Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 29, 2024
Abstract
Modulating
the
spin
states
of
FeN
4
moieties
is
critical
for
enhancing
electrocatalytic
oxygen
reduction
reaction
(ORR).
In
this
study,
Ti
N
3
Cl
x
and
O
MXenes
are
synthesized
functionalized
with
iron
phthalocyanine
(FePc)
to
form
model
catalysts
well‐defined
‐Cl‐Ti
‐O‐Ti
structures,
respectively.
The
structure,
formed
within
/FePc
composite,
enables
precise
modulation
from
low
intermediate
spin,
significantly
ORR
performance.
contrast,
structure
in
shows
less
effective
state
modulation,
leading
comparatively
lower
activity.
Compared
FePc
/FePc,
demonstrates
superior
electrochemical
performance,
an
half‐wave
potential
+0.91
V
versus
RHE
doubled
power
densities
Zn–air
batteries
(214.5
mW
cm
−2
).
Theoretical
studies
confirm
that
induced
by
weak‐field
ligand‐modified
facilitate
electron
filling
antibonding
orbital
composed
Fe
3dz
2
π*
orbitals,
greatly
O₂
activation
These
findings
underscore
catalytic
properties
compared
‐O‐Ti,
advancing
understanding
state‐related
mechanisms
guiding
design
high‐performance
catalysts.
Chemical Society Reviews,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
This
review
systematically
summarizes
recent
advanced
strategies
for
manipulating
electron
spin
to
optimize
photocatalysis.
It
provides
valuable
insights
guide
future
research
on
control
enhancing
photocatalytic
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 21, 2025
Abstract
Advancing
energy
conversion
technologies
requires
cost‐efficient
electrocatalysts
for
the
oxygen
reduction
reaction
(ORR).
Iron
phthalocyanine
(FePc)
emerges
as
a
scalable
and
economical
ORR
electrocatalyst.
However,
Fe–N
4
configuration
in
FePc
still
falls
short
of
satisfied
activity
stability
under
electrocatalytic
conditions.
Here,
an
effective
f‐p‐d
(Eu–O–Fe)
gradient
orbital
coupling
strategy
is
introduced
by
integrating
with
Eu
2
O
3
(FePc/Eu
)
to
enhance
spin
state
performance
Fe
center
through
precisely
designed,
synthetic
approach.
The
Eu─O
bond
promotes
electron
delocalization
shifts
from
low‐spin
intermediate‐spin,
increasing
e
g
occupancy.
This
modification
optimizes
adsorption
oxygen‐containing
intermediates
lowers
barrier.
Notably,
increased
accelerates
charge
transfer
releasing
more
unpaired
electrons,
improving
kinetics.
Furthermore,
f‐band
serves
buffer
layer
compensation
during
ORR,
further
stabilizing
covalency
electronic
atomic
boosting
durability.
one‐batch
synthesis
produces
exceeding
300
g
FePc/Eu
,
achieving
half‐wave
potential
0.931
V
(vs
RHE)
at
cost
less
than
1/15
commercial
Pt/C.
It
demonstrates
exceptional
aluminum–air
batteries,
highlighting
its
significant
application
potential.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 20, 2024
Abstract
The
introduction
of
external
magnetic
field
has
recently
emerged
as
a
great
promising
strategy
for
largely
enhancing
the
efficiency
electrocatalytic
system,
but
it
lacks
systematic
understanding
underlying
mechanisms.
This
review
is
aimed
at
fully
illuminating
recent
research
progress
on
field‐enhanced
electrocatalysis
via
combination
theoretical
calculation
and
experiment
results.
account
begins
by
introducing
basic
systems
employed
generation,
then
possible
mechanisms
this
magnetoelectric
effect,
including
those
associated
with
Lorentz
Kelvin
forces,
magnetothermal,
magnetohydrodynamic,
spin
selectivity,
Maxwell
stress
effects.
Next,
studies
in
which
fields
are
utilized
to
enhance
performances
variety
reactions
discussed
detail.
