Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 18, 2025
Abstract
The
hydrogen
(H
2
)
evolution
reaction
(HER)
is
a
pivotal
process
in
the
production
of
green
H
,
which
will
play
crucial
role
future
sustainable
energy
systems.
Despite
extensive
efforts
to
optimize
catalyst
activity,
great
challenges
related
mass
transfer
at
electrode
interface
still
impede
improvement
HER
efficiency.
Here,
catalytic
system
inspired
designed
by
desert‐beetle's
hydrophilic/hydrophobic
patterned
back,
natural
structure
capable
condensing
and
transporting
fog
droplets.
This
composed
superaerophobic
(SAB)
electrocatalytic
dots
surrounded
with
superaerophilic
(SAL)
coating,
can
efficiently
enhance
gaseous
dissolved
achieve
exceptional
performance.
Such
desert
beetle‐inspired
using
platinum
(Pt)
as
achieves
an
excellent
current
density
(−1252
mA
cm
−2
−0.5
V
versus
RHE,
times
higher
than
conventional
Pt
(−408.5
).
overpotential
required
−10
only
−7
mV,
compared
−25
mV
on
electrode.
also
applicable
various
catalysts
(e.g.,
Re‐Co,
Co‐Cu,
Co‐Mo,
Cu‐Mo,
Ni‐Mo),
exhibit
minimum
200%
increase,
their
structures.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 11, 2024
Gas
bubbles
generated
by
the
hydrogen
evolution
reaction
and
oxygen
during
water
electrolysis
influence
energy
conversion
efficiency
of
production.
Here,
we
survey
what
is
known
about
interaction
gas
electrode
surfaces
on
practicable
devices
used
for
electrolysis.
We
outline
physical
processes
occurring
life
cycle
a
bubble,
summarize
techniques
to
characterize
phenomena
in
situ
practical
device
environments,
discuss
ways
that
electrodes
can
be
tailored
facilitate
removal
at
high
current
densities.
Lastly,
review
efforts
model
behavior
individual
multiphase
flows
produced
gas-evolving
electrodes.
conclude
our
with
short
summary
outstanding
questions
could
answered
future
electrochemical
environments
or
improved
simulations
flows.
PRX Energy,
Journal Year:
2025,
Volume and Issue:
4(1)
Published: March 21, 2025
While
the
dynamics
of
hydrogen
bubbles
during
water
electrolysis
have
been
intensively
studied
in
recent
years,
adequate
insights
into
oxygen
are
still
lacking.
Therefore,
this
study
presents
a
comparative
analysis
and
bubble
potentiostatic
an
acidic
electrolyte.
Complementary
optical
techniques,
such
as
high-speed
shadowgraphy,
particle
tracking
velocimetry,
schlieren
imaging
applied
to
measure
geometric
features
evolving
microscale
Marangoni
convection,
well
refractive
index
field
around
growing
bubbles.
Distinct
differences
between
found
average
current,
convection
pattern,
degree
reduction
at
foot,
suggesting
synergetic
action
both
thermal
solutal
effects
Published
by
American
Physical
Society
2025
Small Methods,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 16, 2025
Abstract
Electrocatalytic
water
splitting
for
hydrogen
generation
plays
a
crucial
role
in
promoting
the
energy
transition
and
achieving
goals
of
carbon
neutrality.
Nevertheless,
context
electrolysis,
generated
bubbles
have
an
adverse
impact
on
consumption
mass
transfer
efficiency.
To
address
this
challenge,
variety
strategies
are
investigated
to
accelerate
bubble
detachment
transport.
It
is
utmost
significance
summarize
those
facilitating
advancement
electrolysis
performance.
In
review,
comprehensive
account
presented
enhancing
performance
through
behavior
management.
First,
electrolyte
discussed.
Then,
optimized
interactions
between
electrode
surface
introduced,
which
focus
reducing
adhesion
forces
implementing
other
forces.
Next,
dynamic
bubbling
deformable
catalysts
discussed,
such
as
fern‐
caterpillar‐like
catalysts.
Following
that,
bubble‐bubble
coalescence
proved
be
beneficial
earlier
departure
compared
buoyancy
effect
alone.
Finally,
outlooks
future
development
efficient
removal
enhanced
The
review
aims
deepen
comprehension
stimulate
management
strategies,
thereby
further
electrolysis.
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(7)
Published: July 1, 2024
Bubbles
generated
during
electrochemical
water
splitting
could
adhere
to
the
electrode
surface
and
therefore
impede
reaction.
Thus,
understanding
manipulating
evolution
dynamics
of
bubbles
is
crucial
for
enhancing
electrolysis
efficiency.
In
this
study,
we
investigated
mechanism
forces
acting
on
individual
hydrogen
bubble
Pt
microelectrode
by
employing
different
H2SO4
electrolyte
concentrations
(0.2–1.0
M)
under
various
applied
voltages
[−2
−6
V
vs
saturated
calomel
(SCE)].
We
focused
detachment
diameter,
average
current,
lifetime
subsequently
established
relational
equations
over
these
variables.
At
SCE,
growth
coefficient
has
a
maximum
value
14.42
×
10−4
m/s0.333
when
concentration
around
0.6
M.
Gas
production
at
M
increased
63.4%
compared
0.2
11.2%
1.0
Therefore,
choosing
appropriate
can
maximize
gas
Additionally,
force
balance
model
incorporating
Marangoni
single
was
across
varying
electrolyte.
−4
solutal
starts
dominate
above
0.4
The
results
demonstrate
critical
role
beyond
certain
concentration.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Abstract
Enhancing
critical
heat
flux
(CHF)
and
transfer
coefficient
(HTC)
by
promoting
the
nucleation,
growth,
departure
of
boiling
bubbles
has
drawn
significant
attention
owing
to
its
wide
applications.
However,
in‐depth
understanding
comprehensive
manipulation
under‐liquid
bubble
dynamics
from
in
situ
microscale
perspectives
remain
challenging.
Herein,
observations
analyses
microsized
ultra‐low
surface
tension
fluorinated
liquids
(FLs)
are
conducted
on
superaerophobic
silicon
surfaces
with
crisscross
microchannels
selective
nanowires.
It
is
revealed
that
deep
yet
short
nanowires
enable
ultrafast
liquid
spreading
(<549.6
ms)
ultralow
adhesion
(≈1.1
µN),
while
an
appropriate
spacing
(240–600
µm)
between
minimizes
time
(<20.6
due
timely
coalescence.
By
verifying
above
principles
through
collaborative
enhancement
CHF
HTC,
optimized
structure
(microchannel
depth
≈52.9
µm,
microchannel
≈362.9
nanowire
length
≈0
nm)
obtained
further
implemented
onto
exposed
Si
a
commercial
CPU
chip.
Cooled
phase‐change
FLs,
average
temperature
maintains
≈64.9
°C
even
under
extreme
power
loads
(≈130
W),
far
below
than
those
conventional
air‐cooling
water‐cooling
operations.
