ACS Nano,
Год журнала:
2024,
Номер
18(33), С. 22316 - 22324
Опубликована: Авг. 9, 2024
Structural
evolution
of
solid
catalyst
surfaces
induced
by
direct
exposure
to
reaction
gas
has
been
extensively
studied
and
is
well
understood.
However,
whether
how
subsurface
atomic
structures
are
affected
the
atmosphere
require
further
exploration.
In
this
work,
our
results
confirm
that
Cu
clusters
supported
on
FeO/Pt(111)
(Cun/FeO/Pt)
transform
into
surface
CuCO
complexes
(CuCO/FeO/Pt)
with
CO
at
78
K.
Surprisingly,
Pt(111)
buried
under
monolayer
FeO
film
(FeO/Cun/Pt)
can
also
upon
adsorption
150
The
place
exchange
atoms
be
mediated
exposing
K
keeping
in
ultrahigh
vacuum
300
K,
alternatively.
Calculation
reveal
induces
restructuring
above
clusters,
generating
a
diffusion
channel
for
pass
through
form
CuCO,
while
remaining
FeO–Pt
interface
more
thermodynamically
favored
without
CO.
Our
work
suggests
may
involved
strong
processes
driven
gas,
which
could
strongly
influence
catalytic
performance.
ACS Catalysis,
Год журнала:
2023,
Номер
13(19), С. 12983 - 12993
Опубликована: Сен. 20, 2023
Catalytic
decomposition
of
N2O
into
N2
and
O2
is
one
the
most
important
techniques
for
removing
from
atmosphere
to
curb
global
warming.
Supported
RhOx
catalysts
are
known
show
high
efficiency
decomposition,
even
in
presence
O2,
compared
with
other
materials,
such
as
supported
metal
oxides
Fe-based
zeolite
catalysts.
In
this
study,
addition
Ag
was
found
enhance
an
Al2O3-supported
catalyst
(RhOx/Al2O3)
decomposition.
The
promotional
effect
investigated
using
various
operando
spectroscopic
methods,
including
X-ray
absorption
spectroscopy,
diffuse
reflectance
UV–vis
spectroscopy
(DR
UV–vis),
ambient-pressure
photoelectron
kinetic
studies.
results
demonstrated
that
enhanced
catalytic
by
enhancing
thermal
reduction
Rh
oxide,
which
identified
rate-determining
step,
especially
at
low
temperatures.
Chinese Journal of Chemistry,
Год журнала:
2023,
Номер
42(1), С. 73 - 86
Опубликована: Авг. 24, 2023
Comprehensive
Summary
Ligand‐protected
gold
(Au
n
)
clusters
sometimes
need
the
removal
of
organic
ligands
to
expose
more
active
sites
and
reduce
steric
hindrance
in
catalytic
reactions,
large
amount
inorganic
materials
usually
be
employed
as
supports
anchor
Au
through
different
interaction
mechanisms.
Whereas,
less
comprehensive
summaries
have
been
provided
about
crucial
contribution
various
performance
supported
clusters.
Herein,
this
review
firstly
summarizes
synthesis
methods
(
e.g
.,
impregnation
encapsulation
processes)
for
cluster
catalysts,
then
mainly
points
out
specific
contributions
support
effect
a
great
diversity
well
deep
Besides,
opportunities
challenging
issues
will
stated
towards
clusters,
terms
improving
structural
stability
demand
catalysis.
Noble-metal
single-atom
catalysts
(SACs)
have
arisen
as
a
research
hotspot
in
heterogeneous
catalysis
resulting
from
superior
noble-metal-atom
utilization,
well-defined
catalytic
centers,
and
tunable
microenvironments.
Recently,
the
advent
rise
of
noble-metal
SACs
supported
by
layered
double
hydroxides
(LDHs)
injected
fresh
vitality
vigor
into
this
field.
LDHs
offer
distinct
advantages
support
SACs,
such
an
ordered
adjustable
crystal
structure,
two-dimensional
structure
possessing
large
specific
surface
area,
facile
synthesis
with
cost-effectiveness,
strong
co-catalytic
metal-support
interaction
between
single
atoms.
In
review,
we
classified
comprehensively
outlined
current
strategies
LDHs,
conducted
in-depth
analysis
mechanisms
underlying
each
strategy.
Subsequently,
considering
critical
role
microenvironment
affecting
their
catalytic-related
properties,
discussed
regulation
LDH-supported
SACs.
We
also
provide
introduction
to
characterization
techniques
for
singe-atom
sites
Furthermore,
diverse
applications
various
fields
roles
played
atoms
relevant
processes.
Finally,
delineated
challenges
future
directions
development
