Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(37), P. 11632 - 11640
Published: Sept. 3, 2024
High-entropy
alloys
(HEAs)
present
both
significant
potential
and
challenges
for
developing
efficient
electrocatalysts
due
to
their
diverse
combinations
compositions.
Here,
we
propose
a
procedural
approach
that
combines
high-throughput
experimentation
with
data-driven
strategies
accelerate
the
discovery
of
HEA
hydrogen
evolution
reaction
(HER).
This
enables
rapid
preparation
arrays
various
element
composition
ratios
within
model
system.
The
intrinsic
activity
is
swiftly
screened
using
scanning
electrochemical
cell
microscopy
(SECCM),
providing
precise
composition-activity
data
sets
An
ensemble
machine
learning
(EML)
then
used
predict
database
subspace
Based
on
these
results,
two
groups
promising
catalysts
are
recommended
validated
through
actual
electrocatalytic
evaluations.
approach,
which
strategies,
provides
new
pathway
electrocatalysts.
Science,
Journal Year:
2022,
Volume and Issue:
376(6589)
Published: April 7, 2022
High-entropy
nanoparticles
have
become
a
rapidly
growing
area
of
research
in
recent
years.
Because
their
multielemental
compositions
and
unique
high-entropy
mixing
states
(i.e.,
solid-solution)
that
can
lead
to
tunable
activity
enhanced
stability,
these
received
notable
attention
for
catalyst
design
exploration.
However,
this
strong
potential
is
also
accompanied
by
grand
challenges
originating
from
vast
compositional
space
complex
atomic
structure,
which
hinder
comprehensive
exploration
fundamental
understanding.
Through
multidisciplinary
view
synthesis,
characterization,
catalytic
applications,
high-throughput
screening,
data-driven
materials
discovery,
review
dedicated
discussing
the
important
progress
unveiling
critical
needs
future
development
catalysis,
energy,
sustainability
applications.
Chemical Society Reviews,
Journal Year:
2023,
Volume and Issue:
52(23), P. 8319 - 8373
Published: Jan. 1, 2023
In
this
review,
we
provide
a
comprehensive
summary
of
recent
advances
in
the
synthesis
strategies,
design
principles,
and
characterization
technologies
high
entropy
alloys,
their
applications
various
electrocatalytic
conversion
reactions.
Carbon Energy,
Journal Year:
2022,
Volume and Issue:
4(5), P. 731 - 761
Published: July 12, 2022
Abstract
High‐entropy
alloys
(HEAs)
have
attracted
widespread
attention
as
both
structural
and
functional
materials
owing
to
their
huge
multielement
composition
space
unique
high‐entropy
mixing
structure.
Recently,
emerging
HEAs,
either
in
nano
or
highly
porous
bulk
forms,
are
developed
utilized
for
various
catalytic
clean
energy
applications
with
superior
activity
remarkable
durability.
Being
catalysts,
HEAs
possess
some
advantages,
including
(1)
a
the
discovery
of
new
catalysts
fine‐tuning
surface
adsorption
(i.e.,
selectivity),
(2)
diverse
active
sites
derived
from
random
that
especially
suitable
multistep
catalysis,
(3)
stabilized
structure
improves
durability
harsh
environments.
Benefited
these
inherent
HEA
demonstrated
performances
promising
complex
carbon
(C)
nitrogen
(N)
cycle
reactions
featuring
reaction
pathways
many
different
intermediates.
However,
design,
synthesis,
characterization,
understanding
C‐
N‐involved
extremely
challenging
because
reactions.
In
this
review,
we
present
recent
development
particularly
on
innovative
extensive
syntheses,
advanced
(in
situ)
characterizations,
C
N
looping
reactions,
aiming
provide
focused
view
how
utilize
intrinsically
important
end,
remaining
challenges
future
directions
proposed
guide
application
efficient
storage
chemical
conversion
toward
neutrality.
Energy and AI,
Journal Year:
2022,
Volume and Issue:
9, P. 100170 - 100170
Published: May 30, 2022
Proton
exchange
membrane
fuel
cells
(PEMFCs)
as
energy
conversion
devices
for
hydrogen
are
crucial
achieving
an
eco-friendly
society,
but
their
cost
and
performance
still
not
satisfactory
large-scale
commercialization.
Multiple
physical
chemical
coupling
processes
occur
simultaneously
at
different
scales
in
PEMFCs.
Hence,
previous
studies
only
focused
on
the
optimization
of
components
such
a
complex
system
separately.
In
addition,
traditional
trial-and-error
method
is
very
inefficient
breakthrough
goal.
Machine
learning
(ML)
tool
from
data
science
field.
Trained
based
datasets
built
experimental
records
or
theoretical
simulation
models,
ML
models
can
mine
patterns
that
difficult
to
draw
intuitively.
greatly
reduce
attempts
by
predicting
target
output.
Serving
surrogate
approach
could
also
computational
numerical
simulations
first-principle
multiphysics
simulations.