Finally,
perspective
challenges
opportunities
facing
future
area
given.
Chemical Society Reviews,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 19, 2024
This
review
outlines
recent
advances
in
field-regulated
catalysis
and
reveals
the
key
role
of
dipole
manipulation
by
electric/magnetic/electromagnetic
fields.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Янв. 28, 2025
Abstract
Magnetic
field
effects
(MFE)
of
ferromagnetic
spin
electrocatalysts
have
attracted
significant
attention
due
to
their
potential
enhance
catalytic
activity
under
an
external
magnetic
field.
However,
no
catalysts
demonstrated
MFE
in
the
electrocatalytic
reduction
nitrate
for
ammonia
(NO
3
RR),
a
pioneering
approach
towards
NH
production
involving
conversion
from
diamagnetic
NO
−
paramagnetic
NO.
Here,
we
report
Fe-TiO
2
investigate
on
RR.
possesses
high
density
atomically
dispersed
Fe
sites
and
exhibits
intermediate-spin
state,
resulting
ordering
through
ferromagnetism.
Assisted
by
field,
achieves
Faradaic
efficiency
(FE)
up
97%
yield
24.69
mg
cat
1
at
−0.5
V
versus
reversible
hydrogen
electrode.
Compared
conditions
without
FE
is
increased
~21.8%
~
3.1
times,
respectively.
In-situ
characterization
theoretical
calculations
show
that
polarization
enhances
critical
step
hydrogenation
NOH
optimizing
electron
transfer
pathways
between
NO,
significantly
boosting
RR
activity.
Applied Physics Letters,
Год журнала:
2025,
Номер
126(4)
Опубликована: Янв. 27, 2025
Understanding
the
electronic
structure
of
catalysts
is
crucial
for
analyzing
electrocatalyst
behavior.
Here,
we
present
a
straightforward
method
to
modify
configuration
active
sites
in
nickel-iron-niobium
layered
double
hydroxides
(NiFeNb-LDHs)
via
electrochemical
reduction
(ER),
uncovering
key
factors
that
enhance
oxygen
evolution
reaction
(OER)
activity.
The
results
indicate
ER-NiFeNb-LDHs
display
excellent
OER
performance
and
long-term
stability
over
60
h
various
electrolytes
(271.99
mV@50
mA
cm−2
1M
KOH
280.56
+0.5M
NaCl).
Furthermore,
cell
voltage
two-electrode
electrolyzer
ǁ
Pt/C
achieves
current
density
50
at
an
ultra-low
1.58
V,
significantly
outperforming
commercial
RuO2ǁPt/C.
X-ray
absorption
spectroscopy,
magnetic
characterization,
functional
theory
calculations
reveal
unsaturated
coordination
environment
created
by
ER
modifies
state
distribution
between
eg
t2g
orbitals,
effectively
lowering
spin
nickel
enhancing
its
Advanced Energy and Sustainability Research,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 16, 2025
The
sluggish
kinetics
of
oxygen‐involved
electrolysis,
such
as
oxygen
evolution
reaction
(OER)
and
reduction
(ORR),
hinders
the
efficiency
pertaining
energy
conversion
process,
which
can
be
promoted
by
using
spin‐selective
materials
to
align
spin
direction
intermediates.
This
review
delivers
a
thorough
timely
overview
state‐of‐the‐art
catalysts
for
OER
ORR.
Primarily,
fundamental
principle
process
is
depicted
spin‐sensitive
pathways,
pointing
out
that
existence
spin‐polarized
adsorption
sites
necessary
development
catalysts.
Subsequently,
approaches
investigating
spin‐related
transition
during
electrocatalysis
are
introduced
reviewing
in
situ
technologies
theoretical
calculations.
Then,
reported
categorized
into
intrinsic
materials,
doping‐induced
multiple
magnetic
composites
discuss
their
application
electrocatalytic
ORR
well
mechanism
polarization.
Finally,
open
questions
prospects
this
field
concluded,
aiming
offer
clear
route
designing
novel
highly‐efficient
industrial
electrocatalysis.
