Advanced materials research,
Journal Year:
2024,
Volume and Issue:
1179, P. 111 - 122
Published: Jan. 31, 2024
In
the
field
of
fuel
cell
technology,
development
cost-effective
catalysts
is
crucial
for
commercialization
Alkaline
Membrane
Fuel
Cells
(AMFCs).
Platinum
(Pt)
has
traditionally
been
employed
as
catalyst
in
AMFCs,
but
its
high
cost
poses
a
major
barrier
to
widespread
adoption.
this
study,
new
material
was
developed
by
incorporating
Manganese
Dioxide
(α-MnO
2
)
into
Carbon
Nanotubes
(CNTs)
using
hydrothermal
synthesis
techniques.
The
synthesized
characterized
Scanning
Electron
Microscopy
(SEM)
and
X-ray
diffraction
(XRD),
electrocatalytic
activity
evaluated
through
Linear
Sweep
Voltammetry
(LSV)
CV
Rotating
Disc
Electrode
(RDE)
experiments.
results
showed
that
α-MnO
-CNT
composite
displayed
strong
durability
alkaline
environment
oxygen
reduction
reaction
(ORR).
LSV
measurements
revealed
current
density
-4.1
mA/cm
an
overpotential
-0.3V
relative
Standard
Calomel
(SCE)
0.1M
KOH
electrolyte.
Additionally,
methanol
tolerance
long-term
stability
compared
commercial
Pt/C
catalysts.
This
study
demonstrates
use
alternative
Pt
potential
facilitate
AMFC
technology.
Electrochemical Energy Reviews,
Journal Year:
2024,
Volume and Issue:
7(1)
Published: Jan. 15, 2024
Abstract
Biomass
is
a
low-cost,
abundant
and
renewable
resource
that
can
be
used
to
manufacture
porous
carbon-based
materials
for
variety
of
applications.
Different
mesoporous
carbon
supports
obtained
from
the
various
synthetic
approaches
are
aimed
at
increasing
specific
surface
area
functionalization.
Currently,
most
biomass
energy
recovery.
The
circular
economy
approach
could
lead
development
cheap
sustainable
materials,
turning
wastes
into
precious
resource.
In
this
review,
we
provide
recent
advances
in
field
electrochemistry
derived
biomass,
which
offers
wider
applications
proton
exchange
membrane
fuel
cells
(PEMFCs),
anion
(AEMFCs)
Zn-air
batteries
(ZABs).
focus
on
understanding
required
properties
role
pathways
platinum
group
metal
(PGM)
free
electrocatalysts.
promising
evaluated
towards
oxygen
reduction
reaction
(ORR)
PEMFC,
AEMFC,
ZAB.
results
achieved
showed
expected
performances
these
conversion
devices
still
lack
deployment
practice,
especially
if
compared
with
commercially
available
PGM-free
This
review
article
provides
insights
how
improve
actual
electrocatalytic
activity
biomass-derived
materials.
Graphical
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(11), P. 6211 - 6242
Published: Jan. 1, 2024
This
paper
describes
the
progress
and
future
challenges
in
one-step
carbonization
activation
of
biomass
to
porous
carbons
for
diverse
energy
applications
terms
CO
2
capture,
storage
conversion.
Advanced Energy and Sustainability Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 27, 2025
Metal–air
batteries,
such
as
zinc–air,
are
known
for
their
high
specific
capacity
and
environmental
friendliness.
Operational
longevity
energy
efficiency,
however,
remain
constrained
by
sluggish
reaction
kinetics,
elevated
overpotential,
interfacial
instability
during
charge–discharge
cycles.
While
noble
metal
catalysts
have
historically
addressed
these
gaps,
strategic
resource
allocation
now
prioritizes
abundant,
commercially
reachable,
cost‐effective
alternatives.
Biomass,
a
sustainable
resource,
is
crucial
in
the
development
of
metal‐free
heteroatom‐doped
biomass
carbon
nanostructured
electrocatalysts
porous
air
electrodes
with
excellent
performance
batteries.
These
novel
materials
emerge
critical
enablers,
leveraging
inherent
heteroatom
density,
tunable
pore
architectures,
potential
transition
doping
codoping
to
optimize
bifunctional
activity.
They
also
been
identified
prospective
alternatives
next
generation
oxygen
reduction
evolution
reactions.
This
review
provides
comprehensive
overview
forthcoming
generations
processes,
well
zinc–air
rechargeable
The
physicochemical
features
stabilization
techniques
zinc
electrodes,
dynamic
electrolyte–electrode
interface
conferred.
Journal of The Electrochemical Society,
Journal Year:
2024,
Volume and Issue:
171(6), P. 066510 - 066510
Published: June 3, 2024
Nanocomposites
containing
B,N-codoped
carbon
quantum
dots
(CQDs)
and
an
anion
exchange
ionomer
based
on
poly(2,6-dimethylpolyphenyleneoxide)
with
trimethylammonium
groups
long
side
chains
(PPO-LC)
were
studied
as
catalytic
electrodes
for
the
oxygen
reduction
reaction
(ORR).
The
objective
was
to
reveal
impact
of
graphitic
vs
pyridinic/pyrrolic
nitrogen
ORR
electrocatalysis.
CQDs
prepared
by
hydrothermal
synthesis
analyzed
X-ray
photoelectron
spectroscpy
ascertain
B
N
content
their
position.
drop-casting
ink
PPO-LC
acid-treated
paper
support.
Characterizations
included
water
contact
angle,
capacitance
measurements,
Fourier
transform
infrared
spectra
well
scanning
electron
microscopy
optical
microscopy.
onset
half-wave
potentials,
limiting
current
densities,
Koutecky-Levich
Tafel
plots
revealed
that
sample
only
showed
lowest
electrocatalytic
performance,
underlining
importance
good
activity.
Four-electron
observed
samples
nitrogen.
potential
(0.92
V/RHE)
among
best
in
literature
carbonaceous
materials.
Finally,
durability
tests
performed
indicating
a
long-time
stability
electrodes;
electrode
degradation
impedance
spectroscopy.
Energy Materials,
Journal Year:
2023,
Volume and Issue:
3(6)
Published: Nov. 7, 2023
Exploring
high-activity,
low-cost
platinum
group
metal-free
(PGM-free)
oxygen
reduction
reaction
(ORR)
electrocatalysts
to
replace
precious
metal
Pt
is
critical
for
large-scale
fuel
cell
applications.
Owing
their
wide
source,
controllable
composition,
low
price,
and
excellent
performance,
the
PGM-free
carbon-based
have
attracted
great
interest
in
academia
are
expected
be
an
ideal
replacement
electrocatalysts.
In
this
review,
we
mainly
focus
on
first
introduce
ORR
mechanisms
active
site
classification
of
Then,
propose
four
strategies
enhance
activity
from
perspective
based
relationship
between
structure
function
sites.
Finally,
present
current
challenges
prospects
developing
exhibiting
high
performance
stability.
