A systematic analysis of operating parameters for CO2 capture from seawater by Bipolar Membrane Electrodialysis (BPMED)
Separation and Purification Technology,
Journal Year:
2024,
Volume and Issue:
339, P. 126679 - 126679
Published: Feb. 4, 2024
Language: Английский
Molecularly Thin Nanosheet Films as Water Dissociation Reaction Catalysts Enhanced by Strong Electric Fields in Bipolar Membranes
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 15, 2025
Bipolar
membranes
(BPMs)
are
interesting
materials
for
the
development
of
next-generation
electrochemical
energy
conversion
and
separations
processes.
One
key
challenges
in
optimizing
BPM
performance
is
enhancing
rate
water
dissociation
(WD)
reaction.
While
electric
field
effects,
specifically
second
Wien
effect,
have
been
demonstrated
to
enhance
WD
reaction,
making
BPMs
with
low
overpotentials
using
primary
effects
has
difficult
achieve.
In
this
study,
we
constructed
an
abrupt
interfacial
structure
between
anion
exchange
membrane
(AEM)
cation
(CEM)
maximize
intensity
local
field.
A
film
densely
tiled,
molecularly
thin
titanium
oxide
nanosheets
was
deposited
as
layer
create
interface
studying
extreme
effects.
Although
nanosheet
films
exhibited
higher
reaction
resistance
compared
thicker
catalyst
layers
composed
nanoparticles
at
current
density,
they
showed
superior
densities,
where
strong
fields
were
present,
apparent
overpotential
0.25
V
300
mA
cm-2
extracted
from
impedance
measurements.
These
results
highlight
potential
by
maximizing
effect
through
utilization
two-dimensionally
assembled
films.
Language: Английский
Protocol for assembling and operating bipolar membrane water electrolyzers
STAR Protocols,
Journal Year:
2023,
Volume and Issue:
4(4), P. 102606 - 102606
Published: Nov. 3, 2023
Renewable
energy-driven
bipolar
membrane
water
electrolyzers
(BPMWEs)
are
a
promising
technology
for
sustainable
production
of
hydrogen
from
seawater
and
other
impure
sources.
Here,
we
present
protocol
assembling
BPMWEs
operating
them
in
range
feedstocks,
including
ultra-pure
deionized
seawater.
We
describe
steps
electrode
assembly
preparation,
electrolyzer
assembly,
electrochemical
evaluation.
For
complete
details
on
the
use
execution
this
protocol,
please
refer
to
Marin
et
al.
(2023).
Language: Английский
Ion-specific phenomena limit energy recovery in forward-biased bipolar membranes
Nature Chemical Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 20, 2024
Language: Английский
Exploring Bipolar Membranes for Electrochemical Carbon Capture
Published: May 12, 2023
Carbon
dioxide
(CO2)
must
be
removed
from
the
atmosphere
to
mitigate
negative
effects
of
climate
change.
However,
most
scalable
methods
for
removing
CO2
air
require
heat
fossil-fuel
combustion
produce
pure
and
continuously
regenerate
sorbent.
Bipolar-membrane
electrodialysis
(BPM-ED)
is
a
promising
technology
that
uses
renewable
electricity
dissociate
water
into
acid
base
bicarbonate-based
capture
solutions,
such
as
those
used
in
chemical
loops
direct-air-capture
(DAC)
processes,
also
direct-ocean
(DOC)
promote
atmospheric
drawdown
via
decarbonization
shallow
ocean.
lack
understanding
mechanisms
reactive
carbon
species
transport
BPMs
has
precluded
industrial-scale
deployment
BPM-ED.
In
this
study,
we
develop
an
experimentally-validated
1D
model
electrochemical
regeneration
solutions
seawater
using
Our
experimental
computational
results
demonstrate
out-of-equilibrium
buffer
reactions
within
BPM
drive
formation
at
BPM/electrolyte
interface
with
energy-intensities
less
than
150
kJ
mol-1.
high
rates
bubble
increase
energy
intensity
recovery
current
densities
>100
mA
cm−2.
Sensitivity
analyses
show
optimizing
removal
could
enable
bicarbonate
intensities
<100
mol−1
These
provide
design
principles
Language: Английский
Influence of the pH Gradient on Bipolar Membrane Operation
ACS electrochemistry.,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 23, 2024
Bipolar
membranes
(BPMs)
provide
a
key
framework
for
integration
of
earth
abundant
catalysts
in
energy
conversion
systems
and
development
water
purification
systems.
Efficient
BPM
operation
requires
dissociation
(WD)
the
BPM;
however,
understanding
catalyzed
WD
process
impact
operating
conditions
have
remained
limited.
Here,
Nafion-Aemion
BPMs
employing
known
(graphene
oxide,
aluminum
hydroxide,
titanium
iridium
oxide)
were
investigated
using
electrochemical
analyses
as
function
catalyst
loading
pH
gradient
up
to
50
mA
cm–2.
Altered
loadings
allowed
balance
between
field
strength
utilization
be
observed,
while
control
provided
insight
into
layer
limiting
process.
These
results
then
related
current–voltage
expression
operation,
where
number
ionizable
sites
available
proton
transfer
processes,
space
charge
region
thickness
at
interface,
dielectric
constant
are
factors.
Graphene
oxide
was
limited
by
hydroxide
formation
near
anion
exchange
layer;
cation
layer,
both
processes.
exhibited
high
activity,
attributed
low
constants
structure.
indicate
areas
improving
methods
determine
Language: Английский