Small,
Journal Year:
2020,
Volume and Issue:
17(9)
Published: May 13, 2020
Abstract
Heterogeneous
hydrogenation
reactions
are
of
great
importance
for
chemical
upgrading
and
synthesis,
but
still
face
the
challenges
controlling
selectivity
long‐term
stability.
To
improve
catalytic
performance,
many
utilize
special
yolk/core–shell
nanoreactors
(YCSNs)
with
unique
architectures
advantageous
properties.
This
work
presents
developmental
technological
in
preparation
YCSNs
that
potentially
useful
reactions,
provides
a
summary
properties
these
materials.
The
also
addresses
scientific
applications
various
gas
liquid‐phase
reactions.
catalyst
structures,
structure–performance
relationships,
reaction
mechanisms,
unsolved
problems
discussed
too.
Also,
brief
outlook
opportunities
future
research
this
field
presented.
on
advancements
might
inspire
creation
new
materials
desired
structures
achieving
maximal
performances.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(47)
Published: Sept. 27, 2022
The
exposed
facets
of
supported
catalysts
play
a
crucial
role
in
catalysis;
however,
they
are
usually
ignored
and
related
studies
remain
rare.
Herein,
we
have
fabricated
series
sandwich-structured
metal-organic
framework
composites,
denoted
ZIF-8X
@Pd@ZIF-8
(x
represents
the
morphology
ZIF-8
core,
i.e.,
ZIF-8C
exposing
(100)
facet,
ZIF-8RD
(110)
ZIF-8TRD
mixed
facets),
featuring
Pd
nanoparticles
deposited
on
specific
crystal
for
hydrogenation
p-chloronitrobenzene.
electronic
state
is
tailored
by
where
more
electron-deficient
found
than
that
@Pd@ZIF-8,
leading
to
discriminative
adsorption
-NO2
-Cl
groups
Consequently,
exhibits
excellent
activity
(97.6
%)
selectivity
(98.1
p-chloroaniline.
This
work
highlights
facet
engineering
supports
modulate
microenvironment
metal
nanoparticles,
offering
promising
avenue
enhanced
catalysis.
Carbon Energy,
Journal Year:
2023,
Volume and Issue:
6(3)
Published: May 25, 2023
Abstract
The
increase
in
anthropogenic
carbon
dioxide
(CO
2
)
emissions
has
exacerbated
the
deterioration
of
global
environment,
which
should
be
controlled
to
achieve
neutrality.
Central
core
goal
achieving
neutrality
is
utilization
CO
under
economic
and
sustainable
conditions.
Recently,
strong
need
for
led
a
proliferation
studies
on
direct
conversion
into
carboxylic
acids,
can
effectively
alleviate
create
high‐value
chemicals.
purpose
this
review
present
application
prospects
acids
basic
principles
through
photo‐,
electric‐,
thermal
catalysis.
Special
attention
focused
regulation
strategy
activity
abundant
catalysts
at
molecular
level,
inspiring
preparation
high‐performance
catalysts.
In
addition,
theoretical
calculations,
advanced
technologies,
numerous
typical
examples
are
introduced
elaborate
corresponding
process
influencing
factors
catalytic
activity.
Finally,
challenges
provided
future
development
field.
It
hoped
that
will
contribute
deeper
understanding
inspire
more
innovative
breakthroughs.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(39)
Published: July 8, 2023
While
the
microenvironment
around
catalytic
sites
is
recognized
to
be
crucial
in
thermocatalysis,
its
roles
photocatalysis
remain
subtle.
In
this
work,
a
series
of
sandwich-structured
metal-organic
framework
(MOF)
composites,
UiO-66-NH2
@Pt@UiO-66-X
(X
means
functional
groups),
rationally
constructed
for
visible-light
photocatalytic
H2
production.
By
varying
─X
groups
UiO-66-X
shell,
Pt
and
photosensitive
core
can
simultaneously
modulated.
Significantly,
MOF
composites
with
identical
light
absorption
loading
present
distinctly
different
production
rates,
following
group
sequence
─H
>
─Br
─NA
(naphthalene)
─OCH3
─Cl
─NO2
.
@Pt@UiO-66-H
demonstrates
rate
up
2708.2
µmol
g-1
h-1
,
≈222
times
that
@Pt@UiO-66-NO2
Mechanism
investigations
suggest
variation
balance
charge
separation
proton
reduction
ability
Pt,
leading
an
optimal
activity
at
equilibrium
point.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(17)
Published: Feb. 26, 2024
Atomically
precise
metal
nanoclusters
(NCs)
with
unique
optical
properties
and
abundant
catalytic
sites
are
promising
in
photocatalysis.
