Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 23, 2024
Abstract
Inhibiting
the
deactivation
of
nickel‐based
catalysts
caused
by
self‐oxidation
and
competitive
adsorption
behavior
is
still
a
major
challenge
for
urea
oxidation
reaction
(UOR),
especially
under
industrial‐level
current
densities.
In
this
study,
crystalline
NiSe
2
/amorphous
NiFe‐LDH
(NiSe
/NiFe‐LDH)
heterojunction
catalyst
rationally
constructed
selective
electrocatalytic
UOR.
situ
Raman
spectra
ex
characterization
results
reveal
that
such
structure
can
tailor
impede
accumulation
NiOOH
species
during
UOR
process.
Density
function
theory
simulations
disclose
self‐driven
charge
transport
from
electron‐deficient
region
to
electron‐rich
would
induce
formation
local
electrophilic/nucleophilic
adsorb
electron‐donating
‐NH
electron‐withdrawing
C
=
O
groups,
respectively.
This
optimizes
molecules
hinders
overaccumulation
OH
−
ions
on
surface
/NiFe‐LDH,
which
beneficial
priority
occurrence
over
oxygen
evolution
(OER)
realization
high
selectivity.
Benefiting
tailored
favorable
adsorption,
/NiFe‐LDH
could
act
as
high‐selective
anode
achieve
ultrahigh
800
mAcm
−2
only
at
1.447
V.
Besides,
UV–vis
spectrophotometry
also
unveiled
has
capability
electrochemically
degrade
urea,
offering
great
promise
practical
application
potentials.
It
is
challenging
yet
highly
desirable
to
explore
high-performance
inexpensive
electrocatalysts
toward
advanced
zinc-air
batteries
(ZABs).
Herein,
a
bifunctional
oxygen
electrocatalyst
composed
of
Co9S8
incorporated
into
N-doped
porous
cross-linked
carbon
nanotubes
(denoted
as
Co9S8–NC/NTs)
reported
through
folic
acid-assisted
hydrothermal,
pyrolysis,
and
sulfurization
process.
Owing
the
synergistic
effect
nanoparticles
(NPs),
Co–Nx
active
sites,
three-dimensional
(3D)
network,
Co9S8–NC/NTs
show
enhanced
activity
small
potential
gap
0.72
V.
Moreover,
ZAB
assembled
with
serving
cathode
exhibits
satisfactory
long-term
durability
up
140
h
(840
cycles)
large
power
density
116.6
mW
cm–2.
The
present
study
offers
an
effective
strategy
for
constructing
catalysts
based
on
multielements-functionalized
rechargeable
ZABs.
Chemical Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Wastewater
from
industrial
chemical
synthesis,
agricultural
activities,
and
domestic
sewage
usually
contains
high
levels
of
nitrogenous
compounds,
endangering
environmental
health
human
well-being.
Nitrogenous
wastewater
electrolysis
(NWE),
despite
its
ecological
merits,
is
inherently
hampered
by
sluggish
kinetics.
To
improve
process
efficiency,
lower
costs,
avoid
cross-contamination
between
the
anode
cathode,
a
range
bifunctional
transition-metal
catalysts
capable
efficient
operation
at
both
electrodes
have
recently
been
developed.
This
review
outlines
progress
in
these
for
energy-saving
production
hydrogen
wastewater,
including
urea,
hydrazine,
ammonia.
It
highlights
their
dual
role
degrading
pollutants
generating
energy.
The
meticulously
introduces
key
performance
metrics
NWE
system
surveys
latest
advancements
catalysts,
along
with
catalytic
mechanisms.
culminates
detailed
summary
comparative
analysis
representative
emphasizing
electricity
consumption
efficiency.
Lastly,
existing
challenges
research
prospects
are
thoroughly
discussed.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 29, 2024
Abstract
Ni‐Mo‐based
catalysts
that
exhibit
well‐synergized
and
readily
accessible
catalytic
sites
are
ideal
for
achieving
efficient
electrocatalysis.
Herein,
the
synthesis
of
hollow
Ni
spheres
with
a
hierarchical
nanosheet
surface
modified
by
highly
dispersed
MoN
urea
electrolysis
is
reported.
This
based
on
design
Mo‐Ni
precursors
featuring
array
surface,
achieved
through
phosphomolybdic
acid
(PMo
12
)‐mediated
reconstruction
Ni‐BTC
spheres.
The
optimized
MoN‐Ni
catalyst
can
effectively
drive
both
oxidation
reaction
(UOR)
hydrogen
evolution
at
low
potentials
1.37
V
191
mV,
respectively,
current
density
100
mA
cm
−2
.
electrolytic
cell
utilizing
these
sustain
voltage
1.53
operate
continuously
over
220
h.
X‐ray
photoelectron
spectroscopy
(XPS)
functional
theory
(DFT)
analyses
demonstrate
established
built‐in
electric
field
facilitates
electron
transfer
from
to
Ni,
optimizing
d‐band
center
consequently
reducing
barrier
UOR.
In
situ
electrochemical
impedance
(EIS)
in
Fourier‐transform
infrared
indicate
promotes
formation
high‐valent
sites,
which
accelerates
UOR
eletrolysis
more
environmentally
friendly
“carbonate”
pathway.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
The
electrochemical
reduction
of
oxygen
is
pivotal
for
advancing
emerging
energy
technologies.
Precise
control
over
morphology
and
electronic
structure
essential
enhancing
catalytic
activity
stability
in
the
reaction
(ORR).
In
this
study,
a
freestanding
carbon
electrode
developed
by
in-situ
growth
nanotube
(CNT)-encapsulated
bimetallic
CoM
(M
=
Ni,
Fe,
Mn,
Cu)
nanoparticles
(NPs)
within
hierarchical
carbonized
wood
matrix
(CoM@NWCC).
hierarchically
porous
architecture
promotes
efficient
mass
transfer
during
ORR.
X-ray
photoelectron
spectroscopy
(XPS)
density
functional
theory
(DFT)
analyses
revealed
that
incorporating
metals
such
as
Cu
modulates
Co,
specifically
adjusting
distance
between
d-band
center
(E
