Chinese Journal of Chemistry,
Год журнала:
2023,
Номер
42(2), С. 119 - 128
Опубликована: Сен. 8, 2023
Comprehensive
Summary
Realizing
the
hydrogen
economy
by
water
electrolysis
is
an
attractive
approach
for
production,
while
efficient
and
stable
bifunctional
catalysts
under
high
current
densities
are
bottleneck
that
limits
half‐cell
reactions
of
splitting.
Here,
we
propose
hydrothermal
thermal
annealing
methods
robust
MoO
2
/MoNi
4
@Ru/RuO
heterogeneous
cuboid
array
electrocatalyst
with
multiplying
surface‐active
sites
depositing
a
monolayer
amount
Ru.
Benefiting
from
abundant
heterointerfaces,
electrocatalysts
effectively
drive
alkaline
splitting
superior
evolution
reaction
(HER)
oxygen
(OER)
performances.
The
synthesized
has
HER
activity,
which
realizes
working
overpotentials
48
mV
at
50
mA·cm
–2
,
further
achieving
230
industry‐level
1000
in
electrolysis.
Moreover,
it
also
showed
enhanced
OER
activity
than
commercial
RuO
small
overpotential
280
200
media.
When
building
electrolyzer
electrodes
(–)MoO
IIMoO
/
MoNi
(+),
cell
voltage
1.63
V
1.75
just
required
to
support
density
500
electrolysis,
much
lower
(–)Pt/CIIRuO
(+).
This
work
demonstrates
nanosheet
arrays
promising
candidates
industrial
applications,
providing
possibility
exploration
large
density.
Energy & environment materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 26, 2024
Achieving
high‐performance
aqueous
zinc‐ion
batteries
requires
addressing
the
challenges
associated
with
stability
of
zinc
metal
anodes,
particularly
formation
inhomogeneous
dendrites
during
cycling
and
unstable
surface
electrochemistry.
This
study
introduces
a
practical
method
for
scattering
untreated
bulk
hexagonal
boron
nitride
(h‐BN)
particles
onto
anode
surface.
During
cycling,
stabilized
fills
interstices
scattered
h‐BN,
resulting
in
more
favorable
(002)
orientation.
Consequently,
dendrite
is
effectively
suppressed,
leading
to
improved
electrochemical
stability.
The
h‐BN
symmetric
cell
configuration
maintains
10
times
longer
than
bare
cell,
lasting
500
hours.
Furthermore,
full
α‐MnO
2
cathode,
increased
H
+
ion
activity
can
alter
major
redox
kinetics
due
presence
on
anode.
shift
lowers
overall
potential,
discharge
capacity
retention
96.1%
300
cycles
at
charge/discharge
rate
0.5
A
g
−1
.
highlights
crucial
role
modification,
innovative
use
provides
effective
solution
improving
performance
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 12, 2025
Abstract
Self‐adaptive
dielectrics
(SADs),
with
the
characteristics
of
rapid
charge
dissipation
in
electric
field
distortion,
is
regarded
as
future
material
for
package
insulation
advanced
electronic
devices.
The
current
landscape
SADs
incapable
to
achieve
tunable
nonlinear
electrical
conductivity
and
threshold
strength
due
inherent
Schottky
barrier,
significantly
limiting
application
scenarios
SADs.
Here,
a
strategy
reported
construct
stepped
barrier
through
virus‐like
structures,
which
are
composed
subminiature
metal
particles
semiconductor
microspheres.
It
found
that
can
serve
capture
center
attract
free
matrix,
precisely
instructing
transfer
pathway.
barriers
between
filler,
flexibly
controlled
by
composition
particles,
endow
extra
source
conductivity.
Under
optimal
size
exhibit
prominent
reliable
adaptive
release
under
pulsed
field.
work
pioneers
breakthrough
overcoming
constraint
previously
limited
materials
enabling
unprecedented
controllability
flexibility
contributing
distinctive
perspective
development
Ni
2
P/NiMoO
x
nanocones
can
effectively
enhance
the
electrocatalytic
hydrogen
evolution
reaction
through
a
cross-scale
synergistic
effect
of
mesoscale
local
electric
field
and
atomic
scale
electron
structure.
Angewandte Chemie,
Год журнала:
2023,
Номер
136(7)
Опубликована: Дек. 28, 2023
Abstract
Even
though
grain
boundaries
(GBs)
have
been
previously
employed
to
increase
the
number
of
active
catalytic
sites
or
tune
binding
energies
reaction
intermediates
for
promoting
electrocatalytic
reactions,
effect
GBs
on
tailoring
local
chemical
environment
catalyst
surface
has
not
clarified
thus
far.
In
this
study,
a
GBs‐enriched
iridium
(GB−Ir)
was
synthesized
and
examined
alkaline
hydrogen
evolution
(HER).
Operando
Raman
spectroscopy
density
functional
theory
(DFT)
calculations
revealed
that
acid‐like
with
H
3
O
+
created
in
region
owing
electron‐enriched
Ir
atoms
at
GBs.
The
lowered
energy
barrier
water
dissociation
provided
enough
proton
promote
generation
spillover
from
away
GBs,
synergistically
enhancing
activity.
Notably,
GB−Ir
exhibited
high
HER
activity
(10
mV
@
10
mA
cm
−2
,
20
dec
−1
).
We
believe
our
findings
will
further
research
science
electrochemical
reactions.
Applied Physics Letters,
Год журнала:
2024,
Номер
125(7)
Опубликована: Авг. 12, 2024
The
alkaline
hydrogen
evolution
reaction
(HER)
for
industrial
generation
is
a
promising
way
to
achieve
intermittent
energy
storage.
However,
challenges,
such
as
the
insufficient
supply
of
adsorbed
atoms
(*H)
and
slow
bubble
dynamics,
hinder
development
HER.
Here,
we
report
cooperative
strategy
by
leveraging
both
microscopic
enhanced
electric
field
macroscopic
efficient
traffic
evolution,
demonstrated
through
NiCoP
nanotips
on
NiP
nanorods
(NiCoP-tip@NiP).
Specifically,
during
HER
process,
can
accumulate
large
number
electrons,
enhancing
Stern
layer.
This
accelerates
dissociation
water,
resulting
in
favorable
*H
Simultaneously,
confined
space
between
hinders
growth
bubbles
generated
at
tips.
Newly
formed
will
push
out
existing
bubbles,
thus
accelerating
gas
release.
As
result,
NiCoP-tip@NiP
exhibits
low
overpotential
300
mV
1000
mA
cm−2
maintains
stable
operation
over
90
h
approximately
processes.
provides
profound
insights
generation.
