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.
Langmuir,
Journal Year:
2023,
Volume and Issue:
39(48), P. 16994 - 17008
Published: Nov. 21, 2023
During
electrocatalytic
water
splitting,
the
management
of
bubbles
possesses
great
importance
to
reduce
overpotential
and
improve
stability
electrode.
Bubble
evolution
is
accomplished
by
nucleation,
growth,
detachment.
The
expanding
nucleation
sites,
decreasing
bubble
size,
timely
detachment
from
electrode
surface
are
key
factors
in
management.
Recently,
engineering
electrodes
has
emerged
as
a
promising
strategy
for
practical
splitting
due
its
reliability
efficiency.
In
this
review,
we
start
with
discussion
behavior
on
during
splitting.
Then
summarize
recent
progress
perspective
physical
(electrocatalytic
morphology)
chemical
(surface
composition)
considerations,
focusing
texture
design,
three-dimensional
construction,
wettability
coating
technology,
functional
group
modification.
Finally,
present
principles
management,
followed
an
insightful
critical
challenges
further
development.
The Journal of Physical Chemistry C,
Journal Year:
2024,
Volume and Issue:
128(5), P. 1936 - 1945
Published: Jan. 24, 2024
Iron-based
metal–organic
frameworks
(MOFs)
have
shown
potential
as
catalysts
for
the
electrocatalysis
oxygen
evolution
reaction
(OER).
Despite
numerous
methods
being
employed
to
enhance
OER
performance
of
MOFs,
influence
halogen-containing
linkers
on
electronic
structure
iron-based
MOF
remains
unexplored.
In
this
study,
a
series
Fe-based
MOFs
(denoted
MOF-R,
where
R
=
H,
Cl,
or
Br)
with
comparable
structures
are
synthesized
by
changing
organic
coordinated
Fe
metal
active
center,
aim
investigating
activity.
Significantly,
MOF-Br
exhibited
superior
activity
compared
MOF-Cl
and
MOF-H.
Density
functional
theory
calculations
reveal
that
tuning
halogen
groups
can
modulate
sites
effectively
regulate
adsorption
behavior
key
intermediates
near
optimal
d-band
leading
enhancement
electroactivity.
Notably,
bromine-substituted
catalyst
displayed
remarkable
intrinsic
activity,
including
low
overpotential
251.2
mV
at
current
density
10
mA
cm–2
Tafel
slope
44.5
dec–1,
surpassing
halogen-unsubstituted
MOF-H
(262.6
63.4
dec–1)
commercial
IrO2
(335.3
98.6
dec–1).
Moreover,
high
turnover
frequency
an
300
was
measured
be
0.537
s–1,
which
is
30
times
greater
than
(0.018
s–1).
This
research
offers
strategy
designing
electrocatalysts
laying
solid
foundation
rational
design
synthesis
excellent
in
future.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 16, 2024
Abstract
The
commercialization
of
water‐splitting
technology
strongly
relies
on
the
stable
and
high‐performance
electrocatalyst
for
hydrogen
oxygen
evolution
reactions
(HER‐OER).
In
this
work,
nickel
dopants
in
IrRu
alloyed
acidic
water
splitting
activity
are
investigated.
incorporation
induces
more
atoms
coordinating
with
Ir/Ru
facilitating
formation
*OOH
species
via
nucleophilic
attack
by
H
2
O.
Additionally,
a
fast
surface
reconstruction
is
achieved
due
to
electrochemical
dissolution
Ni
dopants;
as
result,
incorporated,
evidenced
situ
Raman
spectroscopy
impedance
spectroscopy.
Therefore,
mass
Ni@IrRu
enhanced
threefold
than
commercial
IrO
OER
catalysis.
Moreover,
balance
binding
strength;
only
609
mV
overpotential
demanded
reach
1
A
cm
−2
HER
polymer
electrolyte
membrane
electrolyzer
(PEMWE)
test
indicates
1.87
V
required
attain
,
160
lower
Pt/C‐IrO
revealing
its
potential
application
PEMWE.
Cell Reports Physical Science,
Journal Year:
2024,
Volume and Issue:
5(3), P. 101837 - 101837
Published: Feb. 20, 2024
Bubble
evolution
plays
a
vital
role
in
the
photoelectrochemical
(PEC)
water-splitting
process.
However,
quantitatively
relating
nucleation
site
distribution
to
bubble
dynamics
and
reaction
current
remains
elusive.
Here,
we
investigate
coalescence
detachment
processes
of
double
bubbles
with
different
spacing
(S)
using
electrochemical
measurements
high-speed
microscopic
imaging.
The
study
reveals
three
types
mode:
periodic
buoyancy-driven
mode,
transition
coalescence-driven
mode.
These
modes
are
influenced
by
process,
which
alters
S
results
changes
radius
frequency.
Meanwhile,
significant
differences
average
can
be
obtained
changing
at
same
potential.
This
elucidates
fundamental
relationship
between
characteristics,
provides
guidance
for
optimal
design
electrode
morphology
PEC
system.
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(1)
Published: Jan. 1, 2024
Understanding
and
controlling
hydrogen
bubble
growth
detachment
during
water
electrolysis
is
crucial
for
improving
its
efficiency.
This
study
investigates
dynamics
evolution
on
a
platinum
microelectrode
in
an
acidic
electrolyte
with
different
gas/electrolyte
surface
tensions
by
adding
varying
surfactant
concentrations.
Three
patterns
were
observed:
periodic
of
individual
bubbles
at
low
concentrations
0
1
×
10−7
M,
respectively;
one
or
two
small
are
formed
the
foot
single
main
intermediate
10−6
10−5
M;
large
aperiodic
release
tiny
higher
10−4
M.
The
concentration
Marangoni
force
H2
decreases
significantly
concentration.
results
shorter
cycles
from
138.12
to
6.98
s
−0.6
V
vs
saturated
calomel
electrode,
reduced
radii
765.95
359.54
μm
VSCE,
accelerated
growth.
finding
offers
new
way
control
electrochemical
formation.
Energy Reviews,
Journal Year:
2024,
Volume and Issue:
3(3), P. 100073 - 100073
Published: Feb. 9, 2024
The
Proton
Exchange
Membrane
(PEM)
water
electrolyzer
is
considered
promising
energy
storing
means
for
harnessing
variable
renewable
sources
to
produce
hydrogen.
Understanding
the
internal
fluid
dynamics,
which
are
often
challenging
directly
observe
experimentally,
has
prompted
use
of
numerical
models
investigate
two-phase
flow
within
PEM
electrolyzers.
In
this
study,
we
provide
a
comprehensive
review
prior
research
focusing
on
modeling
electrolyzers,
encompassing
both
components
at
mesoscopic
scales
and
full
macroscopic
level.
We
delve
into
specifics
various
approaches
different
summarize
discuss
current
state
art
in
field.
Presently,
predominantly
employ
homogeneous
assumption.
However,
microscopic
capable
tracking
phase
interfaces
limited
components.
Challenges
persist
integrating
model,
particularly
coupling
between
channels
porous
media.
Future
efforts
may
focus
developing
multi-scale
simulating
under
fluctuating
input
conditions.
Additionally,
given
structural
similarities
electrolyzers
fuel
cells,
compare
differences
two
technologies.
This
work
shall
offer
insights
researchers
field
