Small,
Journal Year:
2024,
Volume and Issue:
20(34)
Published: April 18, 2024
Abstract
Optimizing
the
local
electronic
structure
of
electrocatalysts
can
effectively
lower
energy
barrier
electrochemical
reactions,
thus
enhancing
electrocatalytic
activity.
However,
intrinsic
contribution
effect
is
still
experimentally
unclear.
In
this
work,
electron
injection‐incomplete
discharge
approach
to
achieve
accumulation
(EA)
degree
on
nickel‐iron
layered
double
hydroxide
(NiFe
LDH)
proposed,
reveal
EA
toward
oxygen
evolution
reaction
(OER).
Such
NiFe
LDH
with
results
in
only
262
mV
overpotential
reach
50
mA
cm
−2
,
which
51
mV‐lower
compared
pristine
(313
mV),
and
reduced
Tafel
slope
54.8
dec
−1
than
(107.5
).
Spectroscopy
characterizations
combined
theoretical
calculations
confirm
that
near
concomitant
Vo
induce
a
narrower
gap
thermodynamic
enhance
OER
performance.
This
study
clarifies
mechanism
activity,
providing
direct
modulation
guideline
for
effective
electrocatalyst
design.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(37)
Published: March 14, 2024
Abstract
Catalytic
materials
play
crucial
roles
in
various
energy‐related
processes,
ranging
from
large‐scale
chemical
production
to
advancements
renewable
energy
technologies.
Despite
a
century
of
dedicated
research,
major
enduring
challenges
associated
with
enhancing
catalyst
efficiency
and
durability,
particularly
green
electrochemical
reactions,
remain.
Focusing
only
on
either
the
crystal
structure
or
electronic
is
deemed
insufficient
break
linear
scaling
relationship
(LSR),
which
golden
rule
for
design
advanced
catalysts.
The
discourse
this
review
intricately
outlines
essence
heterogeneous
catalysis
reactions
by
highlighting
vital
played
electron
properties.
physical
properties
charge
spin
that
govern
efficiencies
are
analyzed.
Emphasis
placed
pronounced
influence
external
fields
perturbing
LSR,
underscoring
role
plays
advancing
high‐performance
design.
culminates
proffering
insights
into
potential
applications
catalysis,
concluding
discussion
extant
inherent
limitations.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(5), P. 3640 - 3646
Published: Feb. 21, 2024
The
oxygen
evolution
reaction
(OER)
is
an
electrochemical
process
that
involves
the
spin-dependent
conversion
of
singlet
OH–/H2O
to
triplet
O2.
However,
sluggish
dynamics
associated
with
this
severely
limits
its
efficiency
in
water
splitting.
Fortunately,
utilization
a
magnetic
field
can
significantly
enhance
spin
selectivity
and
accelerate
kinetics.
Herein,
we
report
unique
strategy
regulate
polarization
NiFe
layered
double
hydroxide
(NiFe-LDH)
by
harnessing
internal
induced
built-in
core.
exchange
bias
effect
between
core
NiFe-LDH
selectively
remove
electrons
opposite
moments,
thereby
reducing
magnetoresistances
minimizing
scattering
during
electron
transport.
Benefiting
from
effect,
obtained
catalyst
exhibits
excellent
OER
performance
low
overpotential
196
mV
at
current
density
30
mA
cm–2.
Furthermore,
functional
theory
(DFT)
calculations
further
confirm
increase
hybrid
strength
Fe-3d
O-2p
orbitals
while
decreasing
adsorption
energy
reactant
intermediates,
thus
accelerating
generation
paramagnetic
oxygen.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(26)
Published: Feb. 15, 2024
Abstract
Rationally
designing
of
highly
efficient
electrocatalysts
is
critical
to
improving
hydrogen
production
by
water
electrolysis.
However,
bottlenecks
still
require
consideration
when
optimizing
the
intrinsic
performance
electrocatalysts.
Applying
appropriate
external
fields
catalytic
systems
may
effectively
overcome
such
and
enhance
catalysts.
Among
various
fields,
magnetic
field
has
received
extensive
attention
owing
its
multifunctionality,
non‐contact
nature,
non‐invasiveness,
thereby
requiring
more
research
development.
In
this
review,
recent
advances
in
field‐assisted
electrolysis
are
systematically
outlined.
