A
bipolar
membrane
(BPM)
was
prepared
by
the
layer-by-layer
solution
casting
method
(in
the
same
solvent
to
achieve
good
adhesion
between
the
layers).
Thin
films
of
different
metal
alkoxides
(M(OR)n,
where
M
is
Si,
Ti
or
Zr,
and
R
is
(CH2)n CH3)
were
used
as
interfacial
layers
(ILs),
which
were
sand
wiched
between
heterogeneous
anion-exchange
layers
(AELs)
and
homogeneous
cation-exchange
layers
(CELs)
of
sulfonated
poly
(ether
sulfone)
(SPS).
The
CELs
and
the
AELs
were
separately
evaluated
for
their
physicochemical
and
electrochemical
properties.
BPMs
prepared
with
ILs
(containing
different
metal
alkoxides)
showed
good
stability
and
low
resistance.
Current–voltage
(i–V)
curves
were
explained
in
terms
of
the
first
limiting
current
density
(ilim1),
the
second
limiting
current
density
(ilim2),
the
water
dissociation
potential
(Vdiss),
the
water
dissociation
resistance
(Rdiss)
and
the
operational
area
resistance
(Rop).
The
catalytic
activity
of
the
metal
alkoxides
improved
the
water
dissociation
performance
of
the
BPMs.
The
BPM–SiOH
performed
better
than
the
commercially
available
BPMs.
Furthermore,
electrodial
ysis
with
a
bipolar
membrane
(EDBPM)
experiments
confirmed
that
water
dissociation
occurred
at
the
BPM
interface
and
thus
acid
and
base
formation
occurred
A
bipolar
membrane
(BPM)
was
prepared
by
the
layer-by-layer
solution
casting
method
(in
the
same
solvent
to
achieve
good
adhesion
between
the
layers).
Thin
films
of
different
metal
alkoxides
(M(OR)n,
where
M
is
Si,
Ti
or
Zr,
and
R
is
(CH2)n CH3)
were
used
as
interfacial
layers
(ILs),
which
were
sand
wiched
between
heterogeneous
anion-exchange
layers
(AELs)
and
homogeneous
cation-exchange
layers
(CELs)
of
sulfonated
poly
(ether
sulfone)
(SPS).
The
CELs
and
the
AELs
were
separately
evaluated
for
their
physicochemical
and
electrochemical
properties.
BPMs
prepared
with
ILs
(containing
different
metal
alkoxides)
showed
good
stability
and
low
resistance.
Current–voltage
(i–V)
curves
were
explained
in
terms
of
the
first
limiting
current
density
(ilim1),
the
second
limiting
current
density
(ilim2),
the
water
dissociation
potential
(Vdiss),
the
water
dissociation
resistance
(Rdiss)
and
the
operational
area
resistance
(Rop).
The
catalytic
activity
of
the
metal
alkoxides
improved
the
water
dissociation
performance
of
the
BPMs.
The
BPM–SiOH
performed
better
than
the
commercially
available
BPMs.
Furthermore,
electrodial
ysis
with
a
bipolar
membrane
(EDBPM)
experiments
confirmed
that
water
dissociation
occurred
at
the
BPM
interface
and
thus
acid
and
base
formation
occurred
การแปล กรุณารอสักครู่..