Abstract
MXenes,
a
class
of
two‐dimensional
(2D)
transition
metal
carbides,
and
covalent
organic
frameworks
(COFs)
deliver
unique
structural
electrochemical
properties,
making
them
promising
candidates
for
energy
storage
conversion
applications.
MXenes
exhibit
excellent
conductivity
tunable
surface
chemistries,
whereas
the
COFs
provide
high
porosity
versatility.
Recent
advances
in
integrating
MXene‐COF
composites
have
revealed
their
potential
to
enhance
charge
transfer
storage/conversion
properties.
The
work
highlights
key
developments
integration,
offering
insights
into
applications
batteries
(Li‐ion,
K‐ion,
Na‐ion,
Li‐S),
supercapacitors,
electrocatalysis
(HER,
OER,
RR,
NRR,
ORRCO2),
while
also
addressing
current
challenges
future
directions
not
only
but
other
electronic
devices.
image
Abstract
Electrocatalytic
nitrogen
reduction
reaction
(NRR)
represents
a
promising
sustainable
approach
for
NH
3
synthesis.
However,
the
poor
NRR
performance
of
electrocatalysts
is
great
challenge
at
this
stage,
mainly
owing
to
their
low
activity
and
competitive
hydrogen
evolution
(HER).
Herein,
2D
ferric
covalent
organic
framework/MXene
(COF‐Fe/MXene)
nanosheets
with
controllable
hydrophobic
behaviors
are
successfully
prepared
via
multiple‐in‐one
synthetic
strategy.
The
boosting
hydrophobicity
COF‐Fe/MXene
can
effectively
repel
water
molecules
inhibit
HER
enhanced
performances.
By
virtue
ultrathin
nanostructure,
well‐defined
single
Fe
sites,
enrichment
effect,
high
hydrophobicity,
1H,1H,2H,2H‐perfluorodecanethiol
modified
hybrid
shows
yield
41.8
µg
h
−1
mg
cat.
Faradaic
efficiency
43.1%
−0.5
V
versus
RHE
in
0.1
m
Na
2
SO
4
solution,
which
vastly
superior
known
Fe‐based
catalysts
even
noble
metal
catalysts.
This
work
provides
universal
strategy
design
synthesis
non‐precious
high‐efficiency
N
.
Nano-Micro Letters,
Год журнала:
2024,
Номер
16(1)
Опубликована: Янв. 16, 2024
Abstract
Renewable
energy
driven
N
2
electroreduction
with
air
as
nitrogen
source
holds
great
promise
for
realizing
scalable
green
ammonia
production.
However,
relevant
out-lab
research
is
still
in
its
infancy.
Herein,
a
novel
Sn-based
MXene/MAX
hybrid
abundant
Sn
vacancies,
Sn@Ti
CT
X
/Ti
SnC–V,
was
synthesized
by
controlled
etching
SnC
MAX
phase
and
demonstrated
an
efficient
electrocatalyst
electrocatalytic
reduction.
Due
to
the
synergistic
effect
of
heterostructure,
existence
vacancies
highly
dispersed
active
sites,
obtained
SnC–V
exhibits
optimal
NH
3
yield
28.4
µg
h
−1
mg
cat
excellent
FE
15.57%
at
−
0.4
V
versus
reversible
hydrogen
electrode
0.1
M
Na
SO
4
,
well
ultra-long
durability.
Noticeably,
this
catalyst
represents
satisfactory
rate
10.53
home-made
simulation
device,
where
commercial
electrochemical
photovoltaic
cell
employed
power
source,
ultrapure
water
feed
stock.
The
as-proposed
strategy
potential
toward
production
terms
financial
cost
according
systematic
technical
economic
analysis.
This
work
significance
large-scale
Abstract
Ammonia
serves
as
a
crucial
chemical
raw
material
and
hydrogen
energy
carrier.
Aqueous
electrocatalytic
nitrogen
reduction
reaction
(NRR),
powered
by
renewable
energy,
has
attracted
tremendous
interest
during
the
past
few
years.
Although
some
achievements
have
been
revealed
in
aqueous
NRR,
significant
challenges
also
identified.
The
activity
selectivity
are
fundamentally
limited
activation
competitive
evolution.
This
review
focuses
on
hurdles
of
delves
into
complementary
strategies,
including
materials
design
system
optimization
(reactor,
electrolyte,
mediator).
Then,
it
introduces
advanced
interdisciplinary
technologies
that
recently
emerged
for
using
high‐energy
physics
such
plasma
triboelectrification.
With
better
understanding
corresponding
mechanisms
coming
years,
these
potential
to
be
extended
further
applications.
provides
insight
stability
different
systems.
We
then
recommend
rigorous
detailed
protocol
investigating
NRR
performance
highlight
several
research
directions
this
exciting
field,
coupling
with
applications,
situ/operando
characterizations,
theoretical
calculations.
Materials Horizons,
Год журнала:
2024,
Номер
11(18), С. 4239 - 4255
Опубликована: Янв. 1, 2024
This
review
summarizes
the
design
strategies
of
MXene-based
catalysts
for
HER,
OER,
ORR
and
NRR,
including
surface
modification,
MXene
lattice
substitution,
morphology,
defect
heterostructure
engineering.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 31, 2025
Ammonia
(NH3)
is
esteemed
for
its
attributes
as
a
carbon-neutral
fuel
and
hydrogen
storage
material,
due
to
high
energy
density,
abundant
content,
notably
higher
liquefaction
temperature
in
comparison
gas.
The
primary
method
the
synthetic
generation
of
NH3
Haber-Bosch
process,
involving
rigorous
conditions
resulting
significant
global
consumption
carbon
dioxide
emissions.
To
tackle
environmental
challenges,
exploration
innovative
green
sustainable
technologies
synthesis
imperative.
Rapid
advances
electrochemical
technology
have
created
fresh
prospects
researchers
realm
environmentally
friendly
synthesis.
Nevertheless,
intricate
intermediate
products
sluggish
kinetics
reactions
impede
progress
(EAS)
technologies.
improve
activity
selectivity
EAS,
which
encompasses
electrocatalytic
reduction
nitrogen
gas,
nitrate,
nitric
oxide,
numerous
electrocatalysts
design
strategies
been
meticulously
investigated.
Here,
this
review
primarily
delves
into
recent
obstacles
EAS
pathways,
examining
methods
boost
yield
rate
current
efficiency
via
multidimensional
structural
optimization,
while
also
exploring
challenges
outlook
EAS.
