Membranes,
Journal Year:
2025,
Volume and Issue:
15(1), P. 13 - 13
Published: Jan. 8, 2025
Recently,
the
recovery
of
metals
extracted
from
spent
membrane
electrode
assemblies
(MEAs)
fuel
cells
has
attracted
significant
scientific
attention
due
to
its
detrimental
environmental
impacts.
Two
major
approaches,
i.e.,
pyrometallurgical
and
hydrometallurgical,
have
been
explored
recover
platinum
group
(PMGs)
used
proton
exchange
(PEMFCs).
However,
efficacy
these
methods
limited
by
low
concentrations
high
costs
involved.
Essentially,
processes
result
in
evolution
harmful
gases.
Thus,
hydrometallurgical
process
is
preferred
as
a
suitable
alternative.
In
this
review,
an
overview
application
PGMs
presented.
The
health
risks,
benefits,
limitations
are
highlighted.
Finally,
hurdles
faced
by,
opportunities
for,
future
directions
approaches
identified.
It
envisaged
that
review
will
shed
light
on
current
status
for
propel
their
advancement
effective
recycling
strategies.
Catalysts,
Journal Year:
2024,
Volume and Issue:
14(10), P. 689 - 689
Published: Oct. 3, 2024
Two-dimensional
transition
metal
dichalcogenides
(TMDs),
also
known
as
MX2,
have
attracted
considerable
attention
due
to
their
structure
analogous
graphene
and
unique
properties.
With
superior
electronic
characteristics,
tunable
bandgaps,
an
ultra-thin
two-dimensional
structure,
they
are
positioned
significant
contenders
in
advancing
electrocatalytic
technologies.
This
article
provides
a
comprehensive
review
of
the
research
progress
TMDs
field
water
splitting.
Based
on
fundamental
properties
principles
electrocatalysis,
strategies
enhance
performance
through
layer
control,
doping,
interface
engineering
discussed
detail.
Specifically,
this
delves
into
basic
properties,
reaction
mechanisms,
measures
improve
catalytic
splitting,
including
creation
more
active
sites,
phase
engineering,
construction
heterojunctions.
Research
these
areas
can
provide
deeper
understanding
guidance
for
application
thereby
promoting
development
related
technologies
contributing
solution
energy
environmental
problems.
hold
great
potential
future
needs
further
explore
develop
new
TMD
materials,
optimize
catalysts
achieve
efficient
sustainable
conversion.
Additionally,
it
is
crucial
investigate
stability
durability
during
long-term
reactions
longevity.
Interdisciplinary
cooperation
will
bring
opportunities
research,
integrating
advantages
different
fields
from
practical
application.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(4), P. 1065 - 1065
Published: Feb. 11, 2025
Water
is
critical
for
the
sustenance
of
life
and
pH
an
important
parameter
in
monitoring
its
quality.
Solid-state
sensors
provide
a
worthy
alternative
to
glass-based
electrodes
due
many
advantages
such
as
low
cost,
longer
shelf
life,
simpler
manufacturing,
easier
operation,
miniaturization,
integration
into
electronic
systems.
Cobalt
oxides
are
relatively
cheaper
more
abundantly
available
than
ruthenium
oxide.
This
work
aims
reduce
environmental
impact
screen-printed
by
mixing
Co3O4
RuO2
five
molar
proportions
(30%,
40%,
50%,
60%,
70%)
investigating
influence
oxide
on
pH-sensing
properties
resulting
composition
using
potentiometric
characterization,
scanning
electron
microscopy,
X-ray
diffraction,
surface
profilometry,
dispersive
spectroscopy.
Although
all
developed
compositions
showed
super-
or
near-Nernstian
sensitivity
with
good
linearity,
based
50
mol%
Co3O4-50
were
best
superior
sensitivity,
selectivity,
stability.
Fabricated
applied
real-life
environmental,
municipal,
commercial
water
samples,
including
those
from
various
depths
Baltic
Sea,
found
be
accurate
comparison
glass
electrode.
International Journal of Low-Carbon Technologies,
Journal Year:
2025,
Volume and Issue:
20, P. 368 - 383
Published: Jan. 1, 2025
Abstract
This
study
introduces
innovative
advancements
in
catalyst
and
membrane
technology
to
improve
fuel
cell
performance
reduce
costs.
Platinum-group
metal
(PGM)-free
iron–nitrogen–carbon
(Fe–N–C)
catalysts
achieved
a
0.85
W/cm2
power
density,
19.88%
improvement
over
traditional
PGM-free
catalysts,
with
stable
operation
exceeding
1000
hours.
Nanostructured
carbon
supports
enhanced
oxygen
reduction
reaction
activity
by
30.13%
current
density
25.02%.
Additionally,
novel
proton
exchange
superior
ionic
conductivity
durability
increased
efficiency
10.12%
while
significantly
reducing
hydrogen
crossover
rates.
These
represent
breakthrough
developing
cost-effective,
high-performance
systems.
