National Science Review,
Год журнала:
2024,
Номер
11(11)
Опубликована: Окт. 15, 2024
ABSTRACT
An
in-depth
understanding
of
electrocatalytic
mechanisms
is
essential
for
advancing
electrocatalysts
the
oxygen
evolution
reaction
(OER).
The
emerging
oxide
pathway
mechanism
(OPM)
streamlines
direct
O–O
radical
coupling,
circumventing
formation
vacancy
defects
featured
in
lattice
(LOM)
and
bypassing
additional
intermediates
(*OOH)
inherent
to
adsorbate
(AEM).
With
only
*O
*OH
as
intermediates,
OPM-driven
stand
out
their
ability
disrupt
traditional
scaling
relationships
while
ensuring
stability.
This
review
compiles
latest
significant
advances
OPM-based
electrocatalysis,
detailing
design
principles,
synthetic
methods,
sophisticated
techniques
identify
active
sites
pathways.
We
conclude
with
prospective
challenges
opportunities
electrocatalysts,
aiming
advance
field
into
a
new
era
by
overcoming
constraints.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 8, 2024
Abstract
Developing
efficient,
low‐cost
electrocatalysts
for
industrial‐level
hydrogen
production
remains
a
significant
challenge.
Here
lattice‐distorted
Ni
nanoparticles
(NPs)
encapsulated
within
nitrogen‐doped
carbon
shell
on
delignified
wood
(Ni‐NC@DWC)
are
constructed
through
chitosan‐induced
assembly
and
the
pyrolysis
process.
Experimental
theoretical
results
indicate
that
lattice
distortion
due
to
strong
metal‐support
interactions,
boosts
electron
transfer
reaction
intermediate
adsorption/desorption,
enhancing
both
urea
oxidation
(UOR)
evolution
(HER).
Interestingly,
active
center
3+
‐O
is
dynamically
cyclically
generated
during
UOR.
When
utilized
as
self‐standing
electrode
in
an
alkaline
electrolyte,
Ni‐NC@DWC
exhibits
low
potentials
of
24
mV
1.244
V
at
100
mA
cm
−2
HER
UOR,
respectively.
Moreover,
achieves
ultrasmall
cell
voltage
1.13
urea‐assisted
water
splitting
can
operate
stably
over
1000
h.
Furthermore,
when
it
self‐assembled
anion
exchange
membrane
(AEM)
electrolyzer,
requires
only
1.62
2000
industrial
operates
150
h
without
degradation,
confirming
highly
attractive
economical,
sustainable,
scalable
production.
Materials Futures,
Год журнала:
2024,
Номер
3(4), С. 042103 - 042103
Опубликована: Окт. 8, 2024
Abstract
High-entropy
oxides
(HEOs),
with
their
multi-principal-element
compositional
diversity,
have
emerged
as
promising
candidates
in
the
realm
of
energy
materials.
This
review
encapsulates
progress
harnessing
HEOs
for
conversion
and
storage
applications,
encompassing
solar
cells,
electrocatalysis,
photocatalysis,
lithium-ion
batteries,
solid
oxide
fuel
cells.
The
critical
role
theoretical
calculations
simulations
is
underscored,
highlighting
contribution
to
elucidating
material
stability,
deciphering
structure-activity
relationships,
enabling
performance
optimization.
These
computational
tools
been
instrumental
multi-scale
modeling,
high-throughput
screening,
integrating
artificial
intelligence
design.
Despite
promise,
challenges
such
fabrication
complexity,
cost,
hurdles
impede
broad
application
HEOs.
To
address
these,
this
delineates
future
research
perspectives.
include
innovation
cost-effective
synthesis
strategies,
employment
situ
characterization
micro-chemical
insights,
exploration
unique
physical
phenomena
refine
performance,
enhancement
models
precise
structure-performance
predictions.
calls
interdisciplinary
synergy,
fostering
a
collaborative
approach
between
materials
science,
chemistry,
physics,
related
disciplines.
Collectively,
these
efforts
are
poised
propel
towards
commercial
viability
new
technologies,
heralding
innovative
solutions
pressing
environmental
challenges.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 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.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 22, 2024
Understanding
the
effect
of
elements'
oxygen
affinity
is
essential
for
comprehending
high-entropy
alloys'
(HEAs)
complete
properties.
However,
origin
HEAs'
oxygen-containing
structure
and
stability
remains
poorly
understood,
primarily
due
to
their
diverse
components,
hindering
synthesis
analysis.
Herein,
O-doping
HEAs
(HEA-O)
have
demonstrated
outstanding
performance
in
electrolyzed
water
Zinc-air
batteries
which
can
be
reassembled
after
being
stable
more
than
1600
h
when
zinc
consumption
over.
The
experiment
DFT
simulation
demonstrate
that
Cr
with
strong
introduce
into
system
HEAs.
Consequently,
interstitial
oxygens
act
as
electronic
buffers
making
binding
energy
other
metal
elements
move
a
higher
level.
Additionally,
lowers
d-band
center
promoting
electrochemical
activity
increasing
vacancy
formation
energies
active
sites
leading
super
stability.
study
provides
significant
insights
design
comprehension
oxygen-doped
Abstract
The
second
3d‐transition
metal
incorporation
in
Ni‐(oxy)hydroxide
has
a
drastic
effect
on
alkaline
OER
and
alcohol
dehydrogenation
reactivity.
While
Mn
suppresses
the
OER,
it
greatly
improves
A
complete
reversal
of
reactivity
is
obtained
when
Fe
incorporated,
which
shows
better
performance
for
with
poor
role
3d‐metal
elusive
due
to
lack
systematic
mechanistic
studies.
In
this
report,
we
thoroughly
analyzed
series
M─Ni
(M
=
Fe,
Ni,
Mn)
(oxy)hydroxides
derived
from
electrochemical
activation
M‐MOF
grown
nickel
foam
its
activity
aliphatic,
benzyl
dehydrogenation.
With
help
pH‐dependence
kinetic
isotope
studies,
potential‐determining
step
(PDS)
rate‐determining
(RDS)
have
been
elucidated.
Hammett
analysis
revealed
critical
information
about
transition
state
offered
insight
into
hydrogen
atom
transfer
(HAT)
versus
hydride
(HT)
operative
various
heterobimetallic
electrocatalysts.
Further,
superior
NiMn
catalyst
PET
hydrolysate
electro‐oxidation
extended
afford
valuable
chemicals
concomitant
production
hydrogen.
