Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 5, 2025
Abstract
Electrocatalytic
water
splitting
has
emerged
as
a
key
method
for
large‐scale
production
of
green
hydrogen.
Constructing
efficient,
durable,
and
low‐cost
electrocatalysts
the
hydrogen
evolution
reaction
at
high
current
densities
is
prerequisite
practical
industrial
applications
splitting.
Recently,
non‐noble
metal‐based
self‐supporting
electrodes
have
been
explored
density
due
to
their
cost‐effective,
conductivity
metal
substrate,
robust
interfacial
binding
between
catalyst
strong
mechanical
stability.
In
this
review,
recently
reported
(Ni,
Fe,
Cu,
Co,
Ti,
Mo,
alloy)
electrode
applied
are
comprehensively
summarized,
classified,
discussed.
Five
fundamental
design
principles
such
intrinsic
activity,
abundant
active
sites,
fast
electron
transfer,
mass
transport,
stability
proposed
discussed
achieve
high‐performance
under
densities.
Furthermore,
various
modification
strategies
including
heteroatom
doping,
morphology
engineering,
interface
phase
strain
engineering
enhance
catalytic
activity
durability
electrode.
Finally,
challenges
prospects
designing
efficient
stable
in
future
This
comprehensive
overview
will
provide
valuable
insight
guidance
development
production.
Abstract
Creating
specific
noble
metal/metal‐organic
framework
(MOF)
heterojunction
nanostructures
represents
an
effective
strategy
to
promote
water
electrolysis
but
remains
rather
challenging.
Herein,
a
electrocatalyst
is
developed
by
growing
Ir
nanoparticles
on
ultrathin
NiFe‐MOF
nanosheets
supported
nickel
foam
(NF)
via
readily
accessible
solvothermal
approach
and
subsequent
redox
strategy.
Because
of
the
electronic
interactions
between
nanosheets,
optimized
Ir@NiFe‐MOF/NF
catalyst
exhibits
exceptional
bifunctional
performance
for
hydrogen
evolution
reaction
(HER)
(
η
10
=
15
mV,
denotes
overpotential)
oxygen
(OER)
213
mV)
in
1.0
m
KOH
solution,
superior
commercial
recently
reported
electrocatalysts.
Density
functional
theory
calculations
are
used
further
investigate
shedding
light
mechanisms
behind
enhanced
HER
OER
performance.
This
work
details
promising
design
development
efficient
electrocatalysts
overall
splitting.
Abstract
Developing
non‐precious‐metal
electrocatalysts
that
can
operate
with
a
low
overpotential
at
high
current
density
for
industrial
application
is
challenging.
Heterogeneous
bimetallic
phosphides
have
attracted
much
interest.
Despite
hydrogen
evolution
reaction
(HER)
performance,
the
ordinary
oxygen
(OER)
performance
hinders
their
practical
use.
Herein,
it
shown
Fe‐doping
reverses
and
enlarges
interfacial
electrical
field
heterojunction,
turning
H
intermediate
favorable
binding
sites
HER
into
O
OER.
Specifically,
self‐supported
heterojunction
catalysts
on
nickel
foam
(CoP@Ni
2
P/NF
Fe‐CoP@Fe‐Ni
P/NF)
are
readily
synthesized.
They
only
require
overpotentials
of
266
274
mV
to
drive
large
1000
mA
cm
−2
(
j
)
OER,
respectively.
Furthermore,
water
splitting
cell
equipped
these
electrodes
requires
voltage
1.724
V
excellent
durability,
demonstrating
potential
application.
This
work
offers
new
insights
engineering
catalysts.
Inorganic Chemistry,
Год журнала:
2025,
Номер
64(1), С. 361 - 370
Опубликована: Янв. 2, 2025
Clean
energy
conversion
and
storage
require
simple,
economical,
effective
electrode
materials
to
achieve
promising
results.
The
development
of
high-performance
electrocatalysts
with
adequate
stability
cost-effectiveness
is
essential
ensure
low
overpotentials
toward
the
oxygen
evolution
reaction
(OER).
Herein,
a
cobalt-based
metal-organic
framework
4,4,4-6T14
topology
in
combination
various
ratios
NiMn-layered
double
hydroxide
(Co-MOF@X%NiMn-LDH,
X
=
5,
10,
20,
40%)
applied
as
an
electrocatalyst
for
oxidation
water.
optimum
sample,
Co-MOF@20%NiMn-LDH
nanocomposite,
showed
overpotential
174
mV
at
current
density
10
mA
cm-2
reduced
Tafel
slope
64
dec-1
1
M
KOH,
which
makes
it
excellent
candidate,
significantly
superior
commercial
IrO2
most
MOF-
LDH-based
electrocatalysts.
Chronopotentiometry
tests
OER
over
several
hours
confirmed
that
these
have
been
sufficiently
stable.
Pillared
MOFs
can
obstruct
active
entities
from
NiMn-LDH
cubic
agglomeration,
thus
facilitating
mass
transportation
ensuring
continuous
exposure
sites.
Accordingly,
synthesized
composite
demonstrates
considerable
electrocatalytic
efficiency
OER,
consequence
porous
structure,
external
surface
area,
synergistic
effects
among
Co-MOF
samples.
Abstract
The
conversion
of
electricity
into
hydrogen
(H
2
)
gas
through
electrochemical
water
splitting
using
efficient
electrocatalysts
has
been
one
the
most
important
future
technologies
to
create
vast
amounts
clean
and
renewable
energy.
