ChemCatChem,
Journal Year:
2024,
Volume and Issue:
16(14)
Published: Feb. 9, 2024
Abstract
The
excess
nitrate
(NO
3
−
)
in
water
mainly
comes
from
agricultural
fertilization
and
industrial
wastewater,
which
breaks
the
nitrogen
balance
poses
a
serious
threat
to
environment
human
health.
Driven
by
renewable
energy,
electrocatalytic
NO
reduction
ammonia
(NH
(ENO
RA)
is
an
environmentally
friendly
sustainable
technology.
Due
its
special
structure,
copper
(Cu)
currently
one
of
best
catalysts
for
ENO
RA,
but
reaction
mechanism
structure–activity
relationships
are
still
not
clear
enough.
In‐situ
characterization
powerful
tool
gain
insight
into
process.
This
review
introduces
several
types
in‐situ
techniques
such
as
XAS,
FTIR
DEMS,
summarizes
five
pathways
converting
*NO
key
intermediate
NH
during
RA
on
Cu‐based
catalysts.
research
progress
electrocatalysts
recent
years
sorted
out
aspects
composition
catalytic
mechanisms
discussed
with
help
technologies.
would
be
provide
reference
methods
exploring
design
RA.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(14)
Published: Jan. 26, 2024
Abstract
Electrocatalytic
nitrate
reduction
reaction
(NO
3
RR)
toward
ammonia
synthesis
is
recognized
as
a
sustainable
strategy
to
balance
the
global
nitrogen
cycle.
However,
it
still
remains
great
challenge
achieve
highly
efficient
production
due
complex
proton‐coupled
electron
transfer
process
in
NO
RR.
Here,
controlled
of
RuMo
alloy
nanoflowers
(NFs)
with
unconventional
face‐centered
cubic
(fcc)
phase
and
hexagonal
close‐packed/fcc
heterophase
for
RR
reported.
Significantly,
fcc
NFs
demonstrate
high
Faradaic
efficiency
95.2%
large
yield
rate
32.7
mg
h
−1
cat
at
0
−0.1
V
(vs
reversible
hydrogen
electrode),
respectively.
In
situ
characterizations
theoretical
calculations
have
unraveled
that
possess
highest
d‐band
center
superior
electroactivity,
which
originates
from
strong
Ru─Mo
interactions
intrinsic
activity
phase.
The
optimal
electronic
structures
supply
adsorption
key
intermediates
suppression
competitive
evolution,
further
determines
remarkable
performance.
successful
demonstration
high‐performance
zinc‐nitrate
batteries
suggests
their
substantial
application
potential
electrochemical
energy
systems.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Jan. 4, 2024
Abstract
The
electrochemical
conversion
of
nitrate
to
ammonia
is
a
way
eliminate
pollutant
in
water.
Cu-Co
synergistic
effect
was
found
produce
excellent
performance
generation.
However,
few
studies
have
focused
on
this
high-entropy
oxides.
Here,
we
report
the
spin-related
nitrate-to-ammonia
using
oxide
Mg
0.2
Co
Ni
Cu
Zn
O.
In
contrast,
Li-incorporated
MgCoNiCuZnO
exhibits
inferior
performance.
By
correlating
electronic
structure,
that
spin
states
are
crucial
for
pair
with
high
O
can
facilitate
generation,
while
low
decreases
These
findings
offer
important
insights
employing
and
inside
selective
catalysis.
It
also
indicates
generality
magnetic
synthesis
between
electrocatalysis
thermal
ACS Energy Letters,
Journal Year:
2023,
Volume and Issue:
8(9), P. 3658 - 3665
Published: Aug. 4, 2023
Cu-based
catalysts
have
been
widely
explored
for
the
electrochemical
nitrate
reduction
reaction
(NO3RR),
while
intrinsic
activity
and
selectivity
of
Cu
metal
NO3RR
remain
ambiguous,
preventing
a
genuine
comparison
performance.
