Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(21), P. 20155 - 20168
Published: Oct. 10, 2024
In
the
process
of
electrocatalytic
water
splitting,
managing
gaseous
products
is
crucial.
Rapid
gas
diffusion
on
electrode
surface
can
accelerate
mass
transfer,
thereby
enhancing
energy
conversion
efficiency.
recent
years,
regulation
wettability
through
compositional
and
structural
engineering
has
garnered
significant
attention.
this
review,
we
first
introduce
generation
detachment
processes
bubbles
explore
their
impact
transport
transfer
in
water-splitting
reactions,
emphasizing
importance
efficient
improving
catalyst
activity
stability.
Subsequently,
delve
into
fundamental
principles
discuss
design
potential
mechanisms
for
efficiency
chemical
modification,
design,
gradient
design.
Finally,
propose
future
research
directions
field.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(14), P. 10177 - 10186
Published: March 27, 2024
The
evolution
of
electrogenerated
gas
bubbles
during
water
electrolysis
can
significantly
hamper
the
overall
process
efficiency.
Promoting
departure
electrochemically
generated
(water)
is
therefore
beneficial.
For
a
single
bubble,
from
electrode
surface
occurs
when
buoyancy
wins
over
downward-acting
forces
(e.g.,
contact,
Marangoni,
and
electric
forces).
In
this
work,
dynamics
pair
H2
produced
hydrogen
reaction
in
0.5
M
H2SO4
using
dual
platinum
microelectrode
system
systematically
studied
by
varying
distance
cathodic
potential.
By
combining
high-speed
imaging
electrochemical
analysis,
we
demonstrate
importance
bubble–bubble
interactions
process.
We
show
that
bubble
coalescence
may
lead
to
substantially
earlier
as
compared
effects
alone,
resulting
considerably
higher
rates
at
constant
However,
due
continued
mass
input
conservation
momentum,
repeated
events
with
close
drive
departed
back
beyond
critical
current,
which
increases
spacing.
latter
leads
resumption
growth
near
surface,
followed
buoyancy-driven
departure.
While
less
favorable
small
spacing,
configuration
proves
be
very
beneficial
larger
separations,
increasing
mean
current
up
2.4
times
under
conditions
explored
study.
Inorganic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
11(14), P. 4080 - 4106
Published: Jan. 1, 2024
This
summary
describes
the
effects
of
wettability,
local
pH,
interfacial
water
structure,
and
electrolyte
composition
on
interface
reactant
compositions,
key
intermediate
adsorption,
reaction
kinetics.
Coordination Chemistry Reviews,
Journal Year:
2024,
Volume and Issue:
521, P. 216112 - 216112
Published: Aug. 24, 2024
Electro-induced
water
splitting
module
is
a
fascinating
strategy
for
the
conversion
of
electricity
into
scalable
and
clean
H
2
as
future
energy
carrier
has
significantly
attracted
attention
scientific
community.
Despite
countless
research
on
electrolyzers,
cost-effective
durable
electrode
materials
with
high
efficiency
remain
challenge
dream
in
this
quest.
This
critical
review
devoted
to
systemically
presenting
upsurge
recently
rationally
explored
highly
stable
benchmark
electrocatalysts
(both
noble
non-noble)
understand
design
principles,
performances,
compelling
reasons/chemistry
behind
enhanced
catalytic
potential
over
traditional
half-cell
oxygen
evolution
reaction
(OER)
hydrogen
(HER).
Moreover,
(at
least
≥50
h)
their
bi-functional
conduct
evaluated
prototype
electrolyzer
integrated
photovoltaic
(PV)
or
batteries
at
laboratory
level
are
discussed,
yet
an
untold
unsummarized
story
electrochemical
splitting.
Next,
current
status
technology,
socio-economic
challenges,
possible
solutions,
key
considerations
fundamental
principles/concepts
scheme
outlined
from
point
practical
application.
