Advanced Sustainable Systems,
Год журнала:
2024,
Номер
8(12)
Опубликована: Авг. 25, 2024
Abstract
The
high
stability
and
persistence
of
nitrates
in
water
poses
a
serious
threat
to
human
health
ecosystems.
To
effectively
reduce
the
nitrate
content
wastewater,
electrochemical
reduction
reaction
(e‐NO
3
RR)
is
widely
recognized
as
an
ideal
treatment
method
due
its
reliability
efficiency.
selection
catalyst
material
plays
decisive
role
e‐NO
RR
performance.
Copper‐based
catalysts,
with
their
ease
acquisition,
activity,
selectivity
for
NH
,
have
emerged
most
promising
candidates
applications.
In
this
paper,
mechanism
first
introduced.
Then
relationship
between
structural
properties
catalytic
performance
copper‐based
catalysts
analyzed
detail
from
four
aspects:
nanomaterials,
oxides,
monoatomic,
bimetallic
materials.
Strategies
constructing
efficient
are
discussed,
including
surface
modulation,
defect
engineering,
heteroatom
doping,
coordination
effects.
Finally,
challenges
prospects
practical
applications
outlined.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(46)
Опубликована: Авг. 26, 2024
Abstract
The
electrochemical
nitrate
reduction
reaction
(NO
3
−
RR)
presents
an
environmentally
friendly
approach
for
efficient
NO
pollutant
removal
and
ammonia
(NH
)
production,
compared
to
the
conventional
Haber–Bosch
approach.
While
core/shell
engineering
has
demonstrated
its
potential
in
enhancing
RR
performance,
significant
synthetic
challenges
limited
shell
layer
modification
capabilities
impede
exploration
of
high‐performance
catalysts.
Herein,
CuCoO/Co(OH)
2
structure
via
situ
activation
is
synthesized.
catalyst
delivers
a
maximum
NH
Faradaic
efficiency
(FE)
94.7%
at
−0.5
V
RHE
with
excellent
durability
selectivity
over
wide
range
potentials
RR,
surpassing
electrocatalytic
performance
both
undoped
core
components.
outstanding
Cu─CoO/Co(OH)
ascribed
enhanced
charge
transfer,
stabilization
key
intermediates,
regulation
hydrogen
adsorption
Cu‐doped
structure.
Furthermore,
assembled
Zn−NO
battery
device
attains
peak
current
density
exceeding
32
mA
cm
−2
yield
up
145.4
µmol
h
−1
.
work
offers
novel
strategy
sheds
light
on
doping
effects
synthesis.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 16, 2024
Abstract
The
electrocatalytic
nitrate
reduction
reaction
(NO
3
−
RR)
presents
a
promising
pathway
for
achieving
both
ammonia
(NH
)
electrosynthesis
and
water
pollutant
removal
simultaneously.
Among
various
electrocatalysts
explored,
2D
materials
have
emerged
as
candidates
due
to
their
ability
regulate
electronic
states
active
sites
through
doping.
However,
the
impact
of
doping
effects
in
on
mechanism
NO
RR
remains
relatively
unexplored.
Here,
Ni‐doped
MoS
2
(Ni‐MoS
nanosheets
are
investigated
model
system,
demonstrating
enhanced
performance
compared
undoped
counterparts.
By
controlling
concentration,
Ni‐MoS
achieve
remarkable
faradic
efficiency
(FE)
92.3%
NH
at
−0.3
V
RHE
with
excellent
stability.
mechanistic
studies
reveal
that
elevation
performances
originates
from
generation
more
hydrogen
acceleration
nitrite
facilitated
by
Ni
Combining
experimental
observations
theoretical
calculations
it
is
revealed
appropriate
level
can
enhance
*NO
adsorption
strength,
thereby
facilitating
subsequent
steps.
Together
demonstration
Zn−NO
battery
devices,
work
provides
new
insights
into
design
regulation
material
catalysts
efficient
RR.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(48)
Опубликована: Авг. 16, 2024
Abstract
The
nitrate
electroreduction
reaction
(NO
3
RR)
offers
an
eco‐friendly
alternative
to
the
Haber–Bosch
technology
for
ammonia
(NH
)
synthesis.
