Small,
Journal Year:
2023,
Volume and Issue:
20(4)
Published: Sept. 13, 2023
Abstract
Developing
high‐efficiency
and
stable
oxygen
evolution
reaction
(OER)
electrocatalysts
is
an
imperative
requirement
to
produce
green
clean
hydrogen
energy.
In
this
work,
the
FeCoS
y
/NCDs
composite
with
nitrogen‐doped
carbon
dots
(NCDs)
modified
Fe–Co
sulfide
(FeCoS
)
nanosheets
prepared
by
using
a
facile
mild
one‐pot
solvothermal
method.
Benefiting
from
low
crystallinity
synergistic
effect
between
NCDs,
optimal
/NCDs‐3
exhibits
overpotential
of
only
284
mV
at
10
mA
cm
−2
,
small
Tafel
value
52.1
dec
−1
excellent
electrochemical
durability
in
alkaline
solution.
Remarkably,
unlike
ordinary
metal
electrocatalysts,
morphology,
components,
structure
can
be
well
retained
after
OER
test.
The
NCDs
electrocatalytic
performance
provides
effective
approach
boost
for
practical
application.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(41)
Published: July 28, 2023
Abstract
Constructing
an
efficient
alkaline
hydrogen
evolution
reaction
(HER)
catalyst
with
low
platinum
(Pt)
consumption
is
crucial
for
the
cost
reduction
of
energy
devices,
such
as
electrolyzers.
Herein,
nanoflower‐like
carbon‐encapsulated
CoNiPt
alloy
catalysts
composition
segregation
are
designed
by
pyrolyzing
morphology‐controlled
and
Pt‐proportion‐tuned
metal–organic
frameworks
(MOFs).
The
optimized
containing
15%
NFs
(15%:
Pt
mass
percentage,
NFs:
nanoflowers)
exhibits
outstanding
HER
performance
a
overpotential
25
mV
at
current
density
10
mA
cm
−2
,
far
outperforming
those
commercial
Pt/C
(47
mV)
most
advanced
catalysts.
Such
superior
activity
originates
from
integration
Co‐O
hybridization.
hierarchical
structure
guarantees
full
exposure
sites.
Density
functional
theory
calculations
suggest
that
components
not
only
promote
water
dissociation
but
also
facilitate
adsorption
process,
synergistically
accelerating
kinetics
HER.
In
addition,
volcanically
distributed
surface
oxygen
content,
mainly
in
form
Co
3d
O
2p
hybridization,
which
another
reason
enhanced
activity.
This
work
provides
feasible
insights
into
design
cost‐effective
coordinating
kinetic
sites
adjusting
appropriate
content.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(7)
Published: Sept. 14, 2023
Hydrogen
production
from
electrolytic
water
electrolysis
is
considered
a
viable
method
for
hydrogen
with
significant
social
value
due
to
its
clean
and
pollution-free
nature,
high
efficiency,
purity,
but
the
anode
oxygen
evolution
reaction
(OER)
process
complex
kinetically
slow.
Single-atom
catalysts
(SACs)
100%
atom
utilization
homogeneous
active
sites
often
exhibit
catalytic
activity
are
expected
be
extensively
applied.
The
performance
of
OER
can
further
improved
by
precise
regulation
structure
through
electronic
effects,
coordination
environment,
heteroatomic
doping,
so
on.
In
this
review,
mechanisms
under
different
conditions
introduced,
latest
research
progress
SACs
in
field
systematically
summarized,
then
effects
various
structural
strategies
on
discussed,
principles
ideas
design
proposed.
end,
outstanding
issues
current
challenges
summarized.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(21)
Published: March 19, 2024
Abstract
The
generation
of
green
hydrogen
by
water
splitting
is
identified
as
a
key
strategic
energy
technology,
and
proton
exchange
membrane
electrolysis
(PEMWE)
one
the
desirable
technologies
for
converting
renewable
sources
into
hydrogen.
However,
harsh
anode
environment
PEMWE
oxygen
evolution
reaction
(OER)
involving
four‐electron
transfer
result
in
large
overpotential,
which
limits
overall
efficiency
production,
thus
efficient
electrocatalysts
are
needed
to
overcome
high
overpotential
slow
kinetic
process.
