Molecules,
Год журнала:
2024,
Номер
29(14), С. 3309 - 3309
Опубликована: Июль 13, 2024
CO-selective
methanation
(CO-SMET)
is
an
efficient
hydrogen-rich
(H2-rich)
gas
purification
technology
for
proton
exchange
membrane
fuel
cells.
It
vital
to
develop
suitable
catalysts
with
good
low-temperature
activity
CO-SMET
reactions.
In
this
study,
RuNi/TiZrx-mixed
metal
oxide
(RuNi/TiZrx-MMO)
different
molar
ratios
of
Zr/Ti,
derived
from
a
Zr-promoted
NiTi-layered
double
hydroxide
(NiTi-LDH)
precursor
were
successfully
prepared
using
the
co-precipitation
and
wet
impregnation
methods.
The
RuNi/TiZr0.2-MMO
catalyst
possesses
higher
catalytic
performance
in
lower
temperature
window
180–280
°C,
which
can
reduce
CO
concentration
be
below
10
ppm.
characterization
results
obtained
XRD,
BET,
SEM,
TEM,
XPS,
TPR,
TPD
suggest
that
addition
ZrO2
increases
surface
area
catalyst,
improves
dispersion
metallic
nanoparticles,
reducibility
Ni
species
on
catalyst’s
surface,
enhances
adsorption
activation
ability
CO,
resulting
remarkable
at
reaction
temperatures.
Moreover,
demonstrated
long-term
stability
carbon
resistance.
Materials Chemistry Frontiers,
Год журнала:
2023,
Номер
7(24), С. 6366 - 6388
Опубликована: Янв. 1, 2023
This
review
presents
recent
progress
in
alkaline
HERs,
covering
mechanistic
insights,
catalyst
development,
and
device
performance.
It
also
addresses
challenges
future
directions
for
high-performance
HER
catalysts.
Owing
to
the
advantages
of
low
cost,
rich
resources,
and
intrinsic
safety,
aqueous
Zn-ion
batteries
have
attracted
broad
attention
as
promising
energy
storage
technology
for
large-scale
smart
grids.
The
cathodes
developed
rapidly,
including
Mn-based
cathodes,
V-based
halogen
cathodes.
High
specific
capacity
long
cycling
lifespan
been
achieved.
However,
when
mass
loading
cathode
materials
is
scaled
up
practical
level,
stability
rate
property
are
very
unsatisfactory.
Therefore,
in
this
review,
we
deeply
analyze
key
issues
that
limit
electrochemical
performance
high-loading
batteries.
Subsequently,
comprehensively
summarize
effective
solutions
above
issues,
(1)
rational
binder
design,
(2)
three-dimensional
(3)
material
structural
optimization,
(4)
interface
engineering
Zn
anodes.
Finally,
give
a
critical
perspective
from
commercial
application
future
development
high-energy-density