Typical
challenges
regarding
identifying,
preparing,
scaling
electrocatalysts,
but
foundations
now
strong,
outlook
visible
exciting
next-generation
technology.
•
Critical
Benchmark
Understanding
performances
mechanistic
studies
scrutiny
technology
Long
term
stability
electrocatalyst
Full
cell
investigation
PV
integration
ACS Catalysis,
Journal Year:
2025,
Volume and Issue:
unknown, P. 3823 - 3835
Published: Feb. 18, 2025
Due
to
their
high
electronic
conductivity,
catalytic
activity,
and
superior
chemical
stability,
nickel
nitrides
sulfides
have
been
demonstrated
be
cost-effective
robust
electrocatalysts
for
achieving
HER
under
alkaline
conditions.
Herein,
we
report
on
a
simple
optimized
approach
directly
grow
single-phase
nitride
(Ni3N)
sulfide
(Ni3S2)
flat
substrate.
Different
preparation
conditions
are
tested
in
order
achieve
materials
exhibiting
the
best
electrocatalytic
efficiency
HER.
The
Ni3N
Ni3S2
obtained
at
700
°C
30
min
ammonia
gas
flow
350
1
h
10%
H2S/H2
mixture,
respectively.
operate
M
KOH
more
efficiently
than
Ni3S2,
as
supported
by
overpotential
values
of
0.189,
0.291,
0.342
V
measured
10,
100,
200
mA
cm–2,
respectively,
which
lower
those
i.e.,
0.204,
0.351,
0.417
V.
Remarkably,
it
is
worth
noticing
that
its
activity
competes
with
Pt
current
densities
higher
cm–2.
Its
corroborated
additional
cyclic
voltammetry
(Tafel
slopes)
electrochemical
impedance
spectroscopy
measurements.
Moreover,
found
stable
over
45
electrolysis
10
cm–2
potential
change
only
24
31
mV,
To
gain
further
understanding
activities
both
materials,
density
functional
theory
(DFT)
calculations
an
situ
bubble
dynamics
study
performed.
Owing
hydrophilic
character
Ni3N,
smaller
H2
bubbles
form
detach
rapidly
from
surface
leads
fast
renewal
active
In
contrast,
size
retention
time
increase,
leading
adverse
blockage
sites
requiring
This
observation
perfectly
aligns
DFT
calculations,
show
H2O
adsorption
predominantly
favored
surface.
Our
work
highlights
use
planar
electrocatalyst
support
instead
foam-type
porous
one
essential
evaluate
alone
contribution
electrogenerated
consequently
impact
performance.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
124(17), P. 10052 - 10111
Published: Aug. 28, 2024
Bubbles
play
a
ubiquitous
role
in
electrochemical
gas
evolution
reactions.
However,
mechanistic
understanding
of
how
bubbles
affect
the
energy
efficiency
processes
remains
limited
to
date,
impeding
effective
approaches
further
boost
performance
systems.
From
perspective
analogy
between
heat
and
mass
transfer,
reactions
exhibit
highly
similar
dynamic
behaviors
them
liquid–vapor
phase
change.
Recent
developments
change
systems
have
substantially
advanced
fundamental
knowledge
bubbles,
leading
unprecedented
enhancement
transfer
performance.
In
this
Review,
we
aim
elucidate
promising
opportunity
bubble
dynamics
through
lens
transfer.
We
first
provide
background
about
key
parallels
Then,
discuss
across
multiple
length
scales,
with
an
emphasis
on
exciting
research
problems
inspired
by
new
insights
gained
from
Lastly,
review
advances
engineered
surfaces
for
manipulating
enhance
providing
outlook
design
high-performance
evolving
electrodes.
Inorganic Chemistry Frontiers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Direct
seawater
electrolysis
technology
shows
great
potential,
but
chloride
ions
corrode
the
electrodes
and
cause
competitive
reactions,
which
limits
its
application.
