Solutal Marangoni effect influencing bubble dynamics with varied electrolyte compositions
Electrochimica Acta,
Год журнала:
2024,
Номер
unknown, С. 145448 - 145448
Опубликована: Дек. 1, 2024
Язык: Английский
Solutal Marangoni effects on growing hydrogen and oxygen bubbles in alkaline water electrolysis
Faeze Khalighi,
A.W. Vreman,
Yali Tang
и другие.
Chemical Engineering Science,
Год журнала:
2025,
Номер
unknown, С. 121577 - 121577
Опубликована: Март 1, 2025
Язык: Английский
Effects of the boundary conditions at the gas-liquid interface on single hydrogen bubble growth in alkaline water electrolysis
Faeze Khalighi,
A.W. Vreman,
Yali Tang
и другие.
Chemical Engineering Science,
Год журнала:
2024,
Номер
301, С. 120666 - 120666
Опубликована: Авг. 30, 2024
Язык: Английский
Boosting Electrode Performance and Bubble Management via Direct Laser Interference Patterning
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 30, 2025
Laser-structuring
techniques
like
Direct
Laser
Interference
Patterning
show
great
potential
for
optimizing
electrodes
water
electrolysis.
Therefore,
a
systematic
experimental
study
is
performed
to
analyze
the
influence
of
spatial
period
and
aspect
ratio
between
structure
depth
on
electrode
performance
pure
Ni
electrodes.
Using
statistical
design
experiments
approach,
it
found
that
distance
laser-structures
decisive
processing
parameter
improvement
performance.
Thus,
electrochemically
active
surface
area
could
be
increased
by
factor
12
compared
nonstructured
electrode.
For
oxygen
evolution
reaction,
significantly
lower
onset
overpotential
(≈
−164
mV
at
100
mA
cm–2)
found.
This
explained
superhydrophilic
structured
bubble
growth,
which
leads
number
nucleation
sites
and,
simultaneously,
larger
detached
bubbles.
Combined
with
fully
wetted
surface,
this
results
in
reduced
blocking
thus,
ohmic
resistance.
Язык: Английский
Unveiling micro- and nanoscale bubble dynamics for enhanced electrochemical water splitting
Advances in Colloid and Interface Science,
Год журнала:
2025,
Номер
343, С. 103544 - 103544
Опубликована: Май 10, 2025
Язык: Английский
Electrolyte droplet spraying in H2 bubbles during water electrolysis under normal and microgravity conditions
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Май 16, 2025
Electrolytically
generated
gas
bubbles
can
significantly
hamper
the
overall
electrolysis
efficiency.
Therefore
it
is
crucial
to
understand
their
dynamics
in
order
optimise
water
electrolyzer
systems.
Herein,
we
elucidate
a
distinct
transport
mechanism
whereby
electrolyte
droplets
are
sprayed
into
H2
bubbles.
These
arise
from
fragmentation
of
Worthington
jet,
which
engendered
by
coalescence
with
microbubbles.
The
robustness
this
phenomenon
corroborated
under
both
normal
and
microgravity
conditions.
Reminiscent
bursting
on
liquid-gas
interface,
spraying
results
flow
inside
bubble.
This
couples,
an
intriguing
way,
thermocapillary
convection
at
bubble's
surface,
clearly
underlining
high
interfacial
mobility.
In
case
electrode-attached
bubbles,
form
puddles
affecting
near
three-phase
contact
line
favoring
bubble
detachment
electrode.
work
unravel
important
insights
physico-chemical
aspects
electrolytic
integral
for
optimizing
gas-evolving
electrochemical
Язык: Английский
Self-similar solution for laminar bubbly flow evolving from a vertical plate
Journal of Fluid Mechanics,
Год журнала:
2024,
Номер
996
Опубликована: Окт. 2, 2024
The
development
of
a
bubble
plume
from
vertical
gas-evolving
electrode
is
driven
by
buoyancy
and
hydrodynamic
dispersion.
This
canonical
fluid
mechanics
problem
relevant
for
both
thermal
electrochemical
processes.
We
adopt
mixture
model
formulation
the
two-phase
flow,
considering
variable
density
(beyond
Boussinesq),
viscosity
Introducing
new
change
coordinates,
inspired
Lees–Dorodnitsyn
transformation,
we
obtain
self-similar
solution
laminar
boundary
layer
equations.
results
predict
wall
gas
fraction
thickness
that
increase
with
height
to
power
1/5
before
asymptotically
reaching
unity
scaling
2/5,
respectively.
velocity
scales
3/5.
Our
analysis
shows
self-similarity
only
possible
if
conservation
entirely
formulated
in
terms
specific
volume
instead
fraction.
Язык: Английский