Nanomaterials,
Год журнала:
2024,
Номер
14(24), С. 2003 - 2003
Опубликована: Дек. 13, 2024
Developing
highly
active
and
durable
non-noble
metal
catalysts
is
crucial
for
energy
conversion
storage,
especially
proton
exchange
membrane
fuel
cells
(PEMFCs)
lithium-oxygen
(Li-O2)
batteries.
Non-noble
are
considered
the
greatest
potential
candidates
to
replace
noble
in
PEMFCs
Li-O2
Herein,
we
propose
a
novel
type
of
catalyst
(Fe-Hf/N/C)
doped
with
Hf
into
mesoporous
carbon
material
derived
from
Hf-ZIF-8
co-doping
Fe
N,
which
greatly
enhanced
activity
durability
catalyst.
When
applied
cathode
PEMFCs,
current
density
can
reach
up
1.1
1.7
A
cm−2
at
0.7
0.6
V,
respectively,
maximum
power
1.15
W
cm−2.
The
discharge
capacity
batteries
15,081
mAh
g−1
Fe-Hf/N/C
cathode,
also
shows
lower
charge
overpotential,
200
mV
than
that
Fe/N/C.
Additionally,
has
demonstrated
better
stability
both
This
reveals
not
only
optimize
electronic
structure
iron
sites
increase
oxygen
reduction
reaction,
but
anchor
sites,
enhancing
study
provides
new
strategy
development
high-performance
Nano-Micro Letters,
Год журнала:
2024,
Номер
17(1)
Опубликована: Сен. 25, 2024
Abstract
Green
hydrogen
from
water
splitting
has
emerged
as
a
critical
energy
vector
with
the
potential
to
spearhead
global
transition
fossil
fuel-independent
society.
The
field
of
catalysis
been
revolutionized
by
single-atom
catalysts
(SACs),
which
exhibit
unique
and
intricate
interactions
between
atomically
dispersed
metal
atoms
their
supports.
Recently,
bimetallic
SACs
(bimSACs)
have
garnered
significant
attention
for
leveraging
synergistic
functions
two
ions
coordinated
on
appropriately
designed
BimSACs
offer
an
avenue
rich
metal–metal
metal–support
cooperativity,
potentially
addressing
current
limitations
in
effectively
furnishing
transformations
involve
synchronous
proton–electron
exchanges,
substrate
activation
reversible
redox
cycles,
simultaneous
multi-electron
transfer,
regulation
spin
states,
tuning
electronic
properties,
cyclic
states
low
energies.
This
review
aims
encapsulate
growing
advancements
bimSACs,
emphasis
pivotal
role
generation
via
splitting.
We
subsequently
delve
into
advanced
experimental
methodologies
elaborate
characterization
SACs,
elucidate
discuss
local
coordination
environment.
Overall,
we
present
comprehensive
discussion
deployment
bimSACs
both
evolution
reaction
oxygen
reaction,
half-reactions
electrolysis
process.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 3, 2025
Abstract
Oxygen
electrocatalysis
is
a
core
reaction
in
renewable
energy
devices,
greatly
promoting
the
transformation
and
upgrading
of
structure.
Nonetheless,
performance
conversion
devices
hindered
by
large
overpotential
slow
kinetics
oxygen
electrocatalytic
reactions.
Recently,
single‐atom
catalysts
(SACs)
have
emerged
as
promising
contenders
field
because
their
exceptional
metal
atom
utilization,
distinctive
coordination
environment,
adjustable
electronic
properties.
This
review
presents
latest
advancements
design
Co‐based
SACs
for
electrocatalysis.
First,
OER
ORR
mechanisms
are
introduced.
Subsequently,
strategies
regulating
structure
summarized
three
aspects,
including
centers,
support
carriers.
A
particular
emphasis
given
to
relationship
between
properties
catalysts.
Afterward,
applications
explored.
Ultimately,
challenges
prospects
prospected.
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Март 13, 2025
Abstract
The
state-of-the-art
anion-exchange
membrane
water
electrolyzers
(AEMWEs)
require
highly
stable
electrodes
for
prolonged
operation.
stability
of
the
electrode
is
closely
linked
to
effective
evacuation
H
2
or
O
gas
generated
from
surface
during
electrolysis.
In
this
study,
we
prepared
a
super-hydrophilic
by
depositing
porous
nickel–iron
nanoparticles
on
annealed
TiO
nanotubes
(NiFe/ATNT)
rapid
outgassing
such
nonpolar
gases.
NiFe/ATNT
exhibited
an
overpotential
235
mV
at
10
mA
cm
−2
oxygen
evolution
reaction
in
1.0
M
KOH
solution,
and
was
utilized
as
anode
AEMWE
achieve
current
density
1.67
A
1.80
V.
addition,
with
electrode,
which
enables
outgassing,
showed
record
1500
h
0.50
under
harsh
temperature
conditions
80
±
3
°C.
Dalton Transactions,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Both
defective
HKUST-1(H)
and
HKUST-1(OH)
MOF
nodes
can
selectively
transform
ethanol
to
acetaldehyde
where
undergoes
transfiguration
at
the
end
of
first
catalytic
cycle.
