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 Materials,
Journal Year:
2023,
Volume and Issue:
unknown
Published: Oct. 9, 2023
Abstract
Phase
transformation
of
cobalt
selenide
(CoSe
2
)
can
effectively
modulate
its
intrinsic
electrocatalytic
activity.
However,
enhancing
electroconductivity
and
catalytic
activity/stability
CoSe
still
remains
challenging.
Heterostructure
engineering
may
be
feasible
to
optimize
interfacial
properties
promote
the
kinetics
oxygen
electrocatalysis
on
a
‐based
catalyst.
Herein,
heterostructure
consisting
nitride
(CoN)
embedded
in
hollow
carbon
cage
is
designed
via
simultaneous
phase/interface
strategy.
Notably,
phase
transition
orthorhombic‐CoSe
cubic‐CoSe
(c‐CoSe
accompanied
by
situ
CoN
formation
realized
build
c‐CoSe
/CoN
heterointerface,
which
exhibits
excellent/highly
stable
activities
for
reduction/evolution
reactions
(ORR/OER).
local
coordination
environment
increase
Co‐Se/N
bond
lengths.
Theoretical
calculations
show
that
Co‐site
with
an
electronic
state
near
Fermi
energy
level
main
active
site
ORR/OER.Energetical
tailoring
d‐orbital
structure
Co
atom
incorporation
lowers
thermodynamic
barriers
ORR/OER.
Attractively,
zinc‐air
battery
‐CoN
cathode
displays
excellent
cycling
stability
(250
h)
charge/discharge
voltage
loss
(0.953/0.96
V).
It
highlights
heterointerface
provides
option
modulating
bifunctional
activity
metal
selenides
controlled
transformation.
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(22)
Published: May 23, 2023
Abstract
Manipulating
electronic
structure
of
alloy‐based
electrocatalysts
can
eagerly
regulate
its
catalytic
efficiency
and
corrosion
resistance
for
water
splitting
fundamentally
understand
the
mechanisms
oxygen/hydrogen
evolution
reactions
(OER/HER).
Herein,
metallic
Co‐assisted
Co
7
Fe
3
alloy
heterojunction
(Co
/Co)
embeds
in
a
3D
honeycomb‐like
graphitic
carbon
is
purposely
constructed
as
bifunctional
catalyst
overall
splitting.
As‐marked
/Co‐600
displays
excellent
activities
alkaline
media
with
low
overpotentials
200
mV
OER
68
HER
at
10
mA
cm
−2
.
Theoretical
calculations
reveal
redistribution
after
coupling
,
which
likely
forms
electron‐rich
state
over
interfaces
electron‐delocalized
alloy.
This
process
changes
d
‐band
center
position
/Co
optimizes
affinity
surface
to
intermediates,
thus
promoting
intrinsic
OER/HER
activities.
For
splitting,
electrolyzer
only
requires
cell
voltage
1.50
V
achieve
dramatically
retains
99.1%
original
activity
100
h
continuous
operation.
work
proposes
an
insight
into
modulation
alloy/metal
heterojunctions
explores
new
path
construct
more
competitive
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(21)
Published: Jan. 26, 2024
Abstract
Designing
efficient
multifunctional
electrocatalysts
for
water
and
urea
splitting
to
produce
green
hydrogen
presents
a
significant
yet
worthwhile
challenge.
Herein,
the
morphology
electronic
structure
of
cobalt
metaphosphate
(Co
2
P
4
O
12
)
by
vanadium
(V)
doping,
resulting
in
improved
electrocatalytic
activity
stability
evolution
reaction
(HER),
oxygen
(OER),
oxidation
(UOR)
are
simultaneously
regulated.
Theory
calculations
show
that
V‐doped
Co
(V‐Co
can
boost
kinetics
catalytic
reactions
optimizing
d
‐band
center
atoms
binding
strength
intermediates,
as
well
enhancing
density
states.
Moreover,
doping
V
into
crystalline
benefits
formation
thicker
amorphous
layer
during
process,
which
could
enhance
its
alkaline
corrosion
resistance
stability.
Additionally,
multilevel
nanostructures
V‐Co
provide
rich
active
sites
reactions.
As
result,
two‐electrode
electrolyzer
assembled
delivers
low
voltages
overall
splitting.
The
superior
performance
suggests
proposed
V‐doping
strategy
is
promising
way
regulate
catering
applications.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(30), P. 18832 - 18865
Published: Jan. 1, 2024
This
review
focuses
mainly
on
the
overall
facilitating
effect
of
heterostructures
OER
process.
The
fabrication
heterostructured
electrocatalysts
and
relationship
between
their
structures
electrocatalytic
properties
are
discussed.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(44)
Published: July 14, 2024
Abstract
Effective
integration
of
multiple
active
moieties
and
strategic
engineering
coordinated
interfacial
junctions
are
crucial
for
optimizing
the
reaction
kinetics
intrinsic
activities
heterogeneous
electrocatalysts.
Herein,
a
simple
integrated
heterostructure
biphasic
Co
0.7
Fe
0.3
/Fe
3
C
embedded
on
in
situ
grown
N‐doped
carbon
sheets
is
constructed.
Rationally
designed
CoFe/Fe
C‐T
2
owns
more
accessible
sites
junction
effects,
cooperatively
boosting
electron
mass
transfer,
needed
multifunctional
electrocatalysis.
Leveraging
synergistic
effect
dual
sites,
demonstrates
outstanding
oxygen
electrocatalytic
activity
alkaline
medium
with
an
ultra‐low
potential
gap
0.58
V,
surpassing
recently
available
state‐of‐the‐art
catalysts.
Moreover,
air‐electrode
achieves
high
peak
power
density
249
mW
cm
−2
,
large
specific
capacity
808
mAh
g
−1
excellent
cycling
stability
aqueous
Zn‐air
batteries.
Remarkably,
solid‐state
flexible
ZAB
also
exhibits
satisfactory
performance,
showcasing
open‐circuit
voltage
1.43
V
66
.
These
results
push
this
catalyst
to
top
list
non‐noble
metal‐based
electrode
materials.
This
work
offers
viable
method
using
active‐site‐uniting
strategy
create
double‐active‐site
catalysts,
which
may
find
real‐time
applications
energy
conversion/storage
devices.
