ACS Catalysis,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1230 - 1241
Published: Jan. 7, 2025
The
electrocatalytic
nitrate
reduction
reaction
(NitrRR)
has
attracted
great
attention
in
clean
ammonia
production,
but
it
unsatisfactory
selectivity
and
sluggish
dynamics,
owing
to
the
complex
eight-electron
transfer
process.
While
dendritic
AuCu
alloy
is
anticipated
offer
competitive
performance,
significant
challenges
remain
terms
of
insufficient
structural
regulation
an
unelucidated
enhancement
mechanism
because
complexity
involved
its
preparation.
To
address
these
issues,
we
have
developed
a
two-stage
microfluidic
platform
that
facilitates
stable
fabrication
controllable
nano
dendrites
(NDs).
Notably,
Cu
content
resultant
NDs
reaches
impressive
35.34
At%,
surpassing
traditional
liquid-phase
limitations.
Furthermore,
dendrite
structure
been
thoroughly
validated,
revealing
clear
structure–activity
relationship.
By
employing
precise
manipulation,
determined
optimal
composition
NDs,
achieving
remarkable
yield
21.93
mg
h–1
cm–2
faradic
efficiency
93.30%.
Additionally,
DFT
calculations
further
elucidate
performance
mechanism,
showing
Au3Cu1
sites
significantly
reduce
energy
barrier
(0.28
eV)
rate-determining
step
(RDS:
*NO
→
*HNO),
while
excessive
deposition
adverse
effect.
Our
work
contributes
innovative
guidance
for
design
high-performance
electrocatalysts.
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
Small,
Journal Year:
2023,
Volume and Issue:
19(42)
Published: June 17, 2023
Ammonia
(NH3
)
is
an
indispensable
feedstock
for
fertilizer
production
and
one
of
the
most
ideal
green
hydrogen
rich
fuel.
Electrochemical
nitrate
(NO3-
reduction
reaction
RR)
being
explored
as
a
promising
strategy
to
synthesize
industrial-scale
NH3
,
which
has
nonetheless
involved
complex
multi-reaction
process.
This
work
presents
Pd-doped
Co3
O4
nanoarray
on
titanium
mesh
(Pd-Co3
/TM)
electrode
highly
efficient
selective
electrocatalytic
NO3-
RR
at
low
onset
potential.
The
well-designed
Pd-Co3
/TM
delivers
large
yield
745.6
µmol
h-1
cm-2
extremely
high
Faradaic
efficiency
(FE)
98.7%
-0.3
V
with
strong
stability.
These
calculations
further
indicate
that
doping
Pd
improves
adsorption
characteristic
optimizes
free
energies
intermediates,
thereby
facilitating
kinetics
reaction.
Furthermore,
assembling
this
catalyst
in
Zn-NO3-
battery
realizes
power
density
3.9
mW
excellent
FE
98.8%
.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(25)
Published: April 2, 2024
Abstract
Renewable
electricity‐powered
nitrate/carbon
dioxide
co‐reduction
reaction
toward
urea
production
paves
an
attractive
alternative
to
industrial
processes
and
offers
a
clean
on‐site
approach
closing
the
global
nitrogen
cycle.
However,
its
large‐scale
implantation
is
severely
impeded
by
challenging
C–N
coupling
requires
electrocatalysts
with
high
activity/selectivity.
Here,
cobalt‐nanoparticles
anchored
on
carbon
nanosheet
(Co
NPs@C)
are
proposed
as
catalyst
electrode
boost
yield
Faradaic
efficiency
(FE)
electrosynthesis
enhanced
coupling.
Such
Co
NPs@C
renders
superb
urea‐producing
activity
FE
reaching
54.3%
of
2217.5
µg
h
−1
mg
cat.
,
much
superior
NPs
C
counterparts,
meanwhile
shows
strong
stability.
The
affords
rich
catalytically
active
sites,
fast
reactant
diffusion,
sufficient
catalytic
surfaces‐electrolyte
contacts
favored
charge
ion
transfer
efficiencies.
theoretical
calculations
reveal
that
high‐rate
formation
*CO
*NH
2
intermediates
crucial
for
facilitating
synthesis.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(23)
Published: April 21, 2024
Abstract
Owing
to
the
presence
of
a
substantial
concentration
chlorine
in
seawater,
anode
still
faces
severe
corrosion,
especially
water
splitting
operated
at
high
current
densities.
Herein,
cost‐effective
and
scalable
NiFe
layered
double
hydroxides
with
carbonate
intercalation
(named
as
LDH_CO
3
2−
)
are
synthesized
utilizing
etching‐hydrolysis
ion
exchange
strategies
under
ambient
conditions.
Experimental
findings
demonstrate
that
shows
excellent
stability
500
1000
mA
cm
−2
for
h
alkaline
simulated
seawater.
Additionally,
two‐electrode
system
offers
great
densities
ranging
from
100
over
duration
400
This
remarkably
catalytic
can
be
ascribed
strategies.
The
strategy
leads
an
integrated
electrode
catalyst‐carrier,
enhancing
adhesion
between
them,
retarding
hence
divorce
catalysts
carrier.
Theoretical
calculations
suggest
weakens
adsorbability
on
hinders
coupling
metal
atoms
chlorine,
thereby
impeding
corrosion
caused
by
improving
stability.
More
importantly,
this
has
been
extended
preparation
other
intercalation.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(8), P. 6701 - 6722
Published: April 8, 2024
Electrochemical
nitrate
reduction
is
the
process
of
converting
into
ammonia
or
nitrogen
using
electric
energy.
This
saves
energy,
protects
environment,
and
an
important
technology
for
resource
recovery
water
purification.
paper
examines
recent
advances
in
electrochemical
research
analyzes
reaction
mechanism
path
as
well
influence
various
factors
on
through
thermodynamic
kinetic
principles.
Second,
catalytic
performances
transition
metal
electrocatalysts
form
single
metals,
alloys,
oxides,
composites
are
analyzed
detail,
which
lays
foundation
rational
development
new,
efficient,
stable
electrocatalysts.
Finally,
future
directions
prospects
envisioned.
