Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 6, 2024
Abstract
The
sluggish
reaction
kinetics
of
the
anodic
oxygen
evolution
(OER)
and
inadequate
catalytic
performance
non‐noble
metal‐based
electrocatalysts
represent
substantial
barriers
to
development
anion
exchange
membrane
water
electrolyzer
(AEMWE).
This
study
performed
synthesis
a
three‐dimensional
(3D)
nanoflower‐like
electrocatalyst
(CFMO)
via
simple
one‐step
method.
substitution
Co
with
Fe
in
structure
induces
localized
oxide
path
mechanism
(LOPM),
facilitating
direct
O−O
radical
coupling
for
enhanced
O
2
evolution.
optimized
CFMO‐2
demonstrates
superior
OER
performance,
achieving
an
overpotential
217
mV
at
10
mA
cm
−2
,
alongside
exceptional
long‐term
stability
minimal
degradation
after
1000
h
operation
1.0
M
KOH.
These
properties
surpass
most
conventional
noble
electrocatalysts.
Furthermore,
assembled
AEMWE
system,
utilizing
CFMO‐2,
operates
cell
voltage
1.65
V
deliver
A
.
In
situ
characterizations
reveal
that,
addition
traditional
adsorbate
(AEM)
isolated
sites,
new
LOPM
occurred
around
bimetallic
sites.
First‐principles
calculations
confirm
greatly
reduced
energy
barriers.
work
highlights
potential
improving
design
AEMWE.
Small,
Journal Year:
2024,
Volume and Issue:
20(31)
Published: March 18, 2024
Abstract
The
oxygen
evolution
reaction
(OER)
performance
of
NiCo
LDH
electrocatalysts
can
be
improved
through
fluorine
doping.
roles
Ni
and
Co
active
sites
in
such
catalysts
remain
ambiguous
controversial.
In
addressing
the
issue,
this
study
draws
upon
molecular
orbital
theory
proposes
center
competitive
mechanism
between
Co.
doped
F‐atoms
directly
impact
valence
state
metal
atoms
or
exert
an
indirect
influence
dehydrogenation,
thereby
modulating
center.
As
are
progressively
aggregate,
e
g
orbitals
transition
from
2
to
1
,
subsequently
0
.
corresponding
elevates
+2
+3,
then
+4,
signifying
initial
increase
followed
by
a
subsequent
decrease
electrocatalytic
performance.
Furthermore,
series
F‐NiCo
synthesized
verify
occupancy
analysis,
catalytic
OER
overpotentials
303,
243,
240,
246
mV
at
current
density
10
mA
cm
−2
respectively,
which
coincides
well
with
theoretical
prediction.
This
investigation
not
only
provides
novel
mechanistic
insights
into
competition
but
also
establishes
foundation
for
design
high‐performance
catalysts.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(12), P. 4044 - 4054
Published: Jan. 1, 2024
We
propose
a
strategy
of
phase
transformation
and
electrochemical
reconstruction
to
improve
the
OER
performance
perovskite
oxides.
The
Ru
SA
-Co
3
O
4
/CoOOH
catalyst
exhibits
an
ultra-low
overpotential
175
mV
at
10
mA
cm
−2
,
superior
previously
reported
perovskite-derived
electrocatalysts.
Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
30(23)
Published: Feb. 1, 2024
A
viable
alternative
to
non-renewable
hydrocarbon
fuels
is
hydrogen
gas,
created
using
a
safe,
environmentally
friendly
process
like
water
splitting.
An
important
role
in
water-splitting
applications
played
by
the
development
of
two-dimensional
(2D)
layered
transition
metal
chalcogenides
(TMDCs),
carbides
(MXenes),
graphene-derived
2D
nanomaterials,
phosphorene,
and
hexagonal
boron
nitride.
Advanced
synthesis
methods
characterization
instruments
enabled
an
effective
application
for
improved
electrocatalytic
splitting
sustainable
production.
Enhancing
active
sites,
modifying
phase
electronic
structure,
adding
conductive
elements
metals,
forming
heterostructures,
altering
defect
state,
etc.,
can
improve
catalytic
activity
stacked
hybrid
monolayer
nanomaterials.
The
majority
global
research
focused
on
finding
safer
substitutes
petrochemical
fuels,
this
review
summarizes
recent
advancements
field
nanomaterials
industrial-scale
green
production
fuel
cell
applications.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 6, 2024
Abstract
The
sluggish
reaction
kinetics
of
the
anodic
oxygen
evolution
(OER)
and
inadequate
catalytic
performance
non‐noble
metal‐based
electrocatalysts
represent
substantial
barriers
to
development
anion
exchange
membrane
water
electrolyzer
(AEMWE).
This
study
performed
synthesis
a
three‐dimensional
(3D)
nanoflower‐like
electrocatalyst
(CFMO)
via
simple
one‐step
method.
substitution
Co
with
Fe
in
structure
induces
localized
oxide
path
mechanism
(LOPM),
facilitating
direct
O−O
radical
coupling
for
enhanced
O
2
evolution.
optimized
CFMO‐2
demonstrates
superior
OER
performance,
achieving
an
overpotential
217
mV
at
10
mA
cm
−2
,
alongside
exceptional
long‐term
stability
minimal
degradation
after
1000
h
operation
1.0
M
KOH.
These
properties
surpass
most
conventional
noble
electrocatalysts.
Furthermore,
assembled
AEMWE
system,
utilizing
CFMO‐2,
operates
cell
voltage
1.65
V
deliver
A
.
In
situ
characterizations
reveal
that,
addition
traditional
adsorbate
(AEM)
isolated
sites,
new
LOPM
occurred
around
bimetallic
sites.
First‐principles
calculations
confirm
greatly
reduced
energy
barriers.
work
highlights
potential
improving
design
AEMWE.
