Inorganic Chemistry,
Год журнала:
2023,
Номер
62(38), С. 15766 - 15776
Опубликована: Сен. 13, 2023
Large-scale
solar-driven
water
splitting
is
a
way
to
store
energy,
but
it
requires
the
development
of
practical
and
durable
oxygen
evolution
reaction
(OER)
catalysts.
The
present
paper
aims
investigate
mechanism
OER,
local
pH,
high-valent
metal
ions,
limitations,
conversions,
details
during
OER
in
presence
FeNi
foam
using
situ
surface-enhanced
Raman
spectroscopy.
This
research
also
explores
use
spectroscopy
for
detecting
species
on
surfaces
OER.
acidic
media
around
electrode
not
only
limit
process
affect
phosphate
ion
protonation
overall
catalysis
effectiveness.
study
proposes
that
hydroxides
serve
as
true
catalysts
under
neutral
conditions,
rather
than
phosphates.
However,
remain
crucial
proton
transfer
molecule
adsorption.
Changes
observed
pH
at
open-circuit
potential
suggest
new
insights
concerning
coordination
Ni(II)
ions
certain
conditions.
By
extrapolating
Tafel
plot,
overpotential
onset
was
determined
be
470
mV.
Furthermore,
overpotentials
current
densities
1
5
mA/cm2
were
590
790
mV,
respectively.
These
findings
offer
valuable
into
advancement
our
understanding
underlying
efficient
splitting;
both
are
elements
purpose
energy
storage.
Energy & environment materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 19, 2024
Aqueous
batteries
with
metal
anodes
exhibit
robust
anodic
capacities,
but
their
energy
densities
are
low
because
of
the
limited
potential
stabilities
aqueous
electrolyte
solutions.
Current
options,
such
as
Zn
and
Al,
pose
a
dilemma:
lacks
sufficiently
redox
potential,
whereas
Al
tends
to
be
strongly
oxidized
in
environments.
Our
investigation
introduces
novel
rechargeable
battery
system
based
on
Mn
anode.
We
examine
effects
anions,
concentration,
diverse
cathode
chemistries.
Notably,
ClO
4
‐based
solution
exhibits
improved
deposition
dissolution
efficiencies.
Although
stainless
steel
(SS
316
L)
Ni
stable
current
collectors
for
cathodes,
they
display
limitations
anodes.
However,
using
Ti
anode
resulted
increased
Moreover,
we
evaluate
this
various
materials,
including
Mn‐intercalation‐based
inorganic
(Ag
0.33
V
2
O
5
)
organic
(perylenetetracarboxylic
dianhydride)
cathodes
an
anion‐intercalation‐chemistry
(coronene)‐based
cathode.
These
configurations
yield
markedly
higher
output
potentials
compared
those
batteries,
highlighting
augmented
density
when
This
study
outlines
systematic
approach
use
optimizing
unlocking
prospects
Mn‐based
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 29, 2024
Abstract
Electrolysis
of
seawater
represents
great
potentials
for
sustainable
hydrogen
production.
However,
both
competitive
Cl
−
adsorption
and
catalysts
corrosion
caused
by
chlorine
oxidation
reaction
(ClOR)
are
major
challenges
in
electrolysis.
Inspired
the
concept
hard
soft
acids
bases
(HSAB),
polyphosphate
oxyanions
(P
3
O
10
5−
)
on
Ni(OH)
2
surface
is
coordinated
to
obtain
harder
acid
Ni
sites,
which
could
160
times
stability
enhancement
compared
pure
oxygen
evolution
(OER)
alkaline
at
800
mA
cm
−2
.
Also,
turnover
frequency
value
‐P
50
that
,
implying
higher
intrinsic
OER
activity
Theoretical
experimental
investigations
show
P
facilitate
transition
3+
>3+
thus
preferring
base
OH
rather
than
This
enhance
selectivity
inhibit
undesirable
ClOR.
Furthermore,
molecular
dynamics
simulations
indicate
concentration
near
electrode
be
reduced
nearly
half
due
electrostatic
repulsion
oxyanions.
When
assembled
into
an
electrolyzer
splitting,
it
operate
2.2
V
with
large
current
up
1.4
A
240
h.
Inorganic Chemistry,
Год журнала:
2023,
Номер
62(38), С. 15766 - 15776
Опубликована: Сен. 13, 2023
Large-scale
solar-driven
water
splitting
is
a
way
to
store
energy,
but
it
requires
the
development
of
practical
and
durable
oxygen
evolution
reaction
(OER)
catalysts.
The
present
paper
aims
investigate
mechanism
OER,
local
pH,
high-valent
metal
ions,
limitations,
conversions,
details
during
OER
in
presence
FeNi
foam
using
situ
surface-enhanced
Raman
spectroscopy.
This
research
also
explores
use
spectroscopy
for
detecting
species
on
surfaces
OER.
acidic
media
around
electrode
not
only
limit
process
affect
phosphate
ion
protonation
overall
catalysis
effectiveness.
study
proposes
that
hydroxides
serve
as
true
catalysts
under
neutral
conditions,
rather
than
phosphates.
However,
remain
crucial
proton
transfer
molecule
adsorption.
Changes
observed
pH
at
open-circuit
potential
suggest
new
insights
concerning
coordination
Ni(II)
ions
certain
conditions.
By
extrapolating
Tafel
plot,
overpotential
onset
was
determined
be
470
mV.
Furthermore,
overpotentials
current
densities
1
5
mA/cm2
were
590
790
mV,
respectively.
These
findings
offer
valuable
into
advancement
our
understanding
underlying
efficient
splitting;
both
are
elements
purpose
energy
storage.
