ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(19), P. 18238 - 18246
Published: Oct. 4, 2023
At
present,
a
variety
of
catalysts
have
been
studied
and
used
for
the
electrocatalytic
reduction
nitrate.
However,
it
is
still
great
challenge
to
improve
selectivity
nitrate
reaction
(NO3–RR)
catalyst
ammonia
reduce
activity
competitive
reaction.
Herein,
two-dimensional
CuOx
nanosheets
with
abundant
oxygen
vacancy
defects
were
in
situ
grown
on
Cu
nanoparticles
construct
Cu/2D-CuOx
composite
nanomaterials
as
electrocatalysts.
The
(2D)
nanosheet
morphology
facilitated
exposure
active
sites
promoted
mass/charge
transfer
process
during
electrocatalysis.
As
result,
synergistic
effect
2D
nanosheet-like
structure
surface
endows
superior
performance
reaction,
achieving
high
(97.56%)
NH4+
yield
(1476
μg
h–1
mg–1).
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(3), P. 2501 - 2510
Published: Jan. 11, 2024
This
work
aimed
to
improve
the
Faraday
efficiency
and
formation
rate
of
ammonia
with
a
low
reaction
potential
in
electroreduction
nitrate.
For
this
purpose,
CuCo
bimetallic
interface-rich
catalysts
confined
porous
nitrogen-doped
carbon
nanocages
(CuCo/NC)
were
designed.
Results
situ
Fourier
transform
infrared
spectroscopy
suggested
that
path
followed
sequence
NO3–
→
*NO3
*NO2
*NO
*NOH
*NH2OH
*NH3
NH3.
Density
functional
theory
calculations
revealed
adsorption
nitrate
over
interface
was
thermodynamically
favorable.
changed
rate-determining
step
reduction
at
Cu
sites
from
hydrogenation
promoted
continuous
nitrogen-related
intermediates.
Over
CuCo/NC
catalyst,
95.1%
(at
−0.59
V
vs
reversible
hydrogen
electrode
(RHE))
9110.8
μg
h–1
mgcat.–1
−0.79
RHE),
which
higher
than
those
Cu/NC
Co/NC
catalysts.
Environmental Science & Technology Letters,
Journal Year:
2024,
Volume and Issue:
11(6), P. 640 - 647
Published: May 31, 2024
Water
desalination
by
capacitive
deionization
techniques
has
often
suffered
from
the
relegating
performance
of
carbon-based
non-Faradaic
electrode
materials.
To
overcome
rate-limiting
charge
transfer
kinetics
and
weak
ion
adsorption
tendency,
a
metal–organic
framework
(MOF)-derived
hybrid
with
an
exceptional
flow
is
reported
here.
Using
MIL-88(FeNi)
as
sacrificial
template,
we
synthesized
porous
graphitic
decorated
nanosized
spinel
NiFe2O4
(NiFe2O4@PC-500)
electrodes,
maintaining
parent
rod-shaped
morphology
large
surface
area
1227
m2/g.
The
synergistic
interaction
nanoparticles
mesoporous
exhibited
remarkable
salt
capacity
∼34
mg/g
∼89%
removal
at
1.2
V,
surpassing
those
traditional
electrodes.
Moreover,
NiFe2O4@PC-500
maintained
its
structural
integrity
over
prolonged
cycles
specific
capacitance
∼206
F/g
retention
500
cycles.
This
study
presents
universal
approach
for
strategically
implementing
MOF-derived
heterostructures
potent
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(19), P. 18238 - 18246
Published: Oct. 4, 2023
At
present,
a
variety
of
catalysts
have
been
studied
and
used
for
the
electrocatalytic
reduction
nitrate.
However,
it
is
still
great
challenge
to
improve
selectivity
nitrate
reaction
(NO3–RR)
catalyst
ammonia
reduce
activity
competitive
reaction.
Herein,
two-dimensional
CuOx
nanosheets
with
abundant
oxygen
vacancy
defects
were
in
situ
grown
on
Cu
nanoparticles
construct
Cu/2D-CuOx
composite
nanomaterials
as
electrocatalysts.
The
(2D)
nanosheet
morphology
facilitated
exposure
active
sites
promoted
mass/charge
transfer
process
during
electrocatalysis.
As
result,
synergistic
effect
2D
nanosheet-like
structure
surface
endows
superior
performance
reaction,
achieving
high
(97.56%)
NH4+
yield
(1476
μg
h–1
mg–1).
