The
electrocatalytic
reduction
reaction
of
nitrate
(NO3RR)
is
anticipated
to
convert
nitrogen-containing
pollutants
into
valuable
ammonia
products.
Copper-based
catalysts
have
received
great
attention
because
their
good
performance
in
the
NO3RR
due
strong
binding
energy
with
*NO3
intermediates.
However,
poor
H2O
dissociation
ability
Cu
unable
provide
H•
time
for
hydrogenation
NOx,
thus
hindering
electroreduction
NO3-.
Herein,
we
designed
a
shell-core
nanocube
electrocatalyst
Cu2O@Ni(OH)2-x
(x
represents
molar
ratio
Ni/Cu)
using
liquid
phase
combined
etching
and
precipitation
method
NO3RR.
Due
synergistic
effect
between
activation
excellent
Ni(OH)2,
Cu2O@Ni(OH)2-3.3%
shows
an
impressive
yield
rate
(557.9
μmol
h-1
cm-2)
Faradaic
efficiency
(97.4%)
at
-0.35
V
vs.
RHE.
Operando
Raman
Auger
electron
spectroscopy
observe
Cu2O
during
process.
Density
functional
theory
calculations
paramagnetic
resonance
analysis
reveals
that
Ni(OH)2
can
lower
barrier
dissociation,
thereby
promoting
generation
accelerating
*NO
This
research
provides
efficient
Cu-based
catalyst
reducing
NO3-
may
motivate
development
effective
electrocatalysts
further
experimentation.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 22, 2024
Abstract
Reconstruction
of
catalysts
is
now
well
recognized
as
a
common
phenomenon
in
electrocatalysis.
As
the
reconstructed
structure
may
promote
or
hamper
electrochemical
performance,
how
to
achieve
designed
active
surface
for
highly
enhanced
catalytic
activity
through
reconstruction
needs
be
carefully
investigated.
In
this
review,
genesis
and
effects
various
processes,
such
hydrogen
evolution
reaction
(HER),
oxygen
(OER),
carbon
dioxide
reduction
(CO
2
RR),
nitrate
(NO
3
RR)
are
first
described.
Then,
strategies
optimizing
reconstruction,
valence
states
control,
phase
retention,
engineering,
poisoning
prevention
comprehensively
discussed.
Finally,
general
rules
optimization
summarized
give
perspectives
future
study.
It
believed
that
review
shall
provide
deep
insights
into
electrocatalytic
mechanisms
guide
design
pre‐catalysts
with
improved
activity.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 6, 2024
Abstract
Ammonia,
as
a
high‐energy‐density
carrier
for
hydrogen
storage,
is
in
great
demand
worldwide.
Electrocatalytic
nitrate
reduction
reaction
(NO
3
RR)
provides
green
NH
production
process.
However,
the
complex
pathways
NO
RR
to
and
difficulty
controlling
intermediate
products
limit
Herein,
by
incorporating
atomic‐level
bismuth
(Bi)
into
CuCo
2
O
4
hollow
carbon
nanofibers,
catalytic
activity
of
electrocatalyst
enhanced.
The
maximum
Faradaic
efficiency
Bi
1
‐CuCo
95.53%,
with
an
yield
448.74
µmol
h
−1
cm
−2
at
−0.8
V
versus
RHE.
Density
Functional
Theory
calculations
show
that
presence
lowers
barrier
hydrogenation
step
from
*NO
H,
while
promoting
mass
transfer
on
release
*NH
reactivation
surface‐active
sites.
Differential
charge
density
also
after
doping,
supplied
catalyst
−
increases
0.62
0.72
e
‐
,
thus
reasoned
enhanced
activity.
established
nitrate‐Zn
battery
shows
energy
2.81
mW
implying
potential
application.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(44)
Published: Aug. 7, 2024
Abstract
Electrocatalytic
nitrate
(NO
3
−
)
reduction
to
ammonia
(NRA)
offers
a
promising
pathway
for
synthesis.