Low-temperature
electrolyzer
systems,
such
as
proton
exchange
membrane
electrolyzers,
alkaline
anion
electrolyzers
are
at
forefront
current
technologies.
Their
performance,
however,
generally
depends
on
costs
system
efficiency,
which
can
be
significantly
improved
by
developing
high-performance
enhance
kinetics
both
cathodic
evolution
reaction
anodic
oxygen
reaction.
Despite
numerous
active
research
efforts
in
catalyst
development,
performance
electrolysis
remains
insufficient
for
commercialization.
Ongoing
innovative
an
understanding
catalytic
mechanisms
critical
enhancing
their
activity
stability
electrolyzers.
This
is
still
a
focus
academic
institutes/universities
industrial
R&D
centers.
Herein,
we
provide
overview
state
directions
H
production.
Additionally,
describe
detail
technological
framework
production
utilized
relevant
global
companies.
Graphical
Abstract
Rational
design
of
heterostructure
catalysts
through
phase
engineering
strategy
plays
a
critical
role
in
heightening
the
electrocatalytic
performance
catalysts.
Herein,
novel
amorphous/crystalline
(a/c)
(a‐CoS/Ni
3
S
2
)
is
manufactured
by
facile
hydrothermal
sulfurization
method.
Strikingly,
interface
coupling
between
amorphous
(a‐CoS)
and
crystalline
(Ni
a‐CoS/Ni
much
stronger
than
that
(c‐CoS)
crystalline/crystalline
(c/c)
(c‐CoS/Ni
as
control
sample,
which
makes
meta‐stable
structure
more
stable.
Meanwhile,
has
vacancies
(S
v
c‐CoS/Ni
because
presence
an
phase.
Eventually,
for
oxygen
evolution
reaction
(OER),
exhibits
significantly
lower
overpotential
192
mV
at
10
mA
cm
−2
compared
to
(242
mV).
An
exceptionally
low
cell
voltage
1.51
V
required
achieve
current
density
50
overall
water
splitting
assembled
||
Pt/C).
Theoretical
calculations
reveal
charges
transfer
from
a‐CoS
Ni
,
promotes
enhancement
OER
activity.
This
work
will
bring
into
play
fabrication
a/c
understanding
catalytic
mechanism
heterostructures.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(45)
Опубликована: Окт. 28, 2024
Abstract
High‐current‐density
water
electrolysis
is
considered
a
promising
technology
for
industrial‐scale
green
hydrogen
production,
which
of
significant
value
to
energy
decarbonization
and
numerous
sustainable
industrial
applications.
To
date,
substantial
research
advancements
are
achieved
in
catalyst
design
laboratory‐based
electrolysis.
While
the
designed
catalysts
demonstrate
remarkable
performance
at
low
current
densities,
they
suffer
from
marked
deteriorations
both
activity
long‐term
stability
under
industrial‐level
high‐current‐density
operations.
provide
timely
assessment
that
helps
bridge
gap
between
laboratory‐scale
fundamental
practical
technology,
here
various
commercial
electrolyzers
first
systematically
analyzed,
then
key
parameters
including
work
temperature,
density,
lifetime
stacks,
cell
efficiency,
capital
cost
stacks
critically
evaluated.
In
addition,
impact
high
density
on
electrocatalytic
behavior
catalysts,
intrinsic
activity,
stability,
mass
transfer,
discussed
advance
design.
Therefore,
by
covering
range
critical
issues
material
principles
parameters,
future
directions
development
highly
efficient
low‐cost
presented
procedure
screening
laboratory‐designed
outlined.
Abstract
Featured
with
the
attractive
properties
such
as
large
surface
area,
unique
atomic
layer
thickness,
excellent
electronic
conductivity,
and
superior
catalytic
activity,
layered
metal
chalcogenides
(LMCs)
have
received
considerable
research
attention
in
electrocatalytic
applications.
In
this
review,
approaches
developed
to
synthesize
LMCs‐based
electrocatalysts
are
summarized.
Recent
progress
composites
for
electrochemical
energy
conversion
applications
including
oxygen
reduction
reaction,
carbon
dioxide
evolution
hydrogen
overall
water
splitting,
nitrogen
reaction
is
reviewed,
potential
opportunities
practical
obstacles
development
of
high‐performing
active
substances
also
discussed.
This
review
may
provide
an
inspiring
guidance
developing
high‐performance
LMCs
Chemistry - A European Journal,
Год журнала:
2024,
Номер
30(20)
Опубликована: Янв. 15, 2024
Abstract
Hydrogen
(H
2
),
produced
by
water
electrolysis
with
the
electricity
from
renewable
sources,
is
an
ideal
energy
carrier
for
achieving
a
carbon‐neutral
and
sustainable
society.
evolution
reaction
(HER)
cathodic
half‐reaction
of
electrolysis,
which
requires
active
robust
electrocatalysts
to
reduce
consumption
H
generation.
Despite
numerous
have
been
reported
academia
HER,
most
them
were
only
tested
under
relatively
small
current
densities
short
period,
cannot
meet
requirements
industrial
electrolysis.
To
bridge
gap
between
industry,
it
crucial
develop
highly
HER
can
operate
at
large
long
time.
In
this
review,
mechanisms
in
acidic
alkaline
electrolytes
are
firstly
introduced.
Then,
design
strategies
towards
high‐performance
large‐current‐density
five
aspects
including
number
sites,
intrinsic
activity
each
site,
charge
transfer,
mass
stability
discussed
via
featured
examples.
Finally,
our
own
insights
about
challenges
future
opportunities
emerging
field
presented.
