Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 26, 2024
Abstract
High
temperature
polymer
electrolyte
membrane
fuel
cells
(HT‐PEMFCs)
have
garnered
significant
attention
due
to
their
expanded
range
of
hydrogen
sources
and
simplified
management
systems.
However,
the
frequent
start‐up
shut‐down
(SU/SD)
caused
starvation
operation
condition
seriously
deteriorates
performance
lifetime
cell.
In
this
manuscript,
VO
2
was
incorporated
in
anode
restrain
electrode.
Under
condition,
insulative
would
reversibly
transform
into
metallic
H
x
by
intercalating
hydrogen,
can
automatically
release
which
could
act
as
buffer
suppress
reverse‐current
degradation.
After
release,
generated
insulating
prevent
side
reactions
during
starvation.
Compared
traditional
Pt
anode,
electrode
with
showed
much
higher
output
power
greatly
improved
durability
after
This
work
demonstrates
situ
reversible
storage/release‐controlled
metal‐insulator
phase
transition
strategy
enhance
cells.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Авг. 21, 2024
The
insufficient
availability
and
activity
of
interfacial
water
remain
a
major
challenge
for
alkaline
hydrogen
evolution
reaction
(HER).
Here,
we
propose
an
"on-site
disruption
near-site
compensation"
strategy
to
reform
the
bonding
network
via
deliberate
cation
penetration
catalyst
support
engineering.
This
concept
is
validated
using
tip-like
bimetallic
RuNi
nanoalloys
planted
on
super-hydrophilic
high-curvature
carbon
nanocages
(RuNi/NC).
Theoretical
simulations
suggest
that
tip-induced
localized
concentration
hydrated
K+
facilitates
optimization
dynamics
intermediate
adsorption.
In
situ
synchrotron
X-ray
spectroscopy
endorses
H*
spillover-bridged
Volmer‒Tafel
mechanism
synergistically
relayed
between
Ru
Ni.
Consequently,
RuNi/NC
exhibits
low
overpotential
12
mV
high
durability
1600
h
at
10
mA
cm‒2
HER,
demonstrates
performance
in
both
electrolysis
chlor-alkali
electrolysis.
offers
microscopic
perspective
design
manipulation
local
structure
toward
enhanced
HER
kinetics.
A
with
optimized
H2
reported.
designed
shows
catalytic
by
achieving
13.6-fold
higher
mass
than
Pt/C.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(27)
Опубликована: Март 1, 2024
Abstract
The
development
of
stable
and
efficient
electrocatalysts
for
overall
freshwater/seawater
water‐splitting
has
received
significant
attention.
In
this
study,
the
fabrication
electrocatalytic
properties
phosphorus‐enriched
PtP
2
dispersed
on
CoP
(PtP
/CoP)
HER
OER
in
both
alkaline
fresh/seawater
media
are
described.
Physical
characterization
density
functional
theory
calculations
reveal
that
strong
electronic
interfacial
interactions
between
optimized
reaction
kinetics
by
regulating
adsorption/desorption
intermediates
cleavage
reactants.
Additionally,
operando
electrochemical
impedance
spectroscopy
reveals
/CoP
significantly
decreased
phase
angle
with
increasing
applied
potential
compared
CoP,
demonstrating
construction
heterostructure
provides
a
faster
charge
transfer
surface
inner
layer.
Notably,
catalyst
only
requires
overpotentials
101
298
mV
to
achieve
benchmark
100
mA
cm
−2
freshwater
OER.
Moreover,
prepared
featured
108
330
an
seawater
electrolyte.
Furthermore,
high‐efficiency
water
electrolysis
operation
can
be
achieved
using
as
anode
cathode
(1.63
V@100
)
coupled
satisfactory
durability.
This
finding
deeper
comprehension
interaction
Pt‐less
compounds
matrix
electrocatalysis
bifunctional
electrocatalysts.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(28)
Опубликована: Апрель 29, 2024
Abstract
The
alkaline
oxygen
evolution
reaction
(OER)
is
a
promising
avenue
for
producing
clean
fuels
and
storing
intermittent
energy.
However,
challenges
such
as
excessive
OH
−
consumption
strong
adsorption
of
oxygen‐containing
intermediates
hinder
the
development
OER.
In
this
study,
we
propose
cooperative
strategy
by
leveraging
both
nano‐scale
atomically
local
electric
fields
OER,
demonstrated
through
synthesis
Mn
single
atom
doped
CoP
nanoneedles
(Mn
SA‐CoP
NNs).
Finite
element
method
simulations
density
functional
theory
calculations
predict
that
field
enriches
around
catalyst
surface,
while
improves
*O
desorption.
Experimental
validation
using
in
situ
attenuated
total
reflection
infrared
Raman
spectroscopy
confirms
effectiveness
fields.
NNs
exhibit
an
ultra‐low
overpotential
189
mV
at
10
mA
cm
−2
stable
operation
over
100
hours
~100
during
This
innovative
provides
new
insights
enhancing
performance
energy
conversion
reactions.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(28)
Опубликована: Апрель 29, 2024
Abstract
The
alkaline
oxygen
evolution
reaction
(OER)
is
a
promising
avenue
for
producing
clean
fuels
and
storing
intermittent
energy.
However,
challenges
such
as
excessive
OH
−
consumption
strong
adsorption
of
oxygen‐containing
intermediates
hinder
the
development
OER.