Firstly,
diverse
methods
used
for
pre‐regulating
catalysts
under
including
optimized
nucleation,
induction
heating,
directed
growth,
discussed.
It
then
explores
effects
on
electrochemical
processes,
magnetothermal,
magnetohydrodynamic,
induced
electric
impact.
Then,
influences
properties
catalysts,
as
spin
polarization
reconstruction
effects,
addressed.
Finally,
a
discussion
potential
perspectives
field‐enhanced
splitting,
catalyst
design,
experimental
precision,
situ
characterization,
provided
guide
further
research.
eScience,
Journal Year:
2024,
Volume and Issue:
unknown, P. 100264 - 100264
Published: March 1, 2024
Building
highly
reactive
electrocatalysts
is
of
great
significance
for
addressing
the
energy
crisis
and
developing
green
energy.
Electrocatalytic
reactions
occur
at
interface
catalysts,
where
physicochemical
properties
catalyst
surface
play
a
dominant
role.
In
particular,
electron
spin
behavior
on
has
decisive
impact
catalytic
reaction
process.
This
review
initially
introduces
definition
methods
manipulation.
Furthermore,
we
summarize
advanced
characterization
spin.
Then,
latest
research
advancements
effect
in
oxygen
reduction
reaction,
evolution
carbon
dioxide
nitrogen
reaction.
The
mechanisms
manipulation
these
four
are
thoroughly
discussed.
Finally,
propose
key
directions
future
development
effects
field
electrocatalysis.
contributes
to
deeper
understanding
micromechanisms
electrocatalytic
reactions.
Journal of Materials Chemistry A,
Journal Year:
2023,
Volume and Issue:
11(15), P. 7802 - 7832
Published: Jan. 1, 2023
This
review
summarizes
the
current
understanding
of
magnetic
field-assisted
synthesis
catalysts
and
enhancement
catalytic
efficiency,
including
modulation
surface
electronic
structure,
electron
spin
state
regulation
mechanisms.
Precision Chemistry,
Journal Year:
2023,
Volume and Issue:
1(7), P. 395 - 417
Published: Aug. 1, 2023
The
electrocatalysis
reactions
involving
oxygen,
such
as
oxygen
evolution
reaction
(OER)
and
reduction
(ORR),
play
a
critical
role
in
energy
storage/conversion
applications,
e.g.,
fuel
cells,
metal-air
batteries,
electrochemical
water
splitting.
high
kinetic
barrier
of
the
OER/ORR
is
highly
associated
with
spin
state
interconversion
between
singlet
OH–/H2O
triplet
O2,
which
influenced
by
magnetism
catalysts.
This
Review
summarizes
recent
progress
advances
understanding
spin/magnetism-related
effects
to
develop
theory.
It
demonstrated
that
states
(low,
intermediate,
spin)
magnetic
transition
metal
catalysts
(TMCs)
can
directly
affect
barriers
tailoring
bonding
intermediates
TMCs.
Besides,
TMCs
build
spin-selective
channel
filter
electron
spins
required
for
single/triplet
O
species
during
OER/ORR.
In
this
Review,
we
introduced
many
approaches
modulating
state,
instance,
altering
crystal
field,
oxidation
active-site
ions,
morphology
What's
more,
field
drive
flip
ions
achieve
alignment
(↑↑)
(i.e.,
facilitating
polarization),
will
strengthen
selectivity
accelerating
filtration
transfer
same
direction
generation
conversion
↑O═O↑.
Importantly,
origin
enhancement
on
are
deeply
discussed,
provides
great
vision
magnetism-assisted
catalysis.
Finally,
challenges
perspectives
future
development
spin/magnetism
catalysis
presented.
expected
highlight
significance
theory
breaking
bottleneck
promote
high-efficientcy
electrocatalysts
practical
applications.
Small,
Journal Year:
2023,
Volume and Issue:
20(22)
Published: Dec. 19, 2023
Integrating
single
atoms
and
clusters
into
one
system
represents
a
novel
strategy
for
achieving
the
desired
catalytic
performance.
In
comparison
to
single-atom
catalysts,
catalysts
combining
harness
advantages
of
both,
thus
displaying
greater
potential.
Nevertheless,
constructing
single-atom-cluster
systems
remains
challenging,
fundamental
mechanism
enhancing
activity
elusive.
this
study,
directly
confined
preparation
3D
hollow
sea
urchin-like
carbon
structure
(Mn
