Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
The
electrochemical
reduction
of
oxygen
is
pivotal
for
advancing
emerging
energy
technologies.
Precise
control
over
morphology
and
electronic
structure
essential
enhancing
catalytic
activity
stability
in
the
reaction
(ORR).
In
this
study,
a
freestanding
carbon
electrode
developed
by
in-situ
growth
nanotube
(CNT)-encapsulated
bimetallic
CoM
(M
=
Ni,
Fe,
Mn,
Cu)
nanoparticles
(NPs)
within
hierarchical
carbonized
wood
matrix
(CoM@NWCC).
hierarchically
porous
architecture
promotes
efficient
mass
transfer
during
ORR.
X-ray
photoelectron
spectroscopy
(XPS)
density
functional
theory
(DFT)
analyses
revealed
that
incorporating
metals
such
as
Cu
modulates
Co,
specifically
adjusting
distance
between
d-band
center
(E
Journal of Materials Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
Abstract
As
the
demand
for
sustainable
energy
solutions
grows,
developing
efficient
conversion
and
storage
technologies,
such
as
fuel
cells
metal-air
batteries,
is
vital.
Oxygen
Reduction
Reaction
(ORR)
a
significant
limitation
in
electrochemical
systems
due
to
its
slower
kinetics.
Although
Pt-based
catalysts
are
commonly
used
address
this
challenge,
their
high
cost
suboptimal
performance
remain
obstacles
further
development.
This
review
offers
comprehensive
overview
of
advanced
support
materials
aimed
at
improving
efficiency,
durability,
cost-effectiveness
catalysts.
By
examining
range
materials,
including
mesoporous
carbon,
graphene,
carbon
nanotubes,
metal
oxides,
clarifies
relationship
between
structural
properties
these
supports
influence
on
ORR
performance.
Additionally,
it
discusses
fundamental
characteristics
practical
applications
cells,
explores
potential
future
directions
optimizing
advance
technologies.
Future
research
could
focus
nano-engineering
composite
material
development
unlock
full
catalysts,
significantly
enhancing
economic
viability
applications.
Advanced Healthcare Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 3, 2025
Abstract
Rapid
and
accurate
recognition
of
severe
community‐acquired
pneumonia
(CAP)
would
facilitate
the
optimal
intervention.
Currently,
diagnosis
CAP
is
commonly
based
on
criteria
established
by
Infectious
Disease
Society
America
(IDSA)/American
Thoracic
(ATS),
which
include
2
primary
9
secondary
criteria,
making
process
cumbersome
time‐consuming.
Here,
a
porous
PtCu
alloy‐assisted
laser
desorption/ionization
mass
spectrometry
(LDI
MS)
designed
for
extraction
plasma
metabolic
fingerprints
(PMFs),
coupling
with
machine
learning
CAP.
The
alloys
particle
size
exhibit
excellent
sensitivity,
reproducibility,
universality
metabolite
detection,
due
to
structure,
promising
photoelectric
effect,
improved
melting
surface
structure.
Further,
nanoplatform
successfully
records
PMFs
within
seconds,
using
only
0.5
µL
native
plasma.
Machine
69
individuals
produces
diagnostic
model
an
area
under
curve
(AUC)
0.832.
Particularly,
three
biomarker
panel
demonstrates
enhanced
efficiency
(AUC
0.846),
outperforming
reported
biomarkers
0.560–0.770).
Notably,
can
be
completed
in
≈35
min.
work
affords
rapid
precise
method
management
through
analysis.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 5, 2025
Nitrogen-coordinated
metal
single
atoms
catalysts,
especially
with
M-N4
configuration
confined
within
the
carbon
matrix,
emerge
as
a
frontier
of
electrocatalytic
research
for
enhancing
sluggish
kinetics
oxygen
reduction
reaction
(ORR).
Nevertheless,
due
to
highly
planar
D4h
symmetry
in
M-N4,
their
adsorption
behavior
toward
intermediates
is
limited,
undesirably
elevating
energy
barriers
associated
ORR.
Moreover,
structural
engineering
substrate
also
poses
significant
challenges.
Herein,
inspired
by
biological
neural
network
(BNN),
reticular
nervous
system
high-speed
signal
processing
and
transmitting,
comprehensive
biomimetic
strategy
proposed
tailoring
Fe-N4
(Fe
SAs)
coupled
Fe
atomic
clusters
ACs)
active
sites,
which
are
anchored
onto
chitosan
microfibers/nanofibers-based
aerogel
(CMNCA-FeSA+AC)
continuous
conductive
channels
an
oriented
porous
architecture.
