ACS electrochemistry.,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 13, 2024
Establishing
efficient
extracellular
electron
transfer
(EET)
between
bacteria
and
electrode
surfaces
is
critical
for
the
development
of
sustainable
microbial
electrochemical
technologies.
In
this
context,
soluble,
redox-active
quinones
are
frequently
employed
as
exogenous
shuttles
(i.e.,
mediators)
to
facilitate
EET
from
respiration
processes
surface.
However,
there
limited
information
on
mediated
bioelectrocatalytic
performance
quinone-mediated
with
regard
mediator
properties.
study,
we
show
a
quinone-based
system
designed
in
model
microorganism
Escherichia
coli
during
glucose
metabolism.
A
library
12
quinone
redox
mediators
was
experimentally
evaluated
through
measurements,
revealing
distinct
current
densities,
dependent
structure
concentration.
Among
tested,
tetrahydroxy-1,4-benzoquinone
achieved
highest
density
11.7
±
1.1
μA
cm–2.
Further
characterization
formal
reduction
potentials
each
both
aqueous
aprotic
media
performed.
Our
results
that
properties
environments
correlate
measured
densities
E.
coli,
suggesting
step
occurs
either
within
cytoplasm
(or
periplasm)
bacterial
cells
or
outside
cell.
This
study
offers
valuable
insight
into
rationally
designing
bioelectrocatalysis
systems.
As
such,
it
highlights
importance
independently
understanding
type,
metabolic
processes,
behavior
media.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(7), P. 4521 - 4531
Published: Feb. 12, 2024
In
redox
flow
batteries,
a
compelling
strategy
for
enhancing
the
charge
capacity
of
redox-active
organic
molecules
involves
storing
multiple
electrons
within
single
molecule.
However,
this
approach
poses
unique
challenges
such
as
chemical
instability
by
forming
radicals,
elevated
energy
requirements,
and
unsustainable
concentration.
Ion
pairing
is
possible
solution
to
achieve
neutrality
engineer
potential
shifts
but
has
received
limited
attention.
study,
we
demonstrate
that
Li+
can
stabilize
naphthalene
diimide
(NDI)
anions
dissolved
in
acetonitrile
significantly
shift
second
cathodic
close
first.
Our
findings,
supported
density
functional
theory
calculations
Fourier
transform
infrared
spectroscopy,
indicate
dimeric
NDI
species
form
stable
ion
pairs
with
Li+.
Conversely,
K+
ions
exhibit
weak
interactions,
cyclic
voltammograms
confirm
significant
when
stronger
Lewis
acids
solvents
lower
donor
numbers
are
employed.
Galvanostatic
examinations
reveal
voltage
plateau
Li+,
which
indicates
rapid
process
involving
doubly
charged
NDI2–
These
aggregated
offer
additional
benefits
hindering
crossover
events,
contributing
excellent
cyclability,
suppressing
undesirable
side
reactions
even
after
1000
cycles.
Chemical Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
The
inert
carbon
pores
are
revitalized
by
incorporating
benzoquinone,
resulting
in
flexible
zinc-ion
capacitors
with
an
energy
density
of
218
W
h
kg
−1
.
ChemPhotoChem,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 4, 2025
Anthraquinone
sulfonates
are
water‐soluble
and
cost‐effective
photocatalysts
that
have
been
attracting
increasing
interest
due
to
their
unique
features.
Their
sulfonate
groups
unlock
the
application
of
photoactive
anthraquinone
core
in
aqueous
solution.
Moreover,
these
readily
available
catalysts
can
engage
with
substrates
through
different
activation
modes,
such
as
hydrogen
atom
transfer
proton‐coupled
electron
events.
However,
date,
reactivity
has
not
fully
explored
further
applications
expected
emerge.
Herein,
existing
synthetic
outlined
future
perspectives
discussed.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 6, 2025
Stabilizing
radical
intermediates
of
redox-active
organic
molecules
in
aqueous
media
is
crucial
for
advancing
applications
energy
storage,
catalysis,
and
electrosynthesis.
This
study
investigates
the
stabilization
protonated
pyrazine
derivatives
water-in-salt
electrolytes
(WISEs)
with
7-8
m
LiTFSI.
Strong
interactions
between
Li+-coordinated
water
(Li(H2O)n+)
WISEs
prevent
molecular
aggregation
protect
from
disproportionation
oxygen-induced
degradation.
Voltammetric
results
show
that
higher
concentrations
LiTFSI
enhance
both
stability
redox
reversibility
dimethylpyrazine
(DMP)
intermediates,
protonation
identified
as
a
key
stabilizing
factor.
Notably,
these
effects
were
absent
solutions
containing
concentrated
LiCl
or
LiNO3.
Fourier-transform
infrared
(FTIR)
spectroscopy
dynamics
(MD)
simulations
confirmed
reduced
DMP
LiTFSI-based
electrolytes,
driven
by
Li(H2O)n+,
while
no
similar
solvation
structure
modification
occurred
The
exhibited
greater
resistance
to
degradation
compared
conventional
acidic
solutions.
Additionally,
substitution
methyl
ethyl
groups
on
ring
destabilized
corresponding
WISEs,
primarily
due
alkyl
inductive
effect,
evidenced
electrochemical
UV-visible
absorption
spectroscopy.
Charge-discharge
tests
an
H-cell
further
demonstrated
significantly
improved
Coulombic
efficiency
reactions
Salt-in-Water
underscoring
importance
intermediate
stabilization.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
17(13)
Published: Feb. 20, 2024
Abstract
The
impressive
theoretical
capacity
and
low
electrode
potential
render
Li
metal
anodes
the
most
promising
candidate
for
next‐generation
Li‐based
batteries.
However,
uncontrolled
growth
of
dendrites
associated
parasitic
reactions
have
impeded
their
cycling
stability
raised
safety
concerns
regarding
future
commercialization.
reactions,
however,
pose
challenges
to
To
tackle
these
enhance
safety,
a
range
polymers
demonstrated
owing
distinctive
electrochemical,
physical,
mechanical
properties.
This
review
provides
comprehensive
discussion
on
utilization
in
rechargeable
Li‐metal
batteries,
encompassing
solid
polymer
electrolytes,
quasi‐solid
electrolyte
additives.
Furthermore,
it
conducts
an
analysis
benefits
with
employing
various
applications.
Lastly,
this
puts
forward
development
directions
proposes
strategies
integrating
into
anodes.
