Advanced Science,
Journal Year:
2022,
Volume and Issue:
10(4)
Published: Dec. 11, 2022
Abstract
Alkaline
water
electrolysis
(AWE)
is
among
the
most
developed
technologies
for
green
hydrogen
generation.
Despite
tremendous
achievements
in
boosting
catalytic
activity
of
electrode,
operating
current
density
modern
electrolyzers
yet
much
lower
than
emerging
approaches
such
as
proton‐exchange
membrane
(PEMWE).
One
dominant
hindering
factors
high
overpotentials
induced
by
gas
bubbles.
Herein,
bubble
dynamics
via
creating
superaerophobic
electrode
assembly
optimized.
The
patterned
Co‐Ni
phosphide/spinel
oxide
heterostructure
shows
complete
wetting
droplet
with
fast
spreading
time
(≈300
ms)
whereas
underwater
repelling
180°
contact
angle
achieved.
Besides,
collector/electrode
interface
also
modified
coating
aerophobic
hydroxide
on
Ti
collector.
Thus,
zero‐gap
electrolyzer
test,
a
3.5
A
cm
−2
obtained
at
2.25
V
and
85
°C
6
m
KOH,
which
comparable
state‐of‐the‐art
PEMWE
using
Pt‐group
metal
catalyst.
No
major
performance
degradation
or
materials
deterioration
observed
after
330
h
test.
This
approach
reveals
importance
management
AWE,
offering
promising
solution
toward
high‐rate
electrolysis.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(26)
Published: March 27, 2023
Abstract
Oil–water
separation
membranes
easily
fail
to
oil
foulants
with
low
surface
energy
and
high
viscosity,
which
severely
limits
these
membranes’
applications
in
treating
oily
wastewater.
Herein,
an
oil–water
membrane
by
bioinspired
bubble‐mediated
antifouling
strategy
is
fabricated
via
growing
hierarchical
cobalt
phosphide
arrays
on
stainless
steel
mesh.
The
as‐prepared
superhydrophilic/superaerophobic
electrocatalytic
for
hydrogen
evolution
under
water,
helps
rapidly
generate
release
abundant
microbubbles
surrounding
the
oil‐fouled
region
membrane.
These
can
spontaneously
coalesce
increase
their
buoyancy
warp
interface
tension
morphing
shape.
And
this
spontaneous
coalescence
also
increases
kinetic
of
resulting
from
decreased
bubbles’
potential
energy.
synergy
warped
tension,
increased
buoyancy,
drives
efficiently
dynamic
This
even
remove
some
solid
sediment
such
as
sand
particles
that
causes
more
serious
fouling
Thus,
maintains
flux
(>11920
L
m
−2
h
−1
bar
)
long‐term
oil–sand–water
emulsions
dynamically
recovering
decayed
demand,
exhibits
great
industrial
Energy Reviews,
Journal Year:
2023,
Volume and Issue:
2(1), P. 100015 - 100015
Published: Jan. 14, 2023
Bubbles
are
known
to
affect
energy
and
mass
transfer
in
gas-evolving
electrodes,
including
those
water
splitting,
chlorine
generation,
direct
methanol
fuel
cells,
carbon
dioxide
generation.
As
bubbles
vigorously
evolve
electrochemical
reactions,
undesired
blockage
of
active
sites
ion
conducting
pathways
result
serious
losses.
Since
new
advances
made
with
the
development
theories,
materials,
techniques,
this
review
discusses
recent
works
on
promoting
bubble
removal
systems
aim
guiding
motivating
future
research
area.
We
first
provide
mechanism
evolution
resultant
overpotentials
detail.
Then,
mitigating
issues
presented
from
perspectives
passive
strategies.
Passive
strategies
act
macro-
micro-structures
electrode,
surface
wettability,
electrolyte
properties.
Active
employ
out-fields,
flowing
electrolytes,
acoustic
fields,
magnetic
forces,
photothermal
effects,
guide
out
reaction
aiming
at
high
rates,
whereas
external
is
needed.
Finally,
pros
cons
both
outlooks
presented.
This
leads
design
guidelines
for
high-performance
systems.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(40)
Published: Aug. 14, 2023
In
the
pursuit
of
long-term
stability
for
oxygen
evolution
reaction
(OER)
in
seawater,
retaining
intrinsic
catalytic
activity
is
essential
but
has
remained
challenging.
Herein,
we
developed
a
Nix
Cry
O
electrocatalyst
that
manifested
exceptional
OER
alkaline
condition
while
improving
over
time
by
dynamic
self-restructuring.
1
M
KOH,
required
overpotentials
only
270
and
320
mV
to
achieve
current
densities
100
500
mA
cm-2
,
respectively,
with
excellent
exceeding
475
h
at
280
.
The
combination
electrochemical
measurements
situ
studies
revealed
leaching
redistribution
Cr
during
prolonged
electrolysis
resulted
increased
electrochemically
active
surface
area.
This
eventually
enhanced
catalyst
porosity
improved
activity.
was
further
applied
real
seawater
from
Red
Sea
(without
purification,
KOH
added),
envisaging
dynamically
evolving
can
offset
adverse
site-blocking
effect
posed
impurities.
Remarkably,
exhibited
stable
operation
2000,
275
10,
respectively.
proposed
mechanistic
insights
represented
step
towards
realization
non-noble
metal-based
direct
splitting.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(7), P. 8717 - 8732
Published: Feb. 7, 2024
Urea
electrolysis
is
a
promising
energy-efficient
hydrogen
production
process
with
environmental
benefits,
but
the
lack
of
efficient
and
sustainable
ampere-level
current
density
electrocatalysts
fabricated
through
simple
methods
major
challenge
for
commercialization.
Herein,
we
present
an
stable
heterostructure
electrocatalyst
full
urea
water
in
convenient
time-efficient
preparation
manner.
Overall,
superhydrophilic/superaerophobic
CoMn/CuNiP/NF
exhibits
exceptional
performance
evolution
reaction
(HER)
(-33.8,
-184.4,
-234.8
mV
at
-10,
-500,
-1000
mA
cm