Theoretical
analysis
reveals
synergistic
effect
SAs
ACs
optimizing
electronic
structures
expediting
The
ingenious
will
shed
light
on
topology
optimization
efficient
electrocatalysts
advanced
electrochemical
conversion
devices.
Developing
efficient
heterogeneous
Fenton-like
catalysts
is
the
key
point
to
accelerating
removal
of
organic
micropollutants
in
advanced
oxidation
process.
However,
a
general
principle
guiding
reasonable
design
highly
has
not
been
constructed
up
now.
In
this
work,
total
16
single-atom
and
272
dual-atom
transition
metal/nitrogen/carbon
(TM/N/C)
for
H2O2
dissociation
were
explored
systematically
based
on
high-throughput
density
functional
theory
machine
learning.
It
was
found
that
TM/N/C
exhibited
distinct
volcano-type
relationship
between
catalytic
activity
•OH
adsorption
energy.
The
favorable
energies
range
-3.11
∼
-2.20
eV.
Three
different
descriptors,
namely,
energetic,
electronic,
structural
found,
which
can
correlate
intrinsic
properties
their
activity.
Using
energy,
stability,
activation
energy
as
evaluation
criteria,
two
CoCu/N/C
CoRu/N/C
screened
out
from
candidates,
higher
than
best
catalyst
due
synergistic
effect.
This
work
could
present
conceptually
novel
understanding
inspire
structure-oriented
viewpoint
volcano
relationship.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 6, 2024
Although
iridium-based
electrocatalysts
are
commonly
regarded
as
the
sole
stable
operating
acidic
oxygen
evolution
reaction
(OER)
catalysts
in
proton-exchange
membrane
water
electrolysis
(PEMWE)
devices,
their
exorbitant
cost
and
scarcity
severely
restrict
widespread
application.
Herein,
we
introduce
a
promising
alternative
to
iridium:
zinc-doped
ruthenium
dioxide
(TE-Zn/RuO2),
which
exhibits
remarkable
enduring
activity
for
OER.
In
situ
characterizations
elucidate
that
dynamic
cycling
of
zinc
dopants
serves
both
electron
acceptors
donors,
facilitating
activation
Ru
sites
at
low
overpotentials
while
thwarting
peroxidation
high
overpotentials,
thus
concurrently
achieving
heightened
robust
stability.
Additionally,
incorporation
induces
weakened
Ru–O
covalency,
thereby
stabling
*OOH
intermediates
instigating
sustained
adsorbate
mechanism,
dramatically
stabilizing
RuO2
lattice.
Importantly,
TE-Zn/RuO2
catalyst
an
anode
good
stability
over
300
h
water-splitting
current
500
mA
cm–2
PEMWE
device,
underscoring
its
considerable
promise
practical
applications.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
Abstract
Dual‐atom
catalysts
(DACs)
possess
tunable
electronic
structures
and
efficient
atom
utilization,
making
them
highly
promising
for
catalyzing
the
oxygen
reduction
reaction/oxygen
evolution
reaction
(ORR/OER).
However,
achieving
high
catalytic
activity
stability
both
ORR
OER
in
DACs
remains
a
challenge.
Herein,
flexible
membrane
of
porous
carbon
fiber
anchored
with
atomically
scattered
CoN
4
/FeN
dual
sites
adjacent
Co
2
Fe
/Fe
5
nanoclusters
(Co,
Fe‐DACs/NCs@PCF)
is
synthesized.
The
local
geometry
structure
sites,
which
act
as
centers
ORR/OER,
are
finely
regulated
by
neighboring
nanoclusters.
This
unique
imparts
Co,
Fe‐DACs/NCs@PCF
exceptional
durability
toward
outperforming
performance
single‐atom
containing
only
or
FeN
well
commercial
Pt/C
RuO
catalysts.
Zinc–air
battery
employing
cathode
exhibits
outstanding
stability,
maintaining
cyclability
over
1500
h,
+
air
cathode.
Theoretical
calculations
highlight
distinct
synergies
between
(Co
)
clusters
(CoN
optimize
coupling
strength
Fe(Co)─OH
at
potential‐determining
steps
thus
improve
(OER)
kinetics.
study
lays
theoretical
practical
foundation
rational
design
heterostructure
featuring
coexisting
within
fibers.
