ACS ES&T Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 30, 2024
Hydroxyl
groups
(−OH)
were
loaded
on
the
surface
of
Co3O4
through
hydrothermal
treatment,
which
enhanced
electron
transfer
process
at
gas–solid
interface
and
N2O
decomposition
performance.
Hydrothermal
treatment
does
not
substantially
alter
crystal
structure
or
oxygen
vacancy
content
catalyst,
while
it
slightly
suppresses
BET
area
reducibility.
These
factors
do
primarily
contribute
to
activity
Co3O4.
The
−OH
peaks
8
h
correlating
with
highest
catalytic
activity.
Electronic
analysis
reveals
that
raise
d-band
center
narrow
band
gap,
thereby
facilitating
adsorption
transfer.
DFT
simulations
support
these
findings,
indicating
enhance
from
Co
N2O,
promoting
N–O
bond
cleavage
lowering
activation
barrier.
This
work
provides
an
in-depth
exploration
mechanism
by
hydroxyl
facilitate
processes,
offering
fundamental
insights
into
science
providing
guidance
for
new
catalyst
design.
Analytical Chemistry,
Journal Year:
2024,
Volume and Issue:
96(10), P. 4299 - 4307
Published: Feb. 28, 2024
To
boost
the
enzyme-like
activity,
biological
compatibility,
and
antiaggregation
effect
of
noble-metal-based
nanozymes,
folic-acid-strengthened
Ag–Ir
quantum
dots
(FA@Ag–Ir
QDs)
were
developed.
Not
only
did
FA@Ag–Ir
QDs
exhibit
excellent
synergistic-enhancement
peroxidase-like
high
stability,
low
toxicity,
but
they
could
also
promote
lateral
root
propagation
Arabidopsis
thaliana.
Especially,
ultratrace
cysteine
or
Hg2+
exclusively
strengthen
deteriorate
inherent
fluorescence
property
with
an
obvious
"turn-on"
"turn-off"
effect,
dopamine
alter
activity
a
clear
hypochromic
from
blue
to
colorless.
Under
optimized
conditions,
successfully
applied
for
turn-on
imaging
stress
response
in
cells
plant
roots,
turn-off
monitoring
toxic
Hg2+,
visual
detection
aqueous,
beverage,
serum,
medical
samples
limits
satisfactory
recoveries.
The
selective
recognition
mechanisms
toward
cysteine,
illustrated.
This
work
will
offer
insights
into
constructing
some
efficient
nanozyme
sensors
multichannel
environmental
analyses,
especially
prediagnosis
cysteine-related
diseases
responses
organisms.
The
effective
elimination
of
N2O
from
automobile
exhaust
at
low
temperatures
poses
significant
challenges.
Compared
to
other
materials,
supported
RhOx
catalysts
exhibit
high
decomposition
activities,
even
in
the
presence
O2,
CO2,
and
H2O.
Metal
additives
can
enhance
low-temperature
activities
over
catalysts;
however,
enhancement
mechanism
active
sites
require
further
investigation.
In
this
study,
we
demonstrate
activity
a
monoclinic
ZrO2-supported
Rh
catalyst
[Rh(1)/ZrO2]
with
Ir
addition
+
O2
CO2
promotional
effect
on
Rh(1)–Ir(1)/ZrO2
(Rh
=
1
wt
%
%)
were
investigated
by
kinetic
studies
situ
spectroscopic
methods,
including
X-ray
absorption
spectroscopy,
ambient-pressure
photoelectron
ultraviolet–visible
spectroscopy.
These
results
indicate
that
both
surface
species
for
catalytic
temperatures,
augmentation
promoted
desorption
gaseous
which
are
regarded
as
key
steps
decomposition.
ACS Catalysis,
Journal Year:
2025,
Volume and Issue:
15(3), P. 2033 - 2044
Published: Jan. 21, 2025
Significant
efforts
have
been
dedicated
to
the
direct
syngas
conversion
into
ethanol,
however,
achieving
a
high
ethanol
yield
remains
formidable
task.
In
this
study,
we
present
syngas-to-ethanol
over
Li-promoted
RhOx/MgO
catalyst
(RhOx/Li2O/MgO).
The
space-time
(EtOH
STY)
and
selectivity
reached
12.2
mmol
gcat–1
h–1
20%,
respectively,
at
35%
CO
RhOx/Li2O/MgO
catalyst.
demonstrated
superior
performance
in
terms
of
both
STY
compared
Rh/Li2O
catalysts
on
other
support
materials
Rh/MgO
promoted
with
alkali
metals.
situ/operando
spectroscopic
techniques,
combined
characterisations
theoretical
calculations,
elucidated
interactions
between
Li2O
Rh
MgO
surface.
These
promote
formation
new
active
sites
weaken
adsorption
surface,
thereby
enhancing
production.
This
work
provides
promising
strategy
for
improving
processes.
Smart Molecules,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 29, 2024
Abstract
The
widespread
use
of
diesel
engines
results
in
significant
environmental
contamination
due
to
emitted
pollutants,
particularly
soot
particles.
These
pollutants
are
detrimental
public
health.
At
present,
one
the
most
effective
ways
remove
particles
is
catalytic
particulate
filter
after‐treatment
technology,
which
requires
catalyst
have
superior
low
temperature
activity.
Compared
with
cerium
oxide
widely
used,
cobalt
transition
metal
oxides
has
been
studied
recent
years
because
its
high
redox
ability
and
easy
control
morphology.
This
paper
elaborates
on
influence
modification
techniques
such
as
doping,
loading,
solid
solution
performance
cobalt‐based
catalysts
oxidation.
Along
same
lines,
it
further
reviews
research
progress
specific
dimensional
structures
morphologies
Finally,
provides
an
outlook
challenges
faced
by
theoretical
basis
applied
