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.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(43)
Published: June 25, 2023
Abstract
Ammonia
as
an
irreplaceable
chemical
has
been
widely
demanded
to
keep
the
sustainable
development
of
modern
society.
However,
its
industrial
production
consumes
huge
energy
and
releases
extraordinary
green‐house
gases,
leading
various
environmental
issues.
To
achieve
green
ammonia
is
a
great
challenge
that
extensively
pursued
recently.
In
review,
most
promising
strategy,
electrochemical
nitrate
reduction
reaction
(e‐NO
3
RR)
for
purpose
comprehensively
investigated
give
full
understanding
mechanism
provide
guidance
future
directions.
Particularly,
electrocatalysts
focused
realize
high
yield
rate
Faraday
efficiency
applications.
The
recent‐developed
catalysts,
including
noble
metallic
materials,
alloys,
metal
compounds,
single‐metal‐atom
metal‐free
are
systematically
discussed
review
effects
factors
on
catalytic
performance
in
e‐NO
RR.
Accordingly,
strategies,
defects
engineering,
coordination
environment
modulating,
surface
controlling,
hybridization,
carefully
improve
performance,
such
intrinsic
activity
selectivity.
Finally,
perspectives
challenges
given
out.
This
shall
insightful
advanced
systems
efficiently
industry.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(44)
Published: May 27, 2024
Abstract
Electrochemical
reduction
of
nitrate
(NO
3
RR)
holds
great
promise
for
environmentally
friendly
ammonia
production.
Tandem
catalysis
is
a
promising
strategy
boosting
the
NO
RR
and
inhibiting
side
effects,
but
it
still
challenged
by
lacking
well‐designed
catalysts
to
drive
this
catalytic
process.
Herein,
study
develops
CuCo
branched
nanowires
(CuCo
NW)
catalyst,
which
efficiently
converts
−
NH
on
Co
(111)
Cu
crystal
facets
through
tandem
mechanism.
The
in
situ
grown
NW
foam
demonstrates
remarkable
Faraday
efficiency
90.3%
at
1.0
A
cm
−2
maintains
stable
operation
200
h
100
mA
flow
reactor.
Density
functional
theory
calculations
suggest
that
initial
absorption
subsequent
deoxygenation
*NO
leading
formation
2
,
followed
its
transfer
further
conversion
*NH
establish
an
optimal
pathway
managing
rate‐determining
steps
individual
surfaces
RR.
To
showcase
practical
application
scaling‐up
prototype
reactor
continuous
production,
realizing
gram‐level
yield
rate
1474.09
mg
−1
91.26%
practical‐level
20.0
A.
Small,
Journal Year:
2024,
Volume and Issue:
20(33)
Published: March 13, 2024
Abstract
Ammonia
production
by
electrocatalytic
nitrate
reduction
reaction
(NO
3
RR)
in
water
streams
is
anticipated
as
a
zero‐carbon
route.
Limited
dilute
natural
sewage
and
the
electrostatic
repulsion
between
NO
−
cathode,
RR
can
hardly
be
achieved
energy‐efficiently.
The
hydrophilic
Cu@CuCoO
2
nano‐island
dispersed
on
support
enrich
produce
sensitive
current
response,
followed
electrosynthesis
of
ammonia
through
atomic
hydrogen
(*H)
reported.
accumulated
partially
converted
to
without
external
electric
field
input,
confirming
that
strongly
bind
then
trigger
via
dynamic
evolution
Cu–Co
redox
sites.
Through
identification
intermediates
theoretical
computation.
it
found
N‐side
hydrogenation
*NO
optimal
step,
formation
N─N
dimer
may
prevented.
An
NH
product
selectivity
93.5%,
conversion
96.1%,
an
energy
consumption
0.079
kWh
g
NH3
−1
obtained
48.9
mg‐N
L
naturally
nitrate‐polluted
streams,
which
outperforms
many
works
using
such
influent.
Conclusively,
system
provides
platform
guarantee
self‐sufficiency
agricultural
regions.
Environmental Science and Ecotechnology,
Journal Year:
2023,
Volume and Issue:
20, P. 100383 - 100383
Published: Dec. 28, 2023
Global
water
bodies
are
increasingly
imperiled
by
nitrate
pollution,
primarily
originating
from
industrial
waste,
agricultural
runoffs,
and
urban
sewage.
This
escalating
environmental
crisis
challenges
traditional
treatment
paradigms
necessitates
innovative
solutions.
Electro-catalysis,
especially
utilizing
copper-based
catalysts,
known
for
their
efficiency,
cost-effectiveness,
eco-friendliness,
offer
a
promising
avenue
the
electro-catalytic
reduction
of
to
ammonia.
In
this
review,
we
systematically
consolidate
current
research
on
diverse
including
pure
Cu,
Cu
alloys,
oxides,
single-atom
entities,
composites.
Furthermore,
assess
catalytic
performance,
operational
mechanisms,
future
directions
find
effective,
long-term
solutions
purification
ammonia
synthesis.
Electro-catalysis
technology
shows
potential
in
mitigating
pollution
has
strategic
importance
sustainable
management.
As
application,
regarding
complexity
real
water,
scale-up
commerical
efficient
collection
produced
NH
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(25), P. 9433 - 9441
Published: June 14, 2023
Electrocatalytic
nitrate
reduction
reaction
(NO3–RR)
has
been
considered
a
promising
technology
to
produce
ammonia
but
is
inhibited
by
poor
electrocatalytic
performances.
Therefore,
the
development
of
efficient
electrocatalysts
and
investigation
corresponding
mechanisms
are
critically
important.
Herein,
an
dendritic
Cu2O/Cu
grown
on
Cu
foam
(D-Cu2O/Cu/CF)
synthesized
facile
electrodeposition
method,
synergetic
effect
Cu+
in
NO3–RR
investigated.
In
situ
ex
data
testify
clearly
that
sites
responsible
for
beginning
conversion
nitrite,
while
active
center
subsequent
nitrite
ammonia.
addition,
situ-generated
further
enhance
catalytic
extraordinarily
high
removal
rate
98.9%
together
with
relatively
yield
11.2
mg
h–1
cm–2
can
be
obtained
electrolytes
containing
90
ppm
nitrate.
