Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 10, 2025
The
electrochemical
oxygen
reduction
reaction
(ORR)
offers
an
alluring
and
sustainable
alternative
to
the
traditional
anthraquinone
process
for
hydrogen
peroxide
(H₂O₂)
synthesis.
However,
challenges
remain
in
developing
scalable
electrocatalysts
cost-effective
reactors
high-purity
H₂O₂
production.
This
study
introduces
a
simple
yet
effective
mechanical
mixing
method
fabricate
hybrid
electrocatalyst
from
oxidized
carbon
nanotubes
layered
double
hydroxides
(LDHs).
easily
accessible
low-cost
catalyst
achieves
near-perfect
Faradaic
efficiency
(∼100%)
with
low
overpotentials
of
73
mV
at
10
mA
cm⁻2
588
400
solid
electrolyte
cell.
Through
theoretical
calculations
in-situ
analyses,
we
uncover
pivotal
role
played
by
LDH
co-catalyst
fine-tuning
local
pH
catalyst/solid-electrolyte
interface
that
drives
both
activity
selectivity.
We
also
design
solid-state
reactor
using
cation-exchange
resin
(CER)
as
proton
conductor
microchannel
efficient
mass
transfer,
achieving
production
rate
5.29
mmol
h⁻¹
continuous
output
concentrations
11.8
wt.%
H₂O₂.
Scaled
industrial
area
2
×
100
cm2,
pilot
impressive
approximately
127.0
15
A,
marking
significant
advancement
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(47)
Published: Sept. 6, 2023
High
interconversion
energy
barriers,
depressive
reaction
kinetics
of
sulfur
species,
and
sluggish
Li+
transport
inhibit
the
wide
development
high-energy-density
lithium
(Li-S)
batteries.
Herein,
differing
from
random
mixture
selected
catalysts,
composite
catalyst
with
outer
delocalized
isoelectronic
heterostructure
(DIHC)
is
proposed
optimized,
enhancing
catalytic
efficiency
for
decreasing
related
barriers.
As
a
proof-of-content,
FeCoOx
Sy
composites
different
degrees
sulfurization
are
fabricated
by
regulating
atoms
ratio
between
O
S.
The
relationship
principal
mechanism
in
DIHCs
deeply
understood
electrochemical
experiments
to
situ/operando
spectral
spectroscopies
i.e.,
Raman,
XRD
UV/Vis.
Consequently,
polysulfide
conversion
Li2
S
precipitation/dissolution
strongly
demonstrate
volcano-like
various
DIHCs.
Furthermore,
-decorated
cell
delivers
high
performance
(1413
mAh
g-1
at
0.1
A
).
Under
low
electrolyte/sulfur
ratio,
loading
stabilizes
areal
capacity
6.67
cm-2
0.2
.
Impressively,
even
resting
about
17
days
possible
shuttling,
high-mass-loading
same
capacity,
showing
practical
application
improving
reaching
performance.
Small,
Journal Year:
2024,
Volume and Issue:
20(29)
Published: Feb. 13, 2024
Ruthenium
oxide
is
currently
considered
as
the
promising
alternative
to
Ir-based
catalysts
employed
for
proton
exchange
membrane
water
electrolyzers
but
still
faces
bottlenecks
of
limited
durability
and
slow
kinetics.
Herein,
a
2D
amorphous/crystalline
heterophase
ac-Cr
Small,
Journal Year:
2023,
Volume and Issue:
19(50)
Published: Aug. 25, 2023
Abstract
Active
and
stable
electrocatalysts
toward
oxygen
evolution
reaction
(OER)
are
essential
for
alkaline
water
splitting.
Herein,
an
efficient
durable
high‐valence
NiFe‐based
OER
electrocatalyst
is
developed,
featuring
a
protective
CeO
2−
x
coating
to
prevent
the
corrosion
of
carbon
substrates
during
oxidative
operation,
ensuring
excellent
catalyst
stability.
The
incorporation
also
leads
formation
Ce‐doped
NiFe
sulfide
catalyst.
Ce
modulator
enables
dynamic
transformation
into
highly
active
(oxy)hydroxide
species
with
Ni
sites
enhanced
Ni─O
covalency,
thereby
improving
its
catalytic
activity.
Accordingly,
prepared
NiFeS
2
/CeO
/CC
achieves
activity
overpotential
260
mV
at
100
mA
cm
−2
in
1.0
m
KOH.
Moreover,
current
density
187
hydrogen
reaction.
anion
exchange
membrane
electrolyzer
reached
500
1.73
V
cell
voltage
stability
h
continuous
operation.
This
study
demonstrates
promising
approach
fabrication
robust
water‐splitting
electrocatalysts.
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.
