Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
64(10), P. 4784 - 4790
Published: March 5, 2025
A
novel
magnetic
hollowed
CoFe@C-650
prism
catalyst
has
been
successfully
prepared
and
applied
in
the
N-alkylation
of
alcohols
amines
through
a
hydrogen
borrowing
strategy.
The
demonstrates
good
to
excellent
activities
reaction
with
broad
substrate
scope
afford
up
99%
yield
target
products.
preliminary
mechanistic
study
reveals
that
high
valent
Co
species
may
promote
adsorption
conversion
alcohols,
while
Fe
assists
hydrogenating
imine
intermediates.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: March 30, 2024
Abstract
Sufficient
integration
of
multiple
active
moieties
and
correlated
heterostructure
engineering
are
pivotal
to
optimize
the
reaction
kinetics
intrinsic
activities
heterogeneous
electrocatalysts.
Herein,
an
integrated
biphasic
nanoalloys
constructed,
encasing
in
situ
grown
interlaced
nitrogen‐doped
carbon
nanoflake
arrays
(CoFe‐NiFe/NC).
Well‐designed
CoFe‐NiFe/NC
owns
more
accessible
sites
interfacial
conjugation
effects,
jointly
accelerating
electron
transfer
mass
transport
for
multifunctional
electrocatalysis.
Such
unconventional
monolith
delivers
extraordinary
trifunctional
hydrogen
evolution
reaction,
oxygen
(overpotential
185
mV
at
10
mA
cm
−2
)
reduction
reaction.
The
superior
trifunctionality
is
rationalized
with
experimental
theoretical
elucidation.
Results
reveal
that
modulated
electronic
synergism
between
Ni,
Fe‐assisted
Co
adjacent
N‐bridged
matrix
decisively
favors
appropriate
binding
intermediates
promoted
redox
kinetics.
Consequently,
stand‐alone
cathode
contributes
high‐performance
aqueous/flexible
zinc‐air
batteries
(ZABs),
exhibiting
high
power/specific
energy
excellent
cycling
stability.
Remarkably,
CoFe‐NiFe/NC‐based
alkaline
water
electrolyzer
requires
merely
1.51
V
reach
,
a
self‐driven
splitting
system
yields
H
2
rate.
This
unique
would
open
up
opportunities
developing
high‐efficiency
catalysts
advanced
utilization
devices.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 25, 2025
The
precise
spatiotemporal
control
of
reactive
oxygen
species
(ROS)
generation
and
scavenging
remains
pivotal
for
infected
wound
healing.
However,
conventional
nanozymes
fail
to
adaptively
regulate
ROS
dynamics
across
inflammatory
proliferative
phases.
A
near-infrared
(NIR)-activated
inverse
oxide/alloy-structured
nanozyme
(Co7Fe3/ZnO@C)
is
developed,
featuring
enzymatic
cascade
activities
tune
homeostasis
through
synergistic
chemodynamic
(CDT),
photodynamic
(PDT),
photothermal
(PTT)
therapies.
orchestrates
a
self-regulated
cascade:
peroxidase
(POD)-like
activity
initially
generates
bactericidal
hydroxyl
radicals
in
acidic
wounds,
while
subsequent
NIR
triggers
hot
electron
transfer
from
Co7Fe3
ZnO,
facilitating
synchronized
superoxide
dismutase
(SOD)-like,
catalase
(CAT)-like
radical
antioxidant
capacity
(HORAC)
scavenge
residual
ROS.
This
cascaded
network
dynamically
balances
production
(POD)
(NIR-driven
SOD/CAT/HORAC),
eradicating
bacteria
resolving
inflammation.
In
vitro/vivo
studies
have
shown
that
the
proposed
method
maintaining
can
markedly
enhance
rate
healing
by
regulation
environment
within
injured
tissue
facilitation
rapid
re-epithelialization.
work
provides
an
intelligent
platform
simulates
function
natural
enzymes
constructs
reaction
strategy
balance
antibacterial
anti-inflammatory
demands
microenvironment.
The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(22), P. 5985 - 5993
Published: May 30, 2024
The
tailor-made
transition
metal
alloy-based
heterojunctions
hold
a
promising
prospect
for
the
electrocatalytic
oxygen
evolution
reaction
(OER).
Herein,
series
of
iron–cobalt
bimetallic
alloy
are
purposely
designed
and
constructed
via
newly
developed
controllable
phase
separation
engineering
strategy.
results
show
that
process
component
distribution
rely
on
molar
ratio
(Fe/Co),
indicative
content
dependent
behavior.
Theoretical
calculations
demonstrate
electronic
structure
charge
can
be
modulated
optimized,
thus
leading
to
formation
an
electron-rich
interface
layer,
which
likely
tunes
d-band
center
reduces
adsorption
energy
barrier
toward
intermediates.
As
result,
Fe0.25Co0.75/Co
heterojunction
exhibits
superior
OER
activity
with
low
overpotential
185
mV
at
10
mA
cm–2.
Moreover,
it
reach
industrial-level
current
densities
excellent
durability
in
high-temperature
high-concentration
electrolyte
(30
wt
%
KOH),
exhibiting
enormous
potential
industrial
applications.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 14, 2024
Abstract
The
construction
of
sub‐nanometer
cluster
catalysts
(<1
nm)
with
almost
complete
exposure
active
atoms
serves
as
a
promising
avenue
for
the
simultaneous
enhancement
atom
utilization
efficiency
and
specific
activity.
Herein,
core–shell
cobalt‐cerium
bimetallic
oxide
protected
by
high
coverage
Ir
clusters
(denoted
cluster@CoO/CeO
2
)
is
constructed
confined
in
situ
exsolution
strategy.
distinctive
structure
endows
enhanced
intrinsic
activity
conductivity,
facilitating
efficient
charge
transfer
full‐pH
water
splitting.
achieves
low
overpotentials
49/215,
52/390,
54/243
mV
at
10
mA
cm
−2
hydrogen
evolution
reaction/oxygen
reaction
(HER/OER)
0.5
m
H
SO
4
,
1.0
PBS,
KOH,
respectively.
small
decline
performance
after
300
h
operation
renders
it
one
most
effective
DFT
calculations
indicate
that
oriented
electron
(along
path
from
Ce
to
Co
then
Ir)
creates
an
electron‐rich
environment
surface
clusters.
reconstructed
interface
electronic
provides
optimized
intermediates
adsorption/desorption
energy
site
(for
HER)
Ir‐Co
OER),
thus
simultaneously
speeding
up
HER/OER
kinetics.
