Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 19, 2024
Abstract
High‐entropy‐alloy
(HEA)
nanocrystals
hold
immense
potential
for
catalysis,
offering
virtually
unlimited
alloy
combinations
through
the
inclusion
of
at
least
five
constituent
elements
in
varying
ratios.
However,
general
and
effective
strategies
synthesizing
libraries
HEA
with
controlled
surface
atomic
structures
remain
scarce.
In
this
study,
a
transferable
strategy
developing
library
facet‐controlled
seed@HEA
seed‐mediated
growth
is
presented.
The
synthesis
core–shell
incorporating
up
to
ten
different
metallic
elements,
control
over
number
solid‐solution
layers
demonstrated.
Epitaxial
on
nanocrystal
seeds
low‐index
high‐index
facets
leads
formation
catalyst
composition‐
facet‐dependent
catalytic
activities
both
electrocatalysis
photocatalysis.
situ
synchrotron
X‐ray
absorption
spectroscopy
density‐functional
theory
calculations
are
employed
identify
active
sites
HEA,
rationalizing
high
level
achieved.
This
work
enables
facet
engineering
multi‐elemental
chemical
space
unveils
critical
needs
their
future
development
toward
catalysis.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: Jan. 22, 2025
The
H2-evolution
kinetics
play
a
pivotal
role
in
governing
the
photocatalytic
hydrogen-evolution
process.
However,
achieving
precise
regulation
of
H-adsorption
and
H-desorption
equilibrium
(Hads/Hdes)
still
remains
great
challenge.
Herein,
we
propose
fine-tuning
d-p
hybridization
strategy
to
precisely
optimize
Hads/Hdes
Ni-Bx
modified
CdS
photocatalyst
(Ni-Bx/CdS).
X-ray
absorption
fine-structure
spectroscopy
theoretical
calculations
reveal
that
increasing
B-atom
amount
cocatalyst
gradually
strengthens
orbital
interaction
between
Ni3d
B2p,
resulting
consecutive
d-band
broadening
controllable
center
on
Ni
active
sites.
above
optimization
allows
for
modulation
dynamics
Ni-Bx/CdS,
ultimately
demonstrating
remarkable
activity
13.4
mmol
g-1
h-1
(AQE
=
56.1
%).
femtosecond
transient
further
confirms
rapid
electron-transfer
Ni-Bx/CdS
photocatalyst.
This
work
provides
insights
into
optimal
design
prospective
catalysts.
A
is
proposed
sites,
H-adsorption/desorption
balance
improving
H2
evolution
efficiency.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 19, 2024
Abstract
High
entropy
materials
(HEMs)
compositing
of
at
least
five
elements
have
gained
widespread
attention
in
the
field
electrocatalysis
due
to
their
tunable
activities
and
high
stability.
These
intrinsic
properties
can
be
further
highlighted
when
size
HEMs
comes
nanoscale.
In
nanostructured
HEMs,
fascinating
including
large
composition
space,
multi‐element
synergy,
configuration
are
expected
endow
nano‐HEMs
with
excellent
catalytic
activity
stability,
thus
providing
greater
potential
for
design
advanced
electrocatalysts.
this
review,
differentiated
detail
dimensions
common
synthesis
methods
summarized.
Additionally,
from
perspective
complex
nanostructure‐performance
relationship,
applications
systems,
water‐splitting
(hydrogen
evolution
reaction
(HER),
oxygen
(OER)),
hydrogen
oxidation
(HOR),
reduction
(ORR),
carbon
dioxide
(CO
2
RR),
nitrogen
(NRR)
alcohol
(AOR)
discussed.
Finally,
main
challenges
faced
by
underscored.
This
review
is
provide
more
insights
into
understanding
developing
efficient
electrocatalytic
practical
applications.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
High-entropy
alloy
(HEA)
nanoparticles
are
rising
as
promising
catalysts
but
face
challenges
in
both
facile
synthesis
and
correlation
of
the
structure
with
properties.
Herein,
utilizing
highly
reductive
carbon-centered
isopropyl
alcohol
radicals
generated
by
UV
irradiation,
we
report
a
simple
yet
robust
wet
chemical
method
to
synthesize
HEA
under
ambient
conditions.
These
isopropanol
verified
electron
paramagnetic
resonance
spectroscopy
impose
very
large
overpotentials
reduce
diverse
metal
ions
into
five
seven
different
elements.
Specially,
PtPdIrRhAuAgCu
on
reduced
electrochemical
graphene
oxide
(rEGO)
support
(PtPdIrRhAuAgCu-rEGO)
demonstrate
superior
activity
for
hydrogen
evolution
reaction
(HER)
across
entire
pH
range,
small
11,
30,
31
mV
deliver
current
density
-10
mA
cm-2
1
M
KOH,
phosphate
buffer
saline,
0.5
H2SO4,
respectively.
The
excellent
HER
performance
PtPdIrRhAuAgCu-rEGO
surpasses
that
commercial
Pt/C
most
contemporary
literature.
Density
functional
theory
calculations
using
random
structures
mimicking
disordering
confirm
its
imply
possible
between
d-band
centers
nearest
atoms
face-centered
cubic
hollow
site.
