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.