However,
their
light-induced
instability
the
difficulty
of
utilizing
photogenerated
carriers
for
photocatalysis
pose
significant
challenges.
Here,
MAg
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(17), P. 11773 - 11781
Published: April 22, 2024
Natural
enzymes
intricately
regulate
substrate
accessibility
through
specific
amino
acid
sequences
and
folded
structures
at
their
active
sites.
Achieving
such
precise
control
over
the
microenvironment
has
proven
to
be
challenging
in
nanocatalysis,
especially
realm
of
ligand-stabilized
metal
nanoparticles.
Here,
we
use
atomically
nanoclusters
(NCs)
as
model
catalysts
demonstrate
an
effective
ligand
engineering
strategy
local
concentration
CO2
on
surface
gold
(Au)
NCs
during
electrocatalytic
reduction
reactions
(CO2RR).
The
incorporation
two
2-thiouracil-5-carboxylic
(TCA)
ligands
within
pocket-like
cavity
[Au25(pMBA)18]−
(pMBA
=
para-mercaptobenzoic
acid)
leads
a
substantial
acceleration
reaction
kinetics
CO2RR.
This
enhancement
is
attributed
more
favorable
proximity
site
for
CO2,
facilitated
by
supramolecular
interactions
between
nucleophilic
Nδ−
pyrimidine
ring
TCA
electrophilic
Cδ+
CO2.
A
comprehensive
investigation
employing
absorption
spectroscopy,
mass
spectrometry,
isotopic
labeling
measurements,
electrochemical
analyses,
quantum
chemical
computation
highlights
pivotal
role
enrichment
enhancing
activity
selectivity
TCA-modified
Au25
Notably,
high
Faradaic
efficiency
98.6%
toward
CO
been
achieved.
approach
catalytic
fundamentals
elucidated
this
study
provide
systematic
foundation
molecular-level
design
metal-based
electrocatalysts.
Polyoxometalates,
Journal Year:
2024,
Volume and Issue:
3(3), P. 9140057 - 9140057
Published: Jan. 25, 2024
As
a
result
of
the
powerful
quantum
confined
space
effects
and
multiple
modes
very
tiny
atomic
sizes,
metal
nanoclusters
(NCs)
that
consist
thiolate-protected
noble
metals,
such
as
silver
(Ag)
gold
(Au)
have
core
sizes
less
than
3
nm,
emerged
class
"metallic
molecules"
with
wide
range
molecule-like
optical,
magnetic,
electronic
properties.
To
investigate
well-defined
nanocatalysts,
especially
ligand-passivated
nanoclusters,
great
strides
been
achieved
in
efficient
synthesis
atomically
precise
nanoparticles.
Methods
bottom-up
growth,
top-down
approach,
ligand
engineering,
interconversion
system
are
covered
this
overview.
Such
clearly
defined
demonstrated
considerable
promise
catalysis
research
evolved
into
distinct
model
catalysts.
Focusing
on
oxygen
reduction
reaction
(ORR),
hydrogen
evolution
(HER),
(OER),
article
attempts
to
outline
current
developments
molecular
employed
electrocatalytic
reactions.
The
paper
also
highlights
connection
between
catalytic
mechanism's
structure
performance
well
examines
potential
clusters'
structures,
charges,
ligands,
metal-ligand
binding
patterns
their
activity.
Future
opportunities
challenges
proposed.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(13), P. 9026 - 9035
Published: March 5, 2024
The
introduction
of
single
or
multiple
heterometal
atoms
into
metal
nanoparticles
is
a
well-known
strategy
for
altering
their
structures
(compositions)
and
properties.
However,
surface
nonmetal
atom
doping
challenging
rarely
reported.
For
the
first
time,
we
have
developed
synthetic
methods,
realizing
"surgery"-like,
successive
doping,
replacement,
addition
ultrasmall
(metal
nanoclusters,
NCs),
successfully
synthesized
characterized
three
novel
bcc
NCs
Au38I(S-Adm)19,
Au38S(S-Adm)20,
Au38IS(S-Adm)19
(S-Adm:
1-adamantanethiolate).
influences
replacement
on
NC
structure
optical
properties
(including
absorption
photoluminescence)
were
carefully
investigated,
providing
insights
(composition)–property
correlation.
Furthermore,
bottom-up
method
was
employed
to
construct
metal–organic
framework
(MOF)
surface,
which
did
not
essentially
alter
but
led
partial
release
ligands
stimulated
activity
catalyzing
p-nitrophenol
reduction.
MOF
construction
enhanced
stability
water
solubility,
another
dimension
tunning
catalytic
by
modifying
functional
groups.
