Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 16, 2025
Abstract
Alloying
of
platinum
(Pt)
nanostructures
with
heteroelements,
commonly
including
transition‐metals
and
nonmetals,
is
an
effective
strategy
to
improve
the
electrocatalytic
performance
for
oxygen
reduction
reaction
(ORR).
However,
distinct
mechanisms
by
which
metal/nonmetal
alloying
improves
ORR
activity
remain
unclear.
Herein,
based
on
successful
porous
network
Pt
nanospheres
(NSs)
metallic
copper
(Cu)
non‐metallic
phosphorus
(P)
systematically
integrating
electrochemical
tests,
density
functional
theory
calculations,
in
situ
Raman
spectroscopy,
this
study
reveals
that
internal
Cu‐alloying
responsible
modulating
binding
strength
oxygenated
intermediates
lower
free
energy
barrier
potential‐determining
step
(PDS)
along
associative
mechanism,
while
further
surface
P‐alloying
can
transform
pathway
dissociative
PDS
has
a
quite
low
barrier.
As
result,
carbon‐supported
P/Cu
co‐alloyed
(P‐PtCu
NSs
/C)
catalyst
synthesized
confinement
growth
post‐phosphorization
demonstrates
excellent
stability
compared
commercial
Pt/C
both
half‐cells
proton
exchange
membrane
fuel
cells.
In
particular,
hydrogen
(H
2
)‐oxygen
(O
)
single
cell
P‐PtCu
/C
as
cathode
achieves
high
mass
0.52
A
mg
−1
at
voltage
0.90
V,
surpassing
U.S.
Department
Energy's
current
target.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(40)
Published: June 9, 2023
Abstract
Ammonia
borane
(AB)
is
a
promising
material
for
chemical
H
2
storage
owing
to
its
high
density
(up
19.6
wt
%).
However,
the
development
of
an
efficient
catalyst
driving
evolution
through
AB
hydrolysis
remains
challenging.
Therefore,
visible‐light‐driven
strategy
generating
was
implemented
in
this
study
using
Ni−Pt
nanoparticles
supported
on
phosphorus‐doped
TiO
(Ni‐Pt/P‐TiO
)
as
photocatalysts.
Through
surface
engineering,
P‐TiO
prepared
by
phytic‐acid‐assisted
phosphorization
and
then
employed
ideal
support
immobilizing
via
facile
co‐reduction
strategy.
Under
visible‐light
irradiation
at
283
K,
Ni
40
Pt
60
/P‐TiO
exhibited
improved
recyclability
turnover
frequency
967.8
mol
−1
min
.
Characterization
experiments
functional
theory
calculations
indicated
that
enhanced
performance
originated
from
combination
alloying
effect,
Mott–Schottky
junction
metal‐semiconductor
interface,
strong
metal‐support
interactions.
These
findings
not
only
underscore
benefits
utilizing
multipronged
effects
construct
highly
active
AB‐hydrolyzing
catalysts,
but
also
pave
path
toward
designing
high‐performance
catalysts
engineering
modulate
electronic
interactions
other
visible‐light‐induced
reactions.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(22), P. 12507 - 12593
Published: Nov. 1, 2023
Electrocatalysis
underpins
the
renewable
electrochemical
conversions
for
sustainability,
which
further
replies
on
metallic
nanocrystals
as
vital
electrocatalysts.
Intermetallic
have
been
known
to
show
distinct
properties
compared
their
disordered
counterparts,
and
long
explored
functional
improvements.
Tremendous
progresses
made
in
past
few
years,
with
notable
trend
of
more
precise
engineering
down
an
atomic
level
investigation
transferring
into
practical
membrane
electrode
assembly
(MEA),
motivates
this
timely
review.
After
addressing
basic
thermodynamic
kinetic
fundamentals,
we
discuss
classic
latest
synthetic
strategies
that
enable
not
only
formation
intermetallic
phase
but
also
rational
control
other
catalysis-determinant
structural
parameters,
such
size
morphology.
We
demonstrate
emerging
nanomaterials
potentially
advancement
energy
electrocatalysis.
