Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 14, 2025
Abstract
Electrocatalytic
nitrate
reduction
(NO
3
RR)
to
ammonia
(NH
)
has
great
potential
address
the
challenges
caused
by
Habor‐Bosch
process.
However,
sluggish
kinetic,
complex
mechanisms
and
competitive
reactions
seriously
reduce
Faradaic
efficiency
(FE)
yield
of
NH
.
Transition
metal‐based
compounds
are
promising
catalysts
for
electrocatalytic
NO
RR,
where
anions
can
tune
electronic
structure
metal
cation
sites.
In
this
work,
oxygen
(O)
phosphorus
(P)
introduced
regulate
nickel
(Ni)
reveal
mechanism
anion
regulation
in
RR.
The
electrosynthesis
performance
is
ranked
as
follows:
Ni
2
P
surpasses
Ni,
which
turn
outperforms
NiO.
Notably,
nanosheets
exhibit
a
maximum
FE
97.4%
15.4
mg
h
−
¹
cm
−2
Characterization
theoretical
calculation
indicate
that
introduction
moderately
alters
resulting
reduced
energy
barriers
rate‐limiting
step
RR
improved
H
O
decomposition
generate
active
hydrogen,
subsequently
enhances
production.
This
work
highlights
critical
role
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 5, 2025
Abstract
Aqueous
Zn‐ion
batteries
are
promising
for
large‐scale
energy
storage
due
to
low
cost
and
high
safety.
However,
aqueous
electrolyte
induces
severe
side
reactions
at
Zn
anode,
especially
hydrogen
evolution
reaction
(HER).
Herein,
it
is
first
revealed
that
the
freshly
nucleated‐Zn
(FN‐Zn)
atoms
during
plating
process
show
higher
reactivity
stronger
adsorption
of
proton
than
metallic
anode
by
X‐ray
absorption
near
edge
structure
(XANES)
corresponding
extended
fine
(EXAFS),
density
functional
theory
simulations,
promoting
decomposition
H
2
O.
Then,
a
universal
effective
capping
effect
strategy
proposed
alleviate
HER
electrostatically
shielding
FN‐Zn
activity.
Specifically,
sodium
benzenesulfonate
(SBS)
selected
as
typical
example
screening
comparing
series
additives,
in
which
sulfonate
group
with
coordination
can
be
preferentially
capped
on
reduce
its
reactivity.
Consequently,
symmetrical
cell
SBS
not
only
generates
negligible
amounts
situ
electrochemical‐gas
chromatography
but
also
up
2550
h
1
mA
cm
−2
.
More
importantly,
HER‐free
verified
coin
full
cells
exhibiting
capacity
retention
of≈87.1%
after
1000
cycles
large‐area
(4
×
6
)
pouch
desired
performance.
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
The
orientation
of
β-CuPc
favours
the
overlap
central
Cu
with
N
parallel
molecules,
which
is
reason
behind
high
electrical
conductivity
and
selectivity
in
NH
3
production
via
nitrate
reduction,
impossible
other
polymorphs.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 17, 2025
Abstract
Electrochemical
nitrate
reduction
reaction
(NO
3
−
RR)
has
emerged
as
an
alternative
strategy
for
wastewater
treatment
and
ammonia
production
in
neutral
low‐concentration
nitrate.
However,
the
electrocatalyst
faces
challenge
of
limited
NO
distribution
deficient
active
hydrogen
(H
ads
)
on
catalyst
surface
resulting
from
low
concentration
difficulty
water
splitting
under
conditions.
Here,
a
Cu‐Co
dual
sites
tandem
synergistic
catalysis
mechanism
been
proposed
by
doping
Cu
into
CoP
to
facilitate
adsorption
conversion
accelerate
leading
significantly
high
RR
performance.
The
designed
Cu‐CoP
exhibits
yield
7.65
mg
h
−1
cm
−2
Faraday
efficiency
85.1%
at
−1.0
V
(10
m
M
),
which
is
highest
reported
data.
In
situ
characterization
theoretical
calculations
confirm
effect,
site
favors
activation
form
2
,
concurrently
modulates
electronic
structure
Co
with
optimized
H
enhanced
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 28, 2025
Electrochemical
nitrate
reduction
reaction
(eNO3-RR)
to
ammonia
(NH3)
holds
great
promise
for
the
green
treatment
of
NO3-
and
ambient
NH3
synthesis.
Although
Fe-based
electrocatalysts
have
emerged
as
promising
alternatives,
their
excellent
eNO3-RR-to-NH3
activity
is
usually
limited
harsh
alkaline
electrolytes
or
alloying
noble
metals
with
Fe
in
sustainable
neutral
electrolytes.
Herein,
we
demonstrate
an
unusual
self-triggering
localized
alkalinity
Co4Fe6
electrocatalyst
efficient
media,
which
breaks
down
conventional
pH-dependent
kinetics
restrictions
shows
a
98.6%
Faradaic
efficiency
(FE)
99.9%
selectivity
at
-0.69
V
vs
RHE.
The
synergetic
Co-Fe
dual
sites
were
demonstrated
enable
optimal
free
energies
species
balance
water
dissociation
protonation
adsorbed
NO2-.
Notably,
can
attain
high
current
density
100
mA
cm-2
FE
surpassing
96%
long-term
stability
over
500
h
membrane
electrode
assembly
(MEA)
electrolyzer.
This
work
provides
insight
into
tailoring
self-reinforced
local-alkalinity
on
alloy
thus
avoids
practical
upcycling
technology.
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.
