Abstract
The
development
of
advanced
electrocatalysts
for
the
abiotic
direct
glucose
fuel
cells
(ADGFCs)
is
critical
in
implantable
devices
living
organisms.
ligand
effect
Pt
shell‐alloy
core
nanocatalysts
known
to
influence
electrocatalytic
reaction
interfacial
structure.
Herein,
we
reported
synthesis
ternary
Pt@PdRu
nanoalloy
aerogels
with
PdRu
on
Pt‐enriched
surface
through
electrochemical
cycling.
optimized
electronic
structure
exhibited
high
mass
activity
and
specific
about
450
mA
mg
−1
1.09
cm
−2
,
which
were
1.4
1.6
times
than
that
commercial
Pt/C.
Meanwhile,
have
higher
stability
comparable
In‐situ
FTIR
spectra
results
proved
oxidation
followed
CO‐free
pathway
mechanism
part
products
are
CO
2
by
completed
oxidation.
Furthermore,
ADGFC
ultrathin
anode
catalyst
layer
showed
a
much
power
density
6.2
mW
Pt/C
(3.8
Mw
).
To
simulate
blood
cell,
integrated
membrane
electrode
assembly
was
exposed
solution
steady‐state
open
circuit
approximately
0.6
V
achieved
optimizing
concentration
cell
system.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Фев. 5, 2025
Electrocatalysts
based
on
Cu
compounds
have
been
considered
as
a
suitable
alternative
to
platinum
due
their
low
cost,
high
abundance,
excellent
redox
properties,
and
performing
the
methanol
oxidation
reaction
(MOR)
at
potentials.
This
article
represents
study
of
CuO
nanoparticles
(NPs)
prepared
through
simple
method
thermal
decomposition
CuL
coordination
compound
(H2L
=
N,N′-bis(salicylidene)-4-chloro-1,2-diaminobenzene),
C20H13ClCuN2O2,
precursor
by
different
electrochemical
methods.
A
comparison
MOR
ability
(CuL)
NPs
shows
that
both
are
active,
but
present
peak
current
density
about
248
mA
cm−
2
when
screened
for
catalytic
in
1.0
M
KOH
with
0.5
methanol,
which
is
superior
performance
some
previously
reported
related
catalysts
CuO.
The
0.69
V
vs.
Ag/AgCl
also
more
intense
than
(0.77
V).
modified
electrode
lower
onset
potential,
Tafel
slope,
higher
electrochemically
active
surface
area
(ECSA)
better
stability
compared
electrode.
These
advantages
can
be
assigned
activity
sites
charge
transfer
resistance
its
electrical
conductivity
CuL.
Abstract
The
direct
methanol
fuel
cell
(DMFC)
represents
a
highly
promising
alternative
power
source
for
small
electronics
and
automobiles
due
to
its
low
operating
temperatures,
high
efficiency,
energy
density.
oxidation
process
(MOR)
constitutes
fundamental
chemical
reaction
occurring
at
the
positive
electrode
of
DMFC.
Pt-based
materials
serve
as
widely
utilized
MOR
electrocatalysts
in
DMFCs.
Nevertheless,
various
challenges,
such
sluggish
rates,
production
costs
primarily
attributed
expensive
catalyst,
adverse
effects
CO
poisoning
on
Pt
catalysts,
hinder
commercialization
Consequently,
endeavors
identify
an
catalyst
catalysts
that
mitigate
these
drawbacks
represent
critical
focal
point
DMFC
research.
In
pursuit
this
objective,
researchers
have
developed
diverse
classes
electrocatalysts,
encompassing
those
derived
from
noble
non-noble
metals.
This
review
paper
delves
into
concept
operational
mechanisms,
well
latest
advancements
metals,
single-atom
molecule
catalysts.
Moreover,
comprehensive
analysis
constraints
prospects
based
metals
has
been
undertaken.
Frontiers in Nanotechnology,
Год журнала:
2024,
Номер
6
Опубликована: Дек. 12, 2024
This
work
presents
a
comparative
study
of
three
synthesis
methods
for
PtRu/C
catalysts
use
in
polymer
electrolyte
fuel
cells,
investigating
their
activity
methanol
oxidation.
The
evaluated
were
formic
acid
reduction
(FAM),
(ARM),
and
ethylene
glycol
(ARE).
XRD
analysis
confirmed
the
formation
Pt-Ru
binary
alloy
all
syntheses.
Electrochemical
tests
indicated
that
properly
prepared,
with
PtRu/CARE
catalyst
standing
out
as
having
best
performance,
achieving
power
density
74,88
mW
cm
−2
at
90°C
an
oxygen
pressure
3
atm
on
cathode.
These
results
highlight
potential
ARE
application
direct
surpassing
obtained
through
other
methods.