Then,
state-of-the-art
characterizations
representative
electrocatalysts
emphasis
oxygen
reduction
reaction
evaluated
a
MEA
setup.
summarize
review
by
laying
out
existing
challenges
offering
perspective
future
research
directions
toward
practicing
conversions.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(3), P. 2167 - 2173
Published: Jan. 12, 2024
Due
to
the
large
multi-elemental
space
desired
for
property
screening
and
optimization,
high-entropy
alloys
(HEAs)
hold
greater
potential
over
conventional
a
range
of
applications,
such
as
structural
materials,
energy
conversion,
catalysis.
However,
relationship
between
HEA
composition
its
local
structural/elemental
configuration
is
not
well
understood,
particularly
in
noble-metal-based
nanomaterials,
hindering
design
development
nano-HEAs
conversion
catalysis
applications.
Herein,
we
determined
precise
atomic-level
elemental
arrangements
model
HEAs
composed
RhPtPdFeCo
RuPtPdFeCo
unveil
their
characteristics.
Notably,
by
changing
just
one
constituent
element
(Rh
Ru),
found
dramatic
changes
arrangement
from
complete
random
mixing
single
ordering
feature.
Additionally,
demonstrate
that
can
be
further
controlled
varying
Ru
concentration,
allowing
us
toggle
clustering
distinct
heterostructures
multicomponent
systems.
Overall,
our
study
presents
practical
approach
manipulating
atomic
structures
systems,
which
could
provide
in-depth
knowledge
mechanistically
understand
functionality
nanomaterials
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(5), P. 2917 - 2923
Published: Feb. 12, 2024
Elucidating
the
relationship
between
electrocatalytic
activity
and
surface
strain
is
pivotal
for
designing
highly
efficient
electrocatalysts
acidic
hydrogen
evolution
reaction
(HER).
However,
a
general
correlation
currently
absent
due
to
lack
of
ideal
catalytic
materials
platforms
with
well-defined
structures
components.
Herein,
we
select
L10
L12
Pt-based
intermetallic
compounds
as
model
construct
series
core–shell
catalysts
strained
Pt
skins
(IMC@Pt)
establish
HER
performance.
Density
functional
theory
calculations
were
performed
determine
degree,
d-band
center,
key
descriptor
ΔGH*
HER.
By
combining
theoretical
experimental
data,
propose
volcano-type
trend
IMC@Pt
an
apex
at
4%
compressive
strain.
In
addition,
demonstrate
class
active
durable
Among
them,
Pt3V@Pt
catalyst
exhibits
highest
intrinsic
specific
4.24
mA
cmPt–2
overpotential
20
mV,
which
4
times
higher
than
that
Pt.
This
work
provides
solid
understanding
essential
nature
PtM
alloy
can
guide
design
high-performance
water
electrolyzers.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: June 1, 2024
Abstract
H
2
O
dissociation
plays
a
crucial
role
in
solar-driven
catalytic
CO
methanation,
demanding
high
temperature
even
for
solar-to-chemical
conversion
efficiencies
<1%
with
modest
product
selectivity.
Herein,
we
report
an
oxygen-vacancy
(V
o
)
rich
CeO
catalyst
single-atom
Ni
anchored
around
its
surface
V
sites
by
replacing
Ce
atoms
to
promote
and
achieve
effective
photothermal
reduction
under
concentrated
light
irradiation.
The
photon
flux
reduces
the
apparent
activation
energy
CH
4
production
prevents
from
depletion.
defects
coordinated
Ni,
significantly
capture
of
charges
local
phonons
at
d
-impurity
orbitals,
thereby
inducing
more
activation.
presents
yield
192.75
µmol/cm
/h,
efficiency
1.14%
selectivity
~100%.
mechanistic
insights
uncovered
this
study
should
help
further
development
O-activating
catalysts
expedite
practical
utilization
technologies.
Small,
Journal Year:
2024,
Volume and Issue:
20(26)
Published: Jan. 17, 2024
The
unique
properties
of
high
entropy
alloy
(HEA)
catalysts,
particularly
their
severe
lattice
distortion
and
the
synergistic
effect
multiple
components,
endow
them
with
exceptional
multifunctional
catalytic
performance.