The
interfacial
electronic
interactions
(IEIs)
can
regulate
the
physicochemical
capabilities
of
catalysts
in
electrochemical
applications,
while
impact
IEIs
on
electrocatalytic
NRA
remains
largely
unexplored
current
literature.
In
this
study,
high‐efficiency
electrode
Ag‐modified
Co
O
4
(Ag
1.5
Co/CC)
is
prepared
neutral
media,
exhibiting
an
impressive
conversion
rate
96.86
%,
Faradaic
efficiency
96.11
and
selectivity
~100
%.
Notably,
intrinsic
activity
Ag
Co/CC
~81
times
that
nanoparticles
(Ag/CC).
Multiple
characterizations
theoretical
computations
confirm
presence
between
,
which
stabilize
CoO
6
octahedrons
within
significantly
promote
adsorption
reactants
as
well
intermediates
2
NO),
suppressing
Heyrovsky
step,
thereby
improving
electroreduction
efficiency.
Furthermore,
our
findings
reveal
synergistic
effect
different
active
sites
enables
tandem
catalysis
NRA:
NO
predominantly
occurs
at
tends
hydrogenate
sites.
This
study
valuable
insights
development
high‐performance
electrocatalysts.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 6, 2024
Abstract
Photocatalytic
CO
2
reduction
reaction
(CO
RR)
into
high‐value‐added
fuels
has
received
significant
attention,
yet
multiple
electron
and
proton
processes
involved
in
RR
result
low
selectivity.
Herein,
a
strategy
involving
oxygen
vacancies
(Ovs)‐enriched
Bi
MoO
6
coated
on
ZIF‐67‐derived
Co
3
O
4
to
construct
well‐defined
core‐shell
nanocage
is
developed,
which
drives
effective
photoconversion
CH
with
nearly
100%
selectivity
high
apparent
quantum
efficiency
of
2.5%
at
420
nm
pure
water
under
simulated
irradiation.
Theoretical
calculations
experiments
exhibit
that
the
potential
difference
stemming
from
built‐in
electric
field
provides
guarantee
for
occurring
H
oxidation
set
.
Numerous
exposed
Ovs
formed
Bi─O
bond
by
ethylene
glycol
mediated
approach
promotes
adsorption
charge
separation
efficiency,
can
optimize
kinetics
thermodynamics,
facilitating
hydrogenation
key
intermediate
*CO
generate
This
work
new
controlled
vacancy
generation
photocatalysts
achieve
high‐performance
methanation.
Coordination Chemistry Reviews,
Journal Year:
2024,
Volume and Issue:
518, P. 216061 - 216061
Published: July 8, 2024
The
pervasive
contamination
of
industrial,
domestic,
and
agricultural
wastewater
with
nitrate
poses
profound
ecological
public
health
risks.
Traditional
methods
for
remediating
nitrate-laden
water
face
formidable
challenges
due
to
its
high
solubility
stability.
However,
a
promising
solution
emerges
in
the
form
electrochemical
reduction
(eNO3RR),
offering
both
efficient
removal
valuable
ammonia
generation
sustainable
manner.
This
review
explores
burgeoning
field
eNO3RR,
focusing
on
recent
advancements
utilizing
porous
crystalline
framework
materials
−
metal–organic
frameworks
(MOFs)
covalent-organic
(COFs)
as
novel
class
electrocatalysts.
These
innovative
exhibit
unique
properties
such
adjustable
porosity,
diverse
structures,
tunable
pore
sizes,
well-defined
active
sites,
making
them
ideal
candidates
enhancing
efficiency
selectivity
under
ambient
conditions.
By
dissecting
structure–activity
relationship
inherent
MOF/COF-based
electrocatalysts,
this
aims
provide
comprehensive
understanding
their
role
driving
conversion
NO3−
NH3.
Moreover,
it
identifies
current
proposes
future
prospects
leveraging
these
advanced
pollutants,
glimpse
into
greener
more
effective
approach
remediation
resource
recovery.