In
recent
years,
noble
metal‐based
(e.g.,
Ru/Ir‐based
metal/oxide
electrocatalysts)
have
received
much
attention
due
their
unique
catalytic
properties,
already
become
dominant
acidic
OER
process
applied
commercial
devices.
these
still
face
thorny
problem
conflicting
performance
cost.
this
review,
first,
metal
briefly
classified
according
forms
existence,
mechanisms
outlined.
Then,
focus
on
summarizing
improvement
strategies
with
respect
activity
stability
over
years.
Finally,
challenges
development
prospects
discussed.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(19)
Published: March 14, 2024
Abstract
Developing
cost‐efficient
trifunctional
catalysts
capable
of
facilitating
hydrogen
evolution
reaction
(HER),
oxygen
(OER),
and
reduction
(ORR)
activity
is
essential
for
the
progression
energy
devices.
Engineering
these
to
optimize
their
active
sites
integrate
them
into
a
cohesive
system
presents
significant
challenge.
This
study
introduces
nanoflower
(NFs)‐like
carbon‐encapsulated
FeNiPt
nanoalloy
catalyst
(FeNiPt@C
NFs),
synthesized
by
substituting
Co
2+
ions
with
high‐spin
Fe
in
Hofmann‐type
metal‐organic
framework,
followed
carbonization
pickling
processes.
The
FeNiPt@C
NFs
catalyst,
characterized
its
nitrogen‐doped
metal
alloy
structure
phase‐segregated
slight
surface
oxidization,
exhibits
excellent
catalytic
performance.
evidenced
activities
HER
(−25
mV
at
10
mA
cm
−2
),
ORR
(half‐wave
potential
0.93
V),
OER
(294
enhanced
water
oxidation
attributed
state
element.
Consequently,
Zn‐air
battery
anion
exchange
membrane
electrolyzer
assembled
demonstrate
remarkable
power
density
(168
mW
)
industrial‐scale
current
(698
1.85
respectively.
innovative
integration
multifunctional
paves
way
advancement
sustainable
systems.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(7)
Published: Oct. 30, 2023
Abstract
Owing
to
the
Pt‐like
electrocatalytic
capability
and
moderate
price,
Ru‐based
catalysts
are
considered
as
Pt
alternatives
for
electrochemical
water
splitting.
However,
they
demonstrate
limited
catalytic
performance
under
industrial‐level
current
densities.
Herein,
a
novel
electrocatalyst
with
an
extremely
low
amount
(0.85
wt.%)
of
Ru
nanoclusters
anchored
on
Cr‐doped
Fe‐metal–organic
frameworks
(Ru@Cr─FeMOF)
through
robust
Cr─O─Ru
bond
is
presented.
The
study
unveils
that
such
architecture
facilitates
fast
electron
transfer
manipulates
highest
occupied
d
orbital
d‐band
centers
sites,
favoring
both
oxygen
evolution
reaction
(OER)
hydrogen
(HER)
catalysis.
as‐prepared
catalyst
performs
excellent
activity
21
mV@10
mA
cm
−2
HER
230
mV@50
OER
in
alkaline
solution,
realizes
water‐splitting
at
densities
(1.72
V@1000
),
surpassing
state‐of‐the‐art
literatures.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(43)
Published: June 27, 2023
Abstract
Shuttle
effect
and
sluggish
redox
kinetics
of
sulfur
species
still
hinder
the
practical
application
lithium‐sulfur
batteries
(LSBs).
Herein,
a
strategy
integrating
sub‐nano
catalysts
into
metal‐organic
framework
(MOF)
is
proposed
for
developing
efficient
host
to
tackle
these
issues.
The
designed
MOF
(MOF‐TOC)
endowed
with
TiO
clusters
(TOCs)
in
mesopores
can
act
as
an
reaction
chamber
LSBs.
Systematic
electrochemical
measurements
calculations
demonstrate
that
MOF‐TOC
trap
confine
lithium
polysulfides
(LiPSs)
via
strong
chemical
interaction.
Moreover,
highly
active
TOCs
isolated
different
nanopores
accelerate
bidirectional
through
d‐p
orbital
hybridization
species.
Benefiting
from
merits,
delivers
LSBs
remarkably
improved
areal
capacity
cycling
stability
at
high
loadings
lean
electrolytes.
This
work
gives
insight
rational
design
catalyst‐containing
hosts
will
shed
light
on
development
advanced
catalytic
high‐performance
