Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 2, 2025
Abstract
Dual
single‐atom
catalysts
(DSACs)
hold
immense
potential
in
electrochemical
nitrate
(NO
3
−
)
reduction
(EcNR)
as
a
sustainable
replacement
to
the
Haber–Bosch
process
for
production
of
ammonia
(NH
).
However,
challenges
such
synthesis
complexity,
low
purity,
scalability,
and
stability
have
hindered
their
practical
application.
Herein,
rapid
scalable
method
is
introduced
stabilize
low‐cost
d
transition
metals
(Ni
Co)
DSACs
on
Ti
C
2
T
x
MXene
10
min
using
continuous‐wave
CO
‐laser
irradiation.
Ni
2+
Co
ions
are
chelated
stabilized
single
atoms
onto
an
L‐tryptophan‐modified
surface
via
metal─O
metal─N
bonds,
forming
Ni‐single
atom
catalyst
(SAC)/MXene,
Co‐SAC/MXene,
NiCo‐DSAC/MXene.
This
approach
enhances
properties,
enabling
efficient
atomic‐level
electrocatalysts.
Potential‐resolved
situ
Raman
spectroelectrochemistry
density
functional
theory
reveal
that
EcNR
proceeds
through
NO
*
,
NO,
NH,
NH
intermediates,
ultimately
final
protonation
step.
exhibits
limiting
−0.37
V,
with
identified
critical
NiCo‐DSAC/MXene
exhibited
superior
performance
1.0
M
potassium
hydroxide
sustained
multiple
cyclic
stability.
Furthermore,
this
integrated
into
Zn–NO
battery
simultaneously
removes
generates
energy,
synthesizes
.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 8, 2025
The
dual-site
synergistic
catalytic
mechanism
on
NiFeOOH
suggests
weak
adsorption
of
Ni
sites
and
strong
Fe
limited
its
activity
toward
alkaline
oxygen
evolution
reaction
(OER).
Large-scale
density
functional
theory
(DFT)
calculations
confirm
that
Co
doping
can
increase
adsorption,
while
the
metal
vacancy
reduce
adsorption.
combined
two
factors
further
modulate
atomic
environment
optimize
free
energy
oxygen-containing
intermediates,
thus
enhancing
OER
activity.
Accordingly,
we
used
Cr
vacancies
to
fabricate
an
amorphous
catalyst
VCr,Co-NiFeOOH.
It
provides
overpotential
239
mV
at
100
mA
cm–2
high
stability
over
500
h
with
a
∼98%
potential
retention.
resulting
water
electrolyzer
based
anion
exchange
membrane
(AEM)
exhibits
remarkable
performance
1
A
1.68
V
in
M
KOH.
XPS,
soft-XAS,
XANES
Bader
charge
analysis
results
reveal
regulation
local
microenvironment
valence
state
by
doping,
improving
sites.
alleviate
DFT
effect
redistribute
Ni/Fe
sites,
d-band
center
Fe,
endow
Ni–Fe
dual
barrier
rate-determining
step.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 27, 2025
MXenes,
a
novel
member
of
the
2D
material
family,
shows
promising
potential
in
stabilizing
isolated
atoms
and
maximizing
atom
utilization
efficiency
for
catalytic
applications.
This
review
focuses
on
role
MXenes
as
support
single-atom
catalysts
(SACs)
various
electrochemical
reactions,
namely
hydrogen
evolution
reaction
(HER),
oxygen
(OER),
reduction
(ORR),
carbon
dioxide
(CO2RR),
nitrogen
(NRR).
First,
state-of-the-art
characterization
synthesis
methods
MXene-supported
SACs
are
discussed,
highlighting
how
unique
structure
tunable
functional
groups
enhance
performance
pristine
contribute
to
SAs.
Then,
recent
studies
different
electrocatalytic
areas
examined,
including
experimental
theoretical
studies.
Finally,
this
discusses
challenges
outlook
field
electrocatalysis.
Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 12, 2024
MXene,
a
family
of
2D
transition
metal
carbides
and
nitrides,
presents
promising
applications
in
electrocatalysis.
Maximizing
its
large
surface
area
is
key
to
developing
efficient
non-noble-metal
catalysts
for
the
hydrogen
evolution
reaction
(HER).
In
this
study,
oxygen-functionalized
Ti
Inorganic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
11(18), P. 5957 - 5963
Published: Jan. 1, 2024
A
new-style
Ti
3
C
2
T
x
supported
Ni
nanoparticle
hybrid
was
developed
as
a
HER
electrocatalyst
under
alkaline
conditions
with
Pt-like
catalytic
activity.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 13, 2024
Abstract
2D
transition
metal
borides
(MBenes)
have
garnered
significant
attention
from
researchers
due
to
their
exceptional
electrical
conductivity,
strong
mechanical
rigidity,
excellent
dynamic
and
thermodynamic
stability,
which
stimulates
the
enthusiasm
of
for
study
MBenes.
Over
past
few
years,
extensive
research
efforts
been
dedicated
MBenes,
resulting
in
a
growing
number
synthesis
methods
being
developed.
However,
there
remains
scarcity
comprehensive
reviews
on
particularly
relation
techniques
employed.
To
address
this
gap,
review
aims
provide
summary
latest
findings
An
exhaustive
exploration
crystal
structure
types
MBenes
is
presented,
highlighting
greater
structural
diversity
compared
MXenes.
Furthermore,
recent
advancements
methodologies
provided.
The
also
delves
into
physical
chemical
properties
while
elucidating
applications
realms
energy
conversion
storage.
Lastly,
concludes
by
summarizing
offering
insights
three
angles:
synthesis,
structure‐property
relationships,
application
prospects.