Abstract
Catalytic
active
sites
consisting
in
isolated
metal
single
atoms
can
be
found
enzymatic,
homogenous
and
heterogeneous
catalysts.
In
catalysis,
single‐atom
catalysts
(SACs)
may
offer
high
reactivity
selectivity
towards
some
reactions
provided
their
local
coordination
environment
electronic
properties
are
correctly
tuned.
These
generally
possess
specific
compared
to
nanoparticles
or
clusters.
Because
of
the
difficulty,
inherent
supported
preparing
having
a
homogeneity
sites,
these
two
species
have
had
coexist
many
If
current
trend
is
often
limited
comparing
types
species,
we
will
see
this
mini‐review
that
for
few
years,
work
has
highlighted
possible
synergy
between
improve
catalytic
performance.
The
different
synergies
discussed,
as
well
challenges
opportunities
such
thermal‐,
electro‐
photo‐catalysis.
ACS Catalysis,
Год журнала:
2024,
Номер
14(7), С. 5198 - 5226
Опубликована: Март 21, 2024
Among
all
renewable
energy
sources
(e.g.,
solar
energy,
wind,
and
biomass),
biomass
is
the
only
organic
carbon
resource
which
has
great
potential
to
partly
replace
nonrenewable
fossil
resources
produce
high
value-added
chemicals
biofuels.
Single-atom
catalysts
(SACs)
have
shown
compelling
prospects
arguably
become
one
of
most
active
research
fields
in
chemical
catalysis
due
their
fascinating
strengths
maximum
atomic
utilization,
highly
efficient
catalytic
reactivity,
selectivity,
good
stability.
Numerous
achievements
about
SACs
recently
been
amassed,
including
advanced
synthesis
methods,
characterization
techniques,
theoretical
calculation,
allowing
us
forecast
working
mechanisms
roles
metals
coordination
sites
process.
Based
on
relevant
literatures
over
past
few
years,
this
review
summarizes
preparation
methods
applications
for
conversions
with
a
special
focus
structure–activity
relationship
reaction
mechanism
as
well
future
developments
SACs.
This
provides
fundamental
information
development
valorization,
clearly
stimulating
emerging
field.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(6), С. 5899 - 5911
Опубликована: Март 5, 2024
This
study
showed
the
dual
role
of
Nb
(dopant
and
active
site)
in
improving
structure–activity
properties
shape-controlled
CeO2
nanorods
for
selective
synthesis
functional
imines
benzimidazoles
via
oxidative
coupling
benzyl
alcohols
with
anilines
o-phenylenediamines,
respectively.
The
powder
X-ray
diffraction
(XRD)
studies
lattice
contraction
fluorite
ceria
due
to
replacement
larger
Ce4+
(0.97
Å)
by
smaller
Nb5+
(0.74
lattice,
providing
more
defects
(Ce3+
oxygen
vacancies),
as
elucidated
XPS
studies.
dispersion
Nb2O5
on
surface
Nb-doped
provided
strong
acid
sites,
confirmed
pyridine-adsorbed
Fourier
transform
infrared
(FT-IR)
study.
combined
effect
vacancies
sites
could
promote
activation
molecular
alcohol,
respectively,
achieving
∼97–99%
yields
imine
benzimidazole
liquid-phase
C–N
reactions
over
Nb-CeO2
nanorod
catalyst
calcined
at
400
°C
(NbCeNR4).
versatile
catalytic
efficiency
NbCeNR4
nanomaterial
is
showcased
synthesizing
various
good
excellent
yields.
nanocatalyst
stable
during
reaction
revealed
hot
filtration
test
reusability
4
cycles.
