Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 25, 2024
Green
hydrogen
plays
a
crucial
role
in
decarbonization
and
the
future
of
low-carbon
society.
Still,
its
transport/distribution
cost
production,
mainly
realized
by
electrolysis,
are
major
hurdles.
Liquid
H2
carriers
reduce
costs
but
add
further
expenses
for
their
production.
To
address
this
challenge,
we
proposed
novel
strategy
electrocatalytic
production
liquid
organic
carrier
with
anodic
valorization
process.
This
review
summarizes
state
art
outlooks
new
concept.
The
process
is
briefly
introduced,
main
components
discussed.
Subsequently,
oxidation
from
to
processes,
together
paired
processes
reactors,
analyzed,
highlighting
challenges
prospects.
Polymers for Advanced Technologies,
Journal Year:
2025,
Volume and Issue:
36(1)
Published: Jan. 1, 2025
ABSTRACT
This
study
introduces
a
simple
technique
for
producing
ceria
nanoparticle‐dispersed
polyvinyl
alcohol/sulfonated‐polybenzoxazine
(CeO2@PVA/poly
S‐BZ)
composite
membranes
and
examines
their
physicochemical,
thermochemical,
electrochemical
properties.
Field
emission
scanning
electron
microscopy
(FE‐SEM)
was
utilized
to
analyze
the
surface
cross‐sectional
morphology
of
produced
polymer
nanocomposite
membranes.
The
objective
is
create
membrane
with
improved
oxidative
stability,
ionic
conductivity,
mechanical
durability
fuel
cell
applications.
membranes'
production
validated
via
Fourier‐transform
infrared
thermogravimetric
studies.
CeO2@PVA/poly
S‐BZ
demonstrated
proton
conductivity
1.72
×
10
−2
S/cm
at
80°C,
whereas
pristine
PVA/poly
showed
3.266
same
temperature.
Analysis
temperature‐dependent
an
Arrhenius
plot
indicated
that
membrane's
proton‐transport
mechanism
likely
encompasses
both
Grotthuss
vehicular
processes.
1
wt%
exhibited
remarkable
merely
65.5%
breakdown
following
24
h
exposure
Fenton
reagent
80°C.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(15), P. 2208 - 2208
Published: Aug. 2, 2024
Nafion
membranes
are
widely
used
as
proton
exchange
membranes,
but
their
conductivity
deteriorates
in
high-temperature
environments
due
to
the
loss
of
water
molecules.
To
address
this
challenge,
we
propose
utilization
porous
aromatic
frameworks
(PAFs)
a
potential
solution.
PAFs
exhibit
remarkable
characteristics,
such
high
specific
surface
area
and
porosity,
channels
can
be
post-synthesized.
Here,
novel
approach
was
employed
synthesize
PAF
material,
designated
PAF-45D,
which
exhibits
1571.9
m
Macromolecules,
Journal Year:
2024,
Volume and Issue:
57(21), P. 10338 - 10348
Published: Oct. 23, 2024
Polybenzimidazole
(PBI)
exhibits
considerable
advantages
as
a
leading
membrane
material
for
high-temperature
proton
exchange
fuel
cells
(HT-PEMFCs).
However,
their
harsh
synthesis
conditions
and
high
processing
costs
have
greatly
restricted
the
large-scale
commercialization
of
HT-PEMFCs.
Therefore,
developing
high-performance
durable
materials
alternatives
to
PBI
has
been
recognized
key
technical
challenge
advancement
HT-PEMFC
technology.
In
this
study,
series
novel
multiblock
copolymers
QPSBI-b-xTMA,
consisting
acidophobic
pentafluorophenyl,
acidophilic
quaternary
ammonium
groups,
free-volume
spirobisindane,
were
synthesized
by
straightforward
polymerization
process
involving
two
kinds
low-molecular-weight
oligomers
with
different
structures.
The
resulting
membranes
QPSBI-b-xTMA
demonstrate
well-defined
microporous
properties,
PA-doped
exhibit
microphase
separation
structure,
which
effectively
facilitates
conduction
(75.45
mS
cm–1@200
°C).
HT-PEMFCs
based
on
QPSBI-b-xTMA/PA
can
operate
efficiently
within
temperature
range
160–220
°C,
achieving
peak
power
density
0.84
W
cm–2
without
external
pressure
humidity.
Notably,
owing
siphoning
effect
micropores
strong
ammonium-biphosphate
ion
pairs,
cell
stable
performance
at
current
0.5
A
160
minimal
voltage
degradation
rate
merely
4.7
μV
h–1.
Thus,
newly
developed
present
promising
avenue
applications.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Dec. 30, 2024
High-temperature
proton
exchange
membrane
fuel
cells
(HT-PEMFCs)
offer
solutions
to
challenges
intrinsic
low-temperature
PEMFCs,
such
as
complex
water
management,
inflexibility,
and
thermal
integration.
However,
they
are
hindered
by
phosphoric
acid
(PA)
leaching
catalyst
migration,
which
destabilize
the
critical
three-phase
interface
within
electrode
assembly
(MEA).
This
study
presents
an
innovative
approach
enhance
HT-PEMFC
performance
through
modification
using
picosecond
laser
scribing,
optimises
forming
a
graphene-like
structure
that
mitigates
PA
leaching.
Our
results
demonstrate
laser-induced
of
PA-doped
membranes,
particularly
on
cathode
side,
significantly
enhances
durability
HT-PEMFCs,
achieving
peak
power
density
817.2
mW
cm⁻²
after
accelerated
stress
testing,
representing
notable
58.2%
increase
compared
untreated
membranes.
Furthermore,
comprehensive
three-dimensional
multi-physics
model,
based
X-ray
micro-computed
tomography
data,
was
employed
visualise
quantify
impact
this
treatment
dynamic
electrochemical
processes
MEA.
Hence,
work
provides
both
scalable
methodology
stabilise
important
future
technology,
clear
mechanistic
understanding
how
targeted
acts
optimise
can
have
across
wide
array
applications.
