Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 8, 2024
Abstract
Developing
cost‐effective
ruthenium
(Ru)‐based
HER
electrocatalysts
as
alternatives
to
commercial
Pt/C
is
crucial
for
the
advancement
of
proton
exchange
membrane
water
electrolysis
(PEMWE).
However,
strong
hydrogen
adsorption
Ru‐based
catalysts
restricts
its
activity.
Herein,
a
strategy
reported
tune
electronic
structure
and
improve
mass
transfer
by
implanting
Ru
atoms
onto
(002)
facet
two‐dimensional
zeolitic
imidazolate
framework‐67
(Ru@
L
ZIF
)
optimize
d
‐band
center
(
ε
spillover
behavior.
Benefiting
from
ultrathin
nanosheet
optimized
Ru,
over‐strong
H
energy
weakened
electron/mass
facilitated.
Ru@
exhibits
an
overpotential
9.2
mV
at
10
mA
cm
−2
long‐lasting
stability
35
days
100
.
The
activity
price
2.9
14.7
times
higher
than
Pt/C,
respectively.
More
impressively,
delivers
cell
voltage
2.01
V
high
current
density
4
A
in
PEMWE.
excellent
long‐term
durability
1200
hours
operating
with
ultralow
decay
rate
7.5
×
−3
h
−1
has
been
achieved,
making
it
promising
alternative
catalyst
PEMWE
applications.
Applied Physics Letters,
Journal Year:
2025,
Volume and Issue:
126(11)
Published: March 1, 2025
Realizing
fast
electron
transfer
and
rapid
mass
transport
in
high
current
density
hydrogen
evolution
reaction
(HER)
is
pivotal
imperative
for
water
electrolysis.
Here,
we
developed
Ni/NiMoN
Mott-Schottky
heterostructures
with
unique
superwettability
that
can
enhance
both
transfer,
greatly
reducing
the
energy
demand
splitting.
Experimental
functional
theory
demonstrate
situ
grown
Ni
nanoparticles
optimize
dissociation
of
molecules
from
surface
adsorption
H*,
facilitating
spillover
process
on
Ni/NiMoN.
The
optimized
electrode
delivers
outstanding
HER
performance
an
ultralow
overpotential
−231.3
mV
at
−1000
mA
cm−2
maintains
stable
operation
1000
h
alkaline
media.
An
anion-exchange
membrane
electrolyzer
using
as
cathode
achieve
a
low
voltage
1.93
V
superstability.
Our
work
paves
efficient
way
constructing
active
robust
catalysts
toward
industrial-level
production.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
The
development
of
efficient
and
stable
electrocatalysts
for
the
hydrogen
evolution
reaction
(HER)
is
essential
realization
effective
production
via
seawater
electrolysis.
Herein,
study
has
developed
a
simple
method
that
combines
electrospinning
with
subsequent
thermal
shock
technology
to
effectively
disperse
ruthenium
nanoparticles
onto
highly
conductive
titanium
carbide
nanofibers
(Ru@TiC).
electronic
metal-support
interactions
(EMSI)
resulted
from
charge
redistribution
at
interface
between
Ru
TiC
support
can
optimize
desorption
kinetics
sites
induce
spillover
phenomenon,
thereby
improving
evolution.
As
result,
Ru@TiC
catalyst
exhibits
outstanding
HER
activity,
requiring
low
overpotentials
only
65
mV
in
alkaline
current
density
100
mA
cm-2.
Meanwhile,
demonstrates
excellent
stability,
maintaining
consistent
operation
500
cm-2
least
250
hours.
Additionally,
an
anion
exchange
membrane
electrolyzer
incorporating
operated
continuously
over
hours
200
seawater.
This
highlights
significant
potential
robust
supports
fabrication
enduring
enhance
complex
environments.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 21, 2025
Hydrogen,
as
an
environmentally
sustainable
energy
carrier,
offers
substantial
potential
for
addressing
the
global
crisis.
The
development
of
highly
efficient
catalysts
to
accelerate
hydrogen
evolution
reaction
(HER)
is
critical
realization
electrochemical
production
via
water
splitting.
Herein,
a
novel
heterogeneous
catalyst
consisting
PtNi
nanoalloys
with
Pt-enriched
surfaces
obtained,
which
are
uniformly
distributed
within
nitrogen-doped
hollow
carbon
nanoshells
derived
from
complex
Ni-EDTA
(ethylene
diamine
tetraacetate).
Remarkably,
fabricated
NE-PtNiNC
demonstrates
exceptional
HER
performance,
exhibiting
ultra-low
overpotential
3
mV
at
10
mA
cm-2
and
6.8-fold
higher
mass
activity
compared
commercial
Pt/C
catalyst,
positioning
it
one
most
advanced
date.
Additionally,
shows
outstanding
stability
over
200
h
exhibits
promising
practical
deployment
in
two-electrode
electrolysis
systems.
Theoretical
analyses
further
reveal
that
Pt-skin@PtNi
structure,
its
lowest
d-band
center,
fosters
more
pronounced
overlap
5d
electron
cloud
surface
Pt
sites.
This
interaction
results
increased
density
on
skin,
facilitating
dissociation
significantly
enhancing
intrinsic
durability.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 19, 2024
Abstract
Electrocatalytic
water
splitting
is
an
attractive
approach
for
large‐scale
hydrogen
generation,
critical
global
carbon
neutrality.
However,
the
prevalent
commercialized
alkaline
electrolysis
generally
conducted
at
low
current
densities
due
to
sluggish
kinetics
and
high
overpotential,
severely
hampering
high‐efficiency
production.
Exploration
of
evolution
reaction
(HER)
electrocatalysts
that
can
reliably
operate
ampere‐level
under
overpotentials
thus
a
primary
challenge.
In
contrast
extensive
studies
using
powdery
electrocatalysts,
self‐supported
metallic
catalytic
cathode
has
become
burgeoning
direction
toward
densities,
owing
their
integrated
design
with
intensive
interfacial
binding,
conductivity
mechanical
stability
industrial
tolerance/adaption.
Recent
years
have
witnessed
tremendous
research
advances
in
designing
electrocatalysts.
Therefore,
this
flourishing
area
specially
summarized.
Beginning
introduction
theory
mechanism
HER,
engineering
strategies
on
electrodes
are
systematically
summarized,
including
metal
alloy
construction,
heterostructure
engineering,
doping
manipulation,
surface
design.
Meanwhile,
particular
emphasis
focused
relationship
between
structure,
activity,
HER.
Finally,
existing
challenges,
requirements
industrial‐scale
application,
future
aiming
provide
better
solution
electrolysis.
