
photocatalytic
hydrogen
evolution
reaction
(HER)
with
oil‐soluble
Herein,
we
employed
metal–organic
frameworks
(MOFs)
CdS
nanorods
construct
MOF‐CdS
dual‐layer
Pickering
emulsion
(water
oil,
W/O),
which
compartmented
aqueous
phase
HER
oil
The
hydrophobic
MOF
hydrophilic
were
isolated
at
inner
outer
layers
W/O
emulsion,
respectively.
molecularly
regulated
hydrophobicity
controlled
water
delivery
onto
photocatalysts,
realized
synergistic
regulation
In
cinnamaldehyde,
highest
yield
reached
187.37
mmol
⋅
g
−1
h
,
30
times
that
counterpart
without
(6.44
).
Its
apparent
quantum
43.24
%
co‐catalysts.
To
our
knowledge,
this
performance
top‐level
so
far.
Our
work
precise
water‐oil
interface
effectively
two
reactions
different
phases,
providing
new
perspective
catalysis.
Angewandte Chemie,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
Biphasic
system
not
only
presents
a
promising
opportunity
for
complex
catalytic
processes,
but
also
is
grand
challenge
in
efficient
tandem
reactions.
As
an
emerging
solar‐to‐chemical
conversion,
the
visible‐light‐driven
and
water‐donating
hydrogenation
combines
sustainability
of
photocatalysis
economic‐value
hydrogenation.
However,
key
challenging
point
to
couple
water‐soluble
photocatalytic
hydrogen
evolution
reaction
(HER)
with
oil‐soluble
Herein,
we
employed
metal–organic
frameworks
(MOFs)
CdS
nanorods
construct
MOF‐CdS
dual‐layer
Pickering
emulsion
(water
oil,
W/O),
which
compartmented
aqueous
phase
HER
oil
The
hydrophobic
MOF
hydrophilic
were
isolated
at
inner
outer
layers
W/O
emulsion,
respectively.
molecularly
regulated
hydrophobicity
controlled
water
delivery
onto
photocatalysts,
realized
synergistic
regulation
In
cinnamaldehyde,
highest
yield
reached
187.37
mmol
⋅
g
−1
h
,
30
times
that
counterpart
without
(6.44
).
Its
apparent
quantum
43.24
%
co‐catalysts.
To
our
knowledge,
this
performance
top‐level
so
far.
Our
work
precise
water‐oil
interface
effectively
two
reactions
different
phases,
providing
new
perspective
catalysis.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 3, 2025
Bimetallic
nanoparticles
serve
as
a
vital
class
of
catalysts
with
tunable
properties
suitable
for
diverse
catalytic
reactions,
yet
comprehensive
understanding
their
structural
evolution
under
operational
conditions
well
optimal
design
principles
remains
elusive.
In
this
study,
we
unveil
prevalent
surface
segregation
phenomenon
in
approximately
100
platinum-group-element-based
bimetallic
through
molecular
dynamics
simulations
and
derive
thermodynamic
descriptor
to
predict
behavior.
Building
on
the
generality
predictability
segregation,
propose
leveraging
intentionally
enrich
nanoparticle
noble-metal
atoms,
thereby
significantly
reducing
usage
while
maintaining
high
activity
stability.
To
validate
strategy,
investigate
dozens
platinum-based
propane
dehydrogenation
catalysis
using
first-principles
calculations.
Through
systematic
examination
sites
surfaces,
eventually
identify
several
candidates
featuring
stable
Pt-enriched
superior
activity,
confirming
feasibility
approach.
