Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
The
interfacial
electronic
structure
has
a
significant
influence
on
the
electrocatalytic
activity
and
durability
of
metal
oxide-supported
ruthenium
(Ru)
electrocatalysts
for
alkaline
hydrogen
oxidation
reaction
(HOR).
Herein,
we
optimize
by
tuning
Ru-O
bonds
within
MnO
lattice-confined
Ru
electrocatalysts,
creating
efficient
stable
sites
HOR.
formed
generate
localized
electrons
downshifted
d-band
center
atoms,
which
results
in
optimal
adsorption
ability
H*
OH*
together
with
reduced
energy
barrier
H2O
formation.
mass
achieves
1.26
mA
μgRu-1
0.1
M
KOH,
is
13.0-fold
8.0-fold
higher
than
that
contrast
Ru/C
(0.097
μgRu-1)
commercial
Pt/C
(0.158
μgPt-1),
respectively,
while
also
exhibiting
favorable
CO
tolerance.
This
work
highlights
rational
design
optimizing
to
enhance
HOR
activity.
A
key
challenge
in
the
field
of
hydrogen
evolution
reaction
(HER)
is
to
develop
catalysts
that
not
only
perform
well
pure
alkaline
conditions
but
also
maintain
high
efficiency
simulated
seawater,
which
poses
additional
complexities
due
presence
salts.
This
study
introduces
Nd-doped
MoS2
nanosheets
on
carbon
cloth
(Mo1–xNdxS2⊥CC)
as
a
high-performance
electrocatalyst
tailored
for
HER
both
saltwater
and
water.
The
optimized
catalyst
demonstrates
an
exceptional
overpotential
112
mV
at
current
density
10
mA/cm2,
significantly
lower
than
235
exhibited
by
pristine
under
same
conditions.
Density
functional
theory
(DFT)
calculations
experimental
data
indicate
Nd
doping
enhances
catalytic
performance
creating
oxophilic
sites
improve
water
adsorption
dissociation,
modulating
electronic
structure
accelerate
Volmer
Heyrovsky
kinetics.
Additionally,
sulfur
vacancy
(Sv)
further
strengthens
interaction
between
S,
enhancing
activation
lowering
dissociation
barrier.
maintains
over
95%
its
initial
activity
after
48
h
operation
underscoring
excellent
stability
effectiveness.
These
advancements
design
address
pressing
need
robust
variable
electrolytes
underscore
broader
applicability
metal-doped
other
transition
metals
like
Ru,
Mn,
Fe,
potentially
across
diverse
operational
environments.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
The
interfacial
electronic
structure
has
a
significant
influence
on
the
electrocatalytic
activity
and
durability
of
metal
oxide-supported
ruthenium
(Ru)
electrocatalysts
for
alkaline
hydrogen
oxidation
reaction
(HOR).
Herein,
we
optimize
by
tuning
Ru-O
bonds
within
MnO
lattice-confined
Ru
electrocatalysts,
creating
efficient
stable
sites
HOR.
formed
generate
localized
electrons
downshifted
d-band
center
atoms,
which
results
in
optimal
adsorption
ability
H*
OH*
together
with
reduced
energy
barrier
H2O
formation.
mass
achieves
1.26
mA
μgRu-1
0.1
M
KOH,
is
13.0-fold
8.0-fold
higher
than
that
contrast
Ru/C
(0.097
μgRu-1)
commercial
Pt/C
(0.158
μgPt-1),
respectively,
while
also
exhibiting
favorable
CO
tolerance.
This
work
highlights
rational
design
optimizing
to
enhance
HOR
activity.
