Catalysts,
Год журнала:
2024,
Номер
14(11), С. 817 - 817
Опубликована: Ноя. 13, 2024
Electrocatalytic
nitrate
reduction
enables
the
recovery
of
from
water
under
mild
conditions
and
generates
ammonia
for
nitrogen
fertilizer
feedstock
in
an
economical
green
means.
In
this
paper,
Co/biomass
carbon
(Co/BC)
composite
catalysts
were
prepared
by
co-carbonization
straw
metal–organic
framework
material
ZIF-67
electrocatalytic
using
hydrothermal
annealing
methods.
The
structure
disperses
catalyst
components
well
provides
a
wider
specific
surface
area,
which
is
conducive
to
adsorption
provision
more
reactive
active
sites.
introduction
biomass
additionally
enhances
electrical
conductivity
facilitates
electron
transport.
After
electrochemical
testing,
Co/BC-100
exhibited
best
performance
ammonia,
with
yield
3588.92
mmol
gcat.−1
h−1
faradaic
efficiency
97.01%
at
−0.5
V
vs.
RHE
potential.
This
study
promising
approach
construction
other
efficient
cobalt-based
electrocatalysts.
Abstract
Electrocatalytic
nitrate
(NO
3
−
)
reduction
to
ammonia
(NH
is
a
green
and
efficient
NH
synthesis
technology.
Metallic
silver
(Ag)
one
of
the
well‐known
electrocatalysts
for
NO
reduction.
However,
under
alkaline
conditions,
its
poor
water‐splitting
ability
fails
provide
sufficient
protonic
hydrogen
required
synthesis,
resulting
in
low
selectivity.
Additionally,
metal
catalysts
are
prone
leaching
oxidation
during
electrocatalysis,
stability.
Herein,
cobalt
(Co)
into
Ag
(CoAg)
catalyst
doped,
which
not
only
increases
selectivity
by
34.4%,
but
also
reduces
potential
0.1
V.
Meanwhile,
reduced
graphene
oxide
(rGO)
as
protective
“armor”
used
encapsulate
CoAg
(rGO
2.92
@CoAg).
The
rGO
@CoAg
shows
excellent
stability
over
300
hours
(h)
continuous
reaction.
Co
contents
after
tests
decreases
4.3%
3.1%,
respectively,
much
lower
than
those
without
(90.8%,
52.6%).
Moreover,
high
Faradaic
efficiency
(99.3%)
yield
rate
(1.47
mmol
h
−1
cm
−2
).
Therefore,
performance
strong
obtained
doping
coating,
provides
theoretical
basis
practical
industrial
application.
Catalysts,
Год журнала:
2024,
Номер
14(11), С. 817 - 817
Опубликована: Ноя. 13, 2024
Electrocatalytic
nitrate
reduction
enables
the
recovery
of
from
water
under
mild
conditions
and
generates
ammonia
for
nitrogen
fertilizer
feedstock
in
an
economical
green
means.
In
this
paper,
Co/biomass
carbon
(Co/BC)
composite
catalysts
were
prepared
by
co-carbonization
straw
metal–organic
framework
material
ZIF-67
electrocatalytic
using
hydrothermal
annealing
methods.
The
structure
disperses
catalyst
components
well
provides
a
wider
specific
surface
area,
which
is
conducive
to
adsorption
provision
more
reactive
active
sites.
introduction
biomass
additionally
enhances
electrical
conductivity
facilitates
electron
transport.
After
electrochemical
testing,
Co/BC-100
exhibited
best
performance
ammonia,
with
yield
3588.92
mmol
gcat.−1
h−1
faradaic
efficiency
97.01%
at
−0.5
V
vs.
RHE
potential.
This
study
promising
approach
construction
other
efficient
cobalt-based
electrocatalysts.
