C3H6–SCR
denitrification
technology
faces
catalyst
deactivation
problems
and
low
catalytic
performance
at
medium-low
temperatures.
This
study
utilized
the
intermetallic
synergies
to
prepare
atomic
cluster
catalysts
(FeNiCu/NC)
by
anchoring
Fe–Ni–Cu
on
a
carbon
matrix
enhance
The
synergistic
effect
of
is
reflected
in
differences
physicochemical
properties
catalysts,
which
proved
several
characterization
techniques.
Results
showed
that
FeNiCu/NC
had
larger
surface
area
(541.4
m2/g)
there
were
no
metal
oxides
but
abundant
defective
sites
anchored
Fe/Ni/Cu
atoms
through
N
form
M–Nx
active
clusters.
hollow
morphology
provides
sufficient
for
C3H6–SCR.
coordination
environments
M–Nx–C,
Fe2/FeCu2/FeNi2,
Ni3/NiFe/NiCu2,
Cu4/CuFe2/CuNi2,
where
action
trimetal
leads
presence
Fe–Ni–Cu–Nx–C.
significantly
improved
exhibited
an
81%
NO
conversion
150
°C
under
2%
O2,
15%
20%
higher
than
FeNi/NC
FeCu/NC
respectively.
Even
4%
was
remove
78%
achieve
93%
N2
selectivity
maintained
100%
300–425
°C.
DRIFTS
results
demonstrated
C3H6
could
combine
with
O
cluster,
M–Nx,
or
oxygen
produce
various
intermediate
species,
wherein
acetates
nitrates
main
intermediates.
Based
results,
reaction
pathway
over
proposed.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(35), P. 16541 - 16553
Published: Aug. 21, 2024
Electrocatalytic
conversion
of
5-hydroxymethylfurfural
(HMF)
to
2,5-furandicarboxylic
acid
(FDCA)
is
significant
for
the
sustainable
production
value-added
chemicals.
Active
sites
catalysts
could
enhance
activity
and
selectivity
HMF
oxidation
reaction
(HMFOR),
but
self-healing
ability
active
has
been
commonly
ignored.
In
this
work,
Co(OH)2/Ni-MOF
was
successfully
fabricated
efficient
FDCA
under
mild
conditions.
Electrochemical
cyclic
stability
experiments
demonstrated
high
properties
dual
(Co3+/Ni3+).
So,
retention
rate
yield
can
still
reach
98.5%,
even
after
90
days.
HMFOR
further
coupled
with
4-nitrophenol
hydrogenation,
which
promotes
Faradaic
efficiency
about
100%.
Therefore,
study
explores
species
provides
new
insights
designing
catalysts.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(10), P. 8960 - 8967
Published: May 8, 2024
Nitrogen
oxides
(NOX)
emitted
from
marine
diesel
engines
have
appealed
for
efficient
catalysts
with
a
wide
operation
window
selective
catalytic
reduction
of
NOX
by
NH3
(NH3-SCR).
However,
challenges
in
the
balance
between
redox
sites
and
proper
acidic
on
surface
restricted
development
wide-temperature
range
NH3-SCR
catalysts.
Herein,
we
reported
facile
method
to
manipulate
ability
MnOx
improve
low-temperature
SCR
activity.
The
modified
(MnOx-350-air
+
NH3)
exhibited
above
80%
NO
conversion
100%
selectivity
N2
temperature
150
500
°C
(NO
=
1000
ppm,
O2
7%,
GHSV
7200
h–1)
showed
higher
water
resistance
than
counterpart
precursor
catalyst.
XPS
H2-TPR
results
revealed
that
capability
was
improved
significantly
changing
ratio
Mn4+/Mnn
Oα/(Oα+Oβ),
resulting
promotion
adsorption
oxidation
facilitate
"fast
SCR".
NH3-TPD
preparation
could
controllably
adjust
without
affecting
amount
B
acid
their
surface.
This
work
might
provide
insight
into
deliberate
design
operating
controlling
NOx.
Applied Catalysis O Open,
Journal Year:
2024,
Volume and Issue:
194, P. 206982 - 206982
Published: July 17, 2024
Fern
and
willow
(W)
impregnated
with
heavy
metals
(Ni/Fe)
were
pyrolyzed
(800
°C,
N2)
to
produce
metal-loaded
biocarbon
catalyze
NO
decomposition
(deNOx).
The
effects
of
reaction
temperature
(200,
350
500
°C),
biomass
type
on
deNOx
performance
investigated.
WFe
WNi
achieved
the
highest
at
200
°C
(16.5%)
(30.6%)
respectively.
composition
structure
crucial
for
adsorption
metal
dispersion,
which
induced
higher
CO2
(TPO),
high
specific
surface
area
(419.1
m2/g
WNi),
highly
dispersed
small
Ni
particles
(SEM).
main
routes
evidenced
by
on-line
monitoring
direct
into
N2
O2,
reduction
N2,
CO
sites.
Dispersed
catalytic
metals,
as
well
reactivity
functional
groups,
reflect
cost-effective
eco-friendly
potential
catalysts.