Herein,
it
is
revealed
for
first
time,
that
ultrasmall
PtRhNiFeCu
HEA
nanoparticles
catalyst
shows
outstanding
activity
both
hydrogen
evolution
reaction
(HER)
oxygen
reduction
(ORR).
exhibits
an
impressively
low
overpotential
13
mV
at
10
mA
cm
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 6, 2024
Abstract
Wearable
sensors
for
continuous
monitoring
of
biomarkers
in
body
fluids
have
gained
significant
attention
their
potential
disease
diagnostics
and
health
management,
but
lack
sustainable
power
supply
advanced
sensing
strategies.
Herein,
sweat
wearable
biofuel
cells
(w‐BFCs)
based
on
metal
hydrogels
are
demonstrated
with
high
output
outstanding
stability,
which
harvest
energy
directly
from
human
simultaneously
enable
self‐powered
epidermal
biomarkers.
Experimental
computational
results
elucidate
that
the
highly
porous
flexible
exhibit
superior
electrocatalytic
capabilities
oxidizing
ascorbic
acid
(AA),
a
metabolite
at
anode,
reducing
O
2
cathode.
Consequently,
assembled
AA/O
BFC
delivers
stable
output,
maximum
density
35
µW
cm
−2
an
ultralow
AA
concentration
long‐term
stability
over
30
days,
self‐powered,
sensitive
detection.
When
applied
to
skin
volunteers,
this
integrated
w‐BFC
powers
biosensor
using
as
fuel
allowing
real‐time
signal
via
smartphone.
This
work
not
only
advances
harvesting
also
paves
new
avenues
real‐time,
online
Small,
Journal Year:
2024,
Volume and Issue:
20(25)
Published: Jan. 26, 2024
Abstract
To
improve
the
sluggish
kinetics
of
hydrogen
evolution
reaction
(HER),
a
key
component
in
water‐splitting
applications,
there
is
an
urgent
desire
to
develop
efficient,
cost‐effective,
and
stable
electrocatalysts.
Strain
engineering
proving
efficient
strategy
for
increasing
catalytic
activity
This
work
presents
development
Ru‐Au
bimetallic
aerogels
by
simple
one‐step
situ
reduction‐gelation
approach,
which
exhibits
strain
effects
electron
transfer
create
remarkable
HER
stability
alkaline
environment.
The
surface
induced
segregated
structure
shifts
d
‐band
center
downward,
enhancing
catalysis
balancing
processes
water
dissociation,
OH*
adsorption,
H*
adsorption.
Specifically,
optimized
catalyst
shows
low
overpotentials
only
24.1
mV
at
current
density
10
mA
cm
−2
electrolytes,
surpassing
commercial
Pt/C.
study
can
contribute
understanding
electrocatalysts
atomic
scale.
Catalysts,
Journal Year:
2024,
Volume and Issue:
14(1), P. 57 - 57
Published: Jan. 12, 2024
An
oxygen
reduction
reaction
(ORR)
is
the
key
half
of
proton
exchange
membrane
fuel
cells
(PEMFCs),
and
highly
dependent
on
Pt-based
nanocrystals
as
core
electrocatalysts.
Despite
exceptional
ORR
activity
from
adjusting
electronic
structures
surface
or
near-surface
atoms,
several
serious
issues,
including
corrosion
carbon
supports,
preferential
leaching
active
metal
elements,
instability
low-coordinated
atoms
sintering/agglomeration
nanocrystals,
still
exist,
challenging
durability
developed
catalysts.
From
point
view
catalyst
structure
design,
in
this
review,
we
summarized
state-of-the-art
structural
regulation
strategies
for
improving
The
current
limitation
binary
catalysts
electrocatalysis
firstly
discussed,
detailed
are
further
classified
into
optimization
metal-doped
alloys,
core/shell
structures,
intermetallics
high-entropy
etc.
structure–performance
relationship
detailedly
explained,
especially
emphasizing
elimination
above
restrictions.
Finally,
existing
challenges
future
research
direction
presented,
aiming
at
practicing
PEMFC
devices
ultradurable
