Hollow structured photocatalysts
Fangxuan Liu,
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Ziyan Liu,
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Guowei Zhou
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et al.
Acta Physico-Chimica Sinica,
Journal Year:
2025,
Volume and Issue:
unknown, P. 100071 - 100071
Published: Feb. 1, 2025
Language: Английский
Weakening O-Intermediates Adsorption Strength Over the Pd Metallene via Lewis-Acidic Site Modulation for Enhanced Oxygen Reduction
Tongfei Li,
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Tianheng Du,
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Shuya Xu
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et al.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 27, 2024
The
reasonable
design
and
modulation
of
the
electronic
properties
Pd
metallene
are
acknowledged
as
a
promising
avenue
for
enhancing
oxygen
reduction
reaction
(ORR)
in
anion
exchange
membrane
fuel
cells
(AEMFCs),
yet
they
remain
formidable
challenge.
Herein,
thin-sheet
structure
Zr-doped
(PdZr
metallene)
with
abundant
defects
is
proposed
using
facile
wet-chemical
approach
efficient
highly
durable
ORR
electrocatalysis.
Multiple
microstructural
analyses
uncover
that
orchestrated
oxophilic
regulation
PdZr
via
Lewis-acidic
Zr
site
could
concurrently
optimize
configuration
Pd,
downshift
d-band
center
and,
thus,
promote
intrinsic
activity.
Benefiting
from
unique
two-dimensional
morphology
optimization
facilitated
by
coupling
effect,
resultant
demonstrates
significantly
enhanced
electrocatalytic
performance
basic
solutions,
high
half-wave
potential
(
Language: Английский
Ligand Effect-Induced Electronic Structure Manipulation of Media-Entropy Alloy for Remarkable Stability over 50,000 Cycles in Oxygen Reduction
Sijie Chen,
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Dingli Bao,
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Luping Zhang
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et al.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 19, 2024
Modulating
the
"trade-off"
between
activity
and
durability
of
Pd-based
alloys
while
eliminating
dissolution
nonprecious
metal
element
issue
is
highly
significant
for
advancement
commercializing
anion-exchange
membrane
fuel
cells
(AEMFCs).
Herein,
by
harmonizing
composition
ligand
effects
targeting
stability
concerns
alloys,
we
propose
PdRhNi
ternary
medium-entropy-alloy
(MEA)
networks
(PdRhNi
ANs)
as
exceptionally
efficient
oxygen
reduction
reaction
(ORR)
electrocatalysts
via
effect.
The
results
theoretical
calculations
provide
compelling
evidence
that
effect
Ni
in
ANs,
which
can
endow
an
inductive
to
reshape
electronic
configuration
induce
a
reduced
energy
barrier
rate-determining
steps,
optimizes
adsorption
O-related
intermediates
lowers
d-band
center
species,
collectively
boosting
anti-CO
capacity
ORR
efficiency.
Consequently,
as-made
ANs
not
only
demonstrate
significantly
enhanced
electrocatalytic
properties
with
half-wave
potential
0.85
V
excellent
resistance
CO
toxicity,
contrast
those
commercial
Pt/C
binary
counterparts,
but
also
exhibit
negligible
decline
after
50,000
cycle
examination.
More
excitingly,
homemade
AEMFC
AN
air
cathode
delivers
higher
power
density
109
mW
cm–2,
surpassing
PdRh
AN-based
battery,
highlighting
promising
prospects
implementing
MEA
materials
engineering
environments.
Language: Английский