In
this
study,
we
propose
cooperative
strategy
by
leveraging
both
nano‐scale
atomically
local
electric
fields
OER,
demonstrated
through
synthesis
Mn
single
atom
doped
CoP
nanoneedles
(Mn
SA‐CoP
NNs).
Finite
element
method
simulations
density
functional
theory
calculations
predict
that
field
enriches
around
catalyst
surface,
while
improves
*O
desorption.
Experimental
validation
using
in
situ
attenuated
total
reflection
infrared
Raman
spectroscopy
confirms
effectiveness
fields.
NNs
exhibit
an
ultra‐low
overpotential
189
mV
at
10
mA
cm
−2
stable
operation
over
100
hours
~100
during
This
innovative
provides
new
insights
enhancing
performance
energy
conversion
reactions.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 7, 2024
The
growing
demand
for
renewable
energy
sources
has
accelerated
a
boom
in
research
on
new
battery
chemistries.
Despite
decades
of
development
various
types,
including
lithium-ion
batteries,
their
suitability
grid-scale
storage
applications
remains
imperfect.
In
recent
years,
rechargeable
hydrogen
gas
batteries
(HGBs),
utilizing
catalytic
electrode
as
anode,
have
attracted
extensive
academic
and
industrial
attention.
HGBs,
facilitated
by
appropriate
catalysts,
demonstrate
notable
attributes
such
high
power
density,
capacity,
excellent
low-temperature
performance,
ultralong
cycle
life.
This
review
presents
comprehensive
overview
four
key
aspects
pertaining
to
HGBs:
fundamentals,
principles,
materials,
applications.
First,
detailed
insights
are
provided
into
electrodes,
encompassing
electrochemical
mechanisms,
advancements
structural
considerations
design.
Second,
an
examination
future
prospects
cathode
material
compatibility,
both
current
potential
summarized.
Third,
other
components
engineering
HGBs
elaborated,
cell
stack
design
pressure
vessel
Finally,
techno-economic
analysis
outlook
offers
the
status
indicating
orientation
further
application
advancements.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 13, 2025
Abstract
Hydrogen
evolution
reaction
(HER),
as
one
of
the
most
advanced
methods
for
green
production
hydrogen,
is
greatly
impeded
by
inefficient
mass
transfer.
Here
we
present
an
efficiently
reactant
enriched
and
traffic
system
integrating
high‐curvature
Pt
nanocones
with
3D
porous
TiAl
framework
to
enhance
transfer
rate.
Theoretical
simulations,
in
situ
Raman
spectroscopy
potential‐dependent
Fourier
transform
infrared
results
disclose
that
strong
local
electric
field
induced
can
promote
H
3
O
+
supply
rate
during
HER,
resulting
∼1.6
times
higher
concentration
around
nanocone
than
electrolyte.
X‐ray
computed
tomography
molecular
dynamic
simulation
demonstrate
diffusion
coefficient
surpasses
commercial
carbon
support
more
16.7
times.
Consequently,
Pt/TiAl‐nanocone
exhibits
a
high
activity
17.2
mA
cm
−2
at
overpotential
100
mV
ultrahigh
TOF
value
42.9
atom
−1
s
.
In
proton
exchange
membrane
water
electrolyzer,
cathode
achieves
industrial‐scale
current
density
1.0
A
cell
voltage
1.88
V
60
°C
operate
stably
least
800
h
sluggish
decay
137
µV
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
Wireless
communication
systems
based
on
discharge‐induced
displacement
current
exhibit
significant
potential
for
enhancing
the
convenience,
security,
and
low
power
consumption
of
wireless
systems.
However,
their
practical
applications
remain
largely
constrained
by
complexity
signals
in
both
time
frequency
domains.
Here,
a
novel
compact
passive
system
composed
self‐powered
e‐sticker
(SWES)
electronic
circuits,
enabling
long‐distance
through
real‐time
signal
processing
strategy,
thereby
applicable
smart
homes
is
proposed.
The
SWES
seamlessly
integrates
triboelectric
nanogenerator
with
an
optimized
plasma
switch
to
ensure
stable
transmission
under
mechanical
stimulation,
achieving
distance
as
high
13
m,
while
maintaining
lightweight
0.24
g
size
3.5
×
2.5
0.0167
cm
3
.
Furthermore,
multimodal
home
control
that
this
design
dedicated
application,
monitoring
appliance
status
intelligent
control,
validating
system's
versatility
demonstrated.
proposed
poised
widespread
deployment
homes,
facilitating
various
appliances
powered
municipal
electricity
holding
substantial
cities,
wearable
electronics,
human–machine
interfaces.
ACS Central Science,
Год журнала:
2024,
Номер
10(10), С. 1920 - 1932
Опубликована: Окт. 3, 2024
The
electricity-driven
5-hydroxymethylfurfural
(HMF)
oxidation
reaction
has
exhibited
increasing
potential
to
produce
high-value-added
2,5-furandicarboxylic
acid
(FDCA).
Unfortunately,
the
competitive
oxygen
evolution
(OER)
can
decrease
yield
and
Faradaic
efficiency
(FE)
of
FDCA
under
high
potentials.
Here,
we
report
a
general
MOF-templated
strategy
construct
new
class
hollow
high-entropy
layered
hydroxide
array
(HE-LHA)
electrocatalysts
including
quinary,
senary,
septenary
phases
composed
CoNiMnCuZn
with
Cd
Mg
on
carbon
cloth
(CC)
for
boosting
HMF
(HMFOR)
by
suppressing
OER.
Impressively,
CC@CoNiMnCuZnCdMg-LHA
exhibits
low
1.42
V