Related
reports
currently
trending,
has
been
proven
able
speed
up
tasks
this
field,
active
electrocatalysts,
optimizing
electrode
assembly
(MEA),
designing
efficient
flow
channels,
providing
stack
operation
strategies.
Therefore,
paper
reviews
applications
contributions
aiming
PEMFC
regarding
its
potential
bring
research
paradigm
revolution.
addition
introducing
summarizing
information
newcomers
who
interested
emerging
cross-cutting
we
look
forward
propose
several
directions
future
development.
ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(6), P. 5329 - 5339
Published: March 13, 2023
High-entropy
materials
are
an
emerging
pathway
in
the
development
of
high-activity
(electro)catalysts
because
inherent
tunability
and
coexistence
multiple
potential
active
sites,
which
may
lead
to
earth-abundant
catalyst
for
energy-efficient
electrochemical
energy
storage.
In
this
report,
we
identify
how
multication
composition
high-entropy
perovskite
oxides
(HEO)
contributes
high
catalytic
activity
oxygen
evolution
reaction
(OER),
i.e.,
key
kinetically
limiting
half-reaction
several
conversion
technologies,
including
green
hydrogen
generation.
We
compare
(001)
facet
LaCr0.2Mn0.2Fe0.2Co0.2Ni0.2O3-δ
with
parent
compounds
(single
B-site
ABO3
perovskite).
While
single
perovskites
roughly
follow
expected
volcano-type
trends,
HEO
clearly
outperforms
all
its
17
680
times
higher
currents
at
a
fixed
overpotential.
As
samples
were
grown
as
epitaxial
layer,
our
results
indicate
intrinsic
composition-function
relationship,
avoiding
effects
complex
geometries
or
unknown
surface
composition.
In-depth
X-ray
photoemission
studies
reveal
synergistic
effect
simultaneous
oxidation
reduction
different
transition
metal
cations
during
adsorption
intermediates.
The
surprisingly
OER
demonstrates
that
HEOs
highly
attractive,
material
class
electrocatalysts,
possibly
allowing
be
fine-tuned
beyond
scaling
limits
mono-
bimetallic
oxides.
Chemical Science,
Journal Year:
2023,
Volume and Issue:
14(4), P. 771 - 790
Published: Jan. 1, 2023
High-entropy
materials
(HEMs)
are
new-fashioned
functional
in
the
field
of
catalysis
owing
to
their
large
designing
space,
tunable
electronic
structure,
interesting
"cocktail
effect",
and
entropy
stabilization
effect.
Many
effective
strategies
have
been
developed
design
advanced
catalysts
for
various
important
reactions.
Herein,
we
firstly
review
so
far
optimizing
HEM-based
underlying
mechanism
revealed
by
both
theoretical
simulations
experimental
aspects.
In
light
this
overview,
subsequently
present
some
perspectives
about
development
provide
serviceable
guidelines
and/or
inspiration
further
studying
multicomponent
catalysts.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(12)
Published: Jan. 14, 2023
Multi-metal
electrocatalysts
provide
nearly
unlimited
catalytic
possibilities
arising
from
synergistic
element
interactions.
We
propose
a
polymer/metal
precursor
spraying
technique
that
can
easily
be
adapted
to
produce
large
variety
of
compositional
different
multi-metal
catalyst
materials.
To
demonstrate
this,
11
catalysts
were
synthesized,
characterized,
and
investigated
for
the
oxygen
evolution
reaction
(OER).
Further
investigation
most
active
OER
catalyst,
namely
CoNiFeMoCr,
revealed
polycrystalline
structure,
operando
Raman
measurements
indicate
multiple
sites
are
participating
in
reaction.
Moreover,
Ni
foam-supported
CoNiFeMoCr
electrodes
developed
applied
water
splitting
flow-through
electrolysis
cells
with
electrolyte
gaps
zero-gap
membrane
electrode
assembly
(MEA)
configurations.
The
proposed
alkaline
MEA-type
electrolyzers
reached
up
3
A
cm-2
,
24
h
demonstrated
no
loss
current
density
1
.
Small Science,
Journal Year:
2023,
Volume and Issue:
3(5)
Published: April 5, 2023
High‐entropy
alloys
refer
to
near‐equimolar
of
five
or
more
elements
and
are
receiving
attention
due
their
unique
physical
chemical
properties.
In
electrocatalysis,
they
serve
as
active
sites
in
multiple
elements,
favoring
the
optimized
adsorption/desorption
property
toward
target
reaction.
nanomaterials
(HENMs)
attractive
candidates
electrocatalysts
by
taking
advantage
a
high
surface‐to‐volume
ratio
tailored
composition.
This
review
begins
with
concept
high‐entropy
materials
various
strategies
for
designing
electrocatalysts.
Then,
recent
advances
HENMs
applications
(water‐splitting
reaction,
carbon
dioxide
reduction
alcohol
oxidation
etc.)
introduced
catalytic
performances.
Finally,
based
on
current
status
challenging
aspects
future
insight
advanced
electrocatalysis
discussed
proposed.
