Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 6, 2025
Noble
metal
single
atoms
(NMSA)
offer
exceptional
atom
utilization
and
catalytic
activity
but
face
challenges
like
limited
stability,
low
atomic
loading,
complex
synthesis.
This
study
presents
an
innovative
entropy-driven
strategy
to
stabilize
Ru
(SA)
on
a
(CePrYZrHf)Ox
high-entropy
oxide
substrate
(Ruα%-HEO).
Due
their
defect-rich
structure
significant
lattice
distortion,
HEO
substrates
can
accommodate
more
SA
than
traditional
low-entropy
oxides
(LEO)
CeO2.
is
also
effective
for
achieving
high
loadings
of
other
NMSAs,
such
as
Pd
Pt.
Ru3%-HEO,
electrocatalyst
nitrate
reduction,
achieves
ammonia
yield
(5.79
mg
h-1
mgcat.
-1)
Faradaic
efficiency
(FE)
91.3%.
Density
functional
theory
(DFT)
calculations
reveal
that
Ru3%-HEO
exhibits
favorable
thermodynamics
with
lower
energy
barrier
the
rate-determining
step
first
hydrogenation
(*NO
+
H+
e⁻
→
*NOH)
stronger
intermediates
adsorption
compared
RuO2,
enhancing
its
efficiency.
As
cathode
material
in
zinc-nitrate
battery,
demonstrates
NH3
rate
(1.11
cm-2)
FE
value
(93.4%).
provides
efficient
produce
stable
high-loading
using
materials,
showcasing
broad
applicability
advanced
electrocatalysis.
Nanoscale,
Год журнала:
2024,
Номер
16(29), С. 13895 - 13904
Опубликована: Янв. 1, 2024
CP/CuO
x
with
suitable
copper
valence
states
obtained
by
fine-tuning
the
conductivity
of
electrochemical
reconstruction
may
provide
a
competitive
cathode
catalyst
for
achieving
excellent
activity
and
selectivity
NO
3
−
-to-NH
conversion.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 2, 2024
Abstract
Electrocatalytic
N
2
reduction
reaction
(eNRR)
has
been
deemed
as
an
alternative
approach
to
the
Haber‐Bosch
(H‐B)
process
for
ammonia
(NH
3
)
production,
but
it
remains
a
huge
challenge.
Here
jet
plasma
oxidation
of
is
reported
in
air
into
NO
x
and
subsequently
−
coupling
with
electrochemical
(pN
─eNO
RR)
over
PdNi
alloying
nanoparticles
on
N‐doped
carbon
nanotubes
(PdNi/N‐CNTs)
NH
synthesis.
The
results
demonstrate
that
reactor
possesses
excellent
gas
reforming
capacity
achieve
largest
yield
rate
30.46
mmol
h
−1
low
energy
consumption
2.66
kWh
mol
.
For
subsequent
eNO
RR,
PdNi/N‐CNTs
can
afford
34.96
mg
cat.
faradaic
efficiency
(FE)
98.21%
at
−0.38
0.02
V
(vs
RHE),
respectively.
In
situ
spectroscopic
characterizations
combined
theoretical
calculations
unveil
provide
Pd
Ni
dual
active
sites,
enabling
activation
site
H
*
provision
facilitate
RR.
A
cascade
pN
‐eNO
RR
system
constructed
sustainable
achieving
stable
25.56
,
average
FE
>85%,
well
conversion
44.62%
constant
ampere‐level
current
finally
collection
gram‐level
4
SO
product.
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 6, 2025
Improving
the
reduction
efficiency
and
N2
selectivity
is
important
for
nitrate
decontamination.
A
novel
ternary
ball-milled
Al-Cu-AC
material
reported
to
achieve
a
highly
selective
of
N2.
The
process,
driven
by
continuous
dissolution
zero-valent
aluminum
(ZVAl),
demonstrated
stepwise
scheme.
interesting
shift
in
electron-donating
pathways
was
ascribed
spontaneous
change
microenvironmental
pH
from
neutral
alkaline.
(1:1:5
mass
ratio)
completely
removed
30
mg/L
NO3--N
over
wide
range
(5-9),
achieving
83%
TN
removal
N2-selectivity,
without
detectable
copper
leaching.
atomic
hydrogen
(H*)-mediated
occurring
on
Cu
component
proven
be
crucial
fast
transformation
NO3-
NO2-,
while
non-H*
process
dominated
electrochemical
NO2-
AC
cathode
Al
||
microgalvanic
cells
formed
material.
primary
route
identified
as
*NOH
pathway,
superiority
toward
verified
with
actual
wastewater.
This
study
revealed
how
influenced
ZVAl
provides
new
approach
maximize
performance
metals.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 9, 2025
Abstract
Electrochemical
nitrate
reduction
to
ammonia
(eNO
3
RR)
in
neutral
conditions
is
an
effective
and
sustainable
method
for
production
while
treating
pollution.
Nevertheless,
it
still
faces
a
great
challenge
due
the
complicated
multiple
proton‐coupled‐electron
process
eNO
RR.
Herein,
efficient
heterostructure
electrocatalyst
Cu‐Cu
2
O/Ni
P
has
been
successfully
fabricated
electrosynthesis
from
reduction.
exhibits
outstanding
RR
performance
with
Faradaic
efficiency
(FE)
as
high
96.4%
yield
rate
of
14636
µg·h
−1
·cm
−2
at
−1.0
V
(vs
RHE)
0.1
m
PBS
solution,
which
outperforms
most
reported
electrocatalysts
media.
More
importantly,
catalyst
demonstrates
exceptional
stability
30
consecutive
electrolysis
cycles
durability
even
large
current
density
440
mA
cm
flow
cell.
The
tandem
catalysis
mechanism
NO
−
→
NH
by
synergism
two
components
O
Ni
verified
experimental
theoretical
calculations.
strong
adsorption
capacity
can
be
reduced
into
,
facilitate
water
splitting,
promotes
abundant
*H
production,
thus
boosting
subsequent
hydrogenation
during
whilst
inhibiting
competitive
hydrogen
evolution
reaction
(HER).
Electrochemical
nitrate
reduction
reaction
(NO3RR)
offers
a
promising
alternative
for
ammonia
production
using
electricity
generated
from
renewable
energy
sources.
Active
electrocatalysts
with
high
selectivity
and
yield
are
required
to
selectively
catalyze
NO3RR
ammonia.
Here,
P-doped
Cu0.51Ni0.49
alloy
thin
films
electrodeposited
deep
eutectic
solvent
of
choline
chloride-ethylene
glycol
(ChCl/EG).
The
P-Cu0.51Ni0.49
produces
1616.94
µg
h-1
cm-2
at
-0.55
VRHE
(V
versus
reversible
hydrogen
electrode),
Faradaic
efficiency
98.38%
97.84%
-0.25
VRHE,
much
better
than
the
P-Ni
P-Cu
prepared
under
similar
condition.
rate,
originated
number
electrochemically
active
sites
more
facile
kinetics.
Mechanistic
study
density
functional
theory
calculation
proves
that
exhibits
higher
conductivity
NO3
-
adsorption
compared
P-Cu,
induced
by
electron
interaction.
Characterizations
after
cycling
show
crystallinity
decreases,
content
divalent
metal
ions
increases
surface.
is
an
stable
material
electrocatalyze
in
neutral
aqueous
solutions.
