Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(31)
Published: June 30, 2023
Abstract
The
electrochemical
nitrate
reduction
reaction
(NO
3
RR)
is
a
promising
approach
for
removal
and
NH
synthesis
at
ambient
conditions.
As
complex
eight‐electron/nine‐proton
transfer
process,
its
performance
relies
heavily
on
the
adsorption
ability
of
intermediates
catalyst
surface,
which
determined
by
geometric
electronic
configurations
active
sites.
In
this
work,
heteroatom
ensemble
effect
deliberately
triggered
over
RuFe
bimetallic
alloy
to
optimize
intermediate
NO
RR.
A
record‐high
yield
rate
118.8
mg
h
−1
high
Faradaic
efficiency
92.2%
are
achieved
−1.4
V
vs
reversible
hydrogen
electrode,
ranking
top
state‐of‐the‐art.
Experimental
computational
results
reveal
that
characteristics
induced
play
crucial
roles.
Both
Ru
Fe
display
continuous
state
throughout
Fermi
level,
suggesting
electron
density
benefits
whole
result,
facilitated
−
,
efficient
stabilization
key
intermediates,
as
well
timely
desorption
simultaneously
achieved,
thus
significantly
promoting
direct
.
Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: Dec. 27, 2022
Electrochemical
nitrate
reduction
to
ammonia
is
a
promising
alternative
strategy
the
traditional
Haber-Bosch
process
but
suffers
from
low
Faradaic
efficiency
and
limited
yield
due
sluggish
multi-electron/proton-involved
steps.
Herein,
we
report
typical
hollow
cobalt
phosphide
nanosphere
electrocatalyst
assembled
on
self-supported
carbon
nanosheet
array
synthesized
with
confinement
that
exhibits
an
extremely
high
rate
of
8.47
mmol
h
Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: Dec. 22, 2022
Abstract
The
development
of
electrocatalysts
capable
efficient
reduction
nitrate
(NO
3
−
)
to
ammonia
(NH
is
drawing
increasing
interest
for
the
sake
low
carbon
emission
and
environmental
protection.
Herein,
we
present
a
CuCo
bimetallic
catalyst
able
imitate
bifunctional
nature
copper-type
nitrite
reductase,
which
could
easily
remove
NO
2
via
collaboration
two
active
centers.
Indeed,
Co
acts
as
an
electron/proton
donating
center,
while
Cu
facilitates
x
adsorption/association.
bio-inspired
nanosheet
electrocatalyst
delivers
100
±
1%
Faradaic
efficiency
at
ampere-level
current
density
1035
mA
cm
−2
−0.2
V
vs
.
Reversible
Hydrogen
Electrode.
NH
production
rate
reaches
high
activity
4.8
mmol
h
−1
(960
g
cat
).
A
mechanistic
study,
using
electrochemical
in
situ
Fourier
transform
infrared
spectroscopy
shell-isolated
nanoparticle
enhanced
Raman
spectroscopy,
reveals
strong
synergy
between
Co,
with
sites
promoting
hydrogenation
adsorbed
*H
species.
well-modulated
coverage
*NO
led
simultaneously
selectivity
yield.
Deleted Journal,
Journal Year:
2022,
Volume and Issue:
1, P. e9120010 - e9120010
Published: May 30, 2022
To
restore
the
natural
nitrogen
cycle
(N-cycle),
artificial
N-cycle
electrocatalysis
with
flexibility,
sustainability,
and
compatibility
can
convert
intermittent
renewable
energy
(e.g.,
wind)
to
harmful
or
value-added
chemicals
minimal
carbon
emissions.
The
background
of
such
N-cycles,
as
fixation,
ammonia
oxidation,
nitrate
reduction,
is
briefly
introduced
here.
discussion
emerging
nanostructures
in
various
conversion
reactions
focused
on
architecture/compositional
design,
electrochemical
performances,
reaction
mechanisms,
instructive
tests.
Energy
device
advancements
for
achieving
more
functions
well
in
situ/operando
characterizations
toward
understanding
key
steps
are
also
highlighted.
Furthermore,
some
recently
proposed
less
discussed
C–N
coupling
summarized.
We
classify
inorganic
sources
that
each
other
under
an
applied
voltage
into
three
types,
namely,
abundant
nitrogen,
toxic
(nitrite),
oxides,
useful
compounds
ammonia,
hydrazine,
hydroxylamine,
goal
providing
critical
insights
strategies
facilitate
development
our
circular
economy.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: June 19, 2023
Electrochemical
conversion
of
nitrate
to
ammonia
offers
an
efficient
approach
reducing
pollutants
and
a
potential
technology
for
low-temperature
low-pressure
synthesis.
However,
the
process
is
limited
by
multiple
competing
reactions
NO3-
adsorption
on
cathode
surfaces.
Here,
we
report
Fe/Cu
diatomic
catalyst
holey
nitrogen-doped
graphene
which
exhibits
high
catalytic
activities
selectivity
production.
The
enables
maximum
Faradaic
efficiency
92.51%
(-0.3
V(RHE))
NH3
yield
rate
1.08
mmol
h-1
mg-1
(at
-
0.5
V(RHE)).
Computational
theoretical
analysis
reveals
that
relatively
strong
interaction
between
promotes
discharge
anions.
Nitrogen-oxygen
bonds
are
also
shown
be
weakened
due
existence
hetero-atomic
dual
sites
lowers
overall
reaction
barriers.
dual-site
hetero-atom
strategy
in
this
work
provides
flexible
design
further
development
expands
electrocatalytic
techniques
reduction
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(17)
Published: June 9, 2023
Natural
nitrogen
cycle
has
been
severely
disrupted
by
anthropogenic
activities.
The
overuse
of
N-containing
fertilizers
induces
the
increase
nitrate
level
in
surface
and
ground
waters,
substantial
emission
oxides
causes
heavy
air
pollution.
Nitrogen
gas,
as
main
component
air,
used
for
mass
ammonia
production
over
a
century,
providing
enough
nutrition
agriculture
to
support
world
population
increase.
In
last
decade,
researchers
have
made
great
efforts
develop
processes
under
ambient
conditions
combat
intensive
energy
consumption
high
carbon
associated
with
Haber-Bosch
process.
Among
different
techniques,
electrochemical
reduction
reaction
(NO
Energy & Environmental Science,
Journal Year:
2023,
Volume and Issue:
16(6), P. 2611 - 2620
Published: Jan. 1, 2023
The
grain
boundary
defect
engineered
Ni
nanoparticles
has
been
explored
for
boosting
selective
nitrate
electroreduction
to
ammonia,
and
its
NH
3
generation
rate
is
much
higher
than
those
of
the
reported
copper
or
noble
metal-based
catalysts.
