Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 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,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 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.
Inorganic Chemistry Frontiers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
review
summarizes
the
synthesis,
modification,
and
characterization
of
nonmetal-doped
HER
electrocatalysts.
Reported
catalysts
are
categorized
by
dopant
type,
future
prospects
for
non-metal
doping
strategies
discussed.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 3, 2024
The
quest
for
economical
and
highly
efficient
nanomaterials
the
alkaline
hydrogen
oxidation
reaction
(HOR)
is
imperative
in
advancing
technology
of
anion
exchange
membrane
fuel
cells
(AEMFCs).
Efforts
using
Pt-based
electrocatalysts
HOR
are
greatly
plagued
by
their
finitely
intrinsic
activities
significant
CO
poisoning,
stemming
from
difficulty
simultaneously
optimizing
surface
adsorption
toward
different
hydrogen-related
adsorbates.
Herein,
Ru
clusters
coupled
with
Eu2O3
immobilized
within
N-doped
carbon
nanofibers
(Ru/Eu2O3@N-CNFs)
developed
drastically
boosted
electrocatalysis
via
a
d-p-f
gradient
orbital
coupling
strategy.
Theoretical
calculations
situ
operando
spectroscopy
discover
that
induction
optimizes
site
electronic
structure
constructing
Ru(3d)-O(2p)-Eu(4f),
leading
to
optimal
H
intermediates,
improved
ability
OH
reduced
energy
barrier
water
formation,
promoted
oxidation,
endowing
Ru/Eu2O3
as
promising
catalyst
alternative
fast
electrooxidation.
As
result,
Ru/Eu2O3@N-CNFs
reach
an
impressive
kinetic
current
densities
(jk)
value
156.3
mA
cm–2
at
50
mV
(38.4
times
higher
than
Pt/C),
decent
stability
over
35000
s
continuous
operation.
This
comprehensive
investigation
featuring
provides
valuable
insights
strategic
development
high-performance
Ru-based
materials
beyond.
Exploiting
low-cost
electrocatalysts
with
highly
efficient
and
stable
catalytic
activity
in
both
acidic
alkaline
solutions
is
the
key
to
large-scale
application
of
hydrogen
production
by
water
electrolysis.
Here,
Ru
nanoparticle-anchored
MoP@Mo
composites
were
synthesized
high-temperature
phosphorization
combined
photodeposition
method.
Ru/MoP@Mo
as
an
electrocatalyst
for
evolution
reaction
exhibited
a
Pt-like
electrocatalytic
activity,
including
low
overpotentials
54
52
mV
at
10
mA·cm–2
current
density
0.5
M
H2SO4
1.0
KOH
solutions,
respectively,
small
Tafel
slopes,
long-term
stability
mA·cm–2.
Meanwhile,
theoretical
calculations
revealed
that
excellent
was
ascribed
strong
electronic
interaction
between
MoP,
which
optimizes
adsorption
tension
H
on
surface
thereby
accelerates
desorption
H.
This
work
provides
new
strategy
preparing
Mo-based
HER
high
environments.
