Chemistry - An Asian Journal,
Journal Year:
2023,
Volume and Issue:
19(4)
Published: Dec. 26, 2023
The
endeavor
to
develop
high-performance
electrochemical
energy
applications
has
underscored
the
growing
importance
of
comprehending
intricate
dynamics
within
an
electrode's
structure
and
their
influence
on
overall
performance.
This
review
investigates
complexities
electrode-ionomer
interactions,
which
play
a
critical
role
in
optimizing
reactions.
Our
examination
encompasses
both
microscopic
meso/macro
scale
functions
ionomers
at
interface,
providing
thorough
analysis
how
these
interactions
can
either
enhance
or
impede
surface
Furthermore,
this
explores
broader-scale
implications
ionomer
distribution
porous
electrodes,
taking
into
account
factors
like
types,
electrode
ink
formulation,
carbon
support
interactions.
We
also
present
evaluate
state-of-the-art
techniques
for
investigating
distribution,
including
methods,
imaging,
modeling,
analytical
techniques.
Finally,
performance
phenomena
are
discussed
context
conversion
devices.
Through
comprehensive
exploration
contributes
ongoing
advancements
field
research,
ultimately
facilitating
design
development
more
efficient
sustainable
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(11), P. 5704 - 5780
Published: Jan. 1, 2024
This
review
provides
a
depth
of
knowledge
on
the
synthesis,
properties
and
performance
aryl
ether-free
anion
exchange
polymer
electrolytes
for
electrochemical
energy
devices.
Traditional
CO2
reduction
systems
often
fail
in
an
alkaline
environment
due
to
the
interaction
of
with
a
high-pH
electrolyte,
where
carbonate
and
bicarbonate
ion
formation
results
potassium-containing
salt
precipitation.
The
presence
crystals
causes
selectivity
electrolyzer
toward
conversion.
Here,
critical
operational
variables,
which
elicit
salting
out
process,
are
investigated
(i.e.,
transport).
When
exceeds
current
density,
H2
evolution
dominates
formation,
is
confirmed
by
postmortem
cross-sectional
SEM-EDS
electrode.
density
decreases
increasing
membrane
thickness
or
anolyte
ionic
strength.
Cathode
mediated
unmitigated
crossover
cations
from
cathode
across
anion
exchange
membrane,
through
imperfectly
excluded.
It
likely
that
electric
field-driven
migration
promotes
increase
concentration
potassium
until,
at
for
arrangement,
ions
solubility
limit
KHCO3,
leading
Electrochemical
CO2
reduction
(CO2R)
to
chemicals
and
fuels
has
made
tremendous
progress
since
the
introduction
of
gas
diffusion
electrodes
(GDEs)
overcome
mass-transfer
limitations
enable
industrial-scale
current
densities.
The
advancement
in
field,
however,
come
with
new
challenges
that
are
related
stability
degradation
GDE
due
flooding
issues,
which
currently
hinder
scale-up.
Here,
we
investigated
effect
six
different
binding
materials
(Nafion,
polytetrafluoroethylene,
Fumion,
Pention,
poly(vinyl
alcohol),
polypyrrole)
on
performance
Ag-based
GDEs
for
CO2R
CO
alkaline
media.
All
binders
show
a
decrease
Faraday
efficiency
(FE)
increase
hydrogen
evolution
reaction
over
time.
most
hydrophilic
based
polypyrrole
can
uphold
higher
FE
longer
times,
is
contrary
common
belief
low
wettability
required
long-term
stability.
By
using
range
tools
(SEM–EDX,
SEM–FIB,
X-ray
diffraction,
contact
angle
measurements)
postelectrolysis
characterization
GDEs,
loss
flooding,
bi(carbonate)
precipitation,
catalyst
agglomeration.
These
results
contribute
better
understanding
issues
GDE-based
electrolyzers.
Electrochimica Acta,
Journal Year:
2024,
Volume and Issue:
486, P. 144090 - 144090
Published: March 11, 2024
Anion
Exchange
Membrane
Water
Electrolyzers
(AEMWE)
hold
the
promise
of
combining
advantages
both
liquid
alkaline
and
PEM
technologies,
offering
higher
purity
hydrogen
production,
improved
efficiency,
dynamic
behaviour.
Nevertheless,
AEM
systems
face
notable
challenges,
particularly
in
enhancing
ion
conductivity
stability
membrane.
