iScience,
Год журнала:
2023,
Номер
26(7), С. 107100 - 107100
Опубликована: Июнь 16, 2023
Electrochemical
reduction
of
nitrite
(NO2-)
can
satisfy
the
necessity
for
NO2-
contaminant
removal
and
deliver
a
sustainable
pathway
ammonia
(NH3)
generation.
Its
practical
application
yet
requires
highly
efficient
electrocatalysts
to
boost
NH3
yield
Faradaic
efficiency
(FE).
In
this
study,
CoP
nanoparticle-decorated
TiO2
nanoribbon
array
on
Ti
plate
(CoP@TiO2/TP)
is
verified
as
high-efficiency
electrocatalyst
selective
NH3.
When
measured
in
0.1
M
NaOH
with
NO2-,
freestanding
CoP@TiO2/TP
electrode
delivers
large
849.57
μmol
h-1
cm-2
high
FE
97.01%
good
stability.
Remarkably,
subsequently
fabricated
Zn-NO2-
battery
achieves
power
density
1.24
mW
while
delivering
714.40
μg
cm-2.
Advanced Materials,
Год журнала:
2022,
Номер
34(14)
Опубликована: Фев. 12, 2022
Electrochemical
N2
oxidation
reaction
(NOR),
using
water
and
in
the
atmosphere,
represents
a
sustainable
approach
for
nitric
production
to
replace
conventional
industrial
synthesis
with
high
energy
consumption
greenhouse
gas
emission.
Meanwhile,
owing
chemical
inertness
of
sluggish
kinetics
10-electron
transfer,
emerging
electrocatalysts
remain
largely
underexplored.
Herein,
Ru-nanoclusters-coupled
Mn3
O4
catalysts
decorated
atomically
dispersed
Ru
atoms
(Ru-Mn3
)
are
designed
explored
as
an
advanced
electrocatalyst
ambient
oxidation,
excellent
Faraday
efficiency
(28.87%)
remarkable
NO3-
yield
(35.34
µg
h-1
mg-1cat.
),
respectively.
Experiments
density
functional
theory
calculations
reveal
that
outstanding
activity
is
ascribed
coexistence
clusters
single-atom
Ru.
The
synergistic
effect
between
can
effectively
activate
chemically
inert
,
lowering
kinetic
barrier
vital
breakage
N≡N.
intensive
*OH
supply
enhanced
conductivity
used
regulate
catalytic
optimized
performance.
This
work
provides
brand-new
ideas
rational
design
complicated
electrocatalytic
reactions
multiple
dynamics-different
steps.
Electrochemical
nitrate
(NO3-
)
reduction
reaction
RR)
is
a
potential
sustainable
route
for
large-scale
ambient
ammonia
(NH3
synthesis
and
regulating
the
nitrogen
cycle.
However,
as
this
involves
multi-electron
transfer
steps,
it
urgently
needs
efficient
electrocatalysts
on
promoting
NH3
selectivity.
Herein,
rational
design
of
Co
nanoparticles
anchored
TiO2
nanobelt
array
titanium
plate
(Co@TiO2
/TP)
presented
high-efficiency
electrocatalyst
NO3-
RR.
Density
theory
calculations
demonstrate
that
constructed
Schottky
heterostructures
coupling
metallic
with
semiconductor
develop
built-in
electric
field,
which
can
accelerate
rate
determining
step
facilitate
adsorption,
ensuring
selective
conversion
to
.
Expectantly,
Co@TiO2
/TP
attains
an
excellent
Faradaic
efficiency
96.7%
high
yield
800.0
µmol
h-1
cm-2
under
neutral
solution.
More
importantly,
heterostructure
catalyst
also
presents
remarkable
stability
in
50-h
electrolysis
test.
iScience,
Год журнала:
2023,
Номер
26(7), С. 107100 - 107100
Опубликована: Июнь 16, 2023
Electrochemical
reduction
of
nitrite
(NO2-)
can
satisfy
the
necessity
for
NO2-
contaminant
removal
and
deliver
a
sustainable
pathway
ammonia
(NH3)
generation.
Its
practical
application
yet
requires
highly
efficient
electrocatalysts
to
boost
NH3
yield
Faradaic
efficiency
(FE).
In
this
study,
CoP
nanoparticle-decorated
TiO2
nanoribbon
array
on
Ti
plate
(CoP@TiO2/TP)
is
verified
as
high-efficiency
electrocatalyst
selective
NH3.
When
measured
in
0.1
M
NaOH
with
NO2-,
freestanding
CoP@TiO2/TP
electrode
delivers
large
849.57
μmol
h-1
cm-2
high
FE
97.01%
good
stability.
Remarkably,
subsequently
fabricated
Zn-NO2-
battery
achieves
power
density
1.24
mW
while
delivering
714.40
μg
cm-2.
