The
development
of
water
splitting
electrocatalysts
with
earth-abundant
materials
capable
delivering
high
current
density
is
crucial
for
sustainable
H2
production.
However,
the
mass
transfer
including
reactants
and
bubbles
usually
suffered
from
shielding
effect
gas
adhesion
under
such
circumstance.
Here,
we
report
a
surface
engineering
strategy
over
amorphous
molybdenum
sulfide
(a-MoSx)
to
synergistically
boost
its
generation
departure
bubbles.
To
begin
with,
hydrophilic
featuring
hydroxy
groups
was
constructed
via
palladium−doping
induced
sulfur
vacancies
on
a-MoSx,
which
could
enhance
local
access
aqueous
reactant.
Furthermore,
be
accelerated
by
regulating
roughness
synthesized
Pd-MoSx(OH)y
nanoarrays.
For
demonstration
practical
applications,
bifunctional
nanoarrays
deliver
1000
mA
cm−2
at
1.99
V
overall
100
hours,
outperformed
state-of-the-art
Pt/C||IrO2
electrolyzer.
Chemistry,
Год журнала:
2024,
Номер
6(5), С. 911 - 921
Опубликована: Сен. 3, 2024
In
order
to
explore
the
possibilities
of
increasing
hydrophilicity
carbon-based
adsorbents,
catalysts,
or
electrode
materials
in
aqueous
solutions,
oxidation
wood-based
activated
biochar
using
H2O2
was
investigated.
The
properties
oxidized
obtained
at
different
activation
temperatures
(600,
700,
and
800
°C)
for
15–180
min
were
investigated
characteristics
surface
functionality,
elemental
composition,
porous
structure,
contact
angle
measurements,
FTIR
spectroscopy,
immersion
calorimetry.
It
observed
that
optimal
time
each
sample
depending
on
temperature,
degree
can
be
tailored
by
changing
time.
course
depends
graphitization
functionalization,
determined
temperature.
established
highest
increase
wettability
is
samples
with
lowest
a
temperature
600
°C.
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 19, 2024
Abstract
The
adhesion
behavior
of
liquid
droplets
on
solid
surfaces
is
critical
for
natural
transportation
and
industrial
production.
In
particular,
microrobots
based
at
solid-liquid
interfaces
have
important
applications
in
chemical
reactions,
cargo
transport,
energy
harvesting.
However,
current
droplet-based
manipulation
strategies
primarily
depend
the
structures
or
reactions
between
to
achieve
programmable
movement,
while
robust
carrying
capacity
precise
synergistic
operation
multiple
remain
challenging.
Herein,
we
propose
a
maglev-like
transporter
system
(MDTs)
with
adjustable
conversion.
By
controlling
magnetic
fields
droplet
interfaces,
MDTs
can
precisely
climb
rotate,
as
well
efficiently
convert
mechanical
into
electricity
motion
monitoring
self-powered
devices.
These
findings
deepen
understanding
force
transport
co-directed
by
surface
wettability
fields,
broaden
utilization
these
systems
conversion,
offering
great
potential
contactless
blind
operation,
lossless
transfer
powerless
micro-electromechanical
(MEMS).
The
development
of
water
splitting
electrocatalysts
with
earth-abundant
materials
capable
delivering
high
current
density
is
crucial
for
sustainable
H2
production.
However,
the
mass
transfer
including
reactants
and
bubbles
usually
suffered
from
shielding
effect
gas
adhesion
under
such
circumstance.
Here,
we
report
a
surface
engineering
strategy
over
amorphous
molybdenum
sulfide
(a-MoSx)
to
synergistically
boost
its
generation
departure
bubbles.
To
begin
with,
hydrophilic
featuring
hydroxy
groups
was
constructed
via
palladium−doping
induced
sulfur
vacancies
on
a-MoSx,
which
could
enhance
local
access
aqueous
reactant.
Furthermore,
be
accelerated
by
regulating
roughness
synthesized
Pd-MoSx(OH)y
nanoarrays.
For
demonstration
practical
applications,
bifunctional
nanoarrays
deliver
1000
mA
cm−2
at
1.99
V
overall
100
hours,
outperformed
state-of-the-art
Pt/C||IrO2
electrolyzer.
