Resolving the Nanostructure of Carbon Nitride‐Supported Single‐Atom Catalysts
Nicolò Allasia,
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Shuai Xu,
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Sadaf Fatima Jafri
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et al.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 9, 2025
Abstract
Single‐atom
catalysts
(SACs)
are
gathering
significant
attention
in
chemistry
due
to
their
unique
properties,
offering
uniform
active
site
distribution
and
enhanced
selectivity.
However,
precise
structure
often
remains
unclear,
with
multiple
models
proposed
the
literature.
Understanding
coordination
environment
of
at
atomic
level
is
crucial
for
explaining
catalytic
activity.
Here,
a
comprehensive
study
SACs
made
carbon
nitride
(CN
x
)
containing
isolated
nickel
atoms
presented.
Using
combination
synthesis
techniques
characterization
methods
including
Fourier‐transform
infrared
spectroscopy,
X‐ray
absorption
spectroscopy
(XAS),
density
functional
theory
(DFT)
calculations,
local
centers
CN
‐supported
investigated.
These
results
challenge
conventional
structural
propose
new
architecture
that
better
aligns
current
experimental
evidence.
This
serves
as
foundational
step
toward
rational
approach
catalyst
development
can
facilitate
more
design
application
these
innovative
catalysts.
Language: Английский
Modification engineering over single-atom catalysts for efficient heterogeneous photocatalysis
Hongda Liu,
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Weiping Xiong,
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Chengyun Zhou
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et al.
Coordination Chemistry Reviews,
Journal Year:
2025,
Volume and Issue:
529, P. 216468 - 216468
Published: Jan. 21, 2025
Language: Английский
Enhanced Three-Component Chloro-/Azido-Fluoroalkylation of Unactivated Alkenes via the Proximity Effect in a Heterogenous Metallaphotocatalyst
Xiaolin Shi,
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Maolin Li,
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Yuanjun Zhao
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et al.
ACS Catalysis,
Journal Year:
2025,
Volume and Issue:
15(3), P. 2180 - 2191
Published: Jan. 22, 2025
Heterogeneous
metallaphotocatalytic
chemical
transformations
employing
a
recyclable
catalyst
are
highly
desirable
for
organic
synthesis.
However,
the
rational
design
and
controlled
preparation
of
well-defined,
site-isolated
metal/photo
bifunctional
heterogeneous
catalysts
to
achieve
this
goal
remain
significant
challenge.
In
study,
we
demonstrate
covalent
attachment
homogeneous
molecular
MnSalen
complex
(where
Salen
=
N,N′-bis(salicylidene)ethylenediamine)
onto
surface
graphitic
carbon
nitride
(CN)
via
an
amide
bond
visible-light-driven
chloro-
azido-fluoroalkylation
unactivated
alkenes.
The
linkage
between
CN
not
only
facilitates
electron
delocalization
enhances
light-harvesting
capabilities
photosensitizer
but
also
exerts
proximity
effect
that
markedly
ability
Mn
sites
capture
alkyl
radical
intermediates
during
reaction
process.
A
diverse
set
alkenes
could
be
efficiently
azido-fluoroalkylated
their
corresponding
difunctionalized
products
in
moderate
high
yields
with
good
functional
group
compatibility.
Furthermore,
practicability
protocol
is
illustrated
through
late-stage
diversification
various
bioactive
compounds
pharmaceuticals.
Notably,
integrated
photocatalyst
demonstrates
stability
can
recycled
at
least
10
times
without
loss
activity
selectivity.
Language: Английский
Tunable Electrochemical Reactive Carbon Dioxide Capture and Conversion to Produce Syngas Using Highly Dispersed Nickel Catalyst
ACS Sustainable Chemistry & Engineering,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 15, 2025
Language: Английский
Challenges and Breakthroughs in Single-Atom Catalysts for Electrocatalytic Nitrate Reduction to Ammonia
ACS Sustainable Chemistry & Engineering,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 2, 2025
Language: Английский
Optimization of Dissolution Parameters for GH4738 Scrap via Response Surface Methodology
Materials,
Journal Year:
2025,
Volume and Issue:
18(4), P. 793 - 793
Published: Feb. 11, 2025
This
study
aimed
to
optimize
the
electrochemical
dissolution
process
of
GH4738
scrap,
a
Ni-based
superalloy,
achieve
high
rate
with
minimal
energy
consumption.
Using
Plackett–Burman
design,
we
identified
four
key
factors
from
pool
eight
candidates
that
significantly
influence
both
and
consumption:
current
density,
NiCl2
concentration,
electrolysis
time,
H2SO4
concentration.
The
steepest
ascent
method
was
then
applied
define
region
minimized
consumption
while
maximizing
rate.
Response
surface
methodology
(RSM)
used
determine
central
point
for
further
analysis,
providing
valuable
insights
optimizing
parameters.
demonstrated
increasing
concentration
reduced
breakdown
potential,
at
an
1.5
mol/L,
efficiency
achieved
interactions
among
parameters
affected
performance.
Analysis
variance
(ANOVA)
confirmed
significant
these
on
behavior
superalloys.
research
contributes
understanding
scrap
provides
systematic
approach
process,
which
is
crucial
efficient
material
recovery
laboratory
sustainability.
Language: Английский