Here
we
use
polycrystalline
foils
benchmarking
elucidate
impact
often
overlooked
factors
on
NO3RR,
including
facet
exposure,
concentration,
electrode
surface
area.
An
electropolished
foil
exhibits
higher
to
NH3
than
wet-etched
foil,
benefiting
from
greater
exposure
Cu(100)
facets
that
are
more
favorable
NO3RR.
While
shows
no
apparent
dependence
it
increases
monotonically
with
area,
which
is
attributed
promoted
conversion
intermediately
produced
NO2–
larger
electrode,
as
validated
by
15N
isotope
labeling
experiment.
Our
work
provides
mechanistic
insights
toward
rational
design
electrocatalysts.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(27)
Published: April 23, 2024
Electrocatalytic
reduction
of
nitrate
to
ammonia
provides
a
green
alternate
the
Haber-Bosch
method,
yet
it
suffers
from
sluggish
kinetics
and
low
yield
rate.
The
follows
tandem
reaction
nitrite
subsequent
hydrogenation
generate
ammonia,
Faraday
efficiency
(FE)
is
limited
by
competitive
hydrogen
evolution
reaction.
Herein,
we
design
heterostructure
catalyst
remedy
above
issues,
which
consists
Ni
nanosphere
core
Ni(OH)
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(8), P. 2682 - 2685
Published: Jan. 1, 2024
Electrochemical
NO
3
−
reduction
to
NH
is
insignificant
for
practical
applications.
Instead,
contaminants
should
be
converted
into
N
2
,
recycled
chemicals,
or
coupled
with
CO
produce
value-added
fertilizers
if
applicable.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(25)
Published: March 26, 2024
Abstract
The
oligomers
of
carbon
suboxide,
known
as
red
carbon,
exhibit
a
highly
conjugated
structure
and
semiconducting
properties.
Upon
mild
heat
treatment,
it
transforms
into
carbonaceous
framework
rich
in
oxygen
surface
terminations,
called
oxocarbon.
In
this
study,
the
abundant
functionalities
are
harnessed
anchors
to
create
oxocarbon‐supported
nanohybrid
electrocatalysts.
Starting
with
single
atomic
Cu
(II)
strongly
coordinated
atoms
on
Fehling
reaction
leads
formation
2
O
clusters.
Simultaneously,
covalent
oxocarbon
emerges
via
cross‐linking,
providing
robust
support
for
Notably,
effectively
stabilizes
clusters
very
small
size,
ensuring
their
high
durability
acidic
conditions
presence
ammonia.
synthesized
material
exhibits
superior
electrocatalytic
activity
nitrate
reduction
under
electrolyte
conditions,
yield
rate
ammonium
(NH
4
+
)
at
3.31
mmol
h
−1
mg
cat
Faradaic
efficiency
92.5%
potential
−0.4
V
(vs
RHE).
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(15), P. 11231 - 11242
Published: July 12, 2024
Electrochemical
nitrate
reduction
reaction
(NO3–RR)
offers
an
alternative
pathway
toward
ambient
ammonia
production
and
nitrogen
balance
restoration,
requiring
efficient
catalysts.
In
this
study,
a
silver-decorated
cobalt
oxide
(Ag–Co3O4)
catalyst
was
shown
to
enhance
during
NO3–RR
in
alkaline
electrolyte.
Specifically,
the
Ag–Co3O4
delivers
(NH3)
yield
rate
of
52
μmol
h–1
cm–2
with
Faradaic
efficiency
88%
at
−0.32
V
versus
RHE.
The
activity
is
6
times
higher
than
that
conventional
Co3O4
(8.8
cm–2).
catalytic
selectivity
originate
from
interaction
between
atomically
dispersed
Ag
Co3O4,
resulting
formation
active
octahedral
Co2+
species
(Co2+Oh)
unpaired
eg
electron,
which
facilitates
activation
adsorption
NO3–
ion
promotes
*NO2
adsorption,
along
its
transformation
*NO
intermediate.
This
leads
NH4+
production,
as
evidenced
by
combined
experimental
theoretical
studies.