However,
complex
process
and
diverse
products
make
efficient
NH
synthesis
challenging.
Therefore,
rational
design
preparation
of
highly
electrocatalysts
are
crucial
NO
RR.
Herein,
ultrathin
copper‐nickel
oxide
(Cu‐NiO)
nanosheets
(Cu‐NiO
UTNSs)
synthesized
via
cyanogel‐NaBH
4
hydrolysis‐reduction
method,
which
applied
cathodic
RR
‐assisted
with
anodic
sulfur
ion
(S
2−
oxidation
(SOR)
in
electrolyzer.
nanosheet
structure,
interaction
between
NiO
Cu,
formation
oxygen
vacancy
contribute
generating
rich
active
sites,
regulating
electronic
improving
substance
adsorption.
Thus,
Cu‐NiO
UTNSs
exhibit
excellent
electrocatalytic
performance
SOR.
As
a
bifunctional
UTNSs||Cu‐NiO
electrolyzer,
it
can
reach
10
mA
cm
−1
at
only
0.1
V
−
‐to‐NH
conversion
cathode
S
‐to‐S
8
anode.
This
work
provides
promising
approach
producing
value‐added
chemicals
low
electrolysis
voltage
strategy
pollutant
treatment.
Abstract
Inexpensive
iron‐based
materials
are
considered
promising
electrocatalysts
for
nitrate
(NO
3
−
)
reduction,
but
their
catalytic
activity
and
spontaneous
corrosion
remain
challenges.
Here,
the
α‐Fe
2
O
active
surface
is
reconstructed
by
gradient
phosphorization
to
obtain
FeP
x
with
higher
electrochemical
activity.
2.0
optimizes
adsorption
energy
of
NO
its
reduction
intermediates,
meanwhile
promote
generation
hydrogen
(
*
H)
inhibit
H
.
More
importantly,
Fe
P
can
serve
as
binding
sites
H,
respectively,
which
improves
electron
utilization
deoxygenation
efficiency
subsequent
hydrogenation
selective
synthesis
NH
91.7%
conversion
rate
achieved
100
mL
200
mg
L
−1
−N,
99.3%
ammonia
(NH
selectivity
(yield
1.79
h
cm
−2
),
91.4%
Faraday
in
h.
The
high‐purity
solid
4
Cl
finally
extracted
gas
extraction
vacuum
distillation
(81.4%
recovery).
This
study
provides
new
insights
strategies
products
over
electrocatalysts.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Abstract
The
electrochemical
transformation
of
nitrate
(NO
3
−
)
into
ammonia
(NH
holds
significant
promise
to
addresses
nitration
contamination
and
offers
a
sustainable
alternative
the
Haber–Bosch
process.
However,
sluggish
kinetics
hinders
its
large‐scale
application.
Herein,
Cu‐doped
SrRuO
synergetic
tandem
catalyst
is
designed
synthesized,
which
demonstrates
exceptional
performance
in
converting
NO
NH
.
Specifically,
this
achieves
maximum
Faradaic
efficiency
95.4%
for
production,
along
with
high
yield
rate
7196
µg
h
−1
mg
cat.
A
series
detailed
characterizations
reveals
that
doped
Cu
ions
modify
local
electronic
environment
Ru
4
d
e
g
orbital
,
thereby
facilitating
highly
efficient
electron
transfer
processes.
In
situ
delta
X‐ray
absorption
near‐edge
structure
(ΔXANES),
synchrotron
radiation‐based
Fourier
transform
infrared
(SR‐FTIR)
Raman
spectroscopy
identified
*
2
generated
on
active
sites
subsequently
hydrogenated
sites.
Combined
theoretical
studies,
it
confirmed
significantly
reduces
energy
barriers
rate‐determining
step
(
NOH),
enhancing
synthesis.
This
work
not
only
fundamental
insights
mechanisms
cation
substitution
regulating
perovskite
catalysts,
but
also
provides
promising
avenue
electro‐synthesis
ammonia.
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.
