ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(41), P. 28433 - 28443
Published: Oct. 4, 2024
Manipulation
of
the
spin
state
holds
great
promise
to
improve
electrochemical
activity
transition
metal-based
catalysts.
However,
underlying
relationship
between
nonplanar
metal
coordination
environment
and
states
remains
be
explored.
Herein,
we
report
precise
regulation
Fe
atomic
d-orbital
energy
level
into
an
irregular
tetrahedral
crystal
field
configuration
by
introducing
P
atoms.
With
increase
number,
magnetic
moment
decreases
linearly
from
3.8
μB
0.2
μB,
high
content
31%
5%.
Significantly,
a
volcanic
curve
Fe-based
catalysts
(Fe-N
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(27), P. 16863 - 16876
Published: Jan. 1, 2024
The
symmetric
electronic
structure
of
an
Fe
single-atom
site
catalyst
was
effectively
regulated
by
incorporating
Co–N
x
sites
and
core–shell
Co
3
7
@C
nanoparticles,
resulting
in
high
performance
towards
the
ORR
Zn–air
batteries.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 4, 2024
Abstract
Rechargeable
Zn–air
batteries
(ZABs)
hold
promise
as
the
next‐generation
energy‐storage
devices
owing
to
their
affordability,
environmental
friendliness,
and
safety.
However,
cathodic
catalysts
are
easily
inactivated
in
prolonged
redox
potential
environments,
resulting
inadequate
energy
efficiency
poor
cycle
stability.
To
address
these
challenges,
anodic
active
sites
require
multiple‐atom
combinations,
that
is,
ensembles
of
metals.
Heterogeneous
bimetallic
atomically
dispersed
(HBADCs),
consisting
heterogeneous
isolated
single
atoms
atomic
pairs,
expected
synergistically
boost
cyclic
oxygen
reduction
evolution
reactions
ZABs
tuneable
microenvironments.
This
minireview
revisits
recent
achievements
HBADCs
for
ZABs.
Coordination
environment
engineering
catalytic
substrate
structure
optimization
strategies
summarized
predict
innovation
direction
ZAB
performance
enhancement.
These
divided
into
ferrous
nonferrous
dual
with
unique
microenvironments,
including
synergistic
effects,
ion
modulation,
electronic
coupling,
activity.
Finally,
conclusions
perspectives
relating
future
challenges
opportunities
provided
optimise
SusMat,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 16, 2025
ABSTRACT
The
quest
for
dynamic
and
cost‐effective
electrocatalysts
to
substitute
carbon‐supported
platinum
(Pt)
in
alkaline
hydrogen
evolution
reaction
(HER)
remains
a
pressing
challenge.
incorporation
of
transition
metal
atoms
through
electron
donation
spin
regulation
dominates
the
HER
performance
Pt
nanoparticles.
Herein,
we
demonstrate
that
Co‐N
coordination
was
utilized
regulate
stabilize
chemical
microenvironment
nanoparticles
fabricate
hybrid
(Pt/CoNC).
resultant
Pt/CoNC
delivers
ultralow
overpotentials
15.2
171.2
mV
at
current
densities
10
100
mA
cm
−2
,
surpassing
commercial
Pt/C.
poisoning
tests,
where
η
values
depict
negative
shifts
161
13
by
potassium
thiocyanide
(KSCN)
ethylenediaminetetraacetic
acid
disodium
(EDTA),
suggest
combined
impact
on
HER,
with
playing
decisive
role.
magnetic
characterization
density
diagrams
reveal
induces
higher
state
Co
2+
creating
wider
spin‐related
channel
Pt.
Moreover,
effectively
modifies
electronic
structure
Pt,
thereby
reducing
energy
barriers
H
2
O
dissociation
(from
0.41
−0.22
eV)
generation
−0.35
0.03
eV).
This
finding
provides
insights
advanced
regulating
modulating
interfacial
transfer.
