Catalysts,
Journal Year:
2024,
Volume and Issue:
14(8), P. 491 - 491
Published: July 31, 2024
Tuning
the
chemical
and
structural
environment
of
Ru-based
nanomaterials
is
a
major
challenge
for
achieving
active
stable
hydrogen
evolution
reaction
(HER)
electrocatalysis.
Here,
we
anchored
ultrafine
Ru
nanoparticles
(with
size
~4.2
nm)
on
hierarchical
Ni2P
array
(Ru/Ni2P)
to
enable
highly
efficient
HER.
The
promoter
weakened
adsorption
proton
sites
by
accepting
electrons
from
nanoparticles.
Moreover,
endowed
catalysts
with
large
surface
area
open
structure.
Consequently,
as-fabricated
Ru/Ni2P
electrode
displayed
low
overpotential
57
164
mV
at
HER
current
densities
10
50
mA
cm−2,
respectively,
comparable
state-of-the-art
Pt
catalysts.
can
operate
stably
96
h
cm−2
without
performance
degradation.
After
pairing
commercial
RuO2
anode,
anode
catalyzed
overall
water
splitting
1.73
V
density
which
was
0.16
lower
than
its
Ni
counterpart.
In
situ
Raman
studies
further
revealed
optimized
Ru-active
promoter,
thus
enhancing
electrocatalytic
performance.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
Seawater
electrolysis
powered
by
renewable
energy
is
a
promising
technique
for
green
hydrogen
production.
However,
the
high
concentration
of
chloride
ions
(Cl–)
and
their
derivatives
in
seawater
can
severely
corrode
anode
catalyst,
significantly
challenging
lifespan
electrolyzers.
Herein,
we
present
poly(acid
yellow
17)
(PAY)
layer-modified
CoFe-layered
double
hydroxide
nanoarrays
on
nickel
foam
(CoFe
LDH@PAY/NF),
which
serves
as
an
efficient
stable
electrocatalyst
alkaline
oxidation
(ASO).
PAY
layer
functions
electrically
conductive
layer,
enhances
conductivity
CoFe
LDH/NF
thus
improves
catalytic
activity
ASO.
Moreover,
sulfonic
acid
groups
create
negatively
charged
environment
surface
LDH/NF,
effectively
repelling
Cl–,
while
chlorine
atoms
form
Cl–-free
protective
surface.
These
two
mechanisms
work
synergistically
to
stabilize
process.
Electrochemical
test
data
indicate
that
LDH@PAY/NF
achieves
current
density
1000
mA
cm–2
at
just
336
mV
The
demonstrated
superb
stability,
exhibiting
slight
degradation
after
800
h
ASO
under
cm–2.
This
provides
important
guidance
developing
catalysts
resistant
Cl–
corrosion
during
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 14, 2025
Sustainable
water
electrolysis
has
emerged
as
a
future
technology
for
producing
green
hydrogen.
The
general
approach
to
improving
water-splitting
hydrogen
production
is
develop
novel
electrode
materials.
In
this
work,
we
reported
an
orthogonal
approach,
namely,
regulating
the
electrolyte
components.
As
proof
of
concept,
Na2S
additive
was
introduced
electrolytes
enhance
performance
Ni-based
electrodes.
Specifically,
tiny
amount
(50
mM)
employed
reduce
evolution
overpotential
Ni(OH)2
from
262
193
mV
at
10
mA
cm-2.
situ
Raman
studies
unveiled
formation
NiS
active
phase
and
S-H
bond
during
electrocatalysis,
which
were
responsible
such
improvement.
Moreover,
strategy
also
showed
its
success
in
other
materials
metallic
Ni
foam,
saline
water,
catalytic
reaction
systems
oxygen
evolution.
Catalysts,
Journal Year:
2025,
Volume and Issue:
15(6), P. 507 - 507
Published: May 22, 2025
Electrocatalysis
represents
a
critical
branch
of
catalysis
research,
characterized
by
its
interdisciplinary
nature
and
drawing
interest
from
chemists,
physicists,
biochemists,
surface
scientists,
materials
engineers
[...]