The
chemical
AEMs
is,
particular,
one
biggest
issues,
giving
high
solutions
used
as
electrolyte.
To
overcome
those
problems,
here
this
work,
strategy
chosen
is
simple
addition
an
inorganic
filler
polymer
matrix
Various
amounts
Graphene
Oxide
(GO),
synthesized
using
modified
Hummers
method,
were
incorporated
into
Fumion-based
membranes.
resulting
shows
water
uptake,
stability,
thermal
and,
with
right
amount
filler,
also
enhanced
conductivity.
In
all
composite
membranes
show
diminished
weight
loss
I.E.C.
after
170h
6M
KOH
at
80°C.
Fumion-GO
3%GO
(wt%)
a
remarkable
current
density
than
1
A/cm2
2
V
60°C
chronoamperometric
test.
ACS Applied Engineering Materials,
Journal Year:
2024,
Volume and Issue:
2(6), P. 1654 - 1662
Published: May 21, 2024
Carbon-supported
silver
catalysts
have
proven
high
activity
and
durability
in
the
electrochemical
reduction
of
CO2
to
CO.
This
work
investigates
impact
cathode
catalyst
layer
composition
on
performance
by
varying
ionomer
content
Ag/C
with
differing
BET
surface
areas
(33–455
m2
g–1).
For
optimal
performance,
there
is
a
positive
correlation
between
binder
area:
5
wt
%
PiperION
for
Ag/CSuper
P,
15
Ag/CVulcan,
25
Ag/CKetjen.
The
top-performing
cells
exhibited
remarkably
CO
faradaic
efficiencies
93%
91%
Piperion
90%
Ag/CKetjen
(all
at
400
mA
cm–2
0.01
M
CsOH
as
anolyte).
Long-term
measurements
300
over
100
h
revealed
lowest
FECO
loss
decreasing
from
93
87%,
followed
P
(91–79%)
(90–63%).
ChemElectroChem,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 20, 2025
Abstract
Electrocatalytic
CO
2
reduction
(CO
R)
offers
a
promising
pathway
for
closing
the
carbon
cycle.
Metallic
Cu‐based
catalysts
are
only
materials
capable
of
converting
to
C
2+
products
with
significant
selectivity
and
activity.
Achieving
industrially
relevant
current
densities
in
R
requires
use
gas
diffusion
electrodes
(GDEs),
making
structure
properties
catalyst
layer
(CL)
on
GDEs
critical
performance
Cu
catalysts.
However,
limited
research
has
explored
how
ink
composition
affects
CL
features
and,
consequently,
under
operating
conditions.
In
this
study,
we
investigate
influence
morphology,
these
affect
performance.
We
find
that
water
content
modifies
active
site
density,
thickness,
porosity
CL,
as
well
state
Nafion
binder,
thereby
altering
microenvironment
sites
during
R,
including
local
concentration
pH.
Our
results
reveal
strong
correlation
between
structural
characteristics
CL.
Specifically,
optimizing
ethanol‐to‐water
ratio
enhances
product
density
75
%
450
mA
cm
−2
,
respectively.
This
approach
provides
simple
yet
effective
strategy
improve
activity
practical
ChemElectroChem,
Journal Year:
2024,
Volume and Issue:
11(5)
Published: Jan. 26, 2024
Abstract
Carbon
dioxide
electroreduction
(CO
2
R)
is
a
promising
technology
for
mitigating
industrial
CO
emissions
and
generating
valuable
chemicals
using
renewable
energy
sources.
Recent
advances
have
centered
on
fine‐tuning
catalyst
materials
their
micro‐environments,
stimulating
interest
within
the
R
community.
However,
testing
novel
often
occurs
under
conditions
different
from
those
relevant
to
applications.
In
this
study,
we
explore
transferability
of
results
obtained
Ag‐based
gas
diffusion
electrode
(GDEs)
in
an
easy
fabricate,
assemble
test
zero‐gap
half‐cell
(ZGHC)
electrolyzer
(ZGE).
Our
investigation
reveals
that
not
only
influenced
by
reactor
design,
but
also
partially
dependent
type
additive
used
layer
GDE.
Moreover,
show
humidity
crucial
operational
parameter
impacts
selectivity
influences
its
stability
during
ZGHC.
These
findings
highlight
importance
comprehensively
considering
as
well
designs
when
comparing
between
ZGHC
ZGE,
presenting
finally
pathway
how
minimize
such
differences.
