Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 23, 2024
Abstract
As
the
demand
for
cleaner
energy
becomes
a
paramount
objective
of
sustainable
development,
advancement
cutting‐edge
engineered
materials
wide
range
applications
increasingly
vital.
Tailoring
catalyst
properties
through
precise
design
and
electronic
state
tuning
is
essential
adapting
these
to
large‐scale
applications.
Given
this,
an
effective
fine‐tuning
(EFT)
strategy
presented
optimize
structures
single‐atom
Zn
site
Ru
species,
synergistically
enhancing
both
electrocatalytic
oxygen
reduction
reaction
(ORR)
hydrogen
evolution
(HER).
Benefiting
from
interaction
between
species
anchored
on
hierarchically
layered
nanosheets
isolated
atoms
(Ru@Zn‐SAs/N‐C),
exhibits
superior
ORR
HER
activities
compared
benchmark
Pt/C
catalyst.
X‐ray
absorption
spectroscopy
density
functional
theory
(DFT)
calculations
confirm
novel
EFT
effect
single
that
enables
Ru@Zn‐SAs/N‐C
approaches
optimal
scaling
relation
*
OOH
OH,
breaking
universal
limitation.
Additionally,
G
H*
value
positions
near
apex
theoretical
volcano
model.
This
work
provides
innovative
avenue
regulating
localization
catalytic
active
centers
by
virtue
carbon
substrate
offers
valuable
insights
designing
high‐efficiency
electrocatalysts.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 2, 2024
Abstract
Exploring
an
efficient
nonnoble
metal
catalyst
for
hydrogen
evolution
reaction
(HER)
is
critical
industrial
alkaline
water
electrolysis.
However,
it
remains
a
great
challenge
due
to
the
additional
energy
required
H─OH
bond
cleavage
and
lack
of
enough
H
2
O
adsorption
sites
most
catalysts.
Herein,
integration
oxophilic
Eu
3
with
NiCo
alloy
evoked
multisite
synergism
facilitate
dissociation
HER
proposed.
The
optimized
‐NiCo
exhibits
excellent
activity
low
overpotential
only
60
mV
at
10
mA
cm
−2
good
electrochemical
stability,
which
superior
that
‐free
comparable
benchmark
Pt/C.
key
roles
on
enhanced
performance
are
identified
by
in
situ
Raman
spectroscopy
theoretical
calculations.
It
discovered
strong
oxophilicity
facilitates
breakage
bonding
while
evoking
electron
redistribution
/NiCo
interface
accelerating
Volmer
step
HER.
Furthermore,
obtained
as
both
anode
cathode
displays
overall
water‐splitting
stability
1.0
M
KOH
solution.
believed
this
study
provides
important
inspiration
design
high‐performance
electrocatalysts
toward
based
rare‐earth
materials.
Molecules,
Год журнала:
2024,
Номер
29(18), С. 4304 - 4304
Опубликована: Сен. 11, 2024
Water
electrolysis
has
been
recognized
as
a
promising
technology
that
can
convert
renewable
energy
into
hydrogen
for
storage
and
utilization.
The
superior
activity
low
cost
of
catalysis
are
key
factors
in
promoting
the
industrialization
water
electrolysis.
Single-atom
catalysts
(SACs)
have
attracted
attention
due
to
their
ultra-high
atomic
utilization,
clear
structure,
highest
evolution
reaction
(HER)
performance.
In
addition,
performance
stability
single-atom
(SA)
substrates
crucial,
various
two-dimensional
(2D)
nanomaterial
supports
become
foundations
SA
unique
exposed
surfaces,
diverse
elemental
compositions,
flexible
electronic
structures,
drive
single
atoms
reach
limits.
supported
by
2D
nanomaterials
exhibits
interactions
synergistic
effects,
all
which
need
be
comprehensively
summarized.
This
article
aims
organize
discuss
progress
enhancing
HER,
including
common
widely
used
synthesis
methods,
advanced
characterization
techniques,
different
types
supports,
correlation
between
structural
Finally,
latest
understanding
was
proposed.
Abstract
The
most
feasible
technique
for
producing
green
hydrogen
is
water
electrolysis.
In
recent
years,
there
has
been
significant
study
conducted
on
the
use
of
transition
metal
compounds
as
electrocatalysts
both
anodes
and
cathodes.
Peoples
have
attempted
several
strategies
to
improve
electrocatalytic
activity
their
original
structure.
One
such
involves
introducing
rare
earth
metals
or
creating
heterostructures
with
based
metals.
incorporation
significantly
enhances
by
many
folds,
while
offer
structural
stability
ability
manipulate
electronic
properties
system.
These
factors
led
a
boom
in
investigations
metal‐based
electrocatalysts.
There
currently
pressing
demand
review
article
that
can
provide
comprehensive
overview
scientific
advancements
elucidate
mechanistic
aspects
impact
lanthanide
doping.
This
begins
explaining
structure
lanthanides.
We
next
examine
aspects,
followed
doping
heterostructure
formation
electrolysis
applications.
It
expected
this
particular
effort
will
benefit
broad
audience
stimulate
more
research
area
interest.
image
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 23, 2024
Abstract
The
rational
design
of
single
atom‐based
catalysts
and
precise
elucidation
the
synergistic
interaction
between
metal
site
substrate
are
pivotal
to
identifying
real
active
sites
explicating
catalytic
mechanisms
at
atomic
scale,
thus
contributing
development
high‐performance
for
diverse
industrial
implementations.
Herein,
a
Ru
single‐atom
doping
strategy
is
developed
activate
MoC
with
superior
hydrogen
evolution
reaction
(HER)
activity
in
an
alkaline
medium.
atomically
dispersed
elaborately
doped
into
nanoparticles
loaded
on
3D
N‐doped
carbon
nanoflowers
(Ru‐SAs@MoC/NCFs
hereafter).
experimental
results
theoretical
calculations
manifest
that
isolated
dopants
can
effectively
trigger
Mo
thermodynamically
favorable
water
adsorption/dissociation
energies
facilitate
OH
−
desorption
H
adsorption
N
sites,
synergistically
expediating
overall
HER
kinetics.
As
such,
well‐designed
Ru‐SAs@MoC/NCFs
demonstrate
extraordinary
low
overpotential
16
mV
10
mA
cm
−2
1.0
m
KOH
electrolyte,
outperforming
Pt/C
benchmark
vast
molybdenum/ruthenium‐based
reported
date.
These
findings
disclose
mechanistic
induced
by
modulation
suggest
principle
high‐efficiency
electrocatalysts
via
atomic‐level
manipulation
leverage.
