Quimica Hoy,
Journal Year:
2023,
Volume and Issue:
12(02), P. 25 - 31
Published: Nov. 19, 2023
Este
trabajo
reporta
la
síntesis
de
un
catalizador
bimetálico
compuesto
por
nanopartículas
Pd
y
Cu
soportados
en
carbón
Vulcan
activado
(Pd-Cu/C).
El
Pd-Cu/C
se
sintetizó
el
método
poliol
asistido
mediante
microondas
caracterizó
estudio
sus
propiedades
fisicoquímicas
estructurales
con
diversas
técnicas,
tales
como:
Microscopía
electrónica
barrido,
Espectroscopía
dispersión
energía,
Espectrometría
retrodispersión
Rutherford
Difracción
Rayos
—X.
Estas
técnicas
mostraron
formación
aleación
una
estructura
cubica
cristalina.
La
caracterización
electroquímica
del
reportó
excelente
actividad
electro-oxidación
etanol
(1.0
M)
bio-etanol
medio
alcalino
(1
M
KOH).
Asimismo,
mostró
ser
estable
durante
100
ciclos
(con
potencial
aplicado
-0.19
V
vs
electrodo
Calomel
saturado)
sin
mostrar
envenenamiento
CO
ni
generar
sub-productos.
Dalton Transactions,
Journal Year:
2023,
Volume and Issue:
52(24), P. 8466 - 8472
Published: Jan. 1, 2023
Limited
by
single
metal
active
sites
and
low
electrical
conductivity,
designing
nickel-based
metal-organic
framework
(MOF)
materials
with
high
activity
durability
remains
a
challenge.
Here,
novel
class
of
two-dimensional
trimetallic
MOF
nanosheets
plentiful
sites,
rich
defects,
facilitated
mass
electron
transfer
channels
is
developed
as
efficient
electrocatalysts
for
boosting
oxygen
evolution
reaction
(OER).
The
unique
2D
nanosheet
structure
enlarges
the
area;
meanwhile,
organic
ligand
in
can
work
pillar
to
enlarge
interplanar
space
boost
ion
transportation,
synergistic
effect
between
multi-metal
effectively
promote
electrocatalytic
activity.
Interestingly,
after
an
electrochemical
activation
process,
optimized
NiFeZn
yield
abundant
enabling
them
deliver
overpotential
233
mV
at
10
mA
cm-2
much
smaller
Tafel
slope
37.8
dec-1.
More
importantly,
this
method
also
universal
synthesis
NiFe-MOF
family
achieving
outstanding
OER
performance.
These
findings
present
strategy
construction
OER.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(46)
Published: Oct. 23, 2024
Abstract
Entropy,
a
measure
of
disorder
or
uncertainty
in
the
thermodynamics
system,
has
been
widely
used
to
confer
desirable
functions
alloys
and
ceramics.
The
incorporation
three
more
principal
elements
into
single
sublattice
increases
entropy
medium
high
levels,
imparting
these
materials
mélange
advanced
mechanical
catalytic
properties.
In
particular,
when
scaling
down
dimensionality
crystals
from
bulk
2D
space,
interplay
between
stabilization
quantum
confinement
offers
enticing
opportunities
for
exploring
new
fundamental
science
applications,
since
structural
ordering,
phase
stability,
local
electronic
states
distorted
get
significantly
reshaped.
During
last
few
years,
large
family
high‐entropy
is
rapidly
expanding
host
MXenes,
hydrotalcites,
chalcogenides,
metal‐organic
frameworks
(MOFs),
many
other
uncharted
members.
Here,
recent
advances
this
dynamic
field
are
reviewed,
elucidating
influence
on
properties
underlying
elementary
mechanisms
materials.
their
structure‐property
relationships
resulting
theoretical
predictions
experimental
findings
discussed.
Furthermore,
an
outlook
key
challenges
such
emerging
also
provided.
