Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(48)
Published: Aug. 10, 2024
Abstract
Highly
active
Pt‐based
intermetallic
nanoparticles
(i‐NPs)
loaded
on
stable
supports
have
garnered
considerable
interest
as
promising
oxygen
reduction
reaction
(ORR)
catalysts
for
proton‐exchange‐membrane
fuel
cells
(PEMFCs).
Herein,
thermostable
tellurium
(Te)
is
vapor‐deposited
onto
commercial
conductive
carbon
to
anchor
high‐temperature‐synthesized
Pt
3
Co
i‐NPs.
Advanced
characterization
and
density
functional
theory
(DFT)
calculations
demonstrate
that
the
binding
energy
of
4f
2p
shift
positively
by
0.12
0.95
eV
after
introduction
Te
in
support,
promoting
formation
Pt─Te
bonds,
which
enhances
metal–support
interactions
(MSIs)
Co/Te‐C
(with
a
more
negative
−10.28
eV).
The
average
size
well‐dispersed
i‐NPs
(≈3.9
nm)
Te─C
considerably
smaller
than
(≈9.1
carbon.
specific
activity
decreases
only
1.5%
100,000
ultra‐long
voltage‐accelerated
cycles,
while
morphology
remains
almost
unchanged.
membrane
electrode
assembly
using
cathode
demonstrates
impressive
(power
2.32
W
cm
−2
@4
A
mass
0.50
mg
−1
@0.9
V)
robust
durability
(mass
[email protected]
V
loss
26%
30,000
cycles
with
intact
L1
2
ordered
structure)
H
–O
operation,
significantly
exceeding
DOE
2025
requirements.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
This
review
systematically
provides
various
insights
into
the
pH
effect
on
hydrogen
electrocatalysis,
and
thus
providing
a
reference
for
future
development
of
electrocatalysis
based
these
insights.
Nanoscale,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Ultrafine
Pt
3
Co
nanocatalysts
were
synthesized
via
a
‘metal-defect
confinement’
strategy,
exhibiting
small
size
and
high
ECSA.
After
annealing
ADTs,
they
showed
increase
activity
loss
(2%),
demonstrating
excellent
ORR
stability.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(22), P. 16664 - 16672
Published: Oct. 29, 2024
The
development
of
Pt-based
catalysts
with
enhanced
activity
and
stability
for
the
oxygen
reduction
reaction
(ORR)
is
crucial
fuel
cell
applications.
Pt-M
(M
=
Fe,
Co,
Ni,
Cu,
etc.)
exposed
to
prolonged
acidic
environments
in
cells
suffer
from
leaching
transition
metals,
leading
accelerated
catalyst
degradation.
Here,
we
present
a
double-shell
confinement
strategy
stabilize
ORR
by
introducing
Ti-rich
layer
beneath
Pt
skin.
This
design
aims
prevent
Fe
atoms,
thus
protecting
inner
PtFeTi
intermetallic
structure.
resistance
Ti
acid
corrosion
allows
it
act
as
physical
protective
layer,
inhibiting
stabilizing
ordered
structure
internal
intermetallic.
Density
functional
theory
calculations
support
that
can
effectively
elevate
vacancy
formation
energy
thereby
enhancing
structural
stability.
Mass
(MA)
L10-PtFe0.6Ti0.4/P–C
up
1.04
A
mgPt–1.
Even
after
30,000
potential
cycles
durability
test,
MA
decreases
only
13.5%.
As
cathode
catalyst,
achieves
peak
power
density
1.10
W
cm–2,
voltage
drop
at
0.8
cm–2
14
mV
square-wave
cycles.
These
performance
metrics
surpass
DOE
2025
target
exceed
data
many
representative
catalysts.
Moreover,
this
also
applicable
PtCo-based
PtNi-based
catalysts,
demonstrating
its
broad
applicability.
