ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(45), С. 16744 - 16758
Опубликована: Окт. 31, 2024
The
development
of
aqueous
zinc–iodine
(Zn–I2)
batteries
is
plagued
by
long-term
cycling
stability,
mainly
caused
limited
iodine
loading,
polyiodide
shuttle,
and
uneven
Zn2+
deposition.
Herein,
a
unique
tree-ring-like
hierarchical
structure
constructed
polyaniline
(PANI)
nanofiber
arrays
reduced
graphene
oxide
(RGO)
was
designed
to
provide
the
nanopore
array
for
prestoring
ions
confine
conversion
reaction
as
well
promote
electron
ion
transport
along
PANI
nanofibers,
thereby
enhancing
capacity
durability
Zn–I2
batteries.
Meanwhile,
sulfonic
polyacrylamide/glycerol
(SPAM/Gly)
hydrogel
electrolyte
containing
ZnI2
additive
introduced
simultaneously
inhibiting
shuttle
side
reactions
on
Zn
anode
accompanied
excellent
antifreezing
properties
flexibility.
As
result,
assembled
flexible
battery
realized
remarkable
areal
2.3
mAh·cm–2
at
0.5
mA·cm–2
(corresponding
287.5
mAh·g–1)
maximum
energy
density
2.54
mWh·cm–2
high
mass
loading
8
mg·cm–2.
Consequently,
still
exhibited
0.784
over
6000
cycles
0.98
after
200
under
−20
°C
2
mA·cm–2.
Such
device
also
maintains
steady
supply
powering
electronic
gadget
during
deformations.
ACS Materials Letters,
Год журнала:
2024,
Номер
6(7), С. 3090 - 3111
Опубликована: Июнь 20, 2024
Electrocatalytic
water
splitting
is
commonly
regarded
as
a
sustainable
and
clean
method
to
generate
hydrogen
oxygen,
which
deemed
be
efficient
for
the
utilization
of
renewable
energy.
Electrocatalysts
are
essential
components
enhance
electrochemical
efficiency
optimize
product
yield.
Hollow
micro/nanostructures
possess
large
specific
surface
areas,
multiple
voids,
tunable
chemical
compositions,
making
them
suitable
use
direct
catalysts
or
supports
reactions.
This
review
summarizes
recent
advancements
in
structural
functional
designs
micro/nanostructured
hollow
materials
electrocatalysts
an
enhanced
water-splitting
process.
We
emphasize
ideas
strategies
create
various
oxygen/hydrogen
evolution
processes.
Subsequently,
comprehensive
summary
studies
on
borides,
carbides,
oxides,
phosphides,
selenides,
sulfides,
alloys,
MXenes,
heterostructured
containing
hosts
provided.
Furthermore,
we
highlight
current
challenges
perspectives
electrocatalytic
splitting.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(49)
Опубликована: Сен. 13, 2024
Abstract
There
has
been
a
growing
interest
in
developing
catalysts
to
enable
the
reversible
iodine
conversion
reaction
for
high‐performance
aqueous
zinc‐iodine
batteries
(AZIBs).
While
diatomic
(DACs)
have
demonstrated
superior
performance
various
catalytic
reactions
due
their
ability
facilitate
synergistic
charge
interactions,
application
AZIBs
remains
unexplored.
Herein,
we
present,
first
time,
DAC
comprising
Mn−Zn
dual
atoms
anchored
on
nitrogen‐doped
carbon
matrix
(MnZn−NC)
loading,
resulting
AZIB
with
capacity
of
224
mAh
g
−1
at
1
A
and
remarkable
cycling
stability
over
320,000
cycles.
The
electron
hopping
along
Mn−N−Zn
bridge
is
stimulated
via
spin
exchange
mechanism.
This
process
broadens
Mn
3d
xy
band
width
enhances
metallic
character
catalyst,
thus
facilitating
transfer
between
intermediates.
Additionally,
increased
occupancy
within
d‐orbital
Zn
elevates
Zn's
d‐band
center,
thereby
enhancing
chemical
interactions
MnZn−NC
I‐based
species.
Furthermore,
our
mechanism
demonstrates
potential
applicability
other
Metal‐Zn−NC
DACs
spin‐polarized
atoms.
Our
work
elucidates
clear
mechanistic
understanding
provides
new
insights
into
catalyst
design
AZIBs.
Abstract
Electrochemical
nitrate
reduction
reaction
(NO
3
−
RR)
represents
a
promising
ammonia
(NH
)
production
approach
and
has
garnered
significant
attention
in
recent
years.
Owing
to
the
highly
tunable
electronic
structures
physicochemical
properties,
alloy
materials
have
emerged
as
efficient
catalysts
for
electrochemical
NO
RR.
This
review
systematically
examines
advancements
including
binary
alloys
multi‐metal
RR,
comprehensively
analyzing
their
structure,
catalytic
activity,
mechanisms
In
addition,
relationship
between
catalysts′
composition,
active
sites,
activity
are
described,
aiming
elucidate
underlying
principles
high
guide
rational
design
of
future
catalysts.
Finally,
this
addresses
challenges
proposes
directions
research
development.
