Enhanced Nitrous Oxide Decomposition on Zirconium-Supported Rhodium Catalysts by Iridium Augmentation
Environmental Science & Technology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
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.
Language: Английский
Direct Syngas-To-Ethanol Conversion over Lithium-Promoted Rh/MgO Catalysts
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.
Language: Английский
A review of chemical kinetic mechanisms and after-treatment of amino fuel combustion
The Science of The Total Environment,
Journal Year:
2025,
Volume and Issue:
959, P. 178220 - 178220
Published: Jan. 1, 2025
Language: Английский
Extrapolative-machine-learning-guided discovery of multi-elemental heterogeneous catalysts for low-temperature NO reduction by H2
Yuan Jing,
No information about this author
Chenyang Zhang,
No information about this author
Mine Shinya
No information about this author
et al.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 1, 2025
Abstract
Selective
catalytic
reduction
of
NO
x
with
hydrogen
(H
2-SCR)
in
the
presence
oxygen
is
an
environmentally
friendly
and
sustainable
emission
control
technology
that
has
attracted
considerable
attention.
However,
even
most
promising
currently
available
catalysts
are
not
sufficiently
active
to
effectively
promote
this
reaction,
particularly
at
low
temperatures
(<
150°C).
Therefore,
there
urgent
need
for
development
highly
H
2-SCR
catalysts.
Although
data-science
approaches,
including
machine
learning
(ML),
have
been
suggested
accelerate
such
important
processes,
discovery
unique
using
ML
remains
limited.
This
limitation
stems
from
a
common
criticism
ML,
namely,
its
perceived
inability
extrapolate
identify
extraordinary
materials.
Herein,
we
present
extrapolative
approach
new
multi-elemental
Starting
45
as
initial
dataset,
employed
closed-loop
system
combined
predictions
experimental
validation
over
24
iterative
cycles.
process
enabled
testing
425
catalysts,
ultimate
identification
several
superior
activity
(average
N₂
yield,
%)
previously
reported
high-performance
temperature
range
50–150°C.
The
optimal
catalyst
was
found
be
Pt(1.3)-Ir(0.2)/Ba(1.5)-Co(1)/H-ZSM-5(11).
Notably,
Co
absent
original
composition
could
predicted
by
human
experts.
Language: Английский
Identification of active sites and mechanism of CO2 methanation over Ni/CeO2 catalysts
Journal of Rare Earths,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 1, 2025
Language: Английский
Reductive decomposition of nitrous oxide with hydrogen at room temperature over iridium nanoparticles highly dispersed on silica
Kana Sato,
No information about this author
Sora Momma,
No information about this author
Young‐Wook Song
No information about this author
et al.
Journal of environmental chemical engineering,
Journal Year:
2025,
Volume and Issue:
13(3), P. 116922 - 116922
Published: May 5, 2025
Language: Английский
Effect of thermal and hydrothermal aging treatments on Fe-Based Zeolite Catalysts for N2O decomposition in Ammonia-Fueled Engines
Anqi Li,
No information about this author
Pan Wang,
No information about this author
Tong Yan
No information about this author
et al.
Aerospace Science and Technology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 110394 - 110394
Published: June 1, 2025
Language: Английский
Continuous N2O Capture and Reduction to N2 Using Ca-Zeolite Adsorbent and Pd/La/Al2O3 Reduction Catalyst
Yuan Jing,
No information about this author
Chenxi He,
No information about this author
Wan Li
No information about this author
et al.
ACS ES&T Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 19, 2024
Language: Английский
A Review on Preparation of Palladium Oxide Films
Coatings,
Journal Year:
2024,
Volume and Issue:
14(10), P. 1260 - 1260
Published: Oct. 1, 2024
Fabrication
aspects
of
PdO
thin
films
and
coatings
are
reviewed
here.
The
work
provides
organizes
the
up-to-date
information
on
methods
to
obtain
films.
In
recent
years,
interest
in
Pd
oxide
for
different
applications
has
increased.
Since
can
be
converted
into
PdO,
it
is
instructive
pay
attention
preparation
pure
alloyed
films,
heterostructures,
nanoparticles
synthesized
substrates.
development
presented
from
early
reports
coatings’
formation
by
oxidation
foils
wires
present
technologies.
Modern
synthesis/growth
routes
gathered
chemical
physical
categories.
Chemical
include
hydrothermal,
electrochemical,
electroless
deposition,
coating
methods,
such
as
impregnation,
precipitation,
screen
printing,
ink
jet
spin
or
dip
coating,
vapor
deposition
(CVD),
atomic
layer
(ALD),
while
ones
sputtering
cathodic
arc
laser
ablation,
ion
electron
beam-induced
evaporation,
supersonic
cluster
beam
deposition.
Analysis
publications
indicates
that
many
as-deposited
Pd-oxide
granular,
with
a
high
variety
morphologies
properties
targeting
very
applications,
they
grown
We
note
comparative
assessment
challenges
quality
among
specific
application
generally
missing
and,
some
cases,
difficult
make
distinction
between
film
randomly
oriented,
powder-like
(granular),
compact
material.
Textured
epitaxial
rare
if
orientation
observed,
most
obtained
accidentally.
Some
practical
details
toward
issues
concerning
also
presented.
Language: Английский