Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
This
review
focuses
on
the
synthesis
and
characterization
of
defective
electrocatalysts,
internal
correlation
between
defects
catalytic
activity,
development
application
electrocatalysts
in
various
fields.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(42)
Published: Aug. 7, 2024
Abstract
Ammonia
electrooxidation
in
aqueous
solutions
can
be
a
highly
energy‐efficient
process
producing
nitrate
and
nitrite
while
generating
hydrogen
under
ambient
conditions.
However,
the
kinetics
of
this
reaction
are
slow
role
catalyst
facilitating
ammonia
is
not
well
understood.
In
study,
high‐performance
NiOOH‐Ni
introduced
for
converting
into
with
Faraday
efficiency
up
to
90.4%
production
rate
1
mg
h
−1
cm
−2
.
By
employing
Operando
techniques,
NiOOH
elucidated
dynamic
ammonia.
Density
functional
theory
(DFT)
calculations
support
experimental
observations
reveal
mechanism
electrochemical
oxidation
nitrate.
Overall,
research
contributes
development
cost‐effective
efficient
large‐scale
electrolysis,
shedding
light
on
underlying
electrooxidation.
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(10), P. 5469 - 5478
Published: March 4, 2024
The
electrochemical
nitrogen
reduction
reaction
(eNRR)
has
emerged
as
a
promising
strategy
for
green
ammonia
synthesis.
However,
it
suffers
unsatisfactory
performance
owing
to
the
low
aqueous
solubility
of
N2
in
solution,
high
dissociation
energy
N≡N,
and
unavoidable
competing
hydrogen
evolution
(HER).
Herein,
MIL-53(Fe)@TiO2
catalyst
is
designed
synthesized
highly
efficient
eNRR.
Relative
simple
MIL-53(Fe),
achieves
2-fold
enhancement
Faradaic
efficiency
(FE)
with
an
improved
yield
rate
by
76.5%
at
−0.1
V
versus
reversible
electrode
(RHE).
After
four
cycles
electrocatalysis,
can
maintain
good
catalytic
activity,
while
MIL-53(Fe)
exhibits
significant
decrease
NH3
FE
79.8
82.3%,
respectively.
Benefiting
from
synergetic
effect
between
TiO2
composites,
Fe3+
ions
be
greatly
stabilized
during
eNRR
process,
which
hinders
deactivation
caused
ions.
Further,
charge
transfer
ability
interface
composites
improved,
thus,
activity
significantly
boosted.
These
findings
provide
insight
into
preparation
composite
electrocatalysts.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 6, 2024
Abstract
Electrocatalytic
reduction
of
nitric
oxide
(NO)
to
ammonia
(NH
3
)
represents
a
potential
solution
for
improving
the
disrupted
nitrogen
cycle
balance.
Unfortunately,
designing
efficient
electrocatalysts
NO
reaction
(NORR)
remains
notable
challenge,
especially
at
low
concentrations.
Herein,
displacement‐alloying
strategy
is
reported
successfully
induce
phase
transition
Co
nanoparticles
supported
on
carbon
nanosheets
from
face‐centered
cubic
(fcc)
hexagonal
close‐packed
(hcp)
structure
through
Ru
incorporation.
The
obtained
RuCo
alloy
with
hcp
(hcp‐RuCo)
exhibits
apparent
NORR
activity
record‐high
Faraday
efficiency
99.2%
and
an
NH
yield
77.76
µg
h
−1
mg
cat
−0.1
V
versus
reversible
hydrogen
electrode
concentration
1
vol
%,
surpassing
fcc
most
catalysts.
Density
functional
theory
calculations
reveal
that
excellent
hcp‐RuCo
can
be
attributed
optimized
electronic
site
lowered
energy
barrier
rate‐determining
step
transition.
Furthermore,
assembled
Zn‐NO
battery
using
as
cathode
achieves
power
density
2.33
mW
cm
−2
45.94
.
This
work
provides
promising
research
perspective
low‐concentration
conversion.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 29, 2025
The
electrochemical
reduction
of
nitrate
to
ammonia
offers
an
environmentally
sustainable
pathway
for
nitrogen
fixation.
However,
achieving
both
efficiency
and
selectivity
in
presents
a
formidable
challenge,
due
the
involvement
sluggish
multielectron
transfer
processes.
Herein,
successful
synthesis
spherical
Cu₂O
nanoparticles
(s-Cu₂O)
exhibiting
significant
compressive
strain
effects,
achieved
through
one-pot
method
using
gelatin
as
structural
modifier,
is
reported.
s-Cu₂O
catalyst
demonstrates
exceptional
performance
reaction
(NO3RR),
Faradaic
(FENH3)
95.07%,
92.03%,
conversion
rate
97.77%,
yield
284.83
µmol
h⁻¹
cm⁻2
at
-0.8
V
versus
reversible
hydrogen
electrode
(vs.
RHE)
production.
Structural
characterization
density
functional
theory
calculations
reveal
that
plays
critical
role
modulating
electronic
structure
catalyst,
thereby
activating
*NO
intermediate
potential
determining
step
effectively
suppressing
evolution
reaction.
Furthermore,
it
implemented
Zn-NO3
-
battery,
test
results
indicate
battery
peak
power
3.95
mW
cm-2
0.129
(vs
Zn/Zn2⁺),
illustrating
its
excellent
efficacy.
This
work
introduces
novel
strategy
rational
design
high-performance
electrocatalysts
engineering,
offering
broad
implications
energy-efficient
synthesis,
cycling.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 29, 2025
Abstract
Efficient
low‐temperature
NO
reduction
by
transition
metal‐based
catalysts
remains
a
significant
challenge.
In
this
study,
Co‐based
catalyst,
Co
0
+CoO
x
@CS,
encapsulated
carbon
microspheres
and
synthesized
via
one‐step
in
situ
hydrothermal
method,
exhibits
excellent
conversion,
exceeding
99%
at
150
°C.
X‐ray
Absorption
Fine
Structure
analysis
reveals
electronic
interactions
between
C
Co,
anchoring
nanoclusters
to
the
microspheres.
The
resulting
microporous
structure
enhances
reactant
accessibility
facilitates
N─O
bond
cleavage.
Furthermore,
13
O
isotopic
tracing
experiments
reveal
that
follows
an
ONNO
pathway,
which
adsorbed
CO
induces
dissociation
of
*
ONN
,
weakly
or
gaseous
promotes
further
decomposition
N
2
.
Specifically,
species
enhance
adsorption,
while
CoO
favor
with
oxygen
vacancy‐mediated
transfer
driving
catalytic
cycle.
This
study
presents
novel
approach
for
preparing
offers
effective
strategy
efficient
reduction